./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix032.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix032.opt.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/mix032.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix032.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 23:37:33,944 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 23:37:34,014 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 23:37:34,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 23:37:34,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 23:37:34,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 23:37:34,045 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 23:37:34,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 23:37:34,046 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 23:37:34,050 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 23:37:34,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 23:37:34,051 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 23:37:34,051 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 23:37:34,053 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 23:37:34,053 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 23:37:34,053 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 23:37:34,053 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 23:37:34,054 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 23:37:34,054 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 23:37:34,054 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 23:37:34,054 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 23:37:34,055 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 23:37:34,055 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 23:37:34,055 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 23:37:34,055 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 23:37:34,055 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 23:37:34,056 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 23:37:34,056 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 23:37:34,057 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 23:37:34,057 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 23:37:34,058 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 23:37:34,058 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 23:37:34,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:37:34,058 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 23:37:34,058 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 23:37:34,059 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 23:37:34,059 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 23:37:34,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 23:37:34,059 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 23:37:34,059 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 23:37:34,060 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 23:37:34,060 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 23:37:34,060 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 23:37:34,061 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 23:37:34,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 23:37:34,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 23:37:34,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 23:37:34,298 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 23:37:34,312 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 23:37:34,313 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/mix032.opt.yml/witness.yml [2024-06-27 23:37:34,434 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 23:37:34,435 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 23:37:34,435 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix032.opt.i [2024-06-27 23:37:35,485 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 23:37:35,717 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 23:37:35,718 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix032.opt.i [2024-06-27 23:37:35,732 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd8bb03b6/536de035b84248e688e947ca49330d45/FLAG39543b2d6 [2024-06-27 23:37:35,746 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd8bb03b6/536de035b84248e688e947ca49330d45 [2024-06-27 23:37:35,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 23:37:35,749 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 23:37:35,750 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 23:37:35,750 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 23:37:35,754 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 23:37:35,755 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:37:34" (1/2) ... [2024-06-27 23:37:35,756 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3078de1c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:37:35, skipping insertion in model container [2024-06-27 23:37:35,756 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:37:34" (1/2) ... [2024-06-27 23:37:35,758 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@55692a63 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 11:37:35, skipping insertion in model container [2024-06-27 23:37:35,758 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:37:35" (2/2) ... [2024-06-27 23:37:35,759 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3078de1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:35, skipping insertion in model container [2024-06-27 23:37:35,759 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 11:37:35" (2/2) ... [2024-06-27 23:37:35,759 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 23:37:35,784 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 23:37:35,785 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )a >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )b >= 0LL) && (0LL - (long long )z) + (long long )z$r_buff0_thd3 >= 0LL) && (0LL - (long long )z) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd3 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )b >= 0LL) && (long long )__unbuffered_p1_EBX - (long long )z$mem_tmp >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd3 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff1_thd3 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-27 23:37:35,786 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )a >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )b >= 0LL) && (0LL - (long long )z) + (long long )z$r_buff0_thd3 >= 0LL) && (0LL - (long long )z) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd3 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )b >= 0LL) && (long long )__unbuffered_p1_EBX - (long long )z$mem_tmp >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd3 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff1_thd3 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-27 23:37:35,786 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ! multithreaded || (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EAX) + (long long )x >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$mem_tmp >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (0LL - (long long )__unbuffered_p1_EBX) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )__unbuffered_p2_EAX) + (long long )a >= 0LL) && (0LL - (long long )__unbuffered_p2_EBX) + (long long )b >= 0LL) && (0LL - (long long )z) + (long long )z$r_buff0_thd3 >= 0LL) && (0LL - (long long )z) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$r_buff0_thd3 >= 0LL) && (0LL - (long long )z$mem_tmp) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff0_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff0 >= 0LL) && (0LL - (long long )z$r_buff1_thd3) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$mem_tmp >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff0_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$r_buff1_thd3 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$read_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff0_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )z$w_buff1_used >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )weak$$choice2 >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p1_EBX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$flush_delayed >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff0_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd0 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$r_buff1_thd2 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) - (long long )z$read_delayed >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )b >= 0LL) && (long long )__unbuffered_p1_EBX - (long long )z$mem_tmp >= 0LL) && (long long )z - (long long )z$mem_tmp >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$r_buff1_thd3 >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$w_buff0 >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$w_buff0_used >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff0_thd3 - (long long )z$w_buff1_used >= 0LL) && (long long )z$r_buff1_thd3 - (long long )z$w_buff1 >= 0LL) && (long long )z$r_buff1_thd3 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff0_used >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1 >= 0LL) && (long long )z$w_buff0 - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff0_used - (long long )z$w_buff1_used >= 0LL) && (long long )z$w_buff1 - (long long )z$w_buff1_used >= 0LL) [2024-06-27 23:37:35,786 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 23:37:35,786 INFO L106 edCorrectnessWitness]: ghost_update [L846-L846] multithreaded = 1; [2024-06-27 23:37:35,827 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 23:37:36,227 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:37:36,253 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 23:37:36,404 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 23:37:36,445 INFO L206 MainTranslator]: Completed translation [2024-06-27 23:37:36,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36 WrapperNode [2024-06-27 23:37:36,445 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 23:37:36,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 23:37:36,447 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 23:37:36,447 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 23:37:36,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36" (1/1) ... [2024-06-27 23:37:36,472 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36" (1/1) ... [2024-06-27 23:37:36,509 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 136 [2024-06-27 23:37:36,509 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 23:37:36,509 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 23:37:36,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 23:37:36,510 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 23:37:36,525 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36" (1/1) ... [2024-06-27 23:37:36,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36" (1/1) ... [2024-06-27 23:37:36,530 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36" (1/1) ... [2024-06-27 23:37:36,552 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 23:37:36,552 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36" (1/1) ... [2024-06-27 23:37:36,553 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36" (1/1) ... [2024-06-27 23:37:36,560 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36" (1/1) ... [2024-06-27 23:37:36,561 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36" (1/1) ... [2024-06-27 23:37:36,563 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36" (1/1) ... [2024-06-27 23:37:36,565 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36" (1/1) ... [2024-06-27 23:37:36,569 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 23:37:36,569 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 23:37:36,569 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 23:37:36,569 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 23:37:36,570 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36" (1/1) ... [2024-06-27 23:37:36,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 23:37:36,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 23:37:36,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 23:37:36,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 23:37:36,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 23:37:36,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 23:37:36,628 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 23:37:36,628 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 23:37:36,628 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 23:37:36,628 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 23:37:36,629 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 23:37:36,629 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 23:37:36,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 23:37:36,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 23:37:36,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 23:37:36,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 23:37:36,630 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 23:37:36,757 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 23:37:36,758 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 23:37:37,142 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 23:37:37,143 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 23:37:37,323 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 23:37:37,324 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 23:37:37,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:37:37 BoogieIcfgContainer [2024-06-27 23:37:37,325 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 23:37:37,327 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 23:37:37,327 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 23:37:37,329 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 23:37:37,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 11:37:34" (1/4) ... [2024-06-27 23:37:37,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6c36b8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 11:37:37, skipping insertion in model container [2024-06-27 23:37:37,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 11:37:35" (2/4) ... [2024-06-27 23:37:37,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6c36b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:37:37, skipping insertion in model container [2024-06-27 23:37:37,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 11:37:36" (3/4) ... [2024-06-27 23:37:37,332 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d6c36b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 11:37:37, skipping insertion in model container [2024-06-27 23:37:37,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 11:37:37" (4/4) ... [2024-06-27 23:37:37,333 INFO L112 eAbstractionObserver]: Analyzing ICFG mix032.opt.i [2024-06-27 23:37:37,345 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 23:37:37,346 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 23:37:37,346 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 23:37:37,387 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 23:37:37,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 23:37:37,443 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-27 23:37:37,443 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:37:37,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 23:37:37,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 23:37:37,449 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-27 23:37:37,455 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 23:37:37,460 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;@2d0df74c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 23:37:37,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 23:37:37,466 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 23:37:37,467 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 23:37:37,467 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 23:37:37,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:37,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 23:37:37,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:37,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash 373099719, now seen corresponding path program 1 times [2024-06-27 23:37:37,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:37,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96638912] [2024-06-27 23:37:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:37,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:37:38,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:38,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96638912] [2024-06-27 23:37:38,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96638912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:38,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:38,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 23:37:38,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753586074] [2024-06-27 23:37:38,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:38,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 23:37:38,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:38,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 23:37:38,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 23:37:38,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-27 23:37:38,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:38,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:38,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-27 23:37:38,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:39,316 INFO L124 PetriNetUnfolderBase]: 1116/1820 cut-off events. [2024-06-27 23:37:39,317 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 23:37:39,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3571 conditions, 1820 events. 1116/1820 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9665 event pairs, 768 based on Foata normal form. 1/1733 useless extension candidates. Maximal degree in co-relation 3559. Up to 1676 conditions per place. [2024-06-27 23:37:39,330 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 31 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 23:37:39,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 175 flow [2024-06-27 23:37:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 23:37:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 23:37:39,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-27 23:37:39,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-06-27 23:37:39,342 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 86 transitions. [2024-06-27 23:37:39,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 175 flow [2024-06-27 23:37:39,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 23:37:39,346 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-27 23:37:39,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 23:37:39,350 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-27 23:37:39,350 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-27 23:37:39,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:39,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:39,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:39,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 23:37:39,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:39,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:39,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2066583910, now seen corresponding path program 1 times [2024-06-27 23:37:39,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:39,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968194088] [2024-06-27 23:37:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:39,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:37:40,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:40,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968194088] [2024-06-27 23:37:40,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968194088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:40,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:40,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 23:37:40,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616694338] [2024-06-27 23:37:40,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:40,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 23:37:40,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:40,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 23:37:40,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 23:37:40,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-27 23:37:40,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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) [2024-06-27 23:37:40,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:40,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-27 23:37:40,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:40,834 INFO L124 PetriNetUnfolderBase]: 1280/2023 cut-off events. [2024-06-27 23:37:40,834 INFO L125 PetriNetUnfolderBase]: For 393/397 co-relation queries the response was YES. [2024-06-27 23:37:40,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4544 conditions, 2023 events. 1280/2023 cut-off events. For 393/397 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10539 event pairs, 750 based on Foata normal form. 5/1999 useless extension candidates. Maximal degree in co-relation 4532. Up to 1897 conditions per place. [2024-06-27 23:37:40,844 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 39 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-27 23:37:40,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 244 flow [2024-06-27 23:37:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 23:37:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 23:37:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-27 23:37:40,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193181818181818 [2024-06-27 23:37:40,848 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 109 transitions. [2024-06-27 23:37:40,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 244 flow [2024-06-27 23:37:40,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 23:37:40,850 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-27 23:37:40,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 23:37:40,851 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-27 23:37:40,852 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-27 23:37:40,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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) [2024-06-27 23:37:40,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:40,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:40,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 23:37:40,855 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:40,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:40,857 INFO L85 PathProgramCache]: Analyzing trace with hash -360406934, now seen corresponding path program 1 times [2024-06-27 23:37:40,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:40,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843784756] [2024-06-27 23:37:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:40,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:37:42,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:42,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843784756] [2024-06-27 23:37:42,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843784756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:42,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:42,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:37:42,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130102784] [2024-06-27 23:37:42,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:42,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:37:42,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:42,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:37:42,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:37:42,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 23:37:42,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:42,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:42,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 23:37:42,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:42,708 INFO L124 PetriNetUnfolderBase]: 1555/2468 cut-off events. [2024-06-27 23:37:42,709 INFO L125 PetriNetUnfolderBase]: For 1295/1298 co-relation queries the response was YES. [2024-06-27 23:37:42,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6090 conditions, 2468 events. 1555/2468 cut-off events. For 1295/1298 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13000 event pairs, 659 based on Foata normal form. 7/2449 useless extension candidates. Maximal degree in co-relation 6076. Up to 2237 conditions per place. [2024-06-27 23:37:42,722 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 51 selfloop transitions, 14 changer transitions 0/73 dead transitions. [2024-06-27 23:37:42,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 73 transitions, 372 flow [2024-06-27 23:37:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:37:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:37:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-27 23:37:42,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6181818181818182 [2024-06-27 23:37:42,725 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 136 transitions. [2024-06-27 23:37:42,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 73 transitions, 372 flow [2024-06-27 23:37:42,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 358 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 23:37:42,727 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 205 flow [2024-06-27 23:37:42,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-27 23:37:42,728 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-27 23:37:42,728 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 205 flow [2024-06-27 23:37:42,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:42,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:42,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:42,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 23:37:42,729 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:42,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:42,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1537762021, now seen corresponding path program 1 times [2024-06-27 23:37:42,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:42,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665920396] [2024-06-27 23:37:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:42,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:37:44,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:44,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665920396] [2024-06-27 23:37:44,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665920396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:44,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:44,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:37:44,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34406741] [2024-06-27 23:37:44,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:44,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:37:44,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:37:44,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:37:44,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 23:37:44,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:44,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:44,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 23:37:44,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:44,860 INFO L124 PetriNetUnfolderBase]: 1563/2448 cut-off events. [2024-06-27 23:37:44,860 INFO L125 PetriNetUnfolderBase]: For 2554/2557 co-relation queries the response was YES. [2024-06-27 23:37:44,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6834 conditions, 2448 events. 1563/2448 cut-off events. For 2554/2557 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12567 event pairs, 474 based on Foata normal form. 12/2426 useless extension candidates. Maximal degree in co-relation 6819. Up to 2201 conditions per place. [2024-06-27 23:37:44,871 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 55 selfloop transitions, 17 changer transitions 0/80 dead transitions. [2024-06-27 23:37:44,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 80 transitions, 451 flow [2024-06-27 23:37:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:37:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:37:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 23:37:44,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-27 23:37:44,875 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 205 flow. Second operand 6 states and 157 transitions. [2024-06-27 23:37:44,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 80 transitions, 451 flow [2024-06-27 23:37:44,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 80 transitions, 439 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 23:37:44,881 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 253 flow [2024-06-27 23:37:44,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=253, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-27 23:37:44,882 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-27 23:37:44,882 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 253 flow [2024-06-27 23:37:44,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:44,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:44,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:44,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 23:37:44,883 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:44,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash 2089932753, now seen corresponding path program 1 times [2024-06-27 23:37:44,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:44,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598179962] [2024-06-27 23:37:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:44,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:37:46,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:46,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598179962] [2024-06-27 23:37:46,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598179962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:46,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:46,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:37:46,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990682164] [2024-06-27 23:37:46,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:46,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:37:46,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:46,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:37:46,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:37:46,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:37:46,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:46,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:46,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:37:46,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:47,056 INFO L124 PetriNetUnfolderBase]: 1594/2579 cut-off events. [2024-06-27 23:37:47,056 INFO L125 PetriNetUnfolderBase]: For 3988/3988 co-relation queries the response was YES. [2024-06-27 23:37:47,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7637 conditions, 2579 events. 1594/2579 cut-off events. For 3988/3988 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13686 event pairs, 694 based on Foata normal form. 2/2547 useless extension candidates. Maximal degree in co-relation 7619. Up to 2353 conditions per place. [2024-06-27 23:37:47,075 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 52 selfloop transitions, 13 changer transitions 0/72 dead transitions. [2024-06-27 23:37:47,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 468 flow [2024-06-27 23:37:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:37:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:37:47,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 23:37:47,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:37:47,078 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 253 flow. Second operand 6 states and 126 transitions. [2024-06-27 23:37:47,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 468 flow [2024-06-27 23:37:47,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 418 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 23:37:47,084 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 305 flow [2024-06-27 23:37:47,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2024-06-27 23:37:47,086 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-27 23:37:47,086 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 305 flow [2024-06-27 23:37:47,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:47,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:47,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:47,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 23:37:47,087 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:47,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:47,087 INFO L85 PathProgramCache]: Analyzing trace with hash -9278384, now seen corresponding path program 1 times [2024-06-27 23:37:47,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:47,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461006054] [2024-06-27 23:37:47,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:47,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:37:48,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:48,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461006054] [2024-06-27 23:37:48,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461006054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:48,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:48,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:37:48,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422819782] [2024-06-27 23:37:48,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:48,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:37:48,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:48,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:37:48,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:37:48,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:37:48,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 305 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:48,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:48,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:37:48,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:49,592 INFO L124 PetriNetUnfolderBase]: 1589/2604 cut-off events. [2024-06-27 23:37:49,592 INFO L125 PetriNetUnfolderBase]: For 5381/5381 co-relation queries the response was YES. [2024-06-27 23:37:49,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8169 conditions, 2604 events. 1589/2604 cut-off events. For 5381/5381 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 14052 event pairs, 676 based on Foata normal form. 2/2591 useless extension candidates. Maximal degree in co-relation 8146. Up to 2337 conditions per place. [2024-06-27 23:37:49,606 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 56 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-27 23:37:49,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 79 transitions, 515 flow [2024-06-27 23:37:49,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:37:49,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:37:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 23:37:49,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-27 23:37:49,607 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 305 flow. Second operand 7 states and 145 transitions. [2024-06-27 23:37:49,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 79 transitions, 515 flow [2024-06-27 23:37:49,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 491 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 23:37:49,612 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 349 flow [2024-06-27 23:37:49,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=349, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-27 23:37:49,614 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-27 23:37:49,614 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 349 flow [2024-06-27 23:37:49,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:49,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:49,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:49,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 23:37:49,615 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:49,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:49,615 INFO L85 PathProgramCache]: Analyzing trace with hash -465126504, now seen corresponding path program 1 times [2024-06-27 23:37:49,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:49,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755637732] [2024-06-27 23:37:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:49,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:49,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:37:51,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:51,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755637732] [2024-06-27 23:37:51,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755637732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:51,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:51,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:37:51,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236795875] [2024-06-27 23:37:51,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:51,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:37:51,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:51,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:37:51,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:37:51,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:37:51,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:51,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:51,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:37:51,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:52,101 INFO L124 PetriNetUnfolderBase]: 1758/2810 cut-off events. [2024-06-27 23:37:52,101 INFO L125 PetriNetUnfolderBase]: For 8487/8487 co-relation queries the response was YES. [2024-06-27 23:37:52,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9627 conditions, 2810 events. 1758/2810 cut-off events. For 8487/8487 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14861 event pairs, 698 based on Foata normal form. 2/2795 useless extension candidates. Maximal degree in co-relation 9601. Up to 2550 conditions per place. [2024-06-27 23:37:52,116 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 68 selfloop transitions, 22 changer transitions 0/98 dead transitions. [2024-06-27 23:37:52,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 692 flow [2024-06-27 23:37:52,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:37:52,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:37:52,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 23:37:52,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-27 23:37:52,118 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 349 flow. Second operand 8 states and 163 transitions. [2024-06-27 23:37:52,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 692 flow [2024-06-27 23:37:52,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 654 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 23:37:52,124 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 484 flow [2024-06-27 23:37:52,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=484, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2024-06-27 23:37:52,125 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-27 23:37:52,125 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 484 flow [2024-06-27 23:37:52,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:52,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:52,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:52,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 23:37:52,126 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:52,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:52,126 INFO L85 PathProgramCache]: Analyzing trace with hash -465006348, now seen corresponding path program 1 times [2024-06-27 23:37:52,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:52,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794374364] [2024-06-27 23:37:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:52,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:37:53,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:53,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794374364] [2024-06-27 23:37:53,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794374364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:53,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:53,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:37:53,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17526451] [2024-06-27 23:37:53,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:53,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:37:53,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:53,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:37:53,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:37:53,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:37:53,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 484 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:53,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:53,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:37:53,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:54,563 INFO L124 PetriNetUnfolderBase]: 1917/2993 cut-off events. [2024-06-27 23:37:54,564 INFO L125 PetriNetUnfolderBase]: For 10742/10754 co-relation queries the response was YES. [2024-06-27 23:37:54,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10714 conditions, 2993 events. 1917/2993 cut-off events. For 10742/10754 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15368 event pairs, 759 based on Foata normal form. 7/2982 useless extension candidates. Maximal degree in co-relation 10685. Up to 2735 conditions per place. [2024-06-27 23:37:54,583 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 78 selfloop transitions, 32 changer transitions 0/116 dead transitions. [2024-06-27 23:37:54,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 116 transitions, 946 flow [2024-06-27 23:37:54,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:37:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:37:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 23:37:54,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-27 23:37:54,585 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 484 flow. Second operand 7 states and 150 transitions. [2024-06-27 23:37:54,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 116 transitions, 946 flow [2024-06-27 23:37:54,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 116 transitions, 924 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-27 23:37:54,592 INFO L231 Difference]: Finished difference. Result has 77 places, 92 transitions, 676 flow [2024-06-27 23:37:54,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=676, PETRI_PLACES=77, PETRI_TRANSITIONS=92} [2024-06-27 23:37:54,594 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-27 23:37:54,594 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 92 transitions, 676 flow [2024-06-27 23:37:54,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:54,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:54,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:54,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 23:37:54,595 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:54,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:54,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1619291856, now seen corresponding path program 2 times [2024-06-27 23:37:54,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:54,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947599164] [2024-06-27 23:37:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:54,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:37:56,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:56,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947599164] [2024-06-27 23:37:56,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947599164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:56,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:56,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:37:56,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641458215] [2024-06-27 23:37:56,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:56,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:37:56,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:56,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:37:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:37:56,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:37:56,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 92 transitions, 676 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:56,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:56,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:37:56,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:56,914 INFO L124 PetriNetUnfolderBase]: 1928/3008 cut-off events. [2024-06-27 23:37:56,915 INFO L125 PetriNetUnfolderBase]: For 13416/13428 co-relation queries the response was YES. [2024-06-27 23:37:56,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11425 conditions, 3008 events. 1928/3008 cut-off events. For 13416/13428 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15389 event pairs, 748 based on Foata normal form. 10/3001 useless extension candidates. Maximal degree in co-relation 11390. Up to 2747 conditions per place. [2024-06-27 23:37:56,929 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 72 selfloop transitions, 38 changer transitions 0/116 dead transitions. [2024-06-27 23:37:56,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 116 transitions, 1017 flow [2024-06-27 23:37:56,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:37:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:37:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 23:37:56,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-27 23:37:56,931 INFO L175 Difference]: Start difference. First operand has 77 places, 92 transitions, 676 flow. Second operand 7 states and 145 transitions. [2024-06-27 23:37:56,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 116 transitions, 1017 flow [2024-06-27 23:37:56,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 116 transitions, 999 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-06-27 23:37:56,943 INFO L231 Difference]: Finished difference. Result has 84 places, 96 transitions, 783 flow [2024-06-27 23:37:56,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=783, PETRI_PLACES=84, PETRI_TRANSITIONS=96} [2024-06-27 23:37:56,944 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-06-27 23:37:56,944 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 96 transitions, 783 flow [2024-06-27 23:37:56,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:56,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:56,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:56,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 23:37:56,944 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:56,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:56,945 INFO L85 PathProgramCache]: Analyzing trace with hash -414799024, now seen corresponding path program 3 times [2024-06-27 23:37:56,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:56,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590616563] [2024-06-27 23:37:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:56,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:37:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:37:58,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:37:58,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590616563] [2024-06-27 23:37:58,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590616563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:37:58,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:37:58,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:37:58,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574305817] [2024-06-27 23:37:58,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:37:58,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:37:58,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:37:58,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:37:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:37:58,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:37:58,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 96 transitions, 783 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:58,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:37:58,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:37:58,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:37:59,303 INFO L124 PetriNetUnfolderBase]: 1923/3001 cut-off events. [2024-06-27 23:37:59,303 INFO L125 PetriNetUnfolderBase]: For 15685/15697 co-relation queries the response was YES. [2024-06-27 23:37:59,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11774 conditions, 3001 events. 1923/3001 cut-off events. For 15685/15697 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15365 event pairs, 748 based on Foata normal form. 10/2994 useless extension candidates. Maximal degree in co-relation 11734. Up to 2742 conditions per place. [2024-06-27 23:37:59,319 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 74 selfloop transitions, 37 changer transitions 0/117 dead transitions. [2024-06-27 23:37:59,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 117 transitions, 1101 flow [2024-06-27 23:37:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:37:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:37:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-27 23:37:59,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-27 23:37:59,321 INFO L175 Difference]: Start difference. First operand has 84 places, 96 transitions, 783 flow. Second operand 7 states and 146 transitions. [2024-06-27 23:37:59,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 117 transitions, 1101 flow [2024-06-27 23:37:59,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 117 transitions, 1027 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 23:37:59,334 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 813 flow [2024-06-27 23:37:59,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=813, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2024-06-27 23:37:59,334 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-27 23:37:59,334 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 813 flow [2024-06-27 23:37:59,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:37:59,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:37:59,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:37:59,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 23:37:59,335 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:37:59,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:37:59,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1628429288, now seen corresponding path program 2 times [2024-06-27 23:37:59,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:37:59,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809533689] [2024-06-27 23:37:59,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:37:59,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:37:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:00,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:00,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809533689] [2024-06-27 23:38:00,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809533689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:00,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:00,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:38:00,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271708790] [2024-06-27 23:38:00,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:00,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:38:00,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:00,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:38:00,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:38:00,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:38:00,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 813 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:00,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:00,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:38:00,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:01,449 INFO L124 PetriNetUnfolderBase]: 1871/2979 cut-off events. [2024-06-27 23:38:01,449 INFO L125 PetriNetUnfolderBase]: For 18451/18455 co-relation queries the response was YES. [2024-06-27 23:38:01,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11982 conditions, 2979 events. 1871/2979 cut-off events. For 18451/18455 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15680 event pairs, 690 based on Foata normal form. 6/2971 useless extension candidates. Maximal degree in co-relation 11939. Up to 2675 conditions per place. [2024-06-27 23:38:01,463 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 90 selfloop transitions, 39 changer transitions 0/141 dead transitions. [2024-06-27 23:38:01,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 141 transitions, 1297 flow [2024-06-27 23:38:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:38:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:38:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 23:38:01,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-27 23:38:01,465 INFO L175 Difference]: Start difference. First operand has 89 places, 97 transitions, 813 flow. Second operand 8 states and 170 transitions. [2024-06-27 23:38:01,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 141 transitions, 1297 flow [2024-06-27 23:38:01,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 141 transitions, 1244 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 23:38:01,482 INFO L231 Difference]: Finished difference. Result has 96 places, 116 transitions, 1050 flow [2024-06-27 23:38:01,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1050, PETRI_PLACES=96, PETRI_TRANSITIONS=116} [2024-06-27 23:38:01,482 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-27 23:38:01,482 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 116 transitions, 1050 flow [2024-06-27 23:38:01,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:01,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:01,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:01,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 23:38:01,483 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:01,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:01,483 INFO L85 PathProgramCache]: Analyzing trace with hash -605333970, now seen corresponding path program 3 times [2024-06-27 23:38:01,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:01,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004195100] [2024-06-27 23:38:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:01,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:02,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:02,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004195100] [2024-06-27 23:38:02,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004195100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:02,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:02,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:38:02,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472935580] [2024-06-27 23:38:02,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:02,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:38:02,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:02,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:38:02,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:38:02,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:38:02,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 116 transitions, 1050 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:02,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:02,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:38:02,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:03,819 INFO L124 PetriNetUnfolderBase]: 1930/3033 cut-off events. [2024-06-27 23:38:03,819 INFO L125 PetriNetUnfolderBase]: For 22795/22809 co-relation queries the response was YES. [2024-06-27 23:38:03,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12840 conditions, 3033 events. 1930/3033 cut-off events. For 22795/22809 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15801 event pairs, 784 based on Foata normal form. 8/3001 useless extension candidates. Maximal degree in co-relation 12793. Up to 2702 conditions per place. [2024-06-27 23:38:03,838 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 93 selfloop transitions, 71 changer transitions 0/176 dead transitions. [2024-06-27 23:38:03,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 176 transitions, 1697 flow [2024-06-27 23:38:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:38:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:38:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2024-06-27 23:38:03,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640151515151515 [2024-06-27 23:38:03,840 INFO L175 Difference]: Start difference. First operand has 96 places, 116 transitions, 1050 flow. Second operand 12 states and 245 transitions. [2024-06-27 23:38:03,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 176 transitions, 1697 flow [2024-06-27 23:38:03,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 176 transitions, 1614 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 23:38:03,868 INFO L231 Difference]: Finished difference. Result has 106 places, 137 transitions, 1376 flow [2024-06-27 23:38:03,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1376, PETRI_PLACES=106, PETRI_TRANSITIONS=137} [2024-06-27 23:38:03,869 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 61 predicate places. [2024-06-27 23:38:03,869 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 137 transitions, 1376 flow [2024-06-27 23:38:03,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:03,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:03,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:03,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 23:38:03,870 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:03,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:03,870 INFO L85 PathProgramCache]: Analyzing trace with hash -27871278, now seen corresponding path program 4 times [2024-06-27 23:38:03,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:03,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403371832] [2024-06-27 23:38:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:03,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:05,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:05,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403371832] [2024-06-27 23:38:05,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403371832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:05,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:05,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:38:05,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175093891] [2024-06-27 23:38:05,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:05,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:38:05,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:05,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:38:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:38:05,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:05,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 137 transitions, 1376 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:05,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:05,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:05,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:06,088 INFO L124 PetriNetUnfolderBase]: 2048/3198 cut-off events. [2024-06-27 23:38:06,089 INFO L125 PetriNetUnfolderBase]: For 25888/25896 co-relation queries the response was YES. [2024-06-27 23:38:06,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13923 conditions, 3198 events. 2048/3198 cut-off events. For 25888/25896 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 16492 event pairs, 758 based on Foata normal form. 5/3188 useless extension candidates. Maximal degree in co-relation 13874. Up to 2896 conditions per place. [2024-06-27 23:38:06,108 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 114 selfloop transitions, 60 changer transitions 0/180 dead transitions. [2024-06-27 23:38:06,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 180 transitions, 2001 flow [2024-06-27 23:38:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:38:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:38:06,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 23:38:06,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 23:38:06,110 INFO L175 Difference]: Start difference. First operand has 106 places, 137 transitions, 1376 flow. Second operand 8 states and 166 transitions. [2024-06-27 23:38:06,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 180 transitions, 2001 flow [2024-06-27 23:38:06,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 180 transitions, 1805 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 23:38:06,136 INFO L231 Difference]: Finished difference. Result has 107 places, 154 transitions, 1503 flow [2024-06-27 23:38:06,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1503, PETRI_PLACES=107, PETRI_TRANSITIONS=154} [2024-06-27 23:38:06,136 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2024-06-27 23:38:06,136 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 154 transitions, 1503 flow [2024-06-27 23:38:06,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:06,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:06,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:06,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 23:38:06,137 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:06,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:06,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1619282928, now seen corresponding path program 1 times [2024-06-27 23:38:06,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:06,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537712695] [2024-06-27 23:38:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:06,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:08,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:08,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537712695] [2024-06-27 23:38:08,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537712695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:08,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:08,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:08,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203155606] [2024-06-27 23:38:08,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:08,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:08,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:08,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:08,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:08,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:38:08,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 154 transitions, 1503 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:08,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:08,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:38:08,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:09,240 INFO L124 PetriNetUnfolderBase]: 1804/2941 cut-off events. [2024-06-27 23:38:09,240 INFO L125 PetriNetUnfolderBase]: For 25408/25408 co-relation queries the response was YES. [2024-06-27 23:38:09,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12800 conditions, 2941 events. 1804/2941 cut-off events. For 25408/25408 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 15730 event pairs, 648 based on Foata normal form. 3/2929 useless extension candidates. Maximal degree in co-relation 12752. Up to 2637 conditions per place. [2024-06-27 23:38:09,257 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 154 selfloop transitions, 22 changer transitions 0/183 dead transitions. [2024-06-27 23:38:09,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 183 transitions, 1991 flow [2024-06-27 23:38:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:38:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:38:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 23:38:09,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-27 23:38:09,259 INFO L175 Difference]: Start difference. First operand has 107 places, 154 transitions, 1503 flow. Second operand 9 states and 181 transitions. [2024-06-27 23:38:09,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 183 transitions, 1991 flow [2024-06-27 23:38:09,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 183 transitions, 1904 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 23:38:09,285 INFO L231 Difference]: Finished difference. Result has 113 places, 160 transitions, 1522 flow [2024-06-27 23:38:09,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1522, PETRI_PLACES=113, PETRI_TRANSITIONS=160} [2024-06-27 23:38:09,286 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-27 23:38:09,286 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 160 transitions, 1522 flow [2024-06-27 23:38:09,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:09,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:09,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:09,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 23:38:09,287 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:09,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:09,287 INFO L85 PathProgramCache]: Analyzing trace with hash -870723043, now seen corresponding path program 1 times [2024-06-27 23:38:09,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:09,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859435908] [2024-06-27 23:38:09,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:09,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:10,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:10,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859435908] [2024-06-27 23:38:10,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859435908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:10,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:10,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 23:38:10,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593570711] [2024-06-27 23:38:10,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:10,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 23:38:10,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 23:38:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 23:38:10,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 23:38:10,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 160 transitions, 1522 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:10,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:10,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 23:38:10,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:10,925 INFO L124 PetriNetUnfolderBase]: 1616/2726 cut-off events. [2024-06-27 23:38:10,926 INFO L125 PetriNetUnfolderBase]: For 30547/30585 co-relation queries the response was YES. [2024-06-27 23:38:10,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12478 conditions, 2726 events. 1616/2726 cut-off events. For 30547/30585 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15075 event pairs, 585 based on Foata normal form. 36/2726 useless extension candidates. Maximal degree in co-relation 12427. Up to 2344 conditions per place. [2024-06-27 23:38:10,944 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 129 selfloop transitions, 12 changer transitions 0/170 dead transitions. [2024-06-27 23:38:10,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 170 transitions, 1854 flow [2024-06-27 23:38:10,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 23:38:10,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 23:38:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-27 23:38:10,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2024-06-27 23:38:10,946 INFO L175 Difference]: Start difference. First operand has 113 places, 160 transitions, 1522 flow. Second operand 5 states and 111 transitions. [2024-06-27 23:38:10,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 170 transitions, 1854 flow [2024-06-27 23:38:10,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 170 transitions, 1813 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 23:38:10,975 INFO L231 Difference]: Finished difference. Result has 113 places, 163 transitions, 1542 flow [2024-06-27 23:38:10,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1542, PETRI_PLACES=113, PETRI_TRANSITIONS=163} [2024-06-27 23:38:10,976 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-27 23:38:10,976 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 163 transitions, 1542 flow [2024-06-27 23:38:10,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:10,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:10,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:10,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 23:38:10,977 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:10,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:10,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1598050868, now seen corresponding path program 1 times [2024-06-27 23:38:10,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:10,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180208404] [2024-06-27 23:38:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:10,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:12,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:12,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180208404] [2024-06-27 23:38:12,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180208404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:12,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:12,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:12,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598815421] [2024-06-27 23:38:12,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:12,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:12,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:12,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:12,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:12,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:12,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 163 transitions, 1542 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:12,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:12,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:12,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:13,737 INFO L124 PetriNetUnfolderBase]: 2053/3206 cut-off events. [2024-06-27 23:38:13,738 INFO L125 PetriNetUnfolderBase]: For 39186/39186 co-relation queries the response was YES. [2024-06-27 23:38:13,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15531 conditions, 3206 events. 2053/3206 cut-off events. For 39186/39186 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 16395 event pairs, 710 based on Foata normal form. 2/3199 useless extension candidates. Maximal degree in co-relation 15478. Up to 2932 conditions per place. [2024-06-27 23:38:13,759 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 132 selfloop transitions, 50 changer transitions 0/188 dead transitions. [2024-06-27 23:38:13,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 188 transitions, 2013 flow [2024-06-27 23:38:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:38:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:38:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 23:38:13,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-27 23:38:13,761 INFO L175 Difference]: Start difference. First operand has 113 places, 163 transitions, 1542 flow. Second operand 9 states and 174 transitions. [2024-06-27 23:38:13,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 188 transitions, 2013 flow [2024-06-27 23:38:13,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 188 transitions, 1978 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 23:38:13,792 INFO L231 Difference]: Finished difference. Result has 119 places, 166 transitions, 1652 flow [2024-06-27 23:38:13,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1652, PETRI_PLACES=119, PETRI_TRANSITIONS=166} [2024-06-27 23:38:13,792 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-06-27 23:38:13,793 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 166 transitions, 1652 flow [2024-06-27 23:38:13,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:13,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:13,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:13,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 23:38:13,794 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:13,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:13,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1601775518, now seen corresponding path program 2 times [2024-06-27 23:38:13,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:13,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924886815] [2024-06-27 23:38:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:13,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:15,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:15,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924886815] [2024-06-27 23:38:15,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924886815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:15,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:15,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:15,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049806362] [2024-06-27 23:38:15,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:15,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:15,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:15,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:15,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:15,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:15,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 166 transitions, 1652 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:15,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:15,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:15,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:16,388 INFO L124 PetriNetUnfolderBase]: 2118/3304 cut-off events. [2024-06-27 23:38:16,388 INFO L125 PetriNetUnfolderBase]: For 45756/45759 co-relation queries the response was YES. [2024-06-27 23:38:16,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16766 conditions, 3304 events. 2118/3304 cut-off events. For 45756/45759 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 16995 event pairs, 747 based on Foata normal form. 2/3293 useless extension candidates. Maximal degree in co-relation 16712. Up to 2773 conditions per place. [2024-06-27 23:38:16,410 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 108 selfloop transitions, 102 changer transitions 0/216 dead transitions. [2024-06-27 23:38:16,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 216 transitions, 2573 flow [2024-06-27 23:38:16,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:38:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:38:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-27 23:38:16,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971590909090909 [2024-06-27 23:38:16,412 INFO L175 Difference]: Start difference. First operand has 119 places, 166 transitions, 1652 flow. Second operand 8 states and 175 transitions. [2024-06-27 23:38:16,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 216 transitions, 2573 flow [2024-06-27 23:38:16,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 216 transitions, 2458 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 23:38:16,446 INFO L231 Difference]: Finished difference. Result has 121 places, 183 transitions, 1959 flow [2024-06-27 23:38:16,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1959, PETRI_PLACES=121, PETRI_TRANSITIONS=183} [2024-06-27 23:38:16,446 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-27 23:38:16,447 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 183 transitions, 1959 flow [2024-06-27 23:38:16,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:16,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:16,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:16,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 23:38:16,447 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:16,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:16,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1530293777, now seen corresponding path program 1 times [2024-06-27 23:38:16,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:16,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324193239] [2024-06-27 23:38:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:16,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:18,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:18,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324193239] [2024-06-27 23:38:18,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324193239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:18,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:18,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:18,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124304351] [2024-06-27 23:38:18,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:18,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:18,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:18,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:18,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 183 transitions, 1959 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:18,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:18,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:18,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:19,287 INFO L124 PetriNetUnfolderBase]: 2145/3357 cut-off events. [2024-06-27 23:38:19,287 INFO L125 PetriNetUnfolderBase]: For 52379/52385 co-relation queries the response was YES. [2024-06-27 23:38:19,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17827 conditions, 3357 events. 2145/3357 cut-off events. For 52379/52385 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 17376 event pairs, 718 based on Foata normal form. 4/3354 useless extension candidates. Maximal degree in co-relation 17770. Up to 2975 conditions per place. [2024-06-27 23:38:19,307 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 149 selfloop transitions, 64 changer transitions 0/219 dead transitions. [2024-06-27 23:38:19,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 219 transitions, 2719 flow [2024-06-27 23:38:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:38:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:38:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 23:38:19,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-27 23:38:19,308 INFO L175 Difference]: Start difference. First operand has 121 places, 183 transitions, 1959 flow. Second operand 8 states and 170 transitions. [2024-06-27 23:38:19,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 219 transitions, 2719 flow [2024-06-27 23:38:19,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 219 transitions, 2700 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 23:38:19,350 INFO L231 Difference]: Finished difference. Result has 128 places, 192 transitions, 2182 flow [2024-06-27 23:38:19,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2182, PETRI_PLACES=128, PETRI_TRANSITIONS=192} [2024-06-27 23:38:19,350 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 83 predicate places. [2024-06-27 23:38:19,350 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 192 transitions, 2182 flow [2024-06-27 23:38:19,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:19,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:19,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:19,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 23:38:19,351 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:19,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:19,351 INFO L85 PathProgramCache]: Analyzing trace with hash 213591438, now seen corresponding path program 3 times [2024-06-27 23:38:19,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:19,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730350208] [2024-06-27 23:38:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:19,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:21,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:21,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730350208] [2024-06-27 23:38:21,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730350208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:21,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:21,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:21,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302709581] [2024-06-27 23:38:21,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:21,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:21,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:21,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:21,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:21,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:21,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 192 transitions, 2182 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:21,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:21,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:21,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:21,995 INFO L124 PetriNetUnfolderBase]: 2140/3346 cut-off events. [2024-06-27 23:38:21,995 INFO L125 PetriNetUnfolderBase]: For 58375/58378 co-relation queries the response was YES. [2024-06-27 23:38:22,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18542 conditions, 3346 events. 2140/3346 cut-off events. For 58375/58378 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 17269 event pairs, 729 based on Foata normal form. 2/3335 useless extension candidates. Maximal degree in co-relation 18481. Up to 2807 conditions per place. [2024-06-27 23:38:22,018 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 117 selfloop transitions, 99 changer transitions 0/222 dead transitions. [2024-06-27 23:38:22,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 222 transitions, 2885 flow [2024-06-27 23:38:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:38:22,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:38:22,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-27 23:38:22,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2024-06-27 23:38:22,021 INFO L175 Difference]: Start difference. First operand has 128 places, 192 transitions, 2182 flow. Second operand 8 states and 174 transitions. [2024-06-27 23:38:22,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 222 transitions, 2885 flow [2024-06-27 23:38:22,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 222 transitions, 2807 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 23:38:22,071 INFO L231 Difference]: Finished difference. Result has 132 places, 192 transitions, 2312 flow [2024-06-27 23:38:22,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2312, PETRI_PLACES=132, PETRI_TRANSITIONS=192} [2024-06-27 23:38:22,072 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 87 predicate places. [2024-06-27 23:38:22,072 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 192 transitions, 2312 flow [2024-06-27 23:38:22,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:22,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:22,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:22,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 23:38:22,073 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:22,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:22,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1341828049, now seen corresponding path program 2 times [2024-06-27 23:38:22,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:22,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046516546] [2024-06-27 23:38:22,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:22,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:23,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:23,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046516546] [2024-06-27 23:38:23,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046516546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:23,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:23,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:23,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506722344] [2024-06-27 23:38:23,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:23,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:23,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:23,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:23,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:23,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:23,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 192 transitions, 2312 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:23,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:23,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:23,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:24,920 INFO L124 PetriNetUnfolderBase]: 2151/3365 cut-off events. [2024-06-27 23:38:24,920 INFO L125 PetriNetUnfolderBase]: For 63631/63637 co-relation queries the response was YES. [2024-06-27 23:38:24,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19158 conditions, 3365 events. 2151/3365 cut-off events. For 63631/63637 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 17433 event pairs, 690 based on Foata normal form. 6/3364 useless extension candidates. Maximal degree in co-relation 19094. Up to 2980 conditions per place. [2024-06-27 23:38:24,942 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 139 selfloop transitions, 75 changer transitions 0/220 dead transitions. [2024-06-27 23:38:24,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 220 transitions, 2961 flow [2024-06-27 23:38:24,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:38:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:38:24,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 23:38:24,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 23:38:24,944 INFO L175 Difference]: Start difference. First operand has 132 places, 192 transitions, 2312 flow. Second operand 8 states and 164 transitions. [2024-06-27 23:38:24,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 220 transitions, 2961 flow [2024-06-27 23:38:24,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 220 transitions, 2757 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 23:38:24,988 INFO L231 Difference]: Finished difference. Result has 135 places, 195 transitions, 2306 flow [2024-06-27 23:38:24,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2306, PETRI_PLACES=135, PETRI_TRANSITIONS=195} [2024-06-27 23:38:24,989 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-27 23:38:24,989 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 195 transitions, 2306 flow [2024-06-27 23:38:24,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:24,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:24,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:24,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 23:38:24,990 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:24,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:24,990 INFO L85 PathProgramCache]: Analyzing trace with hash -326832303, now seen corresponding path program 3 times [2024-06-27 23:38:24,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:24,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844570916] [2024-06-27 23:38:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:24,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:26,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:26,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844570916] [2024-06-27 23:38:26,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844570916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:26,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:26,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:26,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658458830] [2024-06-27 23:38:26,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:26,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:26,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:26,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:26,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:26,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:26,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 195 transitions, 2306 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:26,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:26,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:26,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:27,687 INFO L124 PetriNetUnfolderBase]: 2162/3372 cut-off events. [2024-06-27 23:38:27,687 INFO L125 PetriNetUnfolderBase]: For 68513/68519 co-relation queries the response was YES. [2024-06-27 23:38:27,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19456 conditions, 3372 events. 2162/3372 cut-off events. For 68513/68519 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 17332 event pairs, 695 based on Foata normal form. 6/3371 useless extension candidates. Maximal degree in co-relation 19389. Up to 2992 conditions per place. [2024-06-27 23:38:27,713 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 146 selfloop transitions, 72 changer transitions 0/224 dead transitions. [2024-06-27 23:38:27,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 224 transitions, 2980 flow [2024-06-27 23:38:27,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:38:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:38:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 23:38:27,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 23:38:27,715 INFO L175 Difference]: Start difference. First operand has 135 places, 195 transitions, 2306 flow. Second operand 8 states and 165 transitions. [2024-06-27 23:38:27,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 224 transitions, 2980 flow [2024-06-27 23:38:27,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 224 transitions, 2841 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 23:38:27,772 INFO L231 Difference]: Finished difference. Result has 139 places, 198 transitions, 2366 flow [2024-06-27 23:38:27,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2178, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2366, PETRI_PLACES=139, PETRI_TRANSITIONS=198} [2024-06-27 23:38:27,772 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-27 23:38:27,774 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 198 transitions, 2366 flow [2024-06-27 23:38:27,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:27,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:27,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:27,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 23:38:27,776 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:27,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:27,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1745660468, now seen corresponding path program 4 times [2024-06-27 23:38:27,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:27,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139611134] [2024-06-27 23:38:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:27,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:29,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:29,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139611134] [2024-06-27 23:38:29,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139611134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:29,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:29,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:29,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614068144] [2024-06-27 23:38:29,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:29,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:29,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:29,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:29,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:29,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:29,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 198 transitions, 2366 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:29,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:29,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:29,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:30,565 INFO L124 PetriNetUnfolderBase]: 2173/3392 cut-off events. [2024-06-27 23:38:30,565 INFO L125 PetriNetUnfolderBase]: For 74443/74443 co-relation queries the response was YES. [2024-06-27 23:38:30,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19804 conditions, 3392 events. 2173/3392 cut-off events. For 74443/74443 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 17458 event pairs, 704 based on Foata normal form. 2/3381 useless extension candidates. Maximal degree in co-relation 19734. Up to 2851 conditions per place. [2024-06-27 23:38:30,590 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 116 selfloop transitions, 106 changer transitions 0/228 dead transitions. [2024-06-27 23:38:30,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 228 transitions, 3126 flow [2024-06-27 23:38:30,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:38:30,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:38:30,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 23:38:30,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-27 23:38:30,591 INFO L175 Difference]: Start difference. First operand has 139 places, 198 transitions, 2366 flow. Second operand 8 states and 170 transitions. [2024-06-27 23:38:30,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 228 transitions, 3126 flow [2024-06-27 23:38:30,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 228 transitions, 3011 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 23:38:30,662 INFO L231 Difference]: Finished difference. Result has 144 places, 202 transitions, 2534 flow [2024-06-27 23:38:30,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2251, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2534, PETRI_PLACES=144, PETRI_TRANSITIONS=202} [2024-06-27 23:38:30,663 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 99 predicate places. [2024-06-27 23:38:30,663 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 202 transitions, 2534 flow [2024-06-27 23:38:30,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:30,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:30,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:30,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 23:38:30,663 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:30,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:30,664 INFO L85 PathProgramCache]: Analyzing trace with hash -334184170, now seen corresponding path program 5 times [2024-06-27 23:38:30,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:30,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235629581] [2024-06-27 23:38:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:30,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:32,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:32,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235629581] [2024-06-27 23:38:32,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235629581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:32,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:32,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:32,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830724805] [2024-06-27 23:38:32,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:32,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:32,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:32,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:32,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 202 transitions, 2534 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:32,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:32,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:32,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:33,298 INFO L124 PetriNetUnfolderBase]: 2184/3416 cut-off events. [2024-06-27 23:38:33,298 INFO L125 PetriNetUnfolderBase]: For 80546/80546 co-relation queries the response was YES. [2024-06-27 23:38:33,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20352 conditions, 3416 events. 2184/3416 cut-off events. For 80546/80546 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 17691 event pairs, 696 based on Foata normal form. 2/3405 useless extension candidates. Maximal degree in co-relation 20278. Up to 2863 conditions per place. [2024-06-27 23:38:33,326 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 121 selfloop transitions, 106 changer transitions 0/233 dead transitions. [2024-06-27 23:38:33,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 233 transitions, 3331 flow [2024-06-27 23:38:33,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:38:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:38:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-27 23:38:33,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48579545454545453 [2024-06-27 23:38:33,327 INFO L175 Difference]: Start difference. First operand has 144 places, 202 transitions, 2534 flow. Second operand 8 states and 171 transitions. [2024-06-27 23:38:33,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 233 transitions, 3331 flow [2024-06-27 23:38:33,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 233 transitions, 3162 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 23:38:33,398 INFO L231 Difference]: Finished difference. Result has 148 places, 205 transitions, 2637 flow [2024-06-27 23:38:33,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2637, PETRI_PLACES=148, PETRI_TRANSITIONS=205} [2024-06-27 23:38:33,399 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-27 23:38:33,399 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 205 transitions, 2637 flow [2024-06-27 23:38:33,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:33,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:33,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:33,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 23:38:33,400 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:33,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:33,400 INFO L85 PathProgramCache]: Analyzing trace with hash -326832520, now seen corresponding path program 6 times [2024-06-27 23:38:33,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:33,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267106924] [2024-06-27 23:38:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:33,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:35,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:35,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267106924] [2024-06-27 23:38:35,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267106924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:35,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:35,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:35,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791498589] [2024-06-27 23:38:35,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:35,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:35,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:35,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:35,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:35,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 205 transitions, 2637 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:35,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:35,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:35,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:36,245 INFO L124 PetriNetUnfolderBase]: 2179/3408 cut-off events. [2024-06-27 23:38:36,245 INFO L125 PetriNetUnfolderBase]: For 85975/85975 co-relation queries the response was YES. [2024-06-27 23:38:36,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20545 conditions, 3408 events. 2179/3408 cut-off events. For 85975/85975 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 17641 event pairs, 693 based on Foata normal form. 2/3397 useless extension candidates. Maximal degree in co-relation 20468. Up to 2858 conditions per place. [2024-06-27 23:38:36,270 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 105 selfloop transitions, 119 changer transitions 0/230 dead transitions. [2024-06-27 23:38:36,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 230 transitions, 3281 flow [2024-06-27 23:38:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:38:36,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:38:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 23:38:36,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-27 23:38:36,272 INFO L175 Difference]: Start difference. First operand has 148 places, 205 transitions, 2637 flow. Second operand 8 states and 167 transitions. [2024-06-27 23:38:36,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 230 transitions, 3281 flow [2024-06-27 23:38:36,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 230 transitions, 3011 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 23:38:36,361 INFO L231 Difference]: Finished difference. Result has 151 places, 205 transitions, 2616 flow [2024-06-27 23:38:36,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2367, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2616, PETRI_PLACES=151, PETRI_TRANSITIONS=205} [2024-06-27 23:38:36,361 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-27 23:38:36,361 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 205 transitions, 2616 flow [2024-06-27 23:38:36,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:36,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:36,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:36,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 23:38:36,362 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:36,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash -334183953, now seen corresponding path program 4 times [2024-06-27 23:38:36,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:36,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148587395] [2024-06-27 23:38:36,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:36,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:38,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:38,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148587395] [2024-06-27 23:38:38,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148587395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:38,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:38,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:38,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227069461] [2024-06-27 23:38:38,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:38,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:38,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:38,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:38,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:38,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:38,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 205 transitions, 2616 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:38,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:38,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:38,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:39,189 INFO L124 PetriNetUnfolderBase]: 2174/3405 cut-off events. [2024-06-27 23:38:39,190 INFO L125 PetriNetUnfolderBase]: For 91181/91187 co-relation queries the response was YES. [2024-06-27 23:38:39,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20735 conditions, 3405 events. 2174/3405 cut-off events. For 91181/91187 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 17665 event pairs, 693 based on Foata normal form. 6/3404 useless extension candidates. Maximal degree in co-relation 20655. Up to 3012 conditions per place. [2024-06-27 23:38:39,217 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 155 selfloop transitions, 69 changer transitions 0/230 dead transitions. [2024-06-27 23:38:39,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 230 transitions, 3264 flow [2024-06-27 23:38:39,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:38:39,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:38:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 23:38:39,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 23:38:39,219 INFO L175 Difference]: Start difference. First operand has 151 places, 205 transitions, 2616 flow. Second operand 8 states and 166 transitions. [2024-06-27 23:38:39,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 230 transitions, 3264 flow [2024-06-27 23:38:39,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 230 transitions, 3068 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 23:38:39,318 INFO L231 Difference]: Finished difference. Result has 154 places, 205 transitions, 2569 flow [2024-06-27 23:38:39,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2420, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2569, PETRI_PLACES=154, PETRI_TRANSITIONS=205} [2024-06-27 23:38:39,319 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-27 23:38:39,319 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 205 transitions, 2569 flow [2024-06-27 23:38:39,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:39,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:39,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:39,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 23:38:39,320 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:39,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:39,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1058300716, now seen corresponding path program 7 times [2024-06-27 23:38:39,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:39,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063026632] [2024-06-27 23:38:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:39,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:40,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:40,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063026632] [2024-06-27 23:38:40,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063026632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:40,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:40,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:40,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318051215] [2024-06-27 23:38:40,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:40,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:40,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:40,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:40,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:41,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:41,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 205 transitions, 2569 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:41,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:41,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:41,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:41,871 INFO L124 PetriNetUnfolderBase]: 2192/3430 cut-off events. [2024-06-27 23:38:41,871 INFO L125 PetriNetUnfolderBase]: For 97202/97204 co-relation queries the response was YES. [2024-06-27 23:38:41,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20997 conditions, 3430 events. 2192/3430 cut-off events. For 97202/97204 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 17780 event pairs, 683 based on Foata normal form. 4/3431 useless extension candidates. Maximal degree in co-relation 20915. Up to 3132 conditions per place. [2024-06-27 23:38:41,898 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 178 selfloop transitions, 55 changer transitions 0/239 dead transitions. [2024-06-27 23:38:41,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 239 transitions, 3204 flow [2024-06-27 23:38:41,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:38:41,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:38:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 23:38:41,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-27 23:38:41,899 INFO L175 Difference]: Start difference. First operand has 154 places, 205 transitions, 2569 flow. Second operand 9 states and 181 transitions. [2024-06-27 23:38:41,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 239 transitions, 3204 flow [2024-06-27 23:38:41,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 239 transitions, 3074 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 23:38:41,997 INFO L231 Difference]: Finished difference. Result has 157 places, 211 transitions, 2641 flow [2024-06-27 23:38:41,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2641, PETRI_PLACES=157, PETRI_TRANSITIONS=211} [2024-06-27 23:38:41,998 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 112 predicate places. [2024-06-27 23:38:41,998 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 211 transitions, 2641 flow [2024-06-27 23:38:41,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:41,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:41,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:41,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 23:38:41,999 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:41,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:41,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1585482794, now seen corresponding path program 8 times [2024-06-27 23:38:41,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:41,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843888914] [2024-06-27 23:38:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:42,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:43,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:43,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843888914] [2024-06-27 23:38:43,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843888914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:43,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:43,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:43,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992449983] [2024-06-27 23:38:43,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:43,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:43,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:43,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:43,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:43,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:43,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 211 transitions, 2641 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:43,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:43,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:43,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:44,567 INFO L124 PetriNetUnfolderBase]: 2231/3488 cut-off events. [2024-06-27 23:38:44,567 INFO L125 PetriNetUnfolderBase]: For 104676/104678 co-relation queries the response was YES. [2024-06-27 23:38:44,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21568 conditions, 3488 events. 2231/3488 cut-off events. For 104676/104678 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 18105 event pairs, 683 based on Foata normal form. 4/3489 useless extension candidates. Maximal degree in co-relation 21485. Up to 3103 conditions per place. [2024-06-27 23:38:44,595 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 171 selfloop transitions, 97 changer transitions 0/274 dead transitions. [2024-06-27 23:38:44,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 274 transitions, 3579 flow [2024-06-27 23:38:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 23:38:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 23:38:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 272 transitions. [2024-06-27 23:38:44,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-27 23:38:44,597 INFO L175 Difference]: Start difference. First operand has 157 places, 211 transitions, 2641 flow. Second operand 14 states and 272 transitions. [2024-06-27 23:38:44,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 274 transitions, 3579 flow [2024-06-27 23:38:44,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 274 transitions, 3419 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 23:38:44,694 INFO L231 Difference]: Finished difference. Result has 165 places, 227 transitions, 2939 flow [2024-06-27 23:38:44,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2939, PETRI_PLACES=165, PETRI_TRANSITIONS=227} [2024-06-27 23:38:44,695 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 120 predicate places. [2024-06-27 23:38:44,695 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 227 transitions, 2939 flow [2024-06-27 23:38:44,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:44,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:44,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:44,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 23:38:44,696 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:44,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:44,696 INFO L85 PathProgramCache]: Analyzing trace with hash -864014292, now seen corresponding path program 9 times [2024-06-27 23:38:44,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:44,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308579586] [2024-06-27 23:38:44,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:44,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:46,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:46,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308579586] [2024-06-27 23:38:46,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308579586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:46,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:46,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:46,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398508947] [2024-06-27 23:38:46,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:46,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:46,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:46,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:46,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:46,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:46,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 227 transitions, 2939 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:46,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:46,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:46,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:47,409 INFO L124 PetriNetUnfolderBase]: 2312/3622 cut-off events. [2024-06-27 23:38:47,410 INFO L125 PetriNetUnfolderBase]: For 113707/113710 co-relation queries the response was YES. [2024-06-27 23:38:47,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22658 conditions, 3622 events. 2312/3622 cut-off events. For 113707/113710 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 18929 event pairs, 702 based on Foata normal form. 2/3620 useless extension candidates. Maximal degree in co-relation 22573. Up to 2998 conditions per place. [2024-06-27 23:38:47,437 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 126 selfloop transitions, 163 changer transitions 0/295 dead transitions. [2024-06-27 23:38:47,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 295 transitions, 4163 flow [2024-06-27 23:38:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:38:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:38:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 23:38:47,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2024-06-27 23:38:47,439 INFO L175 Difference]: Start difference. First operand has 165 places, 227 transitions, 2939 flow. Second operand 9 states and 191 transitions. [2024-06-27 23:38:47,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 295 transitions, 4163 flow [2024-06-27 23:38:47,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 295 transitions, 3969 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-27 23:38:47,550 INFO L231 Difference]: Finished difference. Result has 166 places, 261 transitions, 3516 flow [2024-06-27 23:38:47,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2763, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3516, PETRI_PLACES=166, PETRI_TRANSITIONS=261} [2024-06-27 23:38:47,551 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 121 predicate places. [2024-06-27 23:38:47,551 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 261 transitions, 3516 flow [2024-06-27 23:38:47,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:47,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:47,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:47,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 23:38:47,552 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:47,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:47,552 INFO L85 PathProgramCache]: Analyzing trace with hash -503835305, now seen corresponding path program 5 times [2024-06-27 23:38:47,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:47,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785514594] [2024-06-27 23:38:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:47,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:48,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:48,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785514594] [2024-06-27 23:38:48,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785514594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:48,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:48,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:49,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072385669] [2024-06-27 23:38:49,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:49,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:49,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:49,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:49,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:49,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:49,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 261 transitions, 3516 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:49,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:49,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:49,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:50,226 INFO L124 PetriNetUnfolderBase]: 2342/3674 cut-off events. [2024-06-27 23:38:50,226 INFO L125 PetriNetUnfolderBase]: For 121206/121211 co-relation queries the response was YES. [2024-06-27 23:38:50,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23481 conditions, 3674 events. 2342/3674 cut-off events. For 121206/121211 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 19304 event pairs, 713 based on Foata normal form. 4/3674 useless extension candidates. Maximal degree in co-relation 23393. Up to 3245 conditions per place. [2024-06-27 23:38:50,260 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 214 selfloop transitions, 87 changer transitions 0/307 dead transitions. [2024-06-27 23:38:50,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 307 transitions, 4433 flow [2024-06-27 23:38:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:38:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:38:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 23:38:50,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 23:38:50,261 INFO L175 Difference]: Start difference. First operand has 166 places, 261 transitions, 3516 flow. Second operand 9 states and 187 transitions. [2024-06-27 23:38:50,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 307 transitions, 4433 flow [2024-06-27 23:38:50,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 307 transitions, 4008 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-27 23:38:50,429 INFO L231 Difference]: Finished difference. Result has 170 places, 277 transitions, 3481 flow [2024-06-27 23:38:50,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3115, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3481, PETRI_PLACES=170, PETRI_TRANSITIONS=277} [2024-06-27 23:38:50,430 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 125 predicate places. [2024-06-27 23:38:50,430 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 277 transitions, 3481 flow [2024-06-27 23:38:50,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:50,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:50,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:50,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 23:38:50,431 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:50,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash -864008712, now seen corresponding path program 10 times [2024-06-27 23:38:50,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:50,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370563365] [2024-06-27 23:38:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:50,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:51,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:51,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370563365] [2024-06-27 23:38:51,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370563365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:51,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:51,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:51,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094855415] [2024-06-27 23:38:51,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:51,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:51,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:51,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:51,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:51,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:38:51,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 277 transitions, 3481 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:51,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:51,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:38:51,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:52,920 INFO L124 PetriNetUnfolderBase]: 2337/3663 cut-off events. [2024-06-27 23:38:52,921 INFO L125 PetriNetUnfolderBase]: For 126557/126560 co-relation queries the response was YES. [2024-06-27 23:38:52,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23331 conditions, 3663 events. 2337/3663 cut-off events. For 126557/126560 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 19262 event pairs, 697 based on Foata normal form. 2/3661 useless extension candidates. Maximal degree in co-relation 23242. Up to 3036 conditions per place. [2024-06-27 23:38:52,955 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 134 selfloop transitions, 169 changer transitions 0/309 dead transitions. [2024-06-27 23:38:52,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 309 transitions, 4271 flow [2024-06-27 23:38:52,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:38:52,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:38:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 23:38:52,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-27 23:38:52,957 INFO L175 Difference]: Start difference. First operand has 170 places, 277 transitions, 3481 flow. Second operand 9 states and 188 transitions. [2024-06-27 23:38:52,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 309 transitions, 4271 flow [2024-06-27 23:38:53,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 309 transitions, 4095 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 23:38:53,143 INFO L231 Difference]: Finished difference. Result has 174 places, 277 transitions, 3655 flow [2024-06-27 23:38:53,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3305, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3655, PETRI_PLACES=174, PETRI_TRANSITIONS=277} [2024-06-27 23:38:53,144 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-27 23:38:53,144 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 277 transitions, 3655 flow [2024-06-27 23:38:53,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:53,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:53,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:53,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 23:38:53,145 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:53,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:53,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1222608917, now seen corresponding path program 1 times [2024-06-27 23:38:53,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:53,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104443585] [2024-06-27 23:38:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:53,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:54,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:54,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104443585] [2024-06-27 23:38:54,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104443585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:54,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:54,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:38:54,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380234240] [2024-06-27 23:38:54,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:54,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:38:54,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:54,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:38:54,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:38:54,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:38:54,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 277 transitions, 3655 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:54,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:54,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:38:54,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:55,240 INFO L124 PetriNetUnfolderBase]: 2308/3613 cut-off events. [2024-06-27 23:38:55,241 INFO L125 PetriNetUnfolderBase]: For 154793/154819 co-relation queries the response was YES. [2024-06-27 23:38:55,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24076 conditions, 3613 events. 2308/3613 cut-off events. For 154793/154819 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 19141 event pairs, 797 based on Foata normal form. 21/3600 useless extension candidates. Maximal degree in co-relation 23986. Up to 3303 conditions per place. [2024-06-27 23:38:55,271 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 224 selfloop transitions, 15 changer transitions 0/288 dead transitions. [2024-06-27 23:38:55,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 288 transitions, 4189 flow [2024-06-27 23:38:55,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:38:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:38:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 23:38:55,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2024-06-27 23:38:55,273 INFO L175 Difference]: Start difference. First operand has 174 places, 277 transitions, 3655 flow. Second operand 6 states and 119 transitions. [2024-06-27 23:38:55,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 288 transitions, 4189 flow [2024-06-27 23:38:55,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 288 transitions, 3894 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 23:38:55,477 INFO L231 Difference]: Finished difference. Result has 174 places, 280 transitions, 3428 flow [2024-06-27 23:38:55,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3428, PETRI_PLACES=174, PETRI_TRANSITIONS=280} [2024-06-27 23:38:55,478 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-27 23:38:55,478 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 280 transitions, 3428 flow [2024-06-27 23:38:55,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:55,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:55,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:55,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 23:38:55,479 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:55,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:55,479 INFO L85 PathProgramCache]: Analyzing trace with hash -312738055, now seen corresponding path program 1 times [2024-06-27 23:38:55,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:55,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540396465] [2024-06-27 23:38:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:55,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:38:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:38:57,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:38:57,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540396465] [2024-06-27 23:38:57,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540396465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:38:57,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:38:57,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:38:57,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645678800] [2024-06-27 23:38:57,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:38:57,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:38:57,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:38:57,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:38:57,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:38:57,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:38:57,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 280 transitions, 3428 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:57,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:38:57,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:38:57,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:38:58,532 INFO L124 PetriNetUnfolderBase]: 2308/3640 cut-off events. [2024-06-27 23:38:58,532 INFO L125 PetriNetUnfolderBase]: For 165667/165684 co-relation queries the response was YES. [2024-06-27 23:38:58,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24866 conditions, 3640 events. 2308/3640 cut-off events. For 165667/165684 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 19571 event pairs, 667 based on Foata normal form. 7/3604 useless extension candidates. Maximal degree in co-relation 24775. Up to 3169 conditions per place. [2024-06-27 23:38:58,570 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 216 selfloop transitions, 49 changer transitions 0/304 dead transitions. [2024-06-27 23:38:58,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 304 transitions, 4076 flow [2024-06-27 23:38:58,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:38:58,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:38:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 23:38:58,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-27 23:38:58,572 INFO L175 Difference]: Start difference. First operand has 174 places, 280 transitions, 3428 flow. Second operand 9 states and 182 transitions. [2024-06-27 23:38:58,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 304 transitions, 4076 flow [2024-06-27 23:38:58,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 304 transitions, 4032 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 23:38:58,777 INFO L231 Difference]: Finished difference. Result has 179 places, 282 transitions, 3534 flow [2024-06-27 23:38:58,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3534, PETRI_PLACES=179, PETRI_TRANSITIONS=282} [2024-06-27 23:38:58,778 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 134 predicate places. [2024-06-27 23:38:58,778 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 282 transitions, 3534 flow [2024-06-27 23:38:58,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:38:58,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:38:58,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:38:58,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 23:38:58,778 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:38:58,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:38:58,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1728238729, now seen corresponding path program 2 times [2024-06-27 23:38:58,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:38:58,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440706803] [2024-06-27 23:38:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:38:58,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:38:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:00,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:00,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440706803] [2024-06-27 23:39:00,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440706803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:00,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:00,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:39:00,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840471042] [2024-06-27 23:39:00,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:00,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:39:00,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:00,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:39:00,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:39:00,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:39:00,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 282 transitions, 3534 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:00,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:00,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:39:00,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:02,076 INFO L124 PetriNetUnfolderBase]: 2340/3702 cut-off events. [2024-06-27 23:39:02,077 INFO L125 PetriNetUnfolderBase]: For 172854/172857 co-relation queries the response was YES. [2024-06-27 23:39:02,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25527 conditions, 3702 events. 2340/3702 cut-off events. For 172854/172857 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 19831 event pairs, 738 based on Foata normal form. 7/3694 useless extension candidates. Maximal degree in co-relation 25435. Up to 3177 conditions per place. [2024-06-27 23:39:02,104 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 222 selfloop transitions, 53 changer transitions 0/314 dead transitions. [2024-06-27 23:39:02,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 314 transitions, 4240 flow [2024-06-27 23:39:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:39:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:39:02,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 23:39:02,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-27 23:39:02,107 INFO L175 Difference]: Start difference. First operand has 179 places, 282 transitions, 3534 flow. Second operand 10 states and 203 transitions. [2024-06-27 23:39:02,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 314 transitions, 4240 flow [2024-06-27 23:39:02,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 314 transitions, 4114 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 23:39:02,290 INFO L231 Difference]: Finished difference. Result has 183 places, 286 transitions, 3590 flow [2024-06-27 23:39:02,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3590, PETRI_PLACES=183, PETRI_TRANSITIONS=286} [2024-06-27 23:39:02,291 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 138 predicate places. [2024-06-27 23:39:02,291 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 286 transitions, 3590 flow [2024-06-27 23:39:02,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:02,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:02,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:02,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 23:39:02,292 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:02,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:02,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1728361799, now seen corresponding path program 1 times [2024-06-27 23:39:02,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:02,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887726728] [2024-06-27 23:39:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:02,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:04,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:04,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:04,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887726728] [2024-06-27 23:39:04,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887726728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:04,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:04,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:04,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537174785] [2024-06-27 23:39:04,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:04,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:04,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:04,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:04,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:04,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:04,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 286 transitions, 3590 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:04,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:04,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:04,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:05,266 INFO L124 PetriNetUnfolderBase]: 2466/3838 cut-off events. [2024-06-27 23:39:05,267 INFO L125 PetriNetUnfolderBase]: For 181832/181832 co-relation queries the response was YES. [2024-06-27 23:39:05,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26847 conditions, 3838 events. 2466/3838 cut-off events. For 181832/181832 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20087 event pairs, 637 based on Foata normal form. 2/3831 useless extension candidates. Maximal degree in co-relation 26753. Up to 3484 conditions per place. [2024-06-27 23:39:05,299 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 244 selfloop transitions, 62 changer transitions 0/313 dead transitions. [2024-06-27 23:39:05,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 313 transitions, 4330 flow [2024-06-27 23:39:05,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:39:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:39:05,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:39:05,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-27 23:39:05,305 INFO L175 Difference]: Start difference. First operand has 183 places, 286 transitions, 3590 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:39:05,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 313 transitions, 4330 flow [2024-06-27 23:39:05,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 313 transitions, 4200 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 23:39:05,502 INFO L231 Difference]: Finished difference. Result has 186 places, 289 transitions, 3643 flow [2024-06-27 23:39:05,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3643, PETRI_PLACES=186, PETRI_TRANSITIONS=289} [2024-06-27 23:39:05,503 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-27 23:39:05,503 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 289 transitions, 3643 flow [2024-06-27 23:39:05,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:05,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:05,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:05,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 23:39:05,503 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:05,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:05,504 INFO L85 PathProgramCache]: Analyzing trace with hash -194645415, now seen corresponding path program 2 times [2024-06-27 23:39:05,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:05,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234478988] [2024-06-27 23:39:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:07,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:07,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234478988] [2024-06-27 23:39:07,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234478988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:07,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:07,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:07,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109904566] [2024-06-27 23:39:07,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:07,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:07,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:07,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:07,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:07,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:07,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 289 transitions, 3643 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:07,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:07,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:07,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:08,838 INFO L124 PetriNetUnfolderBase]: 2509/3906 cut-off events. [2024-06-27 23:39:08,838 INFO L125 PetriNetUnfolderBase]: For 195431/195434 co-relation queries the response was YES. [2024-06-27 23:39:08,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27925 conditions, 3906 events. 2509/3906 cut-off events. For 195431/195434 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 20654 event pairs, 737 based on Foata normal form. 2/3894 useless extension candidates. Maximal degree in co-relation 27830. Up to 3036 conditions per place. [2024-06-27 23:39:08,871 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 160 selfloop transitions, 170 changer transitions 0/337 dead transitions. [2024-06-27 23:39:08,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 337 transitions, 5075 flow [2024-06-27 23:39:08,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:08,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-27 23:39:08,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 23:39:08,873 INFO L175 Difference]: Start difference. First operand has 186 places, 289 transitions, 3643 flow. Second operand 9 states and 198 transitions. [2024-06-27 23:39:08,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 337 transitions, 5075 flow [2024-06-27 23:39:09,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 337 transitions, 4922 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 23:39:09,065 INFO L231 Difference]: Finished difference. Result has 187 places, 301 transitions, 4040 flow [2024-06-27 23:39:09,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4040, PETRI_PLACES=187, PETRI_TRANSITIONS=301} [2024-06-27 23:39:09,066 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 142 predicate places. [2024-06-27 23:39:09,066 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 301 transitions, 4040 flow [2024-06-27 23:39:09,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:09,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:09,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:09,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 23:39:09,067 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:09,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:09,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1884565371, now seen corresponding path program 3 times [2024-06-27 23:39:09,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:09,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493705076] [2024-06-27 23:39:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:09,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:11,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:11,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493705076] [2024-06-27 23:39:11,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493705076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:11,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:11,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:11,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399835282] [2024-06-27 23:39:11,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:11,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:11,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:11,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:11,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:11,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:11,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 301 transitions, 4040 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:11,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:11,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:11,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:12,445 INFO L124 PetriNetUnfolderBase]: 2520/3926 cut-off events. [2024-06-27 23:39:12,445 INFO L125 PetriNetUnfolderBase]: For 208812/208815 co-relation queries the response was YES. [2024-06-27 23:39:12,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28958 conditions, 3926 events. 2520/3926 cut-off events. For 208812/208815 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20812 event pairs, 737 based on Foata normal form. 2/3914 useless extension candidates. Maximal degree in co-relation 28861. Up to 3048 conditions per place. [2024-06-27 23:39:12,482 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 159 selfloop transitions, 176 changer transitions 0/342 dead transitions. [2024-06-27 23:39:12,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 342 transitions, 5382 flow [2024-06-27 23:39:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 23:39:12,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-27 23:39:12,484 INFO L175 Difference]: Start difference. First operand has 187 places, 301 transitions, 4040 flow. Second operand 9 states and 197 transitions. [2024-06-27 23:39:12,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 342 transitions, 5382 flow [2024-06-27 23:39:12,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 342 transitions, 5288 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 23:39:12,703 INFO L231 Difference]: Finished difference. Result has 193 places, 304 transitions, 4364 flow [2024-06-27 23:39:12,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3952, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4364, PETRI_PLACES=193, PETRI_TRANSITIONS=304} [2024-06-27 23:39:12,703 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 148 predicate places. [2024-06-27 23:39:12,703 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 304 transitions, 4364 flow [2024-06-27 23:39:12,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:12,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:12,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:12,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 23:39:12,704 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:12,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:12,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1884558613, now seen corresponding path program 1 times [2024-06-27 23:39:12,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:12,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957097883] [2024-06-27 23:39:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:12,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:14,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:14,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957097883] [2024-06-27 23:39:14,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957097883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:14,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:14,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:14,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548245015] [2024-06-27 23:39:14,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:14,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:14,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:14,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:14,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:14,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:14,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 304 transitions, 4364 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:14,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:14,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:14,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:15,972 INFO L124 PetriNetUnfolderBase]: 2552/3987 cut-off events. [2024-06-27 23:39:15,972 INFO L125 PetriNetUnfolderBase]: For 223875/223881 co-relation queries the response was YES. [2024-06-27 23:39:15,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30038 conditions, 3987 events. 2552/3987 cut-off events. For 223875/223881 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 21236 event pairs, 686 based on Foata normal form. 5/3985 useless extension candidates. Maximal degree in co-relation 29938. Up to 3455 conditions per place. [2024-06-27 23:39:16,012 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 249 selfloop transitions, 92 changer transitions 0/348 dead transitions. [2024-06-27 23:39:16,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 348 transitions, 5619 flow [2024-06-27 23:39:16,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:39:16,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:39:16,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 23:39:16,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-27 23:39:16,015 INFO L175 Difference]: Start difference. First operand has 193 places, 304 transitions, 4364 flow. Second operand 10 states and 206 transitions. [2024-06-27 23:39:16,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 348 transitions, 5619 flow [2024-06-27 23:39:16,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 348 transitions, 5348 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 23:39:16,275 INFO L231 Difference]: Finished difference. Result has 200 places, 316 transitions, 4453 flow [2024-06-27 23:39:16,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4093, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4453, PETRI_PLACES=200, PETRI_TRANSITIONS=316} [2024-06-27 23:39:16,276 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 155 predicate places. [2024-06-27 23:39:16,276 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 316 transitions, 4453 flow [2024-06-27 23:39:16,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:16,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:16,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:16,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 23:39:16,276 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:16,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:16,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1884558861, now seen corresponding path program 4 times [2024-06-27 23:39:16,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:16,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387720733] [2024-06-27 23:39:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:16,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:18,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:18,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387720733] [2024-06-27 23:39:18,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387720733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:18,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:18,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:18,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462668360] [2024-06-27 23:39:18,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:18,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:18,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:18,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:18,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:18,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:18,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 316 transitions, 4453 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:18,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:18,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:18,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:19,498 INFO L124 PetriNetUnfolderBase]: 2547/3978 cut-off events. [2024-06-27 23:39:19,498 INFO L125 PetriNetUnfolderBase]: For 242566/242569 co-relation queries the response was YES. [2024-06-27 23:39:19,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30664 conditions, 3978 events. 2547/3978 cut-off events. For 242566/242569 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 21154 event pairs, 716 based on Foata normal form. 2/3966 useless extension candidates. Maximal degree in co-relation 30560. Up to 3089 conditions per place. [2024-06-27 23:39:19,537 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 160 selfloop transitions, 183 changer transitions 0/350 dead transitions. [2024-06-27 23:39:19,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 350 transitions, 5610 flow [2024-06-27 23:39:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:19,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-27 23:39:19,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2024-06-27 23:39:19,539 INFO L175 Difference]: Start difference. First operand has 200 places, 316 transitions, 4453 flow. Second operand 9 states and 194 transitions. [2024-06-27 23:39:19,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 350 transitions, 5610 flow [2024-06-27 23:39:19,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 350 transitions, 5421 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 23:39:19,792 INFO L231 Difference]: Finished difference. Result has 203 places, 316 transitions, 4642 flow [2024-06-27 23:39:19,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4264, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4642, PETRI_PLACES=203, PETRI_TRANSITIONS=316} [2024-06-27 23:39:19,792 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-27 23:39:19,792 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 316 transitions, 4642 flow [2024-06-27 23:39:19,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:19,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:19,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:19,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 23:39:19,793 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:19,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:19,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1686101528, now seen corresponding path program 1 times [2024-06-27 23:39:19,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:19,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178261393] [2024-06-27 23:39:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:19,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:21,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:21,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178261393] [2024-06-27 23:39:21,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178261393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:21,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:21,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:39:21,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840363784] [2024-06-27 23:39:21,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:21,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:39:21,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:21,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:39:21,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:39:21,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 23:39:21,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 316 transitions, 4642 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:21,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:21,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 23:39:21,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:21,800 INFO L124 PetriNetUnfolderBase]: 2330/3743 cut-off events. [2024-06-27 23:39:21,800 INFO L125 PetriNetUnfolderBase]: For 255944/255967 co-relation queries the response was YES. [2024-06-27 23:39:21,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30086 conditions, 3743 events. 2330/3743 cut-off events. For 255944/255967 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 20714 event pairs, 602 based on Foata normal form. 18/3733 useless extension candidates. Maximal degree in co-relation 29979. Up to 3231 conditions per place. [2024-06-27 23:39:21,837 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 244 selfloop transitions, 35 changer transitions 0/331 dead transitions. [2024-06-27 23:39:21,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 331 transitions, 5289 flow [2024-06-27 23:39:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 23:39:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 23:39:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-27 23:39:21,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-27 23:39:21,839 INFO L175 Difference]: Start difference. First operand has 203 places, 316 transitions, 4642 flow. Second operand 6 states and 130 transitions. [2024-06-27 23:39:21,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 331 transitions, 5289 flow [2024-06-27 23:39:22,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 331 transitions, 4944 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 23:39:22,069 INFO L231 Difference]: Finished difference. Result has 203 places, 319 transitions, 4421 flow [2024-06-27 23:39:22,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4297, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4421, PETRI_PLACES=203, PETRI_TRANSITIONS=319} [2024-06-27 23:39:22,070 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-27 23:39:22,070 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 319 transitions, 4421 flow [2024-06-27 23:39:22,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:22,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:22,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:22,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 23:39:22,070 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:22,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:22,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1769946535, now seen corresponding path program 5 times [2024-06-27 23:39:22,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:22,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424363289] [2024-06-27 23:39:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:22,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:24,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:24,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424363289] [2024-06-27 23:39:24,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424363289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:24,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:24,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:24,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011869375] [2024-06-27 23:39:24,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:24,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:24,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:24,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:24,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:24,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:24,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 319 transitions, 4421 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:24,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:24,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:24,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:25,621 INFO L124 PetriNetUnfolderBase]: 2591/4030 cut-off events. [2024-06-27 23:39:25,621 INFO L125 PetriNetUnfolderBase]: For 262985/262985 co-relation queries the response was YES. [2024-06-27 23:39:25,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31943 conditions, 4030 events. 2591/4030 cut-off events. For 262985/262985 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 21280 event pairs, 619 based on Foata normal form. 2/4019 useless extension candidates. Maximal degree in co-relation 31834. Up to 3138 conditions per place. [2024-06-27 23:39:25,658 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 166 selfloop transitions, 181 changer transitions 0/354 dead transitions. [2024-06-27 23:39:25,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 354 transitions, 5635 flow [2024-06-27 23:39:25,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 23:39:25,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2024-06-27 23:39:25,660 INFO L175 Difference]: Start difference. First operand has 203 places, 319 transitions, 4421 flow. Second operand 9 states and 191 transitions. [2024-06-27 23:39:25,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 354 transitions, 5635 flow [2024-06-27 23:39:25,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 354 transitions, 5568 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 23:39:25,890 INFO L231 Difference]: Finished difference. Result has 209 places, 322 transitions, 4781 flow [2024-06-27 23:39:25,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4354, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4781, PETRI_PLACES=209, PETRI_TRANSITIONS=322} [2024-06-27 23:39:25,891 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 164 predicate places. [2024-06-27 23:39:25,891 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 322 transitions, 4781 flow [2024-06-27 23:39:25,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:25,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:25,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:25,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 23:39:25,891 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:25,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:25,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1533294767, now seen corresponding path program 2 times [2024-06-27 23:39:25,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:25,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398503199] [2024-06-27 23:39:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:25,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:27,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:27,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398503199] [2024-06-27 23:39:27,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398503199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:27,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:27,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:27,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986620370] [2024-06-27 23:39:27,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:27,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:27,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:27,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:27,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:27,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:27,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 322 transitions, 4781 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:27,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:27,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:27,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:29,228 INFO L124 PetriNetUnfolderBase]: 2615/4070 cut-off events. [2024-06-27 23:39:29,228 INFO L125 PetriNetUnfolderBase]: For 278705/278711 co-relation queries the response was YES. [2024-06-27 23:39:29,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32894 conditions, 4070 events. 2615/4070 cut-off events. For 278705/278711 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 21623 event pairs, 658 based on Foata normal form. 7/4070 useless extension candidates. Maximal degree in co-relation 32783. Up to 3515 conditions per place. [2024-06-27 23:39:29,264 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 237 selfloop transitions, 119 changer transitions 0/363 dead transitions. [2024-06-27 23:39:29,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 363 transitions, 5988 flow [2024-06-27 23:39:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:39:29,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:39:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 23:39:29,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2024-06-27 23:39:29,270 INFO L175 Difference]: Start difference. First operand has 209 places, 322 transitions, 4781 flow. Second operand 11 states and 216 transitions. [2024-06-27 23:39:29,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 363 transitions, 5988 flow [2024-06-27 23:39:29,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 363 transitions, 5710 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 23:39:29,579 INFO L231 Difference]: Finished difference. Result has 215 places, 331 transitions, 4868 flow [2024-06-27 23:39:29,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4503, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4868, PETRI_PLACES=215, PETRI_TRANSITIONS=331} [2024-06-27 23:39:29,580 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-27 23:39:29,580 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 331 transitions, 4868 flow [2024-06-27 23:39:29,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:29,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:29,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:29,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 23:39:29,581 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:29,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:29,581 INFO L85 PathProgramCache]: Analyzing trace with hash -442393803, now seen corresponding path program 6 times [2024-06-27 23:39:29,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:29,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896664843] [2024-06-27 23:39:29,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:29,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:31,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:31,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896664843] [2024-06-27 23:39:31,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896664843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:31,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:31,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:31,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910400401] [2024-06-27 23:39:31,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:31,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:31,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:31,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:31,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:31,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 331 transitions, 4868 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:31,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:31,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:31,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:32,828 INFO L124 PetriNetUnfolderBase]: 2626/4079 cut-off events. [2024-06-27 23:39:32,828 INFO L125 PetriNetUnfolderBase]: For 301753/301753 co-relation queries the response was YES. [2024-06-27 23:39:32,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33772 conditions, 4079 events. 2626/4079 cut-off events. For 301753/301753 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 21576 event pairs, 653 based on Foata normal form. 2/4068 useless extension candidates. Maximal degree in co-relation 33658. Up to 3184 conditions per place. [2024-06-27 23:39:32,870 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 140 selfloop transitions, 217 changer transitions 0/364 dead transitions. [2024-06-27 23:39:32,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 364 transitions, 5950 flow [2024-06-27 23:39:32,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:32,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 23:39:32,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-27 23:39:32,872 INFO L175 Difference]: Start difference. First operand has 215 places, 331 transitions, 4868 flow. Second operand 9 states and 187 transitions. [2024-06-27 23:39:32,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 364 transitions, 5950 flow [2024-06-27 23:39:33,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 364 transitions, 5804 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-27 23:39:33,170 INFO L231 Difference]: Finished difference. Result has 221 places, 334 transitions, 5218 flow [2024-06-27 23:39:33,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5218, PETRI_PLACES=221, PETRI_TRANSITIONS=334} [2024-06-27 23:39:33,171 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 176 predicate places. [2024-06-27 23:39:33,171 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 334 transitions, 5218 flow [2024-06-27 23:39:33,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:33,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:33,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:33,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 23:39:33,177 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:33,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:33,177 INFO L85 PathProgramCache]: Analyzing trace with hash -678575673, now seen corresponding path program 7 times [2024-06-27 23:39:33,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:33,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132137187] [2024-06-27 23:39:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:33,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:35,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:35,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132137187] [2024-06-27 23:39:35,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132137187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:35,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:35,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:35,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968213010] [2024-06-27 23:39:35,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:35,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:35,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:35,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:35,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:35,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:35,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 334 transitions, 5218 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:35,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:35,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:35,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:36,657 INFO L124 PetriNetUnfolderBase]: 2653/4133 cut-off events. [2024-06-27 23:39:36,657 INFO L125 PetriNetUnfolderBase]: For 318597/318597 co-relation queries the response was YES. [2024-06-27 23:39:36,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35013 conditions, 4133 events. 2653/4133 cut-off events. For 318597/318597 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22005 event pairs, 662 based on Foata normal form. 2/4122 useless extension candidates. Maximal degree in co-relation 34895. Up to 3213 conditions per place. [2024-06-27 23:39:36,715 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 189 selfloop transitions, 183 changer transitions 0/379 dead transitions. [2024-06-27 23:39:36,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 379 transitions, 6801 flow [2024-06-27 23:39:36,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 23:39:36,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-27 23:39:36,718 INFO L175 Difference]: Start difference. First operand has 221 places, 334 transitions, 5218 flow. Second operand 9 states and 195 transitions. [2024-06-27 23:39:36,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 379 transitions, 6801 flow [2024-06-27 23:39:37,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 379 transitions, 6409 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 23:39:37,138 INFO L231 Difference]: Finished difference. Result has 223 places, 340 transitions, 5317 flow [2024-06-27 23:39:37,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4848, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5317, PETRI_PLACES=223, PETRI_TRANSITIONS=340} [2024-06-27 23:39:37,139 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-27 23:39:37,139 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 340 transitions, 5317 flow [2024-06-27 23:39:37,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:37,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:37,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:37,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 23:39:37,140 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:37,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:37,140 INFO L85 PathProgramCache]: Analyzing trace with hash -442393555, now seen corresponding path program 3 times [2024-06-27 23:39:37,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:37,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727491400] [2024-06-27 23:39:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:37,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:39,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:39,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727491400] [2024-06-27 23:39:39,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727491400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:39,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:39,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:39,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348660227] [2024-06-27 23:39:39,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:39,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:39,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:39,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:39,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:39,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:39,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 340 transitions, 5317 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:39,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:39,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:39,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:40,363 INFO L124 PetriNetUnfolderBase]: 2664/4151 cut-off events. [2024-06-27 23:39:40,364 INFO L125 PetriNetUnfolderBase]: For 332733/332739 co-relation queries the response was YES. [2024-06-27 23:39:40,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35271 conditions, 4151 events. 2664/4151 cut-off events. For 332733/332739 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22246 event pairs, 658 based on Foata normal form. 6/4150 useless extension candidates. Maximal degree in co-relation 35151. Up to 3601 conditions per place. [2024-06-27 23:39:40,405 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 264 selfloop transitions, 102 changer transitions 0/373 dead transitions. [2024-06-27 23:39:40,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 373 transitions, 6413 flow [2024-06-27 23:39:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:40,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 23:39:40,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-27 23:39:40,409 INFO L175 Difference]: Start difference. First operand has 223 places, 340 transitions, 5317 flow. Second operand 9 states and 184 transitions. [2024-06-27 23:39:40,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 373 transitions, 6413 flow [2024-06-27 23:39:40,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 373 transitions, 6023 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 23:39:40,788 INFO L231 Difference]: Finished difference. Result has 227 places, 343 transitions, 5182 flow [2024-06-27 23:39:40,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5182, PETRI_PLACES=227, PETRI_TRANSITIONS=343} [2024-06-27 23:39:40,789 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-27 23:39:40,789 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 343 transitions, 5182 flow [2024-06-27 23:39:40,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:40,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:40,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:40,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 23:39:40,790 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:40,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:40,790 INFO L85 PathProgramCache]: Analyzing trace with hash -678569163, now seen corresponding path program 8 times [2024-06-27 23:39:40,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:40,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452107399] [2024-06-27 23:39:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:40,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:42,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:42,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452107399] [2024-06-27 23:39:42,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452107399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:42,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:42,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:42,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568134700] [2024-06-27 23:39:42,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:42,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:42,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:42,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:42,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:42,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:42,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 343 transitions, 5182 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:42,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:42,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:42,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:44,188 INFO L124 PetriNetUnfolderBase]: 2659/4142 cut-off events. [2024-06-27 23:39:44,188 INFO L125 PetriNetUnfolderBase]: For 340865/340865 co-relation queries the response was YES. [2024-06-27 23:39:44,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35204 conditions, 4142 events. 2659/4142 cut-off events. For 340865/340865 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22094 event pairs, 666 based on Foata normal form. 2/4131 useless extension candidates. Maximal degree in co-relation 35081. Up to 3224 conditions per place. [2024-06-27 23:39:44,316 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 186 selfloop transitions, 185 changer transitions 0/378 dead transitions. [2024-06-27 23:39:44,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 378 transitions, 6468 flow [2024-06-27 23:39:44,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-27 23:39:44,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-27 23:39:44,318 INFO L175 Difference]: Start difference. First operand has 227 places, 343 transitions, 5182 flow. Second operand 9 states and 192 transitions. [2024-06-27 23:39:44,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 378 transitions, 6468 flow [2024-06-27 23:39:44,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 378 transitions, 6263 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 23:39:44,696 INFO L231 Difference]: Finished difference. Result has 231 places, 343 transitions, 5358 flow [2024-06-27 23:39:44,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4977, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5358, PETRI_PLACES=231, PETRI_TRANSITIONS=343} [2024-06-27 23:39:44,698 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-27 23:39:44,698 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 343 transitions, 5358 flow [2024-06-27 23:39:44,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:44,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:44,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:44,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 23:39:44,699 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:44,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:44,700 INFO L85 PathProgramCache]: Analyzing trace with hash -450674523, now seen corresponding path program 9 times [2024-06-27 23:39:44,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:44,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710989667] [2024-06-27 23:39:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:44,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:46,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:46,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710989667] [2024-06-27 23:39:46,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710989667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:46,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:46,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:46,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129198635] [2024-06-27 23:39:46,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:46,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:46,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:46,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:46,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:46,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:46,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 343 transitions, 5358 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:46,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:46,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:46,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:47,993 INFO L124 PetriNetUnfolderBase]: 2670/4158 cut-off events. [2024-06-27 23:39:47,993 INFO L125 PetriNetUnfolderBase]: For 356003/356003 co-relation queries the response was YES. [2024-06-27 23:39:48,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35831 conditions, 4158 events. 2670/4158 cut-off events. For 356003/356003 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 22155 event pairs, 653 based on Foata normal form. 2/4147 useless extension candidates. Maximal degree in co-relation 35705. Up to 3236 conditions per place. [2024-06-27 23:39:48,037 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 171 selfloop transitions, 202 changer transitions 0/380 dead transitions. [2024-06-27 23:39:48,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 380 transitions, 6699 flow [2024-06-27 23:39:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 23:39:48,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-27 23:39:48,039 INFO L175 Difference]: Start difference. First operand has 231 places, 343 transitions, 5358 flow. Second operand 9 states and 190 transitions. [2024-06-27 23:39:48,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 380 transitions, 6699 flow [2024-06-27 23:39:48,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 380 transitions, 6264 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 23:39:48,437 INFO L231 Difference]: Finished difference. Result has 234 places, 346 transitions, 5390 flow [2024-06-27 23:39:48,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4929, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5390, PETRI_PLACES=234, PETRI_TRANSITIONS=346} [2024-06-27 23:39:48,438 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-27 23:39:48,438 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 346 transitions, 5390 flow [2024-06-27 23:39:48,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:48,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:48,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:48,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 23:39:48,439 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:48,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:48,439 INFO L85 PathProgramCache]: Analyzing trace with hash -678568915, now seen corresponding path program 4 times [2024-06-27 23:39:48,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:48,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79384672] [2024-06-27 23:39:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:48,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:50,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:50,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79384672] [2024-06-27 23:39:50,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79384672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:50,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:50,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:50,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636377934] [2024-06-27 23:39:50,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:50,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:50,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:50,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:50,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:50,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:50,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 346 transitions, 5390 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:50,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:50,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:50,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:51,707 INFO L124 PetriNetUnfolderBase]: 2681/4172 cut-off events. [2024-06-27 23:39:51,707 INFO L125 PetriNetUnfolderBase]: For 370425/370431 co-relation queries the response was YES. [2024-06-27 23:39:51,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36234 conditions, 4172 events. 2681/4172 cut-off events. For 370425/370431 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22338 event pairs, 640 based on Foata normal form. 6/4171 useless extension candidates. Maximal degree in co-relation 36105. Up to 3622 conditions per place. [2024-06-27 23:39:51,750 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 278 selfloop transitions, 96 changer transitions 0/381 dead transitions. [2024-06-27 23:39:51,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 381 transitions, 6703 flow [2024-06-27 23:39:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:51,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 23:39:51,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-27 23:39:51,752 INFO L175 Difference]: Start difference. First operand has 234 places, 346 transitions, 5390 flow. Second operand 9 states and 188 transitions. [2024-06-27 23:39:51,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 381 transitions, 6703 flow [2024-06-27 23:39:52,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 381 transitions, 6400 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 23:39:52,225 INFO L231 Difference]: Finished difference. Result has 238 places, 349 transitions, 5333 flow [2024-06-27 23:39:52,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5087, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5333, PETRI_PLACES=238, PETRI_TRANSITIONS=349} [2024-06-27 23:39:52,226 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 193 predicate places. [2024-06-27 23:39:52,226 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 349 transitions, 5333 flow [2024-06-27 23:39:52,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:52,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:52,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:52,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 23:39:52,227 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:52,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:52,227 INFO L85 PathProgramCache]: Analyzing trace with hash -450668013, now seen corresponding path program 10 times [2024-06-27 23:39:52,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:52,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351244914] [2024-06-27 23:39:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:52,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:54,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:54,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351244914] [2024-06-27 23:39:54,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351244914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:54,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:54,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:54,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451799732] [2024-06-27 23:39:54,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:54,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:54,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:54,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:54,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:54,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:54,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 349 transitions, 5333 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:54,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:54,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:54,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:55,493 INFO L124 PetriNetUnfolderBase]: 2676/4172 cut-off events. [2024-06-27 23:39:55,493 INFO L125 PetriNetUnfolderBase]: For 380769/380769 co-relation queries the response was YES. [2024-06-27 23:39:55,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36145 conditions, 4172 events. 2676/4172 cut-off events. For 380769/380769 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22329 event pairs, 653 based on Foata normal form. 2/4161 useless extension candidates. Maximal degree in co-relation 36013. Up to 3247 conditions per place. [2024-06-27 23:39:55,540 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 176 selfloop transitions, 200 changer transitions 0/383 dead transitions. [2024-06-27 23:39:55,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 383 transitions, 6473 flow [2024-06-27 23:39:55,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 23:39:55,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:39:55,542 INFO L175 Difference]: Start difference. First operand has 238 places, 349 transitions, 5333 flow. Second operand 9 states and 189 transitions. [2024-06-27 23:39:55,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 383 transitions, 6473 flow [2024-06-27 23:39:56,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 383 transitions, 6224 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 23:39:56,046 INFO L231 Difference]: Finished difference. Result has 240 places, 349 transitions, 5495 flow [2024-06-27 23:39:56,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5084, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5495, PETRI_PLACES=240, PETRI_TRANSITIONS=349} [2024-06-27 23:39:56,047 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 195 predicate places. [2024-06-27 23:39:56,047 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 349 transitions, 5495 flow [2024-06-27 23:39:56,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:56,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:56,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:56,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 23:39:56,047 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:56,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:56,048 INFO L85 PathProgramCache]: Analyzing trace with hash -450667765, now seen corresponding path program 5 times [2024-06-27 23:39:56,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:56,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207776075] [2024-06-27 23:39:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:56,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:39:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:39:57,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:39:57,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207776075] [2024-06-27 23:39:57,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207776075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:39:57,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:39:57,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:39:57,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520299059] [2024-06-27 23:39:57,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:39:57,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:39:57,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:39:57,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:39:57,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:39:58,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:39:58,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 349 transitions, 5495 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:58,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:39:58,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:39:58,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:39:59,278 INFO L124 PetriNetUnfolderBase]: 2671/4158 cut-off events. [2024-06-27 23:39:59,278 INFO L125 PetriNetUnfolderBase]: For 395083/395089 co-relation queries the response was YES. [2024-06-27 23:39:59,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36556 conditions, 4158 events. 2671/4158 cut-off events. For 395083/395089 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 22258 event pairs, 633 based on Foata normal form. 6/4157 useless extension candidates. Maximal degree in co-relation 36422. Up to 3610 conditions per place. [2024-06-27 23:39:59,322 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 274 selfloop transitions, 99 changer transitions 0/380 dead transitions. [2024-06-27 23:39:59,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 380 transitions, 6595 flow [2024-06-27 23:39:59,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:39:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:39:59,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 23:39:59,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-27 23:39:59,323 INFO L175 Difference]: Start difference. First operand has 240 places, 349 transitions, 5495 flow. Second operand 9 states and 185 transitions. [2024-06-27 23:39:59,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 380 transitions, 6595 flow [2024-06-27 23:39:59,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 380 transitions, 6166 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 23:39:59,823 INFO L231 Difference]: Finished difference. Result has 243 places, 349 transitions, 5275 flow [2024-06-27 23:39:59,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5066, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5275, PETRI_PLACES=243, PETRI_TRANSITIONS=349} [2024-06-27 23:39:59,823 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-27 23:39:59,823 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 349 transitions, 5275 flow [2024-06-27 23:39:59,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:39:59,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:39:59,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:39:59,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 23:39:59,824 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:39:59,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:39:59,825 INFO L85 PathProgramCache]: Analyzing trace with hash 753815036, now seen corresponding path program 2 times [2024-06-27 23:39:59,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:39:59,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481076122] [2024-06-27 23:39:59,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:39:59,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:39:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:01,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:01,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481076122] [2024-06-27 23:40:01,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481076122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:01,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:01,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:40:01,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810037160] [2024-06-27 23:40:01,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:01,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:40:01,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:01,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:40:01,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:40:01,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 23:40:01,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 349 transitions, 5275 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:01,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:01,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 23:40:01,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:02,047 INFO L124 PetriNetUnfolderBase]: 2425/3907 cut-off events. [2024-06-27 23:40:02,048 INFO L125 PetriNetUnfolderBase]: For 410102/410129 co-relation queries the response was YES. [2024-06-27 23:40:02,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35004 conditions, 3907 events. 2425/3907 cut-off events. For 410102/410129 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 21833 event pairs, 608 based on Foata normal form. 19/3888 useless extension candidates. Maximal degree in co-relation 34867. Up to 3349 conditions per place. [2024-06-27 23:40:02,091 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 271 selfloop transitions, 42 changer transitions 0/365 dead transitions. [2024-06-27 23:40:02,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 365 transitions, 6142 flow [2024-06-27 23:40:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:40:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:40:02,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 23:40:02,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-27 23:40:02,092 INFO L175 Difference]: Start difference. First operand has 243 places, 349 transitions, 5275 flow. Second operand 7 states and 141 transitions. [2024-06-27 23:40:02,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 365 transitions, 6142 flow [2024-06-27 23:40:02,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 365 transitions, 5955 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 23:40:02,677 INFO L231 Difference]: Finished difference. Result has 243 places, 355 transitions, 5276 flow [2024-06-27 23:40:02,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5088, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5276, PETRI_PLACES=243, PETRI_TRANSITIONS=355} [2024-06-27 23:40:02,678 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-27 23:40:02,678 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 355 transitions, 5276 flow [2024-06-27 23:40:02,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:02,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:02,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:02,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 23:40:02,679 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:02,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:02,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1552420009, now seen corresponding path program 3 times [2024-06-27 23:40:02,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:02,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586837912] [2024-06-27 23:40:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:02,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:04,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:04,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586837912] [2024-06-27 23:40:04,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586837912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:04,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:04,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:40:04,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69122127] [2024-06-27 23:40:04,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:04,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:40:04,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:04,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:40:04,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:40:04,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:40:04,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 355 transitions, 5276 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:04,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:04,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:40:04,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:05,338 INFO L124 PetriNetUnfolderBase]: 2570/4087 cut-off events. [2024-06-27 23:40:05,339 INFO L125 PetriNetUnfolderBase]: For 429091/429096 co-relation queries the response was YES. [2024-06-27 23:40:05,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36478 conditions, 4087 events. 2570/4087 cut-off events. For 429091/429096 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 22621 event pairs, 619 based on Foata normal form. 9/4087 useless extension candidates. Maximal degree in co-relation 36340. Up to 3546 conditions per place. [2024-06-27 23:40:05,384 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 295 selfloop transitions, 53 changer transitions 0/387 dead transitions. [2024-06-27 23:40:05,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 387 transitions, 6146 flow [2024-06-27 23:40:05,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:40:05,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:40:05,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 23:40:05,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:40:05,386 INFO L175 Difference]: Start difference. First operand has 243 places, 355 transitions, 5276 flow. Second operand 9 states and 189 transitions. [2024-06-27 23:40:05,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 387 transitions, 6146 flow [2024-06-27 23:40:06,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 387 transitions, 6063 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 23:40:06,006 INFO L231 Difference]: Finished difference. Result has 249 places, 359 transitions, 5387 flow [2024-06-27 23:40:06,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5193, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5387, PETRI_PLACES=249, PETRI_TRANSITIONS=359} [2024-06-27 23:40:06,006 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 204 predicate places. [2024-06-27 23:40:06,006 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 359 transitions, 5387 flow [2024-06-27 23:40:06,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:06,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:06,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:06,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 23:40:06,007 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:06,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:06,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1536337815, now seen corresponding path program 4 times [2024-06-27 23:40:06,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:06,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345449022] [2024-06-27 23:40:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:06,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:07,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:07,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345449022] [2024-06-27 23:40:07,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345449022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:07,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:07,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:40:07,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460548403] [2024-06-27 23:40:07,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:07,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:40:07,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:07,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:40:07,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:40:07,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:40:07,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 359 transitions, 5387 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:07,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:07,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:40:07,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:08,741 INFO L124 PetriNetUnfolderBase]: 2680/4265 cut-off events. [2024-06-27 23:40:08,741 INFO L125 PetriNetUnfolderBase]: For 457519/457531 co-relation queries the response was YES. [2024-06-27 23:40:08,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38464 conditions, 4265 events. 2680/4265 cut-off events. For 457519/457531 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 23873 event pairs, 634 based on Foata normal form. 9/4263 useless extension candidates. Maximal degree in co-relation 38324. Up to 3596 conditions per place. [2024-06-27 23:40:08,783 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 298 selfloop transitions, 86 changer transitions 0/423 dead transitions. [2024-06-27 23:40:08,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 423 transitions, 6791 flow [2024-06-27 23:40:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 23:40:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 23:40:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-27 23:40:08,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47202797202797203 [2024-06-27 23:40:08,785 INFO L175 Difference]: Start difference. First operand has 249 places, 359 transitions, 5387 flow. Second operand 13 states and 270 transitions. [2024-06-27 23:40:08,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 423 transitions, 6791 flow [2024-06-27 23:40:09,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 423 transitions, 6595 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 23:40:09,450 INFO L231 Difference]: Finished difference. Result has 256 places, 373 transitions, 5647 flow [2024-06-27 23:40:09,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5241, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5647, PETRI_PLACES=256, PETRI_TRANSITIONS=373} [2024-06-27 23:40:09,451 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-27 23:40:09,451 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 373 transitions, 5647 flow [2024-06-27 23:40:09,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:09,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:09,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:09,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 23:40:09,452 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:09,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1129929323, now seen corresponding path program 11 times [2024-06-27 23:40:09,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:09,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516549548] [2024-06-27 23:40:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:09,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:11,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:11,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516549548] [2024-06-27 23:40:11,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516549548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:11,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:11,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:40:11,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578491604] [2024-06-27 23:40:11,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:11,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:40:11,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:11,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:40:11,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:40:11,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:40:11,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 373 transitions, 5647 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:11,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:11,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:40:11,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:12,459 INFO L124 PetriNetUnfolderBase]: 2831/4415 cut-off events. [2024-06-27 23:40:12,459 INFO L125 PetriNetUnfolderBase]: For 463845/463847 co-relation queries the response was YES. [2024-06-27 23:40:12,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39791 conditions, 4415 events. 2831/4415 cut-off events. For 463845/463847 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 24037 event pairs, 665 based on Foata normal form. 4/4416 useless extension candidates. Maximal degree in co-relation 39649. Up to 4016 conditions per place. [2024-06-27 23:40:12,507 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 335 selfloop transitions, 67 changer transitions 0/409 dead transitions. [2024-06-27 23:40:12,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 409 transitions, 6646 flow [2024-06-27 23:40:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:40:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:40:12,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 23:40:12,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-27 23:40:12,508 INFO L175 Difference]: Start difference. First operand has 256 places, 373 transitions, 5647 flow. Second operand 10 states and 199 transitions. [2024-06-27 23:40:12,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 409 transitions, 6646 flow [2024-06-27 23:40:13,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 409 transitions, 6506 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 23:40:13,271 INFO L231 Difference]: Finished difference. Result has 259 places, 379 transitions, 5750 flow [2024-06-27 23:40:13,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5507, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5750, PETRI_PLACES=259, PETRI_TRANSITIONS=379} [2024-06-27 23:40:13,272 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-27 23:40:13,272 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 379 transitions, 5750 flow [2024-06-27 23:40:13,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:13,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:13,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:13,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 23:40:13,272 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:13,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:13,273 INFO L85 PathProgramCache]: Analyzing trace with hash 41117297, now seen corresponding path program 5 times [2024-06-27 23:40:13,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:13,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170456399] [2024-06-27 23:40:13,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:13,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:14,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:14,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170456399] [2024-06-27 23:40:14,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170456399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:14,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:14,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:40:14,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550765380] [2024-06-27 23:40:14,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:14,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:40:14,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:40:14,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:40:14,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:40:14,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 379 transitions, 5750 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:14,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:14,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:40:14,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:16,042 INFO L124 PetriNetUnfolderBase]: 2718/4331 cut-off events. [2024-06-27 23:40:16,042 INFO L125 PetriNetUnfolderBase]: For 484427/484439 co-relation queries the response was YES. [2024-06-27 23:40:16,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39259 conditions, 4331 events. 2718/4331 cut-off events. For 484427/484439 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 24374 event pairs, 648 based on Foata normal form. 9/4329 useless extension candidates. Maximal degree in co-relation 39115. Up to 3738 conditions per place. [2024-06-27 23:40:16,089 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 310 selfloop transitions, 78 changer transitions 0/427 dead transitions. [2024-06-27 23:40:16,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 427 transitions, 6744 flow [2024-06-27 23:40:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 23:40:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 23:40:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 264 transitions. [2024-06-27 23:40:16,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 23:40:16,103 INFO L175 Difference]: Start difference. First operand has 259 places, 379 transitions, 5750 flow. Second operand 13 states and 264 transitions. [2024-06-27 23:40:16,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 427 transitions, 6744 flow [2024-06-27 23:40:16,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 427 transitions, 6566 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 23:40:16,969 INFO L231 Difference]: Finished difference. Result has 264 places, 383 transitions, 5789 flow [2024-06-27 23:40:16,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5789, PETRI_PLACES=264, PETRI_TRANSITIONS=383} [2024-06-27 23:40:16,970 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 219 predicate places. [2024-06-27 23:40:16,970 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 383 transitions, 5789 flow [2024-06-27 23:40:16,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:16,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:16,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:16,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 23:40:16,971 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:16,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:16,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1014458663, now seen corresponding path program 12 times [2024-06-27 23:40:16,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:16,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208785383] [2024-06-27 23:40:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:16,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:18,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:18,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208785383] [2024-06-27 23:40:18,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208785383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:18,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:18,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:40:18,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492705361] [2024-06-27 23:40:18,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:18,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:40:18,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:18,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:40:18,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:40:18,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:40:18,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 383 transitions, 5789 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:18,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:18,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:40:18,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:20,212 INFO L124 PetriNetUnfolderBase]: 2954/4622 cut-off events. [2024-06-27 23:40:20,212 INFO L125 PetriNetUnfolderBase]: For 490180/490183 co-relation queries the response was YES. [2024-06-27 23:40:20,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40907 conditions, 4622 events. 2954/4622 cut-off events. For 490180/490183 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 25467 event pairs, 705 based on Foata normal form. 2/4620 useless extension candidates. Maximal degree in co-relation 40762. Up to 3628 conditions per place. [2024-06-27 23:40:20,258 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 201 selfloop transitions, 259 changer transitions 0/467 dead transitions. [2024-06-27 23:40:20,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 467 transitions, 7638 flow [2024-06-27 23:40:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:40:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:40:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 23:40:20,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-27 23:40:20,260 INFO L175 Difference]: Start difference. First operand has 264 places, 383 transitions, 5789 flow. Second operand 10 states and 212 transitions. [2024-06-27 23:40:20,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 467 transitions, 7638 flow [2024-06-27 23:40:21,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 467 transitions, 7495 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 23:40:21,057 INFO L231 Difference]: Finished difference. Result has 265 places, 429 transitions, 6750 flow [2024-06-27 23:40:21,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5646, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6750, PETRI_PLACES=265, PETRI_TRANSITIONS=429} [2024-06-27 23:40:21,058 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-27 23:40:21,058 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 429 transitions, 6750 flow [2024-06-27 23:40:21,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:21,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:21,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:21,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 23:40:21,058 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:21,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:21,059 INFO L85 PathProgramCache]: Analyzing trace with hash 313943281, now seen corresponding path program 6 times [2024-06-27 23:40:21,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:21,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435363707] [2024-06-27 23:40:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:21,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:21,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:21,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435363707] [2024-06-27 23:40:21,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435363707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:21,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:21,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:40:21,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705169991] [2024-06-27 23:40:21,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:21,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:40:21,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:40:21,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:40:22,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-27 23:40:22,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 429 transitions, 6750 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:22,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:22,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-27 23:40:22,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:23,529 INFO L124 PetriNetUnfolderBase]: 2446/4169 cut-off events. [2024-06-27 23:40:23,530 INFO L125 PetriNetUnfolderBase]: For 456192/456273 co-relation queries the response was YES. [2024-06-27 23:40:23,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37043 conditions, 4169 events. 2446/4169 cut-off events. For 456192/456273 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25181 event pairs, 364 based on Foata normal form. 48/4192 useless extension candidates. Maximal degree in co-relation 36896. Up to 2833 conditions per place. [2024-06-27 23:40:23,579 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 262 selfloop transitions, 111 changer transitions 0/497 dead transitions. [2024-06-27 23:40:23,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 497 transitions, 8392 flow [2024-06-27 23:40:23,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:40:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:40:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 279 transitions. [2024-06-27 23:40:23,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284090909090909 [2024-06-27 23:40:23,587 INFO L175 Difference]: Start difference. First operand has 265 places, 429 transitions, 6750 flow. Second operand 12 states and 279 transitions. [2024-06-27 23:40:23,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 497 transitions, 8392 flow [2024-06-27 23:40:24,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 497 transitions, 7739 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 23:40:24,479 INFO L231 Difference]: Finished difference. Result has 273 places, 453 transitions, 6939 flow [2024-06-27 23:40:24,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6111, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6939, PETRI_PLACES=273, PETRI_TRANSITIONS=453} [2024-06-27 23:40:24,479 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-27 23:40:24,479 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 453 transitions, 6939 flow [2024-06-27 23:40:24,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:24,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:24,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:24,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 23:40:24,480 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:24,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:24,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1014638153, now seen corresponding path program 13 times [2024-06-27 23:40:24,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:24,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630903075] [2024-06-27 23:40:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:24,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:26,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:26,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630903075] [2024-06-27 23:40:26,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630903075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:26,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:26,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:40:26,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983597900] [2024-06-27 23:40:26,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:26,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:40:26,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:26,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:40:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:40:26,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:40:26,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 453 transitions, 6939 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:26,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:26,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:40:26,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:27,663 INFO L124 PetriNetUnfolderBase]: 3087/4823 cut-off events. [2024-06-27 23:40:27,663 INFO L125 PetriNetUnfolderBase]: For 551008/551011 co-relation queries the response was YES. [2024-06-27 23:40:27,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44200 conditions, 4823 events. 3087/4823 cut-off events. For 551008/551011 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 26829 event pairs, 708 based on Foata normal form. 2/4821 useless extension candidates. Maximal degree in co-relation 44049. Up to 3823 conditions per place. [2024-06-27 23:40:27,721 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 241 selfloop transitions, 251 changer transitions 0/499 dead transitions. [2024-06-27 23:40:27,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 499 transitions, 8730 flow [2024-06-27 23:40:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:40:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:40:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-27 23:40:27,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-27 23:40:27,723 INFO L175 Difference]: Start difference. First operand has 273 places, 453 transitions, 6939 flow. Second operand 10 states and 216 transitions. [2024-06-27 23:40:27,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 499 transitions, 8730 flow [2024-06-27 23:40:28,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 499 transitions, 8427 flow, removed 136 selfloop flow, removed 5 redundant places. [2024-06-27 23:40:28,829 INFO L231 Difference]: Finished difference. Result has 278 places, 459 transitions, 7262 flow [2024-06-27 23:40:28,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6636, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7262, PETRI_PLACES=278, PETRI_TRANSITIONS=459} [2024-06-27 23:40:28,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-27 23:40:28,830 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 459 transitions, 7262 flow [2024-06-27 23:40:28,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:28,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:28,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:28,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 23:40:28,831 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:28,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:28,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1905325235, now seen corresponding path program 14 times [2024-06-27 23:40:28,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:28,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660617136] [2024-06-27 23:40:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:28,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:30,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:30,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660617136] [2024-06-27 23:40:30,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660617136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:30,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:30,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:40:30,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494888586] [2024-06-27 23:40:30,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:30,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:40:30,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:40:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:40:30,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:40:30,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 459 transitions, 7262 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:30,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:30,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:40:30,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:32,111 INFO L124 PetriNetUnfolderBase]: 3096/4867 cut-off events. [2024-06-27 23:40:32,111 INFO L125 PetriNetUnfolderBase]: For 560826/560828 co-relation queries the response was YES. [2024-06-27 23:40:32,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44614 conditions, 4867 events. 3096/4867 cut-off events. For 560826/560828 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27260 event pairs, 706 based on Foata normal form. 4/4868 useless extension candidates. Maximal degree in co-relation 44461. Up to 4285 conditions per place. [2024-06-27 23:40:32,169 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 389 selfloop transitions, 126 changer transitions 0/522 dead transitions. [2024-06-27 23:40:32,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 522 transitions, 8669 flow [2024-06-27 23:40:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 23:40:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 23:40:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 310 transitions. [2024-06-27 23:40:32,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 23:40:32,171 INFO L175 Difference]: Start difference. First operand has 278 places, 459 transitions, 7262 flow. Second operand 16 states and 310 transitions. [2024-06-27 23:40:32,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 522 transitions, 8669 flow [2024-06-27 23:40:33,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 522 transitions, 8161 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 23:40:33,244 INFO L231 Difference]: Finished difference. Result has 287 places, 467 transitions, 7161 flow [2024-06-27 23:40:33,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6762, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7161, PETRI_PLACES=287, PETRI_TRANSITIONS=467} [2024-06-27 23:40:33,245 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-27 23:40:33,245 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 467 transitions, 7161 flow [2024-06-27 23:40:33,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:33,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:33,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:33,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 23:40:33,246 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:33,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:33,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1556204425, now seen corresponding path program 7 times [2024-06-27 23:40:33,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:33,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241987500] [2024-06-27 23:40:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:33,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:34,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:34,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241987500] [2024-06-27 23:40:34,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241987500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:34,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:34,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:40:34,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589790801] [2024-06-27 23:40:34,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:34,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:40:34,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:34,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:40:34,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:40:34,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:40:34,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 467 transitions, 7161 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:34,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:34,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:40:34,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:36,413 INFO L124 PetriNetUnfolderBase]: 2993/4768 cut-off events. [2024-06-27 23:40:36,414 INFO L125 PetriNetUnfolderBase]: For 545219/545234 co-relation queries the response was YES. [2024-06-27 23:40:36,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43145 conditions, 4768 events. 2993/4768 cut-off events. For 545219/545234 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27339 event pairs, 656 based on Foata normal form. 21/4774 useless extension candidates. Maximal degree in co-relation 42992. Up to 4058 conditions per place. [2024-06-27 23:40:36,491 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 395 selfloop transitions, 77 changer transitions 0/511 dead transitions. [2024-06-27 23:40:36,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 511 transitions, 8361 flow [2024-06-27 23:40:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:40:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:40:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 23:40:36,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:40:36,495 INFO L175 Difference]: Start difference. First operand has 287 places, 467 transitions, 7161 flow. Second operand 10 states and 210 transitions. [2024-06-27 23:40:36,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 511 transitions, 8361 flow [2024-06-27 23:40:37,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 511 transitions, 8058 flow, removed 29 selfloop flow, removed 12 redundant places. [2024-06-27 23:40:37,617 INFO L231 Difference]: Finished difference. Result has 286 places, 476 transitions, 7178 flow [2024-06-27 23:40:37,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6823, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7178, PETRI_PLACES=286, PETRI_TRANSITIONS=476} [2024-06-27 23:40:37,617 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-27 23:40:37,618 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 476 transitions, 7178 flow [2024-06-27 23:40:37,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:37,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:37,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:37,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 23:40:37,618 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:37,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:37,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1560969125, now seen corresponding path program 15 times [2024-06-27 23:40:37,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:37,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76922802] [2024-06-27 23:40:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:37,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:39,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:39,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76922802] [2024-06-27 23:40:39,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76922802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:39,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:39,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:40:39,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998588235] [2024-06-27 23:40:39,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:39,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:40:39,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:39,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:40:39,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:40:39,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:40:39,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 476 transitions, 7178 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:39,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:39,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:40:39,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:40,994 INFO L124 PetriNetUnfolderBase]: 3144/4929 cut-off events. [2024-06-27 23:40:40,994 INFO L125 PetriNetUnfolderBase]: For 550007/550010 co-relation queries the response was YES. [2024-06-27 23:40:41,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44269 conditions, 4929 events. 3144/4929 cut-off events. For 550007/550010 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 27621 event pairs, 696 based on Foata normal form. 2/4927 useless extension candidates. Maximal degree in co-relation 44114. Up to 3912 conditions per place. [2024-06-27 23:40:41,048 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 241 selfloop transitions, 264 changer transitions 0/512 dead transitions. [2024-06-27 23:40:41,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 512 transitions, 8439 flow [2024-06-27 23:40:41,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:40:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:40:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-27 23:40:41,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-27 23:40:41,049 INFO L175 Difference]: Start difference. First operand has 286 places, 476 transitions, 7178 flow. Second operand 10 states and 211 transitions. [2024-06-27 23:40:41,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 512 transitions, 8439 flow [2024-06-27 23:40:42,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 512 transitions, 8226 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 23:40:42,369 INFO L231 Difference]: Finished difference. Result has 290 places, 476 transitions, 7505 flow [2024-06-27 23:40:42,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6965, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7505, PETRI_PLACES=290, PETRI_TRANSITIONS=476} [2024-06-27 23:40:42,369 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-27 23:40:42,369 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 476 transitions, 7505 flow [2024-06-27 23:40:42,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:42,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:42,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:42,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 23:40:42,370 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:42,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:42,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1014458415, now seen corresponding path program 6 times [2024-06-27 23:40:42,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:42,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642273767] [2024-06-27 23:40:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:42,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:44,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:44,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642273767] [2024-06-27 23:40:44,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642273767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:44,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:44,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:40:44,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610053197] [2024-06-27 23:40:44,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:44,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:40:44,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:44,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:40:44,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:40:44,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:40:44,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 476 transitions, 7505 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:44,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:44,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:40:44,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:45,955 INFO L124 PetriNetUnfolderBase]: 3181/5003 cut-off events. [2024-06-27 23:40:45,956 INFO L125 PetriNetUnfolderBase]: For 548817/548822 co-relation queries the response was YES. [2024-06-27 23:40:45,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44828 conditions, 5003 events. 3181/5003 cut-off events. For 548817/548822 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28291 event pairs, 806 based on Foata normal form. 4/5003 useless extension candidates. Maximal degree in co-relation 44672. Up to 4373 conditions per place. [2024-06-27 23:40:46,023 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 404 selfloop transitions, 118 changer transitions 0/529 dead transitions. [2024-06-27 23:40:46,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 529 transitions, 8996 flow [2024-06-27 23:40:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:40:46,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:40:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 23:40:46,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-27 23:40:46,025 INFO L175 Difference]: Start difference. First operand has 290 places, 476 transitions, 7505 flow. Second operand 10 states and 208 transitions. [2024-06-27 23:40:46,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 529 transitions, 8996 flow [2024-06-27 23:40:47,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 529 transitions, 8350 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-27 23:40:47,476 INFO L231 Difference]: Finished difference. Result has 291 places, 495 transitions, 7383 flow [2024-06-27 23:40:47,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6871, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7383, PETRI_PLACES=291, PETRI_TRANSITIONS=495} [2024-06-27 23:40:47,478 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 246 predicate places. [2024-06-27 23:40:47,478 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 495 transitions, 7383 flow [2024-06-27 23:40:47,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:47,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:47,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:47,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 23:40:47,478 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:47,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1597033768, now seen corresponding path program 3 times [2024-06-27 23:40:47,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:47,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265048124] [2024-06-27 23:40:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:47,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:48,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:48,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265048124] [2024-06-27 23:40:48,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265048124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:48,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:48,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 23:40:48,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515382584] [2024-06-27 23:40:48,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:48,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 23:40:48,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:48,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 23:40:48,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 23:40:48,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 23:40:48,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 495 transitions, 7383 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:48,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:48,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 23:40:48,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:49,731 INFO L124 PetriNetUnfolderBase]: 2852/4593 cut-off events. [2024-06-27 23:40:49,732 INFO L125 PetriNetUnfolderBase]: For 569300/569450 co-relation queries the response was YES. [2024-06-27 23:40:49,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42388 conditions, 4593 events. 2852/4593 cut-off events. For 569300/569450 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26615 event pairs, 650 based on Foata normal form. 94/4623 useless extension candidates. Maximal degree in co-relation 42230. Up to 3996 conditions per place. [2024-06-27 23:40:49,786 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 417 selfloop transitions, 42 changer transitions 0/518 dead transitions. [2024-06-27 23:40:49,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 518 transitions, 8462 flow [2024-06-27 23:40:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:40:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:40:49,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 23:40:49,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-27 23:40:49,787 INFO L175 Difference]: Start difference. First operand has 291 places, 495 transitions, 7383 flow. Second operand 7 states and 150 transitions. [2024-06-27 23:40:49,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 518 transitions, 8462 flow [2024-06-27 23:40:50,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 518 transitions, 8288 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 23:40:51,006 INFO L231 Difference]: Finished difference. Result has 293 places, 501 transitions, 7409 flow [2024-06-27 23:40:51,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7209, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7409, PETRI_PLACES=293, PETRI_TRANSITIONS=501} [2024-06-27 23:40:51,007 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 248 predicate places. [2024-06-27 23:40:51,007 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 501 transitions, 7409 flow [2024-06-27 23:40:51,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:51,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:51,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:51,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 23:40:51,007 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:51,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:51,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1352694705, now seen corresponding path program 1 times [2024-06-27 23:40:51,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:51,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435482968] [2024-06-27 23:40:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:51,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:53,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:53,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435482968] [2024-06-27 23:40:53,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435482968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:53,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:53,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:40:53,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539079904] [2024-06-27 23:40:53,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:53,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:40:53,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:53,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:40:53,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:40:53,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:40:53,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 501 transitions, 7409 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:53,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:53,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:40:53,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:54,744 INFO L124 PetriNetUnfolderBase]: 2934/4717 cut-off events. [2024-06-27 23:40:54,744 INFO L125 PetriNetUnfolderBase]: For 502595/502595 co-relation queries the response was YES. [2024-06-27 23:40:54,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40782 conditions, 4717 events. 2934/4717 cut-off events. For 502595/502595 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 27232 event pairs, 759 based on Foata normal form. 4/4718 useless extension candidates. Maximal degree in co-relation 40621. Up to 4260 conditions per place. [2024-06-27 23:40:54,805 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 501 selfloop transitions, 21 changer transitions 0/530 dead transitions. [2024-06-27 23:40:54,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 530 transitions, 8681 flow [2024-06-27 23:40:54,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:40:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:40:54,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 23:40:54,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 23:40:54,807 INFO L175 Difference]: Start difference. First operand has 293 places, 501 transitions, 7409 flow. Second operand 10 states and 195 transitions. [2024-06-27 23:40:54,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 530 transitions, 8681 flow [2024-06-27 23:40:55,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 530 transitions, 8582 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 23:40:55,801 INFO L231 Difference]: Finished difference. Result has 298 places, 503 transitions, 7415 flow [2024-06-27 23:40:55,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7310, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7415, PETRI_PLACES=298, PETRI_TRANSITIONS=503} [2024-06-27 23:40:55,802 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-27 23:40:55,802 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 503 transitions, 7415 flow [2024-06-27 23:40:55,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:55,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:55,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:55,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 23:40:55,803 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)] === [2024-06-27 23:40:55,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:55,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1252532248, now seen corresponding path program 1 times [2024-06-27 23:40:55,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:55,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911207201] [2024-06-27 23:40:55,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:55,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:40:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:40:57,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:40:57,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911207201] [2024-06-27 23:40:57,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911207201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:40:57,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:40:57,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:40:57,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238731065] [2024-06-27 23:40:57,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:40:57,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:40:57,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:40:57,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:40:57,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:40:57,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 23:40:57,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 503 transitions, 7415 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:57,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:40:57,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 23:40:57,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:40:58,368 INFO L124 PetriNetUnfolderBase]: 2747/4428 cut-off events. [2024-06-27 23:40:58,368 INFO L125 PetriNetUnfolderBase]: For 524617/524785 co-relation queries the response was YES. [2024-06-27 23:40:58,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39273 conditions, 4428 events. 2747/4428 cut-off events. For 524617/524785 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25603 event pairs, 684 based on Foata normal form. 105/4444 useless extension candidates. Maximal degree in co-relation 39111. Up to 3924 conditions per place. [2024-06-27 23:40:58,429 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 439 selfloop transitions, 18 changer transitions 0/515 dead transitions. [2024-06-27 23:40:58,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 515 transitions, 8413 flow [2024-06-27 23:40:58,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:40:58,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:40:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 23:40:58,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 23:40:58,431 INFO L175 Difference]: Start difference. First operand has 298 places, 503 transitions, 7415 flow. Second operand 8 states and 154 transitions. [2024-06-27 23:40:58,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 515 transitions, 8413 flow [2024-06-27 23:40:59,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 515 transitions, 8311 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-27 23:40:59,484 INFO L231 Difference]: Finished difference. Result has 297 places, 506 transitions, 7405 flow [2024-06-27 23:40:59,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7313, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7405, PETRI_PLACES=297, PETRI_TRANSITIONS=506} [2024-06-27 23:40:59,485 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-27 23:40:59,485 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 506 transitions, 7405 flow [2024-06-27 23:40:59,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:40:59,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:40:59,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:40:59,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 23:40:59,486 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:40:59,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:40:59,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1018104341, now seen corresponding path program 1 times [2024-06-27 23:40:59,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:40:59,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225454573] [2024-06-27 23:40:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:40:59,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:40:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:01,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:01,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225454573] [2024-06-27 23:41:01,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225454573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:01,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:01,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:41:01,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468172834] [2024-06-27 23:41:01,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:01,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:41:01,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:01,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:41:01,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:41:01,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:41:01,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 506 transitions, 7405 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:01,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:01,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:41:01,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:03,080 INFO L124 PetriNetUnfolderBase]: 3186/4998 cut-off events. [2024-06-27 23:41:03,080 INFO L125 PetriNetUnfolderBase]: For 599144/599144 co-relation queries the response was YES. [2024-06-27 23:41:03,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45053 conditions, 4998 events. 3186/4998 cut-off events. For 599144/599144 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 28105 event pairs, 681 based on Foata normal form. 4/4993 useless extension candidates. Maximal degree in co-relation 44892. Up to 4543 conditions per place. [2024-06-27 23:41:03,146 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 465 selfloop transitions, 61 changer transitions 0/533 dead transitions. [2024-06-27 23:41:03,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 533 transitions, 8611 flow [2024-06-27 23:41:03,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:41:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:41:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 23:41:03,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-27 23:41:03,148 INFO L175 Difference]: Start difference. First operand has 297 places, 506 transitions, 7405 flow. Second operand 10 states and 192 transitions. [2024-06-27 23:41:03,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 533 transitions, 8611 flow [2024-06-27 23:41:04,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 533 transitions, 8543 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 23:41:04,290 INFO L231 Difference]: Finished difference. Result has 301 places, 508 transitions, 7523 flow [2024-06-27 23:41:04,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7337, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7523, PETRI_PLACES=301, PETRI_TRANSITIONS=508} [2024-06-27 23:41:04,291 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-27 23:41:04,291 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 508 transitions, 7523 flow [2024-06-27 23:41:04,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:04,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:04,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:04,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 23:41:04,292 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:04,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:04,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1871525675, now seen corresponding path program 2 times [2024-06-27 23:41:04,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:04,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887791460] [2024-06-27 23:41:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:04,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:06,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:06,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887791460] [2024-06-27 23:41:06,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887791460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:06,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:06,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:41:06,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102134820] [2024-06-27 23:41:06,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:06,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:41:06,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:06,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:41:06,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:41:06,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:41:06,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 508 transitions, 7523 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:06,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:06,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:41:06,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:08,120 INFO L124 PetriNetUnfolderBase]: 3203/5021 cut-off events. [2024-06-27 23:41:08,120 INFO L125 PetriNetUnfolderBase]: For 617323/617323 co-relation queries the response was YES. [2024-06-27 23:41:08,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45730 conditions, 5021 events. 3203/5021 cut-off events. For 617323/617323 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28222 event pairs, 675 based on Foata normal form. 4/5016 useless extension candidates. Maximal degree in co-relation 45568. Up to 4468 conditions per place. [2024-06-27 23:41:08,194 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 462 selfloop transitions, 69 changer transitions 0/538 dead transitions. [2024-06-27 23:41:08,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 538 transitions, 8777 flow [2024-06-27 23:41:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:41:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:41:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 23:41:08,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-27 23:41:08,196 INFO L175 Difference]: Start difference. First operand has 301 places, 508 transitions, 7523 flow. Second operand 10 states and 194 transitions. [2024-06-27 23:41:08,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 538 transitions, 8777 flow [2024-06-27 23:41:09,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 538 transitions, 8622 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 23:41:09,420 INFO L231 Difference]: Finished difference. Result has 304 places, 510 transitions, 7575 flow [2024-06-27 23:41:09,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7368, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7575, PETRI_PLACES=304, PETRI_TRANSITIONS=510} [2024-06-27 23:41:09,421 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 259 predicate places. [2024-06-27 23:41:09,421 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 510 transitions, 7575 flow [2024-06-27 23:41:09,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:09,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:09,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:09,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 23:41:09,422 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:09,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:09,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1960091435, now seen corresponding path program 3 times [2024-06-27 23:41:09,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:09,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674614277] [2024-06-27 23:41:09,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:09,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:11,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:11,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674614277] [2024-06-27 23:41:11,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674614277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:11,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:11,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:41:11,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684503127] [2024-06-27 23:41:11,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:11,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:41:11,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:11,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:41:11,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:41:11,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:41:11,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 510 transitions, 7575 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:11,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:11,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:41:11,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:13,197 INFO L124 PetriNetUnfolderBase]: 3220/5046 cut-off events. [2024-06-27 23:41:13,198 INFO L125 PetriNetUnfolderBase]: For 636400/636400 co-relation queries the response was YES. [2024-06-27 23:41:13,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46341 conditions, 5046 events. 3220/5046 cut-off events. For 636400/636400 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28412 event pairs, 646 based on Foata normal form. 4/5041 useless extension candidates. Maximal degree in co-relation 46178. Up to 4330 conditions per place. [2024-06-27 23:41:13,254 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 456 selfloop transitions, 84 changer transitions 0/547 dead transitions. [2024-06-27 23:41:13,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 547 transitions, 8890 flow [2024-06-27 23:41:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:41:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:41:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 23:41:13,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-27 23:41:13,270 INFO L175 Difference]: Start difference. First operand has 304 places, 510 transitions, 7575 flow. Second operand 11 states and 214 transitions. [2024-06-27 23:41:13,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 547 transitions, 8890 flow [2024-06-27 23:41:14,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 547 transitions, 8709 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-27 23:41:14,242 INFO L231 Difference]: Finished difference. Result has 307 places, 512 transitions, 7635 flow [2024-06-27 23:41:14,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7394, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7635, PETRI_PLACES=307, PETRI_TRANSITIONS=512} [2024-06-27 23:41:14,243 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 262 predicate places. [2024-06-27 23:41:14,243 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 512 transitions, 7635 flow [2024-06-27 23:41:14,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:14,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:14,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:14,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 23:41:14,243 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:14,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:14,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1708010845, now seen corresponding path program 4 times [2024-06-27 23:41:14,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:14,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407189750] [2024-06-27 23:41:14,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:14,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:16,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:16,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407189750] [2024-06-27 23:41:16,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407189750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:16,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:16,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:41:16,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147539674] [2024-06-27 23:41:16,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:16,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:41:16,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:41:16,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:41:16,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:41:16,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 512 transitions, 7635 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:16,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:16,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:41:16,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:17,929 INFO L124 PetriNetUnfolderBase]: 3237/5075 cut-off events. [2024-06-27 23:41:17,929 INFO L125 PetriNetUnfolderBase]: For 657382/657385 co-relation queries the response was YES. [2024-06-27 23:41:17,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46994 conditions, 5075 events. 3237/5075 cut-off events. For 657382/657385 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28628 event pairs, 714 based on Foata normal form. 4/5065 useless extension candidates. Maximal degree in co-relation 46830. Up to 4327 conditions per place. [2024-06-27 23:41:17,996 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 373 selfloop transitions, 163 changer transitions 0/543 dead transitions. [2024-06-27 23:41:17,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 543 transitions, 8960 flow [2024-06-27 23:41:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:41:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:41:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 23:41:17,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 23:41:17,997 INFO L175 Difference]: Start difference. First operand has 307 places, 512 transitions, 7635 flow. Second operand 10 states and 198 transitions. [2024-06-27 23:41:17,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 543 transitions, 8960 flow [2024-06-27 23:41:19,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 543 transitions, 8745 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-27 23:41:19,164 INFO L231 Difference]: Finished difference. Result has 308 places, 514 transitions, 7821 flow [2024-06-27 23:41:19,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7420, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7821, PETRI_PLACES=308, PETRI_TRANSITIONS=514} [2024-06-27 23:41:19,164 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-27 23:41:19,165 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 514 transitions, 7821 flow [2024-06-27 23:41:19,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:19,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:19,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:19,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 23:41:19,165 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:19,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:19,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1199029687, now seen corresponding path program 5 times [2024-06-27 23:41:19,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:19,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495914875] [2024-06-27 23:41:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:19,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:21,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:21,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495914875] [2024-06-27 23:41:21,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495914875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:21,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:21,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:41:21,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609385315] [2024-06-27 23:41:21,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:21,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:41:21,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:21,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:41:21,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:41:21,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:41:21,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 514 transitions, 7821 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:21,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:21,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:41:21,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:22,884 INFO L124 PetriNetUnfolderBase]: 3254/5102 cut-off events. [2024-06-27 23:41:22,884 INFO L125 PetriNetUnfolderBase]: For 678051/678054 co-relation queries the response was YES. [2024-06-27 23:41:22,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47755 conditions, 5102 events. 3254/5102 cut-off events. For 678051/678054 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 28777 event pairs, 719 based on Foata normal form. 4/5092 useless extension candidates. Maximal degree in co-relation 47590. Up to 4354 conditions per place. [2024-06-27 23:41:22,956 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 378 selfloop transitions, 159 changer transitions 0/544 dead transitions. [2024-06-27 23:41:22,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 544 transitions, 9136 flow [2024-06-27 23:41:22,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:41:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:41:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 23:41:22,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-27 23:41:22,958 INFO L175 Difference]: Start difference. First operand has 308 places, 514 transitions, 7821 flow. Second operand 10 states and 199 transitions. [2024-06-27 23:41:22,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 544 transitions, 9136 flow [2024-06-27 23:41:24,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 544 transitions, 8710 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-27 23:41:24,323 INFO L231 Difference]: Finished difference. Result has 309 places, 516 transitions, 7792 flow [2024-06-27 23:41:24,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7395, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7792, PETRI_PLACES=309, PETRI_TRANSITIONS=516} [2024-06-27 23:41:24,324 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-27 23:41:24,324 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 516 transitions, 7792 flow [2024-06-27 23:41:24,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:24,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:24,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:24,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 23:41:24,325 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:24,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:24,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1739193237, now seen corresponding path program 6 times [2024-06-27 23:41:24,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:24,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963013352] [2024-06-27 23:41:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:26,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:26,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963013352] [2024-06-27 23:41:26,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963013352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:26,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:26,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:41:26,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496564897] [2024-06-27 23:41:26,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:26,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:41:26,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:26,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:41:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:41:26,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:41:26,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 516 transitions, 7792 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:26,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:26,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:41:26,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:27,797 INFO L124 PetriNetUnfolderBase]: 3288/5157 cut-off events. [2024-06-27 23:41:27,798 INFO L125 PetriNetUnfolderBase]: For 697698/697701 co-relation queries the response was YES. [2024-06-27 23:41:27,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48349 conditions, 5157 events. 3288/5157 cut-off events. For 697698/697701 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29147 event pairs, 717 based on Foata normal form. 4/5147 useless extension candidates. Maximal degree in co-relation 48184. Up to 4337 conditions per place. [2024-06-27 23:41:27,869 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 379 selfloop transitions, 163 changer transitions 0/549 dead transitions. [2024-06-27 23:41:27,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 549 transitions, 9137 flow [2024-06-27 23:41:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:41:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:41:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 23:41:27,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 23:41:27,870 INFO L175 Difference]: Start difference. First operand has 309 places, 516 transitions, 7792 flow. Second operand 10 states and 200 transitions. [2024-06-27 23:41:27,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 549 transitions, 9137 flow [2024-06-27 23:41:29,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 549 transitions, 8762 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 23:41:29,297 INFO L231 Difference]: Finished difference. Result has 312 places, 520 transitions, 7853 flow [2024-06-27 23:41:29,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7417, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7853, PETRI_PLACES=312, PETRI_TRANSITIONS=520} [2024-06-27 23:41:29,298 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 267 predicate places. [2024-06-27 23:41:29,298 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 520 transitions, 7853 flow [2024-06-27 23:41:29,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:29,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:29,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:29,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 23:41:29,299 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:29,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:29,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2039609371, now seen corresponding path program 1 times [2024-06-27 23:41:29,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:29,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644458655] [2024-06-27 23:41:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:29,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:31,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:31,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644458655] [2024-06-27 23:41:31,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644458655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:31,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:31,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:41:31,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559451400] [2024-06-27 23:41:31,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:31,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:41:31,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:31,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:41:31,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:41:31,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:41:31,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 520 transitions, 7853 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:31,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:31,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:41:31,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:33,352 INFO L124 PetriNetUnfolderBase]: 3306/5192 cut-off events. [2024-06-27 23:41:33,353 INFO L125 PetriNetUnfolderBase]: For 714256/714256 co-relation queries the response was YES. [2024-06-27 23:41:33,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48908 conditions, 5192 events. 3306/5192 cut-off events. For 714256/714256 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 29478 event pairs, 677 based on Foata normal form. 3/5186 useless extension candidates. Maximal degree in co-relation 48741. Up to 4712 conditions per place. [2024-06-27 23:41:33,413 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 470 selfloop transitions, 77 changer transitions 0/554 dead transitions. [2024-06-27 23:41:33,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 554 transitions, 9165 flow [2024-06-27 23:41:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:41:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:41:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 226 transitions. [2024-06-27 23:41:33,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-27 23:41:33,415 INFO L175 Difference]: Start difference. First operand has 312 places, 520 transitions, 7853 flow. Second operand 12 states and 226 transitions. [2024-06-27 23:41:33,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 554 transitions, 9165 flow [2024-06-27 23:41:34,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 554 transitions, 8789 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 23:41:34,775 INFO L231 Difference]: Finished difference. Result has 318 places, 526 transitions, 7762 flow [2024-06-27 23:41:34,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7477, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7762, PETRI_PLACES=318, PETRI_TRANSITIONS=526} [2024-06-27 23:41:34,775 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 273 predicate places. [2024-06-27 23:41:34,775 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 526 transitions, 7762 flow [2024-06-27 23:41:34,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:34,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:34,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:34,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 23:41:34,776 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)] === [2024-06-27 23:41:34,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:34,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1733467785, now seen corresponding path program 2 times [2024-06-27 23:41:34,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:34,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242247961] [2024-06-27 23:41:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:34,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:36,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:36,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242247961] [2024-06-27 23:41:36,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242247961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:36,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:36,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:41:36,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632348618] [2024-06-27 23:41:36,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:36,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:41:36,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:36,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:41:36,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:41:36,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:41:36,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 526 transitions, 7762 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:36,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:36,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:41:36,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:38,629 INFO L124 PetriNetUnfolderBase]: 3349/5263 cut-off events. [2024-06-27 23:41:38,630 INFO L125 PetriNetUnfolderBase]: For 758708/758711 co-relation queries the response was YES. [2024-06-27 23:41:38,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50239 conditions, 5263 events. 3349/5263 cut-off events. For 758708/758711 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30057 event pairs, 745 based on Foata normal form. 2/5250 useless extension candidates. Maximal degree in co-relation 50070. Up to 3933 conditions per place. [2024-06-27 23:41:38,702 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 295 selfloop transitions, 277 changer transitions 0/579 dead transitions. [2024-06-27 23:41:38,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 579 transitions, 10304 flow [2024-06-27 23:41:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:41:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:41:38,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-27 23:41:38,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49318181818181817 [2024-06-27 23:41:38,704 INFO L175 Difference]: Start difference. First operand has 318 places, 526 transitions, 7762 flow. Second operand 10 states and 217 transitions. [2024-06-27 23:41:38,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 579 transitions, 10304 flow [2024-06-27 23:41:40,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 579 transitions, 10121 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-27 23:41:40,190 INFO L231 Difference]: Finished difference. Result has 320 places, 538 transitions, 8463 flow [2024-06-27 23:41:40,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7579, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8463, PETRI_PLACES=320, PETRI_TRANSITIONS=538} [2024-06-27 23:41:40,191 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 275 predicate places. [2024-06-27 23:41:40,191 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 538 transitions, 8463 flow [2024-06-27 23:41:40,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:40,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:40,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:40,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 23:41:40,192 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:40,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:40,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1708218607, now seen corresponding path program 3 times [2024-06-27 23:41:40,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:40,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642759501] [2024-06-27 23:41:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:40,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:42,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:42,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642759501] [2024-06-27 23:41:42,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642759501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:42,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:42,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:41:42,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256139191] [2024-06-27 23:41:42,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:42,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:41:42,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:41:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:41:42,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:41:42,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 538 transitions, 8463 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:42,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:42,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:41:42,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:43,709 INFO L124 PetriNetUnfolderBase]: 3360/5284 cut-off events. [2024-06-27 23:41:43,709 INFO L125 PetriNetUnfolderBase]: For 783765/783768 co-relation queries the response was YES. [2024-06-27 23:41:43,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51664 conditions, 5284 events. 3360/5284 cut-off events. For 783765/783768 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30234 event pairs, 745 based on Foata normal form. 2/5271 useless extension candidates. Maximal degree in co-relation 51492. Up to 3945 conditions per place. [2024-06-27 23:41:43,782 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 307 selfloop transitions, 270 changer transitions 0/584 dead transitions. [2024-06-27 23:41:43,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 584 transitions, 10836 flow [2024-06-27 23:41:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:41:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:41:43,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-27 23:41:43,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-27 23:41:43,783 INFO L175 Difference]: Start difference. First operand has 320 places, 538 transitions, 8463 flow. Second operand 10 states and 218 transitions. [2024-06-27 23:41:43,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 584 transitions, 10836 flow [2024-06-27 23:41:45,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 584 transitions, 10679 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-27 23:41:45,219 INFO L231 Difference]: Finished difference. Result has 327 places, 541 transitions, 8942 flow [2024-06-27 23:41:45,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8326, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8942, PETRI_PLACES=327, PETRI_TRANSITIONS=541} [2024-06-27 23:41:45,220 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 282 predicate places. [2024-06-27 23:41:45,220 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 541 transitions, 8942 flow [2024-06-27 23:41:45,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:45,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:45,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:45,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 23:41:45,221 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:45,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:45,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1739039415, now seen corresponding path program 4 times [2024-06-27 23:41:45,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:45,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345035024] [2024-06-27 23:41:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:45,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:47,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:47,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345035024] [2024-06-27 23:41:47,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345035024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:47,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:47,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:41:47,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926310922] [2024-06-27 23:41:47,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:47,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:41:47,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:41:47,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:41:47,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:41:47,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 541 transitions, 8942 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:47,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:47,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:41:47,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:49,305 INFO L124 PetriNetUnfolderBase]: 3376/5312 cut-off events. [2024-06-27 23:41:49,306 INFO L125 PetriNetUnfolderBase]: For 808459/808462 co-relation queries the response was YES. [2024-06-27 23:41:49,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52799 conditions, 5312 events. 3376/5312 cut-off events. For 808459/808462 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 30520 event pairs, 747 based on Foata normal form. 3/5300 useless extension candidates. Maximal degree in co-relation 52623. Up to 3961 conditions per place. [2024-06-27 23:41:49,375 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 319 selfloop transitions, 265 changer transitions 0/591 dead transitions. [2024-06-27 23:41:49,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 591 transitions, 11373 flow [2024-06-27 23:41:49,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:41:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:41:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-27 23:41:49,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48760330578512395 [2024-06-27 23:41:49,377 INFO L175 Difference]: Start difference. First operand has 327 places, 541 transitions, 8942 flow. Second operand 11 states and 236 transitions. [2024-06-27 23:41:49,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 591 transitions, 11373 flow [2024-06-27 23:41:50,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 591 transitions, 10931 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 23:41:50,979 INFO L231 Difference]: Finished difference. Result has 334 places, 547 transitions, 9168 flow [2024-06-27 23:41:50,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8503, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9168, PETRI_PLACES=334, PETRI_TRANSITIONS=547} [2024-06-27 23:41:50,980 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-27 23:41:50,980 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 547 transitions, 9168 flow [2024-06-27 23:41:50,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:50,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:50,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:50,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 23:41:50,981 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:50,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:50,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1733677035, now seen corresponding path program 5 times [2024-06-27 23:41:50,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:50,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083891144] [2024-06-27 23:41:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:50,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:53,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:53,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083891144] [2024-06-27 23:41:53,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083891144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:53,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:53,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:41:53,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781464506] [2024-06-27 23:41:53,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:53,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:41:53,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:53,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:41:53,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:41:53,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:41:53,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 547 transitions, 9168 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:53,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:53,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:41:53,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:55,219 INFO L124 PetriNetUnfolderBase]: 3376/5312 cut-off events. [2024-06-27 23:41:55,219 INFO L125 PetriNetUnfolderBase]: For 845062/845065 co-relation queries the response was YES. [2024-06-27 23:41:55,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53527 conditions, 5312 events. 3376/5312 cut-off events. For 845062/845065 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 30491 event pairs, 745 based on Foata normal form. 3/5300 useless extension candidates. Maximal degree in co-relation 53347. Up to 3963 conditions per place. [2024-06-27 23:41:55,309 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 318 selfloop transitions, 269 changer transitions 0/594 dead transitions. [2024-06-27 23:41:55,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 594 transitions, 11304 flow [2024-06-27 23:41:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:41:55,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:41:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-27 23:41:55,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48140495867768596 [2024-06-27 23:41:55,311 INFO L175 Difference]: Start difference. First operand has 334 places, 547 transitions, 9168 flow. Second operand 11 states and 233 transitions. [2024-06-27 23:41:55,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 594 transitions, 11304 flow [2024-06-27 23:41:56,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 594 transitions, 10738 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-27 23:41:56,584 INFO L231 Difference]: Finished difference. Result has 340 places, 550 transitions, 9214 flow [2024-06-27 23:41:56,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8602, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9214, PETRI_PLACES=340, PETRI_TRANSITIONS=550} [2024-06-27 23:41:56,585 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-27 23:41:56,585 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 550 transitions, 9214 flow [2024-06-27 23:41:56,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:56,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:41:56,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:41:56,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 23:41:56,586 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:41:56,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:41:56,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1480111872, now seen corresponding path program 1 times [2024-06-27 23:41:56,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:41:56,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658861205] [2024-06-27 23:41:56,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:41:56,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:41:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:41:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:41:57,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:41:57,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658861205] [2024-06-27 23:41:57,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658861205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:41:57,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:41:57,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:41:57,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321752510] [2024-06-27 23:41:57,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:41:57,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:41:57,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:41:57,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:41:57,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:41:57,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:41:57,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 550 transitions, 9214 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:41:57,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:41:57,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:41:57,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:41:59,147 INFO L124 PetriNetUnfolderBase]: 3225/5168 cut-off events. [2024-06-27 23:41:59,148 INFO L125 PetriNetUnfolderBase]: For 881481/881484 co-relation queries the response was YES. [2024-06-27 23:41:59,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53042 conditions, 5168 events. 3225/5168 cut-off events. For 881481/881484 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30375 event pairs, 668 based on Foata normal form. 4/5159 useless extension candidates. Maximal degree in co-relation 52859. Up to 4402 conditions per place. [2024-06-27 23:41:59,228 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 433 selfloop transitions, 92 changer transitions 0/570 dead transitions. [2024-06-27 23:41:59,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 570 transitions, 10416 flow [2024-06-27 23:41:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:41:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:41:59,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-27 23:41:59,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-06-27 23:41:59,229 INFO L175 Difference]: Start difference. First operand has 340 places, 550 transitions, 9214 flow. Second operand 7 states and 152 transitions. [2024-06-27 23:41:59,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 570 transitions, 10416 flow [2024-06-27 23:42:01,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 570 transitions, 9845 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 23:42:01,160 INFO L231 Difference]: Finished difference. Result has 339 places, 554 transitions, 8925 flow [2024-06-27 23:42:01,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8643, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8925, PETRI_PLACES=339, PETRI_TRANSITIONS=554} [2024-06-27 23:42:01,161 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-27 23:42:01,161 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 554 transitions, 8925 flow [2024-06-27 23:42:01,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:01,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:01,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:01,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 23:42:01,162 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:01,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:01,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1480123962, now seen corresponding path program 2 times [2024-06-27 23:42:01,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:01,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073317474] [2024-06-27 23:42:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:01,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:02,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:02,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073317474] [2024-06-27 23:42:02,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073317474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:02,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:02,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:42:02,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122046366] [2024-06-27 23:42:02,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:02,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:42:02,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:02,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:42:02,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:42:02,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:42:02,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 554 transitions, 8925 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:02,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:02,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:42:02,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:03,869 INFO L124 PetriNetUnfolderBase]: 3230/5182 cut-off events. [2024-06-27 23:42:03,869 INFO L125 PetriNetUnfolderBase]: For 903477/903480 co-relation queries the response was YES. [2024-06-27 23:42:03,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53461 conditions, 5182 events. 3230/5182 cut-off events. For 903477/903480 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30554 event pairs, 670 based on Foata normal form. 4/5173 useless extension candidates. Maximal degree in co-relation 53277. Up to 4368 conditions per place. [2024-06-27 23:42:03,949 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 437 selfloop transitions, 94 changer transitions 0/576 dead transitions. [2024-06-27 23:42:03,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 576 transitions, 10383 flow [2024-06-27 23:42:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:42:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:42:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 23:42:03,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-27 23:42:03,951 INFO L175 Difference]: Start difference. First operand has 339 places, 554 transitions, 8925 flow. Second operand 7 states and 150 transitions. [2024-06-27 23:42:03,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 576 transitions, 10383 flow [2024-06-27 23:42:05,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 576 transitions, 10185 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-27 23:42:05,836 INFO L231 Difference]: Finished difference. Result has 343 places, 561 transitions, 9089 flow [2024-06-27 23:42:05,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8727, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9089, PETRI_PLACES=343, PETRI_TRANSITIONS=561} [2024-06-27 23:42:05,837 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-27 23:42:05,837 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 561 transitions, 9089 flow [2024-06-27 23:42:05,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:05,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:05,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:05,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 23:42:05,837 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)] === [2024-06-27 23:42:05,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:05,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1480124396, now seen corresponding path program 1 times [2024-06-27 23:42:05,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:05,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222365889] [2024-06-27 23:42:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:05,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:07,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:07,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222365889] [2024-06-27 23:42:07,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222365889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:07,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:07,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:42:07,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801205451] [2024-06-27 23:42:07,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:07,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:42:07,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:07,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:42:07,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:42:07,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:42:07,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 561 transitions, 9089 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:07,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:07,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:42:07,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:08,567 INFO L124 PetriNetUnfolderBase]: 3191/5081 cut-off events. [2024-06-27 23:42:08,567 INFO L125 PetriNetUnfolderBase]: For 939959/940109 co-relation queries the response was YES. [2024-06-27 23:42:08,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53379 conditions, 5081 events. 3191/5081 cut-off events. For 939959/940109 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29698 event pairs, 678 based on Foata normal form. 93/5106 useless extension candidates. Maximal degree in co-relation 53194. Up to 4488 conditions per place. [2024-06-27 23:42:08,637 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 468 selfloop transitions, 43 changer transitions 0/576 dead transitions. [2024-06-27 23:42:08,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 576 transitions, 10213 flow [2024-06-27 23:42:08,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:42:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:42:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 23:42:08,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-27 23:42:08,638 INFO L175 Difference]: Start difference. First operand has 343 places, 561 transitions, 9089 flow. Second operand 7 states and 141 transitions. [2024-06-27 23:42:08,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 576 transitions, 10213 flow [2024-06-27 23:42:10,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 576 transitions, 10069 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-27 23:42:10,544 INFO L231 Difference]: Finished difference. Result has 348 places, 564 transitions, 9096 flow [2024-06-27 23:42:10,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8945, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9096, PETRI_PLACES=348, PETRI_TRANSITIONS=564} [2024-06-27 23:42:10,545 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 303 predicate places. [2024-06-27 23:42:10,545 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 564 transitions, 9096 flow [2024-06-27 23:42:10,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:10,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:10,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:10,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 23:42:10,545 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:10,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:10,546 INFO L85 PathProgramCache]: Analyzing trace with hash 749887257, now seen corresponding path program 7 times [2024-06-27 23:42:10,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:10,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98275787] [2024-06-27 23:42:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:10,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:12,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:12,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98275787] [2024-06-27 23:42:12,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98275787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:12,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:12,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:42:12,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582507379] [2024-06-27 23:42:12,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:12,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:42:12,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:12,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:42:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:42:12,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:42:12,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 564 transitions, 9096 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:12,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:12,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:42:12,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:14,207 INFO L124 PetriNetUnfolderBase]: 3446/5403 cut-off events. [2024-06-27 23:42:14,208 INFO L125 PetriNetUnfolderBase]: For 956660/956660 co-relation queries the response was YES. [2024-06-27 23:42:14,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56498 conditions, 5403 events. 3446/5403 cut-off events. For 956660/956660 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 30878 event pairs, 653 based on Foata normal form. 4/5394 useless extension candidates. Maximal degree in co-relation 56311. Up to 4628 conditions per place. [2024-06-27 23:42:14,292 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 411 selfloop transitions, 175 changer transitions 0/594 dead transitions. [2024-06-27 23:42:14,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 594 transitions, 10535 flow [2024-06-27 23:42:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:42:14,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:42:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 23:42:14,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-27 23:42:14,293 INFO L175 Difference]: Start difference. First operand has 348 places, 564 transitions, 9096 flow. Second operand 10 states and 194 transitions. [2024-06-27 23:42:14,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 594 transitions, 10535 flow [2024-06-27 23:42:16,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 594 transitions, 10404 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 23:42:16,140 INFO L231 Difference]: Finished difference. Result has 352 places, 566 transitions, 9405 flow [2024-06-27 23:42:16,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8965, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9405, PETRI_PLACES=352, PETRI_TRANSITIONS=566} [2024-06-27 23:42:16,141 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 307 predicate places. [2024-06-27 23:42:16,141 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 566 transitions, 9405 flow [2024-06-27 23:42:16,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:16,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:16,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:16,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 23:42:16,142 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:16,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:16,142 INFO L85 PathProgramCache]: Analyzing trace with hash 971589845, now seen corresponding path program 8 times [2024-06-27 23:42:16,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:16,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678686175] [2024-06-27 23:42:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:16,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:18,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:18,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678686175] [2024-06-27 23:42:18,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678686175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:18,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:18,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:42:18,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323249543] [2024-06-27 23:42:18,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:18,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:42:18,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:18,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:42:18,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:42:18,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:42:18,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 566 transitions, 9405 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:18,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:18,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:42:18,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:19,974 INFO L124 PetriNetUnfolderBase]: 3463/5434 cut-off events. [2024-06-27 23:42:19,974 INFO L125 PetriNetUnfolderBase]: For 983465/983465 co-relation queries the response was YES. [2024-06-27 23:42:20,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57613 conditions, 5434 events. 3463/5434 cut-off events. For 983465/983465 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 31138 event pairs, 651 based on Foata normal form. 4/5425 useless extension candidates. Maximal degree in co-relation 57425. Up to 4655 conditions per place. [2024-06-27 23:42:20,054 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 430 selfloop transitions, 160 changer transitions 0/598 dead transitions. [2024-06-27 23:42:20,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 598 transitions, 10895 flow [2024-06-27 23:42:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:42:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:42:20,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:42:20,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 23:42:20,056 INFO L175 Difference]: Start difference. First operand has 352 places, 566 transitions, 9405 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:42:20,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 598 transitions, 10895 flow [2024-06-27 23:42:21,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 598 transitions, 10377 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-27 23:42:21,553 INFO L231 Difference]: Finished difference. Result has 354 places, 568 transitions, 9301 flow [2024-06-27 23:42:21,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8887, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9301, PETRI_PLACES=354, PETRI_TRANSITIONS=568} [2024-06-27 23:42:21,554 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 309 predicate places. [2024-06-27 23:42:21,554 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 568 transitions, 9301 flow [2024-06-27 23:42:21,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:21,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:21,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:21,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 23:42:21,555 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:21,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash 966227465, now seen corresponding path program 9 times [2024-06-27 23:42:21,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:21,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385938829] [2024-06-27 23:42:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:21,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:23,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:23,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385938829] [2024-06-27 23:42:23,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385938829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:23,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:23,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:42:23,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670146727] [2024-06-27 23:42:23,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:23,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:42:23,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:23,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:42:23,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:42:23,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:42:23,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 568 transitions, 9301 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:23,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:23,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:42:23,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:25,311 INFO L124 PetriNetUnfolderBase]: 3480/5463 cut-off events. [2024-06-27 23:42:25,311 INFO L125 PetriNetUnfolderBase]: For 1006461/1006461 co-relation queries the response was YES. [2024-06-27 23:42:25,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58021 conditions, 5463 events. 3480/5463 cut-off events. For 1006461/1006461 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 31392 event pairs, 661 based on Foata normal form. 4/5454 useless extension candidates. Maximal degree in co-relation 57833. Up to 4682 conditions per place. [2024-06-27 23:42:25,396 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 428 selfloop transitions, 162 changer transitions 0/598 dead transitions. [2024-06-27 23:42:25,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 598 transitions, 10758 flow [2024-06-27 23:42:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:42:25,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:42:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 23:42:25,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 23:42:25,398 INFO L175 Difference]: Start difference. First operand has 354 places, 568 transitions, 9301 flow. Second operand 10 states and 195 transitions. [2024-06-27 23:42:25,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 598 transitions, 10758 flow [2024-06-27 23:42:27,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 598 transitions, 10343 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-27 23:42:27,330 INFO L231 Difference]: Finished difference. Result has 355 places, 570 transitions, 9308 flow [2024-06-27 23:42:27,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8886, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9308, PETRI_PLACES=355, PETRI_TRANSITIONS=570} [2024-06-27 23:42:27,330 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 310 predicate places. [2024-06-27 23:42:27,330 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 570 transitions, 9308 flow [2024-06-27 23:42:27,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:27,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:27,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:27,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 23:42:27,331 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:27,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:27,333 INFO L85 PathProgramCache]: Analyzing trace with hash 966079595, now seen corresponding path program 10 times [2024-06-27 23:42:27,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:27,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273208061] [2024-06-27 23:42:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:27,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:29,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:29,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273208061] [2024-06-27 23:42:29,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273208061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:29,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:29,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:42:29,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866586659] [2024-06-27 23:42:29,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:29,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:42:29,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:29,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:42:29,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:42:29,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:42:29,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 570 transitions, 9308 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:29,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:29,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:42:29,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:31,152 INFO L124 PetriNetUnfolderBase]: 3514/5518 cut-off events. [2024-06-27 23:42:31,153 INFO L125 PetriNetUnfolderBase]: For 1029728/1029728 co-relation queries the response was YES. [2024-06-27 23:42:31,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58668 conditions, 5518 events. 3514/5518 cut-off events. For 1029728/1029728 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 31748 event pairs, 664 based on Foata normal form. 4/5509 useless extension candidates. Maximal degree in co-relation 58480. Up to 4650 conditions per place. [2024-06-27 23:42:31,228 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 426 selfloop transitions, 169 changer transitions 0/603 dead transitions. [2024-06-27 23:42:31,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 603 transitions, 10799 flow [2024-06-27 23:42:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:42:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:42:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 23:42:31,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 23:42:31,230 INFO L175 Difference]: Start difference. First operand has 355 places, 570 transitions, 9308 flow. Second operand 10 states and 196 transitions. [2024-06-27 23:42:31,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 603 transitions, 10799 flow [2024-06-27 23:42:33,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 603 transitions, 10397 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 23:42:33,053 INFO L231 Difference]: Finished difference. Result has 358 places, 574 transitions, 9379 flow [2024-06-27 23:42:33,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8906, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9379, PETRI_PLACES=358, PETRI_TRANSITIONS=574} [2024-06-27 23:42:33,054 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-27 23:42:33,054 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 574 transitions, 9379 flow [2024-06-27 23:42:33,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:33,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:33,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:33,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 23:42:33,055 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:33,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:33,055 INFO L85 PathProgramCache]: Analyzing trace with hash -553403145, now seen corresponding path program 6 times [2024-06-27 23:42:33,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:33,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933145075] [2024-06-27 23:42:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:33,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:35,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:35,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933145075] [2024-06-27 23:42:35,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933145075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:35,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:35,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:42:35,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633497251] [2024-06-27 23:42:35,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:35,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:42:35,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:35,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:42:35,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:42:35,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:42:35,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 574 transitions, 9379 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:35,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:35,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:42:35,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:37,071 INFO L124 PetriNetUnfolderBase]: 3546/5569 cut-off events. [2024-06-27 23:42:37,072 INFO L125 PetriNetUnfolderBase]: For 1056323/1056323 co-relation queries the response was YES. [2024-06-27 23:42:37,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59594 conditions, 5569 events. 3546/5569 cut-off events. For 1056323/1056323 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 32130 event pairs, 663 based on Foata normal form. 3/5559 useless extension candidates. Maximal degree in co-relation 59404. Up to 4198 conditions per place. [2024-06-27 23:42:37,171 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 326 selfloop transitions, 289 changer transitions 0/623 dead transitions. [2024-06-27 23:42:37,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 623 transitions, 11752 flow [2024-06-27 23:42:37,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:42:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:42:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-27 23:42:37,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4690082644628099 [2024-06-27 23:42:37,174 INFO L175 Difference]: Start difference. First operand has 358 places, 574 transitions, 9379 flow. Second operand 11 states and 227 transitions. [2024-06-27 23:42:37,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 623 transitions, 11752 flow [2024-06-27 23:42:39,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 623 transitions, 11341 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 23:42:39,339 INFO L231 Difference]: Finished difference. Result has 363 places, 583 transitions, 9803 flow [2024-06-27 23:42:39,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8968, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9803, PETRI_PLACES=363, PETRI_TRANSITIONS=583} [2024-06-27 23:42:39,340 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 318 predicate places. [2024-06-27 23:42:39,340 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 583 transitions, 9803 flow [2024-06-27 23:42:39,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:39,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:39,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:39,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 23:42:39,341 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:39,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:39,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1545813581, now seen corresponding path program 7 times [2024-06-27 23:42:39,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:39,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707326448] [2024-06-27 23:42:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:39,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:41,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:41,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707326448] [2024-06-27 23:42:41,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707326448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:41,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:41,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:42:41,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602197051] [2024-06-27 23:42:41,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:41,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:42:41,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:41,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:42:41,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:42:41,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:42:41,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 583 transitions, 9803 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:41,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:41,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:42:41,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:43,198 INFO L124 PetriNetUnfolderBase]: 3573/5615 cut-off events. [2024-06-27 23:42:43,199 INFO L125 PetriNetUnfolderBase]: For 1107173/1107173 co-relation queries the response was YES. [2024-06-27 23:42:43,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61175 conditions, 5615 events. 3573/5615 cut-off events. For 1107173/1107173 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32471 event pairs, 663 based on Foata normal form. 2/5604 useless extension candidates. Maximal degree in co-relation 60982. Up to 4230 conditions per place. [2024-06-27 23:42:43,285 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 304 selfloop transitions, 314 changer transitions 0/626 dead transitions. [2024-06-27 23:42:43,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 626 transitions, 12106 flow [2024-06-27 23:42:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:42:43,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:42:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 23:42:43,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:42:43,287 INFO L175 Difference]: Start difference. First operand has 363 places, 583 transitions, 9803 flow. Second operand 10 states and 210 transitions. [2024-06-27 23:42:43,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 626 transitions, 12106 flow [2024-06-27 23:42:45,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 626 transitions, 11536 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-06-27 23:42:45,263 INFO L231 Difference]: Finished difference. Result has 366 places, 589 transitions, 10054 flow [2024-06-27 23:42:45,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9279, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10054, PETRI_PLACES=366, PETRI_TRANSITIONS=589} [2024-06-27 23:42:45,264 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 321 predicate places. [2024-06-27 23:42:45,264 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 589 transitions, 10054 flow [2024-06-27 23:42:45,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:45,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:45,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:45,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 23:42:45,265 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:45,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:45,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1752467021, now seen corresponding path program 8 times [2024-06-27 23:42:45,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:45,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331013547] [2024-06-27 23:42:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:45,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:47,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:47,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331013547] [2024-06-27 23:42:47,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331013547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:47,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:47,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:42:47,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471526059] [2024-06-27 23:42:47,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:47,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:42:47,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:47,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:42:47,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:42:47,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:42:47,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 589 transitions, 10054 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:47,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:47,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:42:47,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:49,043 INFO L124 PetriNetUnfolderBase]: 3584/5644 cut-off events. [2024-06-27 23:42:49,043 INFO L125 PetriNetUnfolderBase]: For 1132171/1132171 co-relation queries the response was YES. [2024-06-27 23:42:49,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61571 conditions, 5644 events. 3584/5644 cut-off events. For 1132171/1132171 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32834 event pairs, 674 based on Foata normal form. 2/5633 useless extension candidates. Maximal degree in co-relation 61376. Up to 4242 conditions per place. [2024-06-27 23:42:49,131 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 337 selfloop transitions, 286 changer transitions 0/631 dead transitions. [2024-06-27 23:42:49,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 631 transitions, 12317 flow [2024-06-27 23:42:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:42:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:42:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-27 23:42:49,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-27 23:42:49,133 INFO L175 Difference]: Start difference. First operand has 366 places, 589 transitions, 10054 flow. Second operand 10 states and 212 transitions. [2024-06-27 23:42:49,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 631 transitions, 12317 flow [2024-06-27 23:42:51,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 631 transitions, 11768 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 23:42:51,119 INFO L231 Difference]: Finished difference. Result has 370 places, 592 transitions, 10176 flow [2024-06-27 23:42:51,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9514, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10176, PETRI_PLACES=370, PETRI_TRANSITIONS=592} [2024-06-27 23:42:51,120 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 325 predicate places. [2024-06-27 23:42:51,120 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 592 transitions, 10176 flow [2024-06-27 23:42:51,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:51,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:51,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:51,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 23:42:51,121 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:51,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:51,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1747104641, now seen corresponding path program 9 times [2024-06-27 23:42:51,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:51,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809072200] [2024-06-27 23:42:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:51,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:53,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:53,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809072200] [2024-06-27 23:42:53,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809072200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:53,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:53,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:42:53,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090438776] [2024-06-27 23:42:53,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:53,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:42:53,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:53,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:42:53,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:42:53,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:42:53,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 592 transitions, 10176 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:53,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:53,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:42:53,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:42:55,058 INFO L124 PetriNetUnfolderBase]: 3595/5663 cut-off events. [2024-06-27 23:42:55,059 INFO L125 PetriNetUnfolderBase]: For 1159329/1159329 co-relation queries the response was YES. [2024-06-27 23:42:55,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61909 conditions, 5663 events. 3595/5663 cut-off events. For 1159329/1159329 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32973 event pairs, 672 based on Foata normal form. 2/5652 useless extension candidates. Maximal degree in co-relation 61711. Up to 4254 conditions per place. [2024-06-27 23:42:55,141 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 359 selfloop transitions, 277 changer transitions 0/644 dead transitions. [2024-06-27 23:42:55,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 644 transitions, 12937 flow [2024-06-27 23:42:55,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:42:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:42:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-27 23:42:55,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49318181818181817 [2024-06-27 23:42:55,143 INFO L175 Difference]: Start difference. First operand has 370 places, 592 transitions, 10176 flow. Second operand 10 states and 217 transitions. [2024-06-27 23:42:55,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 644 transitions, 12937 flow [2024-06-27 23:42:57,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 644 transitions, 12480 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 23:42:57,229 INFO L231 Difference]: Finished difference. Result has 373 places, 595 transitions, 10369 flow [2024-06-27 23:42:57,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9734, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10369, PETRI_PLACES=373, PETRI_TRANSITIONS=595} [2024-06-27 23:42:57,229 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 328 predicate places. [2024-06-27 23:42:57,230 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 595 transitions, 10369 flow [2024-06-27 23:42:57,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:57,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:42:57,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:42:57,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 23:42:57,230 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:42:57,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:42:57,231 INFO L85 PathProgramCache]: Analyzing trace with hash -829297411, now seen corresponding path program 10 times [2024-06-27 23:42:57,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:42:57,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634180205] [2024-06-27 23:42:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:42:57,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:42:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:42:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:42:59,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:42:59,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634180205] [2024-06-27 23:42:59,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634180205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:42:59,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:42:59,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:42:59,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658122661] [2024-06-27 23:42:59,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:42:59,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:42:59,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:42:59,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:42:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:42:59,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:42:59,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 595 transitions, 10369 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:42:59,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:42:59,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:42:59,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:01,217 INFO L124 PetriNetUnfolderBase]: 3606/5678 cut-off events. [2024-06-27 23:43:01,217 INFO L125 PetriNetUnfolderBase]: For 1186370/1186370 co-relation queries the response was YES. [2024-06-27 23:43:01,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62243 conditions, 5678 events. 3606/5678 cut-off events. For 1186370/1186370 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33050 event pairs, 663 based on Foata normal form. 2/5667 useless extension candidates. Maximal degree in co-relation 62043. Up to 4266 conditions per place. [2024-06-27 23:43:01,303 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 308 selfloop transitions, 321 changer transitions 0/637 dead transitions. [2024-06-27 23:43:01,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 637 transitions, 12643 flow [2024-06-27 23:43:01,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:43:01,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:43:01,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-27 23:43:01,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-27 23:43:01,305 INFO L175 Difference]: Start difference. First operand has 373 places, 595 transitions, 10369 flow. Second operand 10 states and 211 transitions. [2024-06-27 23:43:01,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 637 transitions, 12643 flow [2024-06-27 23:43:03,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 637 transitions, 11852 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 23:43:03,335 INFO L231 Difference]: Finished difference. Result has 374 places, 598 transitions, 10307 flow [2024-06-27 23:43:03,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9587, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10307, PETRI_PLACES=374, PETRI_TRANSITIONS=598} [2024-06-27 23:43:03,336 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-27 23:43:03,336 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 598 transitions, 10307 flow [2024-06-27 23:43:03,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:03,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:03,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:03,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 23:43:03,336 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:03,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:03,337 INFO L85 PathProgramCache]: Analyzing trace with hash -829037941, now seen corresponding path program 11 times [2024-06-27 23:43:03,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:03,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177968170] [2024-06-27 23:43:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:03,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:05,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:05,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177968170] [2024-06-27 23:43:05,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177968170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:05,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:05,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:43:05,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083187732] [2024-06-27 23:43:05,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:05,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:43:05,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:43:05,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:43:05,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:43:05,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 598 transitions, 10307 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:05,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:05,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:43:05,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:07,960 INFO L124 PetriNetUnfolderBase]: 3614/5689 cut-off events. [2024-06-27 23:43:07,960 INFO L125 PetriNetUnfolderBase]: For 1205011/1205011 co-relation queries the response was YES. [2024-06-27 23:43:08,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62651 conditions, 5689 events. 3614/5689 cut-off events. For 1205011/1205011 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33121 event pairs, 663 based on Foata normal form. 3/5679 useless extension candidates. Maximal degree in co-relation 62449. Up to 4201 conditions per place. [2024-06-27 23:43:08,047 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 246 selfloop transitions, 387 changer transitions 0/641 dead transitions. [2024-06-27 23:43:08,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 641 transitions, 12452 flow [2024-06-27 23:43:08,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 23:43:08,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 23:43:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 256 transitions. [2024-06-27 23:43:08,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44755244755244755 [2024-06-27 23:43:08,049 INFO L175 Difference]: Start difference. First operand has 374 places, 598 transitions, 10307 flow. Second operand 13 states and 256 transitions. [2024-06-27 23:43:08,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 641 transitions, 12452 flow [2024-06-27 23:43:10,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 641 transitions, 11902 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 23:43:10,723 INFO L231 Difference]: Finished difference. Result has 383 places, 604 transitions, 10695 flow [2024-06-27 23:43:10,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9757, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10695, PETRI_PLACES=383, PETRI_TRANSITIONS=604} [2024-06-27 23:43:10,724 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-27 23:43:10,724 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 604 transitions, 10695 flow [2024-06-27 23:43:10,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:10,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:10,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:10,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 23:43:10,740 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:10,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:10,741 INFO L85 PathProgramCache]: Analyzing trace with hash 971805047, now seen corresponding path program 12 times [2024-06-27 23:43:10,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:10,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711755110] [2024-06-27 23:43:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:10,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:12,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:12,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711755110] [2024-06-27 23:43:12,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711755110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:12,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:12,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:43:12,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699463160] [2024-06-27 23:43:12,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:12,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:43:12,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:12,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:43:12,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:43:13,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:43:13,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 604 transitions, 10695 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:13,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:13,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:43:13,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:15,066 INFO L124 PetriNetUnfolderBase]: 3625/5716 cut-off events. [2024-06-27 23:43:15,066 INFO L125 PetriNetUnfolderBase]: For 1256745/1256745 co-relation queries the response was YES. [2024-06-27 23:43:15,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63927 conditions, 5716 events. 3625/5716 cut-off events. For 1256745/1256745 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 33459 event pairs, 672 based on Foata normal form. 2/5705 useless extension candidates. Maximal degree in co-relation 63721. Up to 4291 conditions per place. [2024-06-27 23:43:15,160 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 355 selfloop transitions, 289 changer transitions 0/652 dead transitions. [2024-06-27 23:43:15,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 652 transitions, 13435 flow [2024-06-27 23:43:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:43:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:43:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-27 23:43:15,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-27 23:43:15,162 INFO L175 Difference]: Start difference. First operand has 383 places, 604 transitions, 10695 flow. Second operand 10 states and 215 transitions. [2024-06-27 23:43:15,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 652 transitions, 13435 flow [2024-06-27 23:43:17,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 652 transitions, 13069 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-27 23:43:17,778 INFO L231 Difference]: Finished difference. Result has 386 places, 607 transitions, 10994 flow [2024-06-27 23:43:17,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10333, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10994, PETRI_PLACES=386, PETRI_TRANSITIONS=607} [2024-06-27 23:43:17,779 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-27 23:43:17,779 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 607 transitions, 10994 flow [2024-06-27 23:43:17,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:17,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:17,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:17,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 23:43:17,779 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:17,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:17,780 INFO L85 PathProgramCache]: Analyzing trace with hash -553201335, now seen corresponding path program 13 times [2024-06-27 23:43:17,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:17,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942662075] [2024-06-27 23:43:17,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:17,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:19,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:19,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942662075] [2024-06-27 23:43:19,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942662075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:19,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:19,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:43:19,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846111771] [2024-06-27 23:43:19,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:19,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:43:19,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:19,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:43:19,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:43:20,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:43:20,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 607 transitions, 10994 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:20,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:20,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:43:20,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:22,077 INFO L124 PetriNetUnfolderBase]: 3641/5741 cut-off events. [2024-06-27 23:43:22,078 INFO L125 PetriNetUnfolderBase]: For 1286199/1286199 co-relation queries the response was YES. [2024-06-27 23:43:22,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64754 conditions, 5741 events. 3641/5741 cut-off events. For 1286199/1286199 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 33622 event pairs, 663 based on Foata normal form. 3/5731 useless extension candidates. Maximal degree in co-relation 64545. Up to 4307 conditions per place. [2024-06-27 23:43:22,168 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 346 selfloop transitions, 304 changer transitions 0/658 dead transitions. [2024-06-27 23:43:22,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 658 transitions, 13488 flow [2024-06-27 23:43:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:43:22,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:43:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-27 23:43:22,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731404958677686 [2024-06-27 23:43:22,170 INFO L175 Difference]: Start difference. First operand has 386 places, 607 transitions, 10994 flow. Second operand 11 states and 229 transitions. [2024-06-27 23:43:22,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 658 transitions, 13488 flow [2024-06-27 23:43:24,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 658 transitions, 12928 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 23:43:24,732 INFO L231 Difference]: Finished difference. Result has 392 places, 613 transitions, 11203 flow [2024-06-27 23:43:24,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10440, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11203, PETRI_PLACES=392, PETRI_TRANSITIONS=613} [2024-06-27 23:43:24,733 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-27 23:43:24,733 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 613 transitions, 11203 flow [2024-06-27 23:43:24,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:24,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:24,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:24,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 23:43:24,733 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:24,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1165744457, now seen corresponding path program 14 times [2024-06-27 23:43:24,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:24,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733370140] [2024-06-27 23:43:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:24,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:26,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:26,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733370140] [2024-06-27 23:43:26,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733370140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:26,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:26,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:43:26,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717844879] [2024-06-27 23:43:26,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:26,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:43:26,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:26,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:43:26,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:43:26,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:43:26,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 613 transitions, 11203 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:26,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:26,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:43:26,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:28,935 INFO L124 PetriNetUnfolderBase]: 3636/5734 cut-off events. [2024-06-27 23:43:28,936 INFO L125 PetriNetUnfolderBase]: For 1324974/1324974 co-relation queries the response was YES. [2024-06-27 23:43:28,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65153 conditions, 5734 events. 3636/5734 cut-off events. For 1324974/1324974 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 33596 event pairs, 663 based on Foata normal form. 2/5723 useless extension candidates. Maximal degree in co-relation 64940. Up to 4305 conditions per place. [2024-06-27 23:43:29,030 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 342 selfloop transitions, 303 changer transitions 0/653 dead transitions. [2024-06-27 23:43:29,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 653 transitions, 13168 flow [2024-06-27 23:43:29,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:43:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:43:29,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 23:43:29,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:43:29,032 INFO L175 Difference]: Start difference. First operand has 392 places, 613 transitions, 11203 flow. Second operand 10 states and 210 transitions. [2024-06-27 23:43:29,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 653 transitions, 13168 flow [2024-06-27 23:43:32,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 653 transitions, 12400 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-27 23:43:32,279 INFO L231 Difference]: Finished difference. Result has 395 places, 613 transitions, 11052 flow [2024-06-27 23:43:32,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10435, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=303, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11052, PETRI_PLACES=395, PETRI_TRANSITIONS=613} [2024-06-27 23:43:32,279 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-27 23:43:32,279 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 613 transitions, 11052 flow [2024-06-27 23:43:32,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:32,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:32,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:32,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 23:43:32,281 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:32,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:32,281 INFO L85 PathProgramCache]: Analyzing trace with hash 971797607, now seen corresponding path program 15 times [2024-06-27 23:43:32,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:32,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611909388] [2024-06-27 23:43:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:32,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:34,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:34,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611909388] [2024-06-27 23:43:34,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611909388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:34,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:34,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:43:34,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469971830] [2024-06-27 23:43:34,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:34,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:43:34,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:34,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:43:34,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:43:34,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:43:34,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 613 transitions, 11052 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:34,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:34,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:43:34,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:36,859 INFO L124 PetriNetUnfolderBase]: 3636/5737 cut-off events. [2024-06-27 23:43:36,860 INFO L125 PetriNetUnfolderBase]: For 1343983/1343983 co-relation queries the response was YES. [2024-06-27 23:43:36,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65158 conditions, 5737 events. 3636/5737 cut-off events. For 1343983/1343983 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 33612 event pairs, 672 based on Foata normal form. 3/5727 useless extension candidates. Maximal degree in co-relation 64942. Up to 4304 conditions per place. [2024-06-27 23:43:36,952 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 361 selfloop transitions, 291 changer transitions 0/660 dead transitions. [2024-06-27 23:43:36,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 660 transitions, 13163 flow [2024-06-27 23:43:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:43:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:43:36,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-27 23:43:36,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47107438016528924 [2024-06-27 23:43:36,954 INFO L175 Difference]: Start difference. First operand has 395 places, 613 transitions, 11052 flow. Second operand 11 states and 228 transitions. [2024-06-27 23:43:36,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 660 transitions, 13163 flow [2024-06-27 23:43:39,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 660 transitions, 12576 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 23:43:39,930 INFO L231 Difference]: Finished difference. Result has 401 places, 616 transitions, 11136 flow [2024-06-27 23:43:39,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10465, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11136, PETRI_PLACES=401, PETRI_TRANSITIONS=616} [2024-06-27 23:43:39,931 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-27 23:43:39,931 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 616 transitions, 11136 flow [2024-06-27 23:43:39,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:39,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:39,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:39,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 23:43:39,932 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)] === [2024-06-27 23:43:39,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:39,939 INFO L85 PathProgramCache]: Analyzing trace with hash 173303198, now seen corresponding path program 3 times [2024-06-27 23:43:39,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:39,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253563929] [2024-06-27 23:43:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:39,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:41,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:41,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253563929] [2024-06-27 23:43:41,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253563929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:41,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:41,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:43:41,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467683545] [2024-06-27 23:43:41,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:41,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:43:41,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:41,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:43:41,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:43:41,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:43:41,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 616 transitions, 11136 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:41,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:41,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:43:41,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:43,001 INFO L124 PetriNetUnfolderBase]: 3471/5580 cut-off events. [2024-06-27 23:43:43,001 INFO L125 PetriNetUnfolderBase]: For 1396302/1396305 co-relation queries the response was YES. [2024-06-27 23:43:43,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64313 conditions, 5580 events. 3471/5580 cut-off events. For 1396302/1396305 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 33568 event pairs, 701 based on Foata normal form. 4/5561 useless extension candidates. Maximal degree in co-relation 64093. Up to 4629 conditions per place. [2024-06-27 23:43:43,098 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 483 selfloop transitions, 107 changer transitions 0/640 dead transitions. [2024-06-27 23:43:43,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 640 transitions, 13076 flow [2024-06-27 23:43:43,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:43:43,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:43:43,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-27 23:43:43,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-27 23:43:43,100 INFO L175 Difference]: Start difference. First operand has 401 places, 616 transitions, 11136 flow. Second operand 7 states and 148 transitions. [2024-06-27 23:43:43,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 640 transitions, 13076 flow [2024-06-27 23:43:45,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 640 transitions, 12270 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-27 23:43:46,001 INFO L231 Difference]: Finished difference. Result has 400 places, 626 transitions, 10835 flow [2024-06-27 23:43:46,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10330, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10835, PETRI_PLACES=400, PETRI_TRANSITIONS=626} [2024-06-27 23:43:46,005 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 355 predicate places. [2024-06-27 23:43:46,005 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 626 transitions, 10835 flow [2024-06-27 23:43:46,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:46,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:46,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:46,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 23:43:46,006 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)] === [2024-06-27 23:43:46,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash 173303632, now seen corresponding path program 2 times [2024-06-27 23:43:46,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:46,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984820953] [2024-06-27 23:43:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:46,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:47,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:47,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984820953] [2024-06-27 23:43:47,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984820953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:47,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:47,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:43:47,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645987582] [2024-06-27 23:43:47,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:47,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:43:47,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:47,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:43:47,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:43:47,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:43:47,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 626 transitions, 10835 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:47,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:47,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:43:47,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:48,953 INFO L124 PetriNetUnfolderBase]: 3415/5473 cut-off events. [2024-06-27 23:43:48,954 INFO L125 PetriNetUnfolderBase]: For 1470044/1470201 co-relation queries the response was YES. [2024-06-27 23:43:49,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63769 conditions, 5473 events. 3415/5473 cut-off events. For 1470044/1470201 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32877 event pairs, 694 based on Foata normal form. 95/5490 useless extension candidates. Maximal degree in co-relation 63547. Up to 4752 conditions per place. [2024-06-27 23:43:49,045 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 518 selfloop transitions, 58 changer transitions 0/646 dead transitions. [2024-06-27 23:43:49,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 646 transitions, 12615 flow [2024-06-27 23:43:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:43:49,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:43:49,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 23:43:49,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-27 23:43:49,046 INFO L175 Difference]: Start difference. First operand has 400 places, 626 transitions, 10835 flow. Second operand 7 states and 142 transitions. [2024-06-27 23:43:49,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 646 transitions, 12615 flow [2024-06-27 23:43:52,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 646 transitions, 12389 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-06-27 23:43:52,588 INFO L231 Difference]: Finished difference. Result has 405 places, 635 transitions, 10917 flow [2024-06-27 23:43:52,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10615, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10917, PETRI_PLACES=405, PETRI_TRANSITIONS=635} [2024-06-27 23:43:52,589 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 360 predicate places. [2024-06-27 23:43:52,589 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 635 transitions, 10917 flow [2024-06-27 23:43:52,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:52,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:52,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:52,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 23:43:52,590 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)] === [2024-06-27 23:43:52,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:52,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1893906506, now seen corresponding path program 3 times [2024-06-27 23:43:52,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:52,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708167531] [2024-06-27 23:43:52,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:52,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:43:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:43:53,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:43:53,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708167531] [2024-06-27 23:43:53,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708167531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:43:53,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:43:53,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:43:53,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554478462] [2024-06-27 23:43:53,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:43:53,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:43:53,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:43:53,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:43:53,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:43:54,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:43:54,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 635 transitions, 10917 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:54,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:43:54,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:43:54,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:43:55,576 INFO L124 PetriNetUnfolderBase]: 3408/5467 cut-off events. [2024-06-27 23:43:55,577 INFO L125 PetriNetUnfolderBase]: For 1482223/1482380 co-relation queries the response was YES. [2024-06-27 23:43:55,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63721 conditions, 5467 events. 3408/5467 cut-off events. For 1482223/1482380 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32897 event pairs, 694 based on Foata normal form. 95/5484 useless extension candidates. Maximal degree in co-relation 63497. Up to 4746 conditions per place. [2024-06-27 23:43:55,669 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 514 selfloop transitions, 61 changer transitions 0/645 dead transitions. [2024-06-27 23:43:55,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 645 transitions, 12313 flow [2024-06-27 23:43:55,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:43:55,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:43:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 23:43:55,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 23:43:55,670 INFO L175 Difference]: Start difference. First operand has 405 places, 635 transitions, 10917 flow. Second operand 7 states and 140 transitions. [2024-06-27 23:43:55,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 645 transitions, 12313 flow [2024-06-27 23:43:59,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 645 transitions, 12176 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-27 23:43:59,028 INFO L231 Difference]: Finished difference. Result has 410 places, 635 transitions, 10908 flow [2024-06-27 23:43:59,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10780, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10908, PETRI_PLACES=410, PETRI_TRANSITIONS=635} [2024-06-27 23:43:59,028 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 365 predicate places. [2024-06-27 23:43:59,028 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 635 transitions, 10908 flow [2024-06-27 23:43:59,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:43:59,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:43:59,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:43:59,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 23:43:59,029 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:43:59,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:43:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash -880378931, now seen corresponding path program 11 times [2024-06-27 23:43:59,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:43:59,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836041734] [2024-06-27 23:43:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:43:59,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:43:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:00,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:00,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836041734] [2024-06-27 23:44:00,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836041734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:00,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:00,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:44:00,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423164074] [2024-06-27 23:44:00,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:00,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:44:00,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:00,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:44:00,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:44:00,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:44:00,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 635 transitions, 10908 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:00,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:00,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:44:00,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:02,899 INFO L124 PetriNetUnfolderBase]: 3738/5894 cut-off events. [2024-06-27 23:44:02,899 INFO L125 PetriNetUnfolderBase]: For 1496626/1496628 co-relation queries the response was YES. [2024-06-27 23:44:02,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68018 conditions, 5894 events. 3738/5894 cut-off events. For 1496626/1496628 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34722 event pairs, 676 based on Foata normal form. 6/5897 useless extension candidates. Maximal degree in co-relation 67792. Up to 5229 conditions per place. [2024-06-27 23:44:03,009 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 593 selfloop transitions, 75 changer transitions 0/679 dead transitions. [2024-06-27 23:44:03,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 679 transitions, 12990 flow [2024-06-27 23:44:03,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:44:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:44:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-27 23:44:03,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-27 23:44:03,016 INFO L175 Difference]: Start difference. First operand has 410 places, 635 transitions, 10908 flow. Second operand 10 states and 203 transitions. [2024-06-27 23:44:03,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 679 transitions, 12990 flow [2024-06-27 23:44:07,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 679 transitions, 12873 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 23:44:07,146 INFO L231 Difference]: Finished difference. Result has 417 places, 643 transitions, 11192 flow [2024-06-27 23:44:07,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10791, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11192, PETRI_PLACES=417, PETRI_TRANSITIONS=643} [2024-06-27 23:44:07,147 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 372 predicate places. [2024-06-27 23:44:07,147 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 643 transitions, 11192 flow [2024-06-27 23:44:07,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:07,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:07,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:07,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 23:44:07,147 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:44:07,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:07,148 INFO L85 PathProgramCache]: Analyzing trace with hash 975741431, now seen corresponding path program 12 times [2024-06-27 23:44:07,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:07,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893926173] [2024-06-27 23:44:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:07,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:08,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:08,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893926173] [2024-06-27 23:44:08,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893926173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:08,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:08,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:44:08,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274999486] [2024-06-27 23:44:08,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:08,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:44:08,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:08,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:44:08,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:44:08,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:44:08,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 643 transitions, 11192 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:08,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:08,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:44:08,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:10,750 INFO L124 PetriNetUnfolderBase]: 3840/6052 cut-off events. [2024-06-27 23:44:10,750 INFO L125 PetriNetUnfolderBase]: For 1565586/1565588 co-relation queries the response was YES. [2024-06-27 23:44:10,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70902 conditions, 6052 events. 3840/6052 cut-off events. For 1565586/1565588 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35915 event pairs, 684 based on Foata normal form. 6/6055 useless extension candidates. Maximal degree in co-relation 70673. Up to 5163 conditions per place. [2024-06-27 23:44:10,852 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 576 selfloop transitions, 125 changer transitions 0/712 dead transitions. [2024-06-27 23:44:10,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 712 transitions, 13680 flow [2024-06-27 23:44:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 23:44:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 23:44:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 280 transitions. [2024-06-27 23:44:10,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 23:44:10,854 INFO L175 Difference]: Start difference. First operand has 417 places, 643 transitions, 11192 flow. Second operand 14 states and 280 transitions. [2024-06-27 23:44:10,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 712 transitions, 13680 flow [2024-06-27 23:44:15,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 712 transitions, 13399 flow, removed 104 selfloop flow, removed 7 redundant places. [2024-06-27 23:44:15,662 INFO L231 Difference]: Finished difference. Result has 425 places, 657 transitions, 11658 flow [2024-06-27 23:44:15,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11015, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11658, PETRI_PLACES=425, PETRI_TRANSITIONS=657} [2024-06-27 23:44:15,663 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-27 23:44:15,663 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 657 transitions, 11658 flow [2024-06-27 23:44:15,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:15,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:15,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:15,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 23:44:15,664 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:44:15,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:15,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1064455061, now seen corresponding path program 13 times [2024-06-27 23:44:15,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:15,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079386001] [2024-06-27 23:44:15,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:15,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:17,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:17,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079386001] [2024-06-27 23:44:17,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079386001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:17,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:17,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:44:17,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426745327] [2024-06-27 23:44:17,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:17,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:44:17,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:17,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:44:17,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:44:17,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:44:17,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 657 transitions, 11658 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:17,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:17,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:44:17,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:19,544 INFO L124 PetriNetUnfolderBase]: 3879/6133 cut-off events. [2024-06-27 23:44:19,544 INFO L125 PetriNetUnfolderBase]: For 1608488/1608490 co-relation queries the response was YES. [2024-06-27 23:44:19,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72125 conditions, 6133 events. 3879/6133 cut-off events. For 1608488/1608490 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 36698 event pairs, 776 based on Foata normal form. 8/6138 useless extension candidates. Maximal degree in co-relation 71894. Up to 5478 conditions per place. [2024-06-27 23:44:19,647 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 599 selfloop transitions, 105 changer transitions 0/715 dead transitions. [2024-06-27 23:44:19,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 715 transitions, 13558 flow [2024-06-27 23:44:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-27 23:44:19,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-27 23:44:19,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 290 transitions. [2024-06-27 23:44:19,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-27 23:44:19,649 INFO L175 Difference]: Start difference. First operand has 425 places, 657 transitions, 11658 flow. Second operand 15 states and 290 transitions. [2024-06-27 23:44:19,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 715 transitions, 13558 flow [2024-06-27 23:44:23,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 715 transitions, 13339 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-06-27 23:44:23,573 INFO L231 Difference]: Finished difference. Result has 432 places, 663 transitions, 11884 flow [2024-06-27 23:44:23,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11457, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11884, PETRI_PLACES=432, PETRI_TRANSITIONS=663} [2024-06-27 23:44:23,574 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 387 predicate places. [2024-06-27 23:44:23,574 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 663 transitions, 11884 flow [2024-06-27 23:44:23,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:23,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:23,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:23,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 23:44:23,575 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:44:23,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:23,576 INFO L85 PathProgramCache]: Analyzing trace with hash -258092557, now seen corresponding path program 14 times [2024-06-27 23:44:23,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:23,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756702927] [2024-06-27 23:44:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:23,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:25,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:25,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756702927] [2024-06-27 23:44:25,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756702927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:25,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:25,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:44:25,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644774915] [2024-06-27 23:44:25,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:25,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:44:25,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:25,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:44:25,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:44:25,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:44:25,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 663 transitions, 11884 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:25,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:25,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:44:25,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:27,552 INFO L124 PetriNetUnfolderBase]: 3893/6149 cut-off events. [2024-06-27 23:44:27,552 INFO L125 PetriNetUnfolderBase]: For 1604311/1604313 co-relation queries the response was YES. [2024-06-27 23:44:27,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72000 conditions, 6149 events. 3893/6149 cut-off events. For 1604311/1604313 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 36702 event pairs, 753 based on Foata normal form. 6/6152 useless extension candidates. Maximal degree in co-relation 71767. Up to 5413 conditions per place. [2024-06-27 23:44:27,644 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 593 selfloop transitions, 112 changer transitions 0/716 dead transitions. [2024-06-27 23:44:27,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 716 transitions, 13588 flow [2024-06-27 23:44:27,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 23:44:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 23:44:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 275 transitions. [2024-06-27 23:44:27,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 23:44:27,645 INFO L175 Difference]: Start difference. First operand has 432 places, 663 transitions, 11884 flow. Second operand 14 states and 275 transitions. [2024-06-27 23:44:27,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 716 transitions, 13588 flow [2024-06-27 23:44:31,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 716 transitions, 13251 flow, removed 68 selfloop flow, removed 13 redundant places. [2024-06-27 23:44:31,330 INFO L231 Difference]: Finished difference. Result has 433 places, 667 transitions, 11830 flow [2024-06-27 23:44:31,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11547, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11830, PETRI_PLACES=433, PETRI_TRANSITIONS=667} [2024-06-27 23:44:31,330 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 388 predicate places. [2024-06-27 23:44:31,331 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 667 transitions, 11830 flow [2024-06-27 23:44:31,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:31,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:31,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:31,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 23:44:31,331 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:44:31,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1142308211, now seen corresponding path program 15 times [2024-06-27 23:44:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:31,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431870135] [2024-06-27 23:44:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:31,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:32,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:32,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431870135] [2024-06-27 23:44:32,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431870135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:32,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:32,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:44:32,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109893408] [2024-06-27 23:44:32,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:32,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:44:32,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:32,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:44:32,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:44:32,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 23:44:32,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 667 transitions, 11830 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:32,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:32,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 23:44:32,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:34,985 INFO L124 PetriNetUnfolderBase]: 3507/5820 cut-off events. [2024-06-27 23:44:34,985 INFO L125 PetriNetUnfolderBase]: For 1467807/1467860 co-relation queries the response was YES. [2024-06-27 23:44:35,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65908 conditions, 5820 events. 3507/5820 cut-off events. For 1467807/1467860 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36765 event pairs, 386 based on Foata normal form. 53/5853 useless extension candidates. Maximal degree in co-relation 65674. Up to 3751 conditions per place. [2024-06-27 23:44:35,086 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 396 selfloop transitions, 184 changer transitions 0/740 dead transitions. [2024-06-27 23:44:35,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 740 transitions, 14336 flow [2024-06-27 23:44:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-27 23:44:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-27 23:44:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 311 transitions. [2024-06-27 23:44:35,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048701298701299 [2024-06-27 23:44:35,104 INFO L175 Difference]: Start difference. First operand has 433 places, 667 transitions, 11830 flow. Second operand 14 states and 311 transitions. [2024-06-27 23:44:35,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 740 transitions, 14336 flow [2024-06-27 23:44:39,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 740 transitions, 14041 flow, removed 36 selfloop flow, removed 13 redundant places. [2024-06-27 23:44:39,819 INFO L231 Difference]: Finished difference. Result has 435 places, 686 transitions, 12480 flow [2024-06-27 23:44:39,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11535, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12480, PETRI_PLACES=435, PETRI_TRANSITIONS=686} [2024-06-27 23:44:39,820 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 390 predicate places. [2024-06-27 23:44:39,820 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 686 transitions, 12480 flow [2024-06-27 23:44:39,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:39,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:39,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:39,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 23:44:39,821 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:44:39,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:39,821 INFO L85 PathProgramCache]: Analyzing trace with hash -253325935, now seen corresponding path program 16 times [2024-06-27 23:44:39,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:39,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303383549] [2024-06-27 23:44:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:39,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:41,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:41,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303383549] [2024-06-27 23:44:41,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303383549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:41,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:41,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:44:41,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596148937] [2024-06-27 23:44:41,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:41,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:44:41,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:41,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:44:41,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:44:41,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:44:41,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 686 transitions, 12480 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:41,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:41,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:44:41,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:44,614 INFO L124 PetriNetUnfolderBase]: 4073/6457 cut-off events. [2024-06-27 23:44:44,614 INFO L125 PetriNetUnfolderBase]: For 1728230/1728232 co-relation queries the response was YES. [2024-06-27 23:44:44,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76807 conditions, 6457 events. 4073/6457 cut-off events. For 1728230/1728232 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 39247 event pairs, 826 based on Foata normal form. 4/6458 useless extension candidates. Maximal degree in co-relation 76571. Up to 5679 conditions per place. [2024-06-27 23:44:44,733 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 611 selfloop transitions, 146 changer transitions 0/768 dead transitions. [2024-06-27 23:44:44,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 768 transitions, 15360 flow [2024-06-27 23:44:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-06-27 23:44:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-06-27 23:44:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 351 transitions. [2024-06-27 23:44:44,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 23:44:44,735 INFO L175 Difference]: Start difference. First operand has 435 places, 686 transitions, 12480 flow. Second operand 18 states and 351 transitions. [2024-06-27 23:44:44,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 768 transitions, 15360 flow [2024-06-27 23:44:49,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 768 transitions, 15108 flow, removed 62 selfloop flow, removed 10 redundant places. [2024-06-27 23:44:49,465 INFO L231 Difference]: Finished difference. Result has 444 places, 702 transitions, 12953 flow [2024-06-27 23:44:49,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12234, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12953, PETRI_PLACES=444, PETRI_TRANSITIONS=702} [2024-06-27 23:44:49,466 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 399 predicate places. [2024-06-27 23:44:49,466 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 702 transitions, 12953 flow [2024-06-27 23:44:49,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:49,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:49,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:49,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 23:44:49,467 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)] === [2024-06-27 23:44:49,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:49,468 INFO L85 PathProgramCache]: Analyzing trace with hash 481903330, now seen corresponding path program 4 times [2024-06-27 23:44:49,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:49,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921014554] [2024-06-27 23:44:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:49,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:50,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:50,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921014554] [2024-06-27 23:44:50,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921014554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:50,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:50,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:44:50,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525053015] [2024-06-27 23:44:50,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:50,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:44:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:50,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:44:50,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:44:50,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:44:50,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 702 transitions, 12953 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:50,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:50,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:44:50,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:44:52,575 INFO L124 PetriNetUnfolderBase]: 3897/6290 cut-off events. [2024-06-27 23:44:52,575 INFO L125 PetriNetUnfolderBase]: For 1716471/1716476 co-relation queries the response was YES. [2024-06-27 23:44:52,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74720 conditions, 6290 events. 3897/6290 cut-off events. For 1716471/1716476 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 39187 event pairs, 750 based on Foata normal form. 7/6285 useless extension candidates. Maximal degree in co-relation 74482. Up to 5220 conditions per place. [2024-06-27 23:44:52,674 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 552 selfloop transitions, 134 changer transitions 0/764 dead transitions. [2024-06-27 23:44:52,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 764 transitions, 15088 flow [2024-06-27 23:44:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:44:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:44:52,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 23:44:52,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-27 23:44:52,676 INFO L175 Difference]: Start difference. First operand has 444 places, 702 transitions, 12953 flow. Second operand 9 states and 195 transitions. [2024-06-27 23:44:52,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 764 transitions, 15088 flow [2024-06-27 23:44:57,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 764 transitions, 14888 flow, removed 36 selfloop flow, removed 13 redundant places. [2024-06-27 23:44:57,261 INFO L231 Difference]: Finished difference. Result has 442 places, 735 transitions, 13780 flow [2024-06-27 23:44:57,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12761, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13780, PETRI_PLACES=442, PETRI_TRANSITIONS=735} [2024-06-27 23:44:57,261 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 397 predicate places. [2024-06-27 23:44:57,261 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 735 transitions, 13780 flow [2024-06-27 23:44:57,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:57,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:44:57,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:44:57,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 23:44:57,262 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:44:57,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:44:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1403062969, now seen corresponding path program 16 times [2024-06-27 23:44:57,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:44:57,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707492095] [2024-06-27 23:44:57,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:44:57,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:44:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:44:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:44:58,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:44:58,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707492095] [2024-06-27 23:44:58,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707492095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:44:58,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:44:58,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:44:58,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012913723] [2024-06-27 23:44:58,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:44:58,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:44:58,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:44:58,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:44:58,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:44:59,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:44:59,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 735 transitions, 13780 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:44:59,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:44:59,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:44:59,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:01,304 INFO L124 PetriNetUnfolderBase]: 4113/6506 cut-off events. [2024-06-27 23:45:01,304 INFO L125 PetriNetUnfolderBase]: For 1740183/1740185 co-relation queries the response was YES. [2024-06-27 23:45:01,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77138 conditions, 6506 events. 4113/6506 cut-off events. For 1740183/1740185 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 39448 event pairs, 757 based on Foata normal form. 10/6513 useless extension candidates. Maximal degree in co-relation 76896. Up to 5892 conditions per place. [2024-06-27 23:45:01,423 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 684 selfloop transitions, 71 changer transitions 0/766 dead transitions. [2024-06-27 23:45:01,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 766 transitions, 15439 flow [2024-06-27 23:45:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:45:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:45:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 23:45:01,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-27 23:45:01,425 INFO L175 Difference]: Start difference. First operand has 442 places, 735 transitions, 13780 flow. Second operand 10 states and 199 transitions. [2024-06-27 23:45:01,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 766 transitions, 15439 flow [2024-06-27 23:45:05,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 766 transitions, 14994 flow, removed 150 selfloop flow, removed 4 redundant places. [2024-06-27 23:45:05,256 INFO L231 Difference]: Finished difference. Result has 448 places, 735 transitions, 13495 flow [2024-06-27 23:45:05,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13335, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13495, PETRI_PLACES=448, PETRI_TRANSITIONS=735} [2024-06-27 23:45:05,261 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 403 predicate places. [2024-06-27 23:45:05,262 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 735 transitions, 13495 flow [2024-06-27 23:45:05,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:05,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:05,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:05,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 23:45:05,262 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:45:05,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:05,262 INFO L85 PathProgramCache]: Analyzing trace with hash -671884723, now seen corresponding path program 17 times [2024-06-27 23:45:05,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:05,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913664605] [2024-06-27 23:45:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:05,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:06,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:06,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913664605] [2024-06-27 23:45:06,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913664605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:06,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:06,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:45:06,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773462107] [2024-06-27 23:45:06,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:06,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:45:06,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:06,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:45:06,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:45:07,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:45:07,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 735 transitions, 13495 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:07,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:07,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:45:07,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:09,197 INFO L124 PetriNetUnfolderBase]: 4133/6532 cut-off events. [2024-06-27 23:45:09,198 INFO L125 PetriNetUnfolderBase]: For 1719558/1719560 co-relation queries the response was YES. [2024-06-27 23:45:09,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76179 conditions, 6532 events. 4133/6532 cut-off events. For 1719558/1719560 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 39549 event pairs, 707 based on Foata normal form. 8/6537 useless extension candidates. Maximal degree in co-relation 75936. Up to 5601 conditions per place. [2024-06-27 23:45:09,321 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 661 selfloop transitions, 110 changer transitions 0/782 dead transitions. [2024-06-27 23:45:09,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 782 transitions, 15340 flow [2024-06-27 23:45:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:45:09,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:45:09,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-27 23:45:09,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-27 23:45:09,323 INFO L175 Difference]: Start difference. First operand has 448 places, 735 transitions, 13495 flow. Second operand 11 states and 221 transitions. [2024-06-27 23:45:09,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 782 transitions, 15340 flow [2024-06-27 23:45:12,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 782 transitions, 15041 flow, removed 73 selfloop flow, removed 9 redundant places. [2024-06-27 23:45:12,847 INFO L231 Difference]: Finished difference. Result has 450 places, 741 transitions, 13527 flow [2024-06-27 23:45:12,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13200, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13527, PETRI_PLACES=450, PETRI_TRANSITIONS=741} [2024-06-27 23:45:12,847 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 405 predicate places. [2024-06-27 23:45:12,847 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 741 transitions, 13527 flow [2024-06-27 23:45:12,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:12,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:12,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:12,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 23:45:12,848 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:45:12,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:12,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1389016469, now seen corresponding path program 18 times [2024-06-27 23:45:12,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:12,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590257760] [2024-06-27 23:45:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:12,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:14,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:14,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590257760] [2024-06-27 23:45:14,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590257760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:14,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:14,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:45:14,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652295829] [2024-06-27 23:45:14,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:14,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:45:14,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:14,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:45:14,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:45:14,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:45:14,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 741 transitions, 13527 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:14,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:14,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:45:14,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:16,975 INFO L124 PetriNetUnfolderBase]: 4161/6571 cut-off events. [2024-06-27 23:45:16,976 INFO L125 PetriNetUnfolderBase]: For 1734778/1734781 co-relation queries the response was YES. [2024-06-27 23:45:17,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76793 conditions, 6571 events. 4161/6571 cut-off events. For 1734778/1734781 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 39809 event pairs, 755 based on Foata normal form. 4/6571 useless extension candidates. Maximal degree in co-relation 76549. Up to 5677 conditions per place. [2024-06-27 23:45:17,079 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 591 selfloop transitions, 176 changer transitions 0/778 dead transitions. [2024-06-27 23:45:17,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 778 transitions, 15413 flow [2024-06-27 23:45:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:45:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:45:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-27 23:45:17,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-27 23:45:17,081 INFO L175 Difference]: Start difference. First operand has 450 places, 741 transitions, 13527 flow. Second operand 10 states and 207 transitions. [2024-06-27 23:45:17,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 778 transitions, 15413 flow [2024-06-27 23:45:20,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 778 transitions, 15086 flow, removed 52 selfloop flow, removed 11 redundant places. [2024-06-27 23:45:20,570 INFO L231 Difference]: Finished difference. Result has 449 places, 745 transitions, 13680 flow [2024-06-27 23:45:20,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13200, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13680, PETRI_PLACES=449, PETRI_TRANSITIONS=745} [2024-06-27 23:45:20,571 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-27 23:45:20,571 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 745 transitions, 13680 flow [2024-06-27 23:45:20,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:20,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:20,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:20,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 23:45:20,572 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:45:20,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1389164339, now seen corresponding path program 19 times [2024-06-27 23:45:20,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:20,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116428174] [2024-06-27 23:45:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:20,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:22,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:22,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116428174] [2024-06-27 23:45:22,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116428174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:22,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:22,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:45:22,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183129234] [2024-06-27 23:45:22,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:22,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:45:22,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:22,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:45:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:45:22,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:45:22,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 745 transitions, 13680 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:22,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:22,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:45:22,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:24,660 INFO L124 PetriNetUnfolderBase]: 4211/6649 cut-off events. [2024-06-27 23:45:24,660 INFO L125 PetriNetUnfolderBase]: For 1681171/1681174 co-relation queries the response was YES. [2024-06-27 23:45:24,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76812 conditions, 6649 events. 4211/6649 cut-off events. For 1681171/1681174 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 40274 event pairs, 745 based on Foata normal form. 4/6649 useless extension candidates. Maximal degree in co-relation 76569. Up to 5654 conditions per place. [2024-06-27 23:45:24,783 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 595 selfloop transitions, 185 changer transitions 0/791 dead transitions. [2024-06-27 23:45:24,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 791 transitions, 16114 flow [2024-06-27 23:45:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:45:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:45:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 23:45:24,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:45:24,785 INFO L175 Difference]: Start difference. First operand has 449 places, 745 transitions, 13680 flow. Second operand 10 states and 210 transitions. [2024-06-27 23:45:24,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 791 transitions, 16114 flow [2024-06-27 23:45:28,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 791 transitions, 15739 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 23:45:28,291 INFO L231 Difference]: Finished difference. Result has 453 places, 755 transitions, 13958 flow [2024-06-27 23:45:28,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13305, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13958, PETRI_PLACES=453, PETRI_TRANSITIONS=755} [2024-06-27 23:45:28,291 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 408 predicate places. [2024-06-27 23:45:28,291 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 755 transitions, 13958 flow [2024-06-27 23:45:28,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:28,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:28,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:28,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 23:45:28,292 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:45:28,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:28,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1383654089, now seen corresponding path program 20 times [2024-06-27 23:45:28,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:28,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834890275] [2024-06-27 23:45:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:28,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:30,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:30,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834890275] [2024-06-27 23:45:30,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834890275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:30,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:30,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 23:45:30,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563812747] [2024-06-27 23:45:30,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:30,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 23:45:30,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:30,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 23:45:30,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 23:45:30,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:45:30,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 755 transitions, 13958 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:30,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:30,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:45:30,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:32,292 INFO L124 PetriNetUnfolderBase]: 4203/6639 cut-off events. [2024-06-27 23:45:32,293 INFO L125 PetriNetUnfolderBase]: For 1692377/1692380 co-relation queries the response was YES. [2024-06-27 23:45:32,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76633 conditions, 6639 events. 4203/6639 cut-off events. For 1692377/1692380 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 40264 event pairs, 751 based on Foata normal form. 4/6639 useless extension candidates. Maximal degree in co-relation 76388. Up to 5743 conditions per place. [2024-06-27 23:45:32,414 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 593 selfloop transitions, 183 changer transitions 0/787 dead transitions. [2024-06-27 23:45:32,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 787 transitions, 15724 flow [2024-06-27 23:45:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 23:45:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 23:45:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 23:45:32,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-27 23:45:32,416 INFO L175 Difference]: Start difference. First operand has 453 places, 755 transitions, 13958 flow. Second operand 10 states and 206 transitions. [2024-06-27 23:45:32,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 787 transitions, 15724 flow [2024-06-27 23:45:37,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 787 transitions, 15316 flow, removed 92 selfloop flow, removed 8 redundant places. [2024-06-27 23:45:37,197 INFO L231 Difference]: Finished difference. Result has 455 places, 755 transitions, 13926 flow [2024-06-27 23:45:37,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13550, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13926, PETRI_PLACES=455, PETRI_TRANSITIONS=755} [2024-06-27 23:45:37,202 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-27 23:45:37,202 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 755 transitions, 13926 flow [2024-06-27 23:45:37,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:37,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:37,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:37,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 23:45:37,203 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:45:37,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1560244197, now seen corresponding path program 17 times [2024-06-27 23:45:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:37,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097471955] [2024-06-27 23:45:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:37,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:39,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:39,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097471955] [2024-06-27 23:45:39,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097471955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:39,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:39,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:45:39,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169067275] [2024-06-27 23:45:39,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:39,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:45:39,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:39,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:45:39,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:45:39,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:45:39,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 755 transitions, 13926 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:39,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:39,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:45:39,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:41,728 INFO L124 PetriNetUnfolderBase]: 4209/6666 cut-off events. [2024-06-27 23:45:41,728 INFO L125 PetriNetUnfolderBase]: For 1695698/1695700 co-relation queries the response was YES. [2024-06-27 23:45:41,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76552 conditions, 6666 events. 4209/6666 cut-off events. For 1695698/1695700 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 40749 event pairs, 781 based on Foata normal form. 5/6668 useless extension candidates. Maximal degree in co-relation 76306. Up to 6050 conditions per place. [2024-06-27 23:45:41,868 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 698 selfloop transitions, 85 changer transitions 0/794 dead transitions. [2024-06-27 23:45:41,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 794 transitions, 15752 flow [2024-06-27 23:45:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:45:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:45:41,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 23:45:41,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-27 23:45:41,870 INFO L175 Difference]: Start difference. First operand has 455 places, 755 transitions, 13926 flow. Second operand 11 states and 217 transitions. [2024-06-27 23:45:41,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 794 transitions, 15752 flow [2024-06-27 23:45:46,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 794 transitions, 15326 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-27 23:45:46,462 INFO L231 Difference]: Finished difference. Result has 459 places, 761 transitions, 13805 flow [2024-06-27 23:45:46,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13500, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13805, PETRI_PLACES=459, PETRI_TRANSITIONS=761} [2024-06-27 23:45:46,463 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 414 predicate places. [2024-06-27 23:45:46,463 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 761 transitions, 13805 flow [2024-06-27 23:45:46,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:46,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:46,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:46,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 23:45:46,464 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:45:46,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:46,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1383438887, now seen corresponding path program 18 times [2024-06-27 23:45:46,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:46,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079166291] [2024-06-27 23:45:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:46,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:48,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:48,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079166291] [2024-06-27 23:45:48,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079166291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:48,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:48,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:45:48,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695005080] [2024-06-27 23:45:48,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:48,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:45:48,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:48,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:45:48,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:45:48,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:45:48,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 761 transitions, 13805 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:48,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:48,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:45:48,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:45:51,430 INFO L124 PetriNetUnfolderBase]: 4346/6881 cut-off events. [2024-06-27 23:45:51,430 INFO L125 PetriNetUnfolderBase]: For 1722397/1722400 co-relation queries the response was YES. [2024-06-27 23:45:51,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77543 conditions, 6881 events. 4346/6881 cut-off events. For 1722397/1722400 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 42403 event pairs, 763 based on Foata normal form. 2/6879 useless extension candidates. Maximal degree in co-relation 77296. Up to 5292 conditions per place. [2024-06-27 23:45:51,540 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 437 selfloop transitions, 409 changer transitions 0/857 dead transitions. [2024-06-27 23:45:51,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 857 transitions, 17010 flow [2024-06-27 23:45:51,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:45:51,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:45:51,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-27 23:45:51,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834710743801653 [2024-06-27 23:45:51,542 INFO L175 Difference]: Start difference. First operand has 459 places, 761 transitions, 13805 flow. Second operand 11 states and 234 transitions. [2024-06-27 23:45:51,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 857 transitions, 17010 flow [2024-06-27 23:45:55,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 857 transitions, 16868 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 23:45:55,440 INFO L231 Difference]: Finished difference. Result has 464 places, 820 transitions, 15486 flow [2024-06-27 23:45:55,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13663, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15486, PETRI_PLACES=464, PETRI_TRANSITIONS=820} [2024-06-27 23:45:55,441 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 419 predicate places. [2024-06-27 23:45:55,441 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 820 transitions, 15486 flow [2024-06-27 23:45:55,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:55,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:45:55,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:45:55,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 23:45:55,442 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:45:55,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:45:55,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1140041393, now seen corresponding path program 19 times [2024-06-27 23:45:55,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:45:55,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008686920] [2024-06-27 23:45:55,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:45:55,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:45:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:45:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:45:57,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:45:57,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008686920] [2024-06-27 23:45:57,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008686920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:45:57,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:45:57,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:45:57,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781287249] [2024-06-27 23:45:57,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:45:57,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:45:57,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:45:57,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:45:57,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:45:57,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:45:57,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 820 transitions, 15486 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:45:57,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:45:57,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:45:57,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:00,028 INFO L124 PetriNetUnfolderBase]: 4367/6916 cut-off events. [2024-06-27 23:46:00,029 INFO L125 PetriNetUnfolderBase]: For 1766573/1766576 co-relation queries the response was YES. [2024-06-27 23:46:00,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79641 conditions, 6916 events. 4367/6916 cut-off events. For 1766573/1766576 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 42671 event pairs, 763 based on Foata normal form. 3/6915 useless extension candidates. Maximal degree in co-relation 79392. Up to 5312 conditions per place. [2024-06-27 23:46:00,171 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 464 selfloop transitions, 393 changer transitions 0/868 dead transitions. [2024-06-27 23:46:00,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 868 transitions, 18086 flow [2024-06-27 23:46:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:46:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:46:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-27 23:46:00,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-27 23:46:00,173 INFO L175 Difference]: Start difference. First operand has 464 places, 820 transitions, 15486 flow. Second operand 12 states and 253 transitions. [2024-06-27 23:46:00,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 868 transitions, 18086 flow [2024-06-27 23:46:04,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 868 transitions, 16625 flow, removed 35 selfloop flow, removed 10 redundant places. [2024-06-27 23:46:04,835 INFO L231 Difference]: Finished difference. Result has 467 places, 829 transitions, 15031 flow [2024-06-27 23:46:04,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14042, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15031, PETRI_PLACES=467, PETRI_TRANSITIONS=829} [2024-06-27 23:46:04,836 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 422 predicate places. [2024-06-27 23:46:04,836 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 829 transitions, 15031 flow [2024-06-27 23:46:04,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:04,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:04,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:04,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 23:46:04,837 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:46:04,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:04,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1145403773, now seen corresponding path program 20 times [2024-06-27 23:46:04,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:04,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929065236] [2024-06-27 23:46:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:04,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:07,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:07,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929065236] [2024-06-27 23:46:07,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929065236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:07,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:07,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:46:07,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080889080] [2024-06-27 23:46:07,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:07,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:46:07,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:07,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:46:07,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:46:07,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:46:07,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 829 transitions, 15031 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:07,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:07,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:46:07,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:09,924 INFO L124 PetriNetUnfolderBase]: 4388/6951 cut-off events. [2024-06-27 23:46:09,924 INFO L125 PetriNetUnfolderBase]: For 1812722/1812725 co-relation queries the response was YES. [2024-06-27 23:46:10,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80112 conditions, 6951 events. 4388/6951 cut-off events. For 1812722/1812725 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 42936 event pairs, 763 based on Foata normal form. 3/6950 useless extension candidates. Maximal degree in co-relation 79861. Up to 5338 conditions per place. [2024-06-27 23:46:10,048 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 462 selfloop transitions, 403 changer transitions 0/876 dead transitions. [2024-06-27 23:46:10,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 876 transitions, 17618 flow [2024-06-27 23:46:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:46:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:46:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-27 23:46:10,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 23:46:10,050 INFO L175 Difference]: Start difference. First operand has 467 places, 829 transitions, 15031 flow. Second operand 12 states and 252 transitions. [2024-06-27 23:46:10,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 876 transitions, 17618 flow [2024-06-27 23:46:15,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 876 transitions, 16607 flow, removed 77 selfloop flow, removed 10 redundant places. [2024-06-27 23:46:15,061 INFO L231 Difference]: Finished difference. Result has 470 places, 838 transitions, 15041 flow [2024-06-27 23:46:15,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14039, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15041, PETRI_PLACES=470, PETRI_TRANSITIONS=838} [2024-06-27 23:46:15,062 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 425 predicate places. [2024-06-27 23:46:15,062 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 838 transitions, 15041 flow [2024-06-27 23:46:15,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:15,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:15,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:15,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 23:46:15,063 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:46:15,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:15,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1383446327, now seen corresponding path program 21 times [2024-06-27 23:46:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:15,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922617160] [2024-06-27 23:46:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:15,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:17,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:17,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922617160] [2024-06-27 23:46:17,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922617160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:17,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:17,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:46:17,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966175289] [2024-06-27 23:46:17,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:17,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:46:17,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:17,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:46:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:46:17,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:46:17,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 838 transitions, 15041 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:17,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:17,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:46:17,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:19,777 INFO L124 PetriNetUnfolderBase]: 4388/6951 cut-off events. [2024-06-27 23:46:19,777 INFO L125 PetriNetUnfolderBase]: For 1861919/1861922 co-relation queries the response was YES. [2024-06-27 23:46:19,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79997 conditions, 6951 events. 4388/6951 cut-off events. For 1861919/1861922 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 42992 event pairs, 763 based on Foata normal form. 3/6950 useless extension candidates. Maximal degree in co-relation 79745. Up to 5341 conditions per place. [2024-06-27 23:46:19,905 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 458 selfloop transitions, 408 changer transitions 0/877 dead transitions. [2024-06-27 23:46:19,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 877 transitions, 17119 flow [2024-06-27 23:46:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:46:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:46:19,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-27 23:46:19,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 23:46:19,907 INFO L175 Difference]: Start difference. First operand has 470 places, 838 transitions, 15041 flow. Second operand 12 states and 249 transitions. [2024-06-27 23:46:19,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 877 transitions, 17119 flow [2024-06-27 23:46:24,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 877 transitions, 16157 flow, removed 76 selfloop flow, removed 9 redundant places. [2024-06-27 23:46:24,691 INFO L231 Difference]: Finished difference. Result has 474 places, 841 transitions, 15004 flow [2024-06-27 23:46:24,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14079, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15004, PETRI_PLACES=474, PETRI_TRANSITIONS=841} [2024-06-27 23:46:24,692 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 429 predicate places. [2024-06-27 23:46:24,692 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 841 transitions, 15004 flow [2024-06-27 23:46:24,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:24,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:24,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:24,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 23:46:24,693 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:46:24,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:24,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2015475244, now seen corresponding path program 4 times [2024-06-27 23:46:24,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:24,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387043112] [2024-06-27 23:46:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:24,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:26,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387043112] [2024-06-27 23:46:26,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387043112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:26,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:26,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:46:26,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102934634] [2024-06-27 23:46:26,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:26,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:46:26,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:26,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:46:26,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:46:26,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:46:26,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 841 transitions, 15004 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:26,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:26,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:46:26,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:28,223 INFO L124 PetriNetUnfolderBase]: 4040/6551 cut-off events. [2024-06-27 23:46:28,223 INFO L125 PetriNetUnfolderBase]: For 1964754/1964898 co-relation queries the response was YES. [2024-06-27 23:46:28,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76587 conditions, 6551 events. 4040/6551 cut-off events. For 1964754/1964898 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 41964 event pairs, 852 based on Foata normal form. 78/6545 useless extension candidates. Maximal degree in co-relation 76333. Up to 5649 conditions per place. [2024-06-27 23:46:28,340 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 701 selfloop transitions, 55 changer transitions 0/863 dead transitions. [2024-06-27 23:46:28,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 863 transitions, 16668 flow [2024-06-27 23:46:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:46:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:46:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 23:46:28,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 23:46:28,342 INFO L175 Difference]: Start difference. First operand has 474 places, 841 transitions, 15004 flow. Second operand 8 states and 160 transitions. [2024-06-27 23:46:28,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 863 transitions, 16668 flow [2024-06-27 23:46:34,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 863 transitions, 15689 flow, removed 46 selfloop flow, removed 11 redundant places. [2024-06-27 23:46:34,539 INFO L231 Difference]: Finished difference. Result has 471 places, 844 transitions, 14178 flow [2024-06-27 23:46:34,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14025, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=786, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14178, PETRI_PLACES=471, PETRI_TRANSITIONS=844} [2024-06-27 23:46:34,539 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 426 predicate places. [2024-06-27 23:46:34,540 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 844 transitions, 14178 flow [2024-06-27 23:46:34,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:34,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:34,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:34,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 23:46:34,540 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:46:34,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:34,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1714269102, now seen corresponding path program 1 times [2024-06-27 23:46:34,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:34,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561586281] [2024-06-27 23:46:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:34,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:35,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:35,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561586281] [2024-06-27 23:46:35,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561586281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:35,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:35,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:46:35,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021023401] [2024-06-27 23:46:35,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:35,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:46:35,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:35,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:46:35,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:46:35,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:46:35,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 844 transitions, 14178 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:35,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:35,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:46:35,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:37,867 INFO L124 PetriNetUnfolderBase]: 4159/6717 cut-off events. [2024-06-27 23:46:37,867 INFO L125 PetriNetUnfolderBase]: For 1671376/1671376 co-relation queries the response was YES. [2024-06-27 23:46:37,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73443 conditions, 6717 events. 4159/6717 cut-off events. For 1671376/1671376 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 42542 event pairs, 1044 based on Foata normal form. 1/6715 useless extension candidates. Maximal degree in co-relation 73188. Up to 6110 conditions per place. [2024-06-27 23:46:37,996 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 833 selfloop transitions, 16 changer transitions 0/862 dead transitions. [2024-06-27 23:46:37,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 862 transitions, 16080 flow [2024-06-27 23:46:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:46:37,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:46:37,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 23:46:37,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 23:46:37,997 INFO L175 Difference]: Start difference. First operand has 471 places, 844 transitions, 14178 flow. Second operand 8 states and 153 transitions. [2024-06-27 23:46:37,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 862 transitions, 16080 flow [2024-06-27 23:46:42,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 862 transitions, 15920 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 23:46:42,707 INFO L231 Difference]: Finished difference. Result has 471 places, 847 transitions, 14144 flow [2024-06-27 23:46:42,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14018, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14144, PETRI_PLACES=471, PETRI_TRANSITIONS=847} [2024-06-27 23:46:42,708 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 426 predicate places. [2024-06-27 23:46:42,708 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 847 transitions, 14144 flow [2024-06-27 23:46:42,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:42,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:42,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:42,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 23:46:42,709 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:46:42,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:42,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1199040414, now seen corresponding path program 2 times [2024-06-27 23:46:42,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:42,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003660027] [2024-06-27 23:46:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:42,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:44,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:44,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003660027] [2024-06-27 23:46:44,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003660027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:44,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:44,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:46:44,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901757798] [2024-06-27 23:46:44,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:44,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:46:44,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:44,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:46:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:46:44,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:46:44,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 847 transitions, 14144 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:44,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:44,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:46:44,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:46,175 INFO L124 PetriNetUnfolderBase]: 4169/6731 cut-off events. [2024-06-27 23:46:46,176 INFO L125 PetriNetUnfolderBase]: For 1695674/1695674 co-relation queries the response was YES. [2024-06-27 23:46:46,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73909 conditions, 6731 events. 4169/6731 cut-off events. For 1695674/1695674 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 42600 event pairs, 1044 based on Foata normal form. 1/6729 useless extension candidates. Maximal degree in co-relation 73653. Up to 6118 conditions per place. [2024-06-27 23:46:46,308 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 831 selfloop transitions, 21 changer transitions 0/865 dead transitions. [2024-06-27 23:46:46,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 865 transitions, 16049 flow [2024-06-27 23:46:46,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 23:46:46,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 23:46:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 23:46:46,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 23:46:46,309 INFO L175 Difference]: Start difference. First operand has 471 places, 847 transitions, 14144 flow. Second operand 7 states and 140 transitions. [2024-06-27 23:46:46,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 865 transitions, 16049 flow [2024-06-27 23:46:50,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 865 transitions, 15953 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 23:46:50,739 INFO L231 Difference]: Finished difference. Result has 475 places, 853 transitions, 14231 flow [2024-06-27 23:46:50,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14048, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14231, PETRI_PLACES=475, PETRI_TRANSITIONS=853} [2024-06-27 23:46:50,739 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 430 predicate places. [2024-06-27 23:46:50,740 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 853 transitions, 14231 flow [2024-06-27 23:46:50,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:50,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:50,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:50,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 23:46:50,740 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:46:50,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:50,741 INFO L85 PathProgramCache]: Analyzing trace with hash -693852324, now seen corresponding path program 3 times [2024-06-27 23:46:50,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:50,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871850576] [2024-06-27 23:46:50,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:50,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:46:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:46:52,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:46:52,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871850576] [2024-06-27 23:46:52,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871850576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:46:52,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:46:52,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 23:46:52,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65763487] [2024-06-27 23:46:52,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:46:52,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 23:46:52,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:46:52,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 23:46:52,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 23:46:52,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:46:52,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 853 transitions, 14231 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:52,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:46:52,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:46:52,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:46:54,384 INFO L124 PetriNetUnfolderBase]: 4167/6728 cut-off events. [2024-06-27 23:46:54,384 INFO L125 PetriNetUnfolderBase]: For 1712863/1712866 co-relation queries the response was YES. [2024-06-27 23:46:54,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74208 conditions, 6728 events. 4167/6728 cut-off events. For 1712863/1712866 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 42605 event pairs, 1052 based on Foata normal form. 1/6725 useless extension candidates. Maximal degree in co-relation 73950. Up to 6106 conditions per place. [2024-06-27 23:46:54,502 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 827 selfloop transitions, 28 changer transitions 0/868 dead transitions. [2024-06-27 23:46:54,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 868 transitions, 16122 flow [2024-06-27 23:46:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:46:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:46:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 23:46:54,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-27 23:46:54,503 INFO L175 Difference]: Start difference. First operand has 475 places, 853 transitions, 14231 flow. Second operand 8 states and 151 transitions. [2024-06-27 23:46:54,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 868 transitions, 16122 flow [2024-06-27 23:46:59,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 868 transitions, 16008 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 23:46:59,504 INFO L231 Difference]: Finished difference. Result has 480 places, 859 transitions, 14332 flow [2024-06-27 23:46:59,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14117, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14332, PETRI_PLACES=480, PETRI_TRANSITIONS=859} [2024-06-27 23:46:59,504 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 435 predicate places. [2024-06-27 23:46:59,505 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 859 transitions, 14332 flow [2024-06-27 23:46:59,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:46:59,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:46:59,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:46:59,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 23:46:59,505 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:46:59,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:46:59,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1490027416, now seen corresponding path program 1 times [2024-06-27 23:46:59,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:46:59,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707168584] [2024-06-27 23:46:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:46:59,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:46:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:01,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:01,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707168584] [2024-06-27 23:47:01,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707168584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:01,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:01,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:47:01,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604867655] [2024-06-27 23:47:01,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:01,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:47:01,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:01,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:47:01,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:47:02,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:47:02,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 859 transitions, 14332 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:02,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:02,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:47:02,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:04,500 INFO L124 PetriNetUnfolderBase]: 4425/7010 cut-off events. [2024-06-27 23:47:04,501 INFO L125 PetriNetUnfolderBase]: For 2021115/2021115 co-relation queries the response was YES. [2024-06-27 23:47:04,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81069 conditions, 7010 events. 4425/7010 cut-off events. For 2021115/2021115 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 43392 event pairs, 738 based on Foata normal form. 4/6999 useless extension candidates. Maximal degree in co-relation 80809. Up to 6355 conditions per place. [2024-06-27 23:47:04,635 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 804 selfloop transitions, 73 changer transitions 0/889 dead transitions. [2024-06-27 23:47:04,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 889 transitions, 16298 flow [2024-06-27 23:47:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:47:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:47:04,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 23:47:04,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43388429752066116 [2024-06-27 23:47:04,636 INFO L175 Difference]: Start difference. First operand has 480 places, 859 transitions, 14332 flow. Second operand 11 states and 210 transitions. [2024-06-27 23:47:04,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 889 transitions, 16298 flow [2024-06-27 23:47:09,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 889 transitions, 16154 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 23:47:09,464 INFO L231 Difference]: Finished difference. Result has 487 places, 861 transitions, 14428 flow [2024-06-27 23:47:09,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14188, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=786, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14428, PETRI_PLACES=487, PETRI_TRANSITIONS=861} [2024-06-27 23:47:09,481 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 442 predicate places. [2024-06-27 23:47:09,481 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 861 transitions, 14428 flow [2024-06-27 23:47:09,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:09,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:09,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:09,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 23:47:09,482 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:09,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:09,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2116831312, now seen corresponding path program 2 times [2024-06-27 23:47:09,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:09,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723692731] [2024-06-27 23:47:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:11,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:11,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723692731] [2024-06-27 23:47:11,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723692731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:11,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:11,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:47:11,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790789693] [2024-06-27 23:47:11,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:11,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:47:11,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:11,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:47:11,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:47:11,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:47:11,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 861 transitions, 14428 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:11,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:11,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:47:11,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:14,403 INFO L124 PetriNetUnfolderBase]: 4442/7033 cut-off events. [2024-06-27 23:47:14,403 INFO L125 PetriNetUnfolderBase]: For 2054636/2054636 co-relation queries the response was YES. [2024-06-27 23:47:14,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81827 conditions, 7033 events. 4442/7033 cut-off events. For 2054636/2054636 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 43567 event pairs, 732 based on Foata normal form. 4/7022 useless extension candidates. Maximal degree in co-relation 81566. Up to 6280 conditions per place. [2024-06-27 23:47:14,536 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 801 selfloop transitions, 81 changer transitions 0/894 dead transitions. [2024-06-27 23:47:14,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 894 transitions, 16455 flow [2024-06-27 23:47:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:47:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:47:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 23:47:14,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380165289256198 [2024-06-27 23:47:14,538 INFO L175 Difference]: Start difference. First operand has 487 places, 861 transitions, 14428 flow. Second operand 11 states and 212 transitions. [2024-06-27 23:47:14,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 894 transitions, 16455 flow [2024-06-27 23:47:20,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 894 transitions, 16255 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 23:47:20,251 INFO L231 Difference]: Finished difference. Result has 490 places, 863 transitions, 14489 flow [2024-06-27 23:47:20,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14228, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14489, PETRI_PLACES=490, PETRI_TRANSITIONS=863} [2024-06-27 23:47:20,252 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 445 predicate places. [2024-06-27 23:47:20,252 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 863 transitions, 14489 flow [2024-06-27 23:47:20,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:20,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:20,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:20,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 23:47:20,253 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:20,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:20,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2112247342, now seen corresponding path program 3 times [2024-06-27 23:47:20,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:20,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168116676] [2024-06-27 23:47:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:20,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:22,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:22,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168116676] [2024-06-27 23:47:22,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168116676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:22,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:22,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:47:22,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633519476] [2024-06-27 23:47:22,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:22,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:47:22,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:22,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:47:22,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:47:22,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:47:22,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 863 transitions, 14489 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:22,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:22,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:47:22,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:24,914 INFO L124 PetriNetUnfolderBase]: 4459/7056 cut-off events. [2024-06-27 23:47:24,914 INFO L125 PetriNetUnfolderBase]: For 2086594/2086594 co-relation queries the response was YES. [2024-06-27 23:47:25,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82438 conditions, 7056 events. 4459/7056 cut-off events. For 2086594/2086594 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 43669 event pairs, 706 based on Foata normal form. 4/7045 useless extension candidates. Maximal degree in co-relation 82176. Up to 6130 conditions per place. [2024-06-27 23:47:25,051 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 793 selfloop transitions, 94 changer transitions 0/899 dead transitions. [2024-06-27 23:47:25,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 899 transitions, 16562 flow [2024-06-27 23:47:25,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:47:25,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:47:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 23:47:25,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-27 23:47:25,053 INFO L175 Difference]: Start difference. First operand has 490 places, 863 transitions, 14489 flow. Second operand 11 states and 214 transitions. [2024-06-27 23:47:25,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 899 transitions, 16562 flow [2024-06-27 23:47:30,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 899 transitions, 16327 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-27 23:47:30,093 INFO L231 Difference]: Finished difference. Result has 492 places, 865 transitions, 14545 flow [2024-06-27 23:47:30,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14254, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14545, PETRI_PLACES=492, PETRI_TRANSITIONS=865} [2024-06-27 23:47:30,093 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 447 predicate places. [2024-06-27 23:47:30,093 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 865 transitions, 14545 flow [2024-06-27 23:47:30,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:30,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:30,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:30,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 23:47:30,094 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:30,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:30,096 INFO L85 PathProgramCache]: Analyzing trace with hash -633291218, now seen corresponding path program 4 times [2024-06-27 23:47:30,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:30,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18367595] [2024-06-27 23:47:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:30,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:32,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:32,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18367595] [2024-06-27 23:47:32,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18367595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:32,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:32,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:47:32,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322309158] [2024-06-27 23:47:32,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:32,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:47:32,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:32,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:47:32,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:47:32,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:47:32,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 865 transitions, 14545 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:32,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:32,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:47:32,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:34,864 INFO L124 PetriNetUnfolderBase]: 4476/7081 cut-off events. [2024-06-27 23:47:34,864 INFO L125 PetriNetUnfolderBase]: For 2124337/2124337 co-relation queries the response was YES. [2024-06-27 23:47:34,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83077 conditions, 7081 events. 4476/7081 cut-off events. For 2124337/2124337 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 43898 event pairs, 669 based on Foata normal form. 4/7070 useless extension candidates. Maximal degree in co-relation 82814. Up to 5917 conditions per place. [2024-06-27 23:47:34,997 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 782 selfloop transitions, 114 changer transitions 0/908 dead transitions. [2024-06-27 23:47:34,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 908 transitions, 16682 flow [2024-06-27 23:47:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:47:34,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:47:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-27 23:47:34,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 23:47:34,999 INFO L175 Difference]: Start difference. First operand has 492 places, 865 transitions, 14545 flow. Second operand 12 states and 234 transitions. [2024-06-27 23:47:34,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 908 transitions, 16682 flow [2024-06-27 23:47:40,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 908 transitions, 16434 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-27 23:47:40,777 INFO L231 Difference]: Finished difference. Result has 496 places, 867 transitions, 14632 flow [2024-06-27 23:47:40,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14297, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14632, PETRI_PLACES=496, PETRI_TRANSITIONS=867} [2024-06-27 23:47:40,778 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 451 predicate places. [2024-06-27 23:47:40,778 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 867 transitions, 14632 flow [2024-06-27 23:47:40,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:40,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:40,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:40,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 23:47:40,778 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:40,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:40,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1415163506, now seen corresponding path program 5 times [2024-06-27 23:47:40,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:40,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661590308] [2024-06-27 23:47:40,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:40,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:42,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:42,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661590308] [2024-06-27 23:47:42,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661590308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:42,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:42,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:47:42,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295143642] [2024-06-27 23:47:42,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:42,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:47:42,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:42,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:47:42,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:47:43,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:47:43,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 867 transitions, 14632 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:43,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:43,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:47:43,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:45,729 INFO L124 PetriNetUnfolderBase]: 4493/7130 cut-off events. [2024-06-27 23:47:45,729 INFO L125 PetriNetUnfolderBase]: For 2158256/2158259 co-relation queries the response was YES. [2024-06-27 23:47:45,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83767 conditions, 7130 events. 4493/7130 cut-off events. For 2158256/2158259 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 44377 event pairs, 791 based on Foata normal form. 4/7115 useless extension candidates. Maximal degree in co-relation 83503. Up to 5876 conditions per place. [2024-06-27 23:47:45,849 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 621 selfloop transitions, 270 changer transitions 0/903 dead transitions. [2024-06-27 23:47:45,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 903 transitions, 16791 flow [2024-06-27 23:47:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:47:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:47:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-27 23:47:45,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524793388429752 [2024-06-27 23:47:45,851 INFO L175 Difference]: Start difference. First operand has 496 places, 867 transitions, 14632 flow. Second operand 11 states and 219 transitions. [2024-06-27 23:47:45,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 903 transitions, 16791 flow [2024-06-27 23:47:51,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 903 transitions, 16475 flow, removed 44 selfloop flow, removed 11 redundant places. [2024-06-27 23:47:51,467 INFO L231 Difference]: Finished difference. Result has 496 places, 869 transitions, 14965 flow [2024-06-27 23:47:51,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14316, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14965, PETRI_PLACES=496, PETRI_TRANSITIONS=869} [2024-06-27 23:47:51,468 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 451 predicate places. [2024-06-27 23:47:51,468 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 869 transitions, 14965 flow [2024-06-27 23:47:51,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:51,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:47:51,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:47:51,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 23:47:51,468 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:47:51,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:47:51,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1408907396, now seen corresponding path program 6 times [2024-06-27 23:47:51,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:47:51,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022506606] [2024-06-27 23:47:51,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:47:51,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:47:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:47:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:47:53,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:47:53,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022506606] [2024-06-27 23:47:53,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022506606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:47:53,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:47:53,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:47:53,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650338120] [2024-06-27 23:47:53,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:47:53,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:47:53,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:47:53,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:47:53,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:47:53,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:47:53,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 869 transitions, 14965 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:47:53,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:47:53,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:47:53,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:47:56,313 INFO L124 PetriNetUnfolderBase]: 4510/7147 cut-off events. [2024-06-27 23:47:56,314 INFO L125 PetriNetUnfolderBase]: For 2197848/2197851 co-relation queries the response was YES. [2024-06-27 23:47:56,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84700 conditions, 7147 events. 4510/7147 cut-off events. For 2197848/2197851 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 44395 event pairs, 786 based on Foata normal form. 4/7130 useless extension candidates. Maximal degree in co-relation 84435. Up to 5903 conditions per place. [2024-06-27 23:47:56,458 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 632 selfloop transitions, 263 changer transitions 0/907 dead transitions. [2024-06-27 23:47:56,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 907 transitions, 17178 flow [2024-06-27 23:47:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:47:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:47:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-27 23:47:56,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 23:47:56,459 INFO L175 Difference]: Start difference. First operand has 496 places, 869 transitions, 14965 flow. Second operand 11 states and 220 transitions. [2024-06-27 23:47:56,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 907 transitions, 17178 flow [2024-06-27 23:48:03,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 907 transitions, 16499 flow, removed 46 selfloop flow, removed 10 redundant places. [2024-06-27 23:48:03,057 INFO L231 Difference]: Finished difference. Result has 497 places, 871 transitions, 14925 flow [2024-06-27 23:48:03,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14286, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=869, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14925, PETRI_PLACES=497, PETRI_TRANSITIONS=871} [2024-06-27 23:48:03,058 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 452 predicate places. [2024-06-27 23:48:03,058 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 871 transitions, 14925 flow [2024-06-27 23:48:03,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:03,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:03,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:03,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 23:48:03,059 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:03,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:03,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1242673616, now seen corresponding path program 7 times [2024-06-27 23:48:03,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:03,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906552791] [2024-06-27 23:48:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:03,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:05,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:05,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906552791] [2024-06-27 23:48:05,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906552791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:05,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:05,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:48:05,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050310008] [2024-06-27 23:48:05,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:05,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:48:05,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:05,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:48:05,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:48:05,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:48:05,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 871 transitions, 14925 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:05,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:05,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:48:05,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:08,175 INFO L124 PetriNetUnfolderBase]: 4527/7186 cut-off events. [2024-06-27 23:48:08,175 INFO L125 PetriNetUnfolderBase]: For 2228086/2228089 co-relation queries the response was YES. [2024-06-27 23:48:08,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85180 conditions, 7186 events. 4527/7186 cut-off events. For 2228086/2228089 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 44816 event pairs, 797 based on Foata normal form. 4/7167 useless extension candidates. Maximal degree in co-relation 84915. Up to 5930 conditions per place. [2024-06-27 23:48:08,323 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 637 selfloop transitions, 259 changer transitions 0/908 dead transitions. [2024-06-27 23:48:08,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 908 transitions, 17124 flow [2024-06-27 23:48:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:48:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:48:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-27 23:48:08,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-27 23:48:08,325 INFO L175 Difference]: Start difference. First operand has 497 places, 871 transitions, 14925 flow. Second operand 11 states and 221 transitions. [2024-06-27 23:48:08,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 908 transitions, 17124 flow [2024-06-27 23:48:14,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 908 transitions, 16493 flow, removed 48 selfloop flow, removed 10 redundant places. [2024-06-27 23:48:14,722 INFO L231 Difference]: Finished difference. Result has 498 places, 873 transitions, 14929 flow [2024-06-27 23:48:14,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14294, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14929, PETRI_PLACES=498, PETRI_TRANSITIONS=873} [2024-06-27 23:48:14,723 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 453 predicate places. [2024-06-27 23:48:14,723 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 873 transitions, 14929 flow [2024-06-27 23:48:14,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:14,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:14,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:14,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 23:48:14,723 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:14,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1408729766, now seen corresponding path program 8 times [2024-06-27 23:48:14,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:14,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925994090] [2024-06-27 23:48:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:14,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:16,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:16,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925994090] [2024-06-27 23:48:16,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925994090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:16,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:16,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:48:16,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401528117] [2024-06-27 23:48:16,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:16,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:48:16,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:16,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:48:16,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:48:17,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:48:17,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 873 transitions, 14929 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:17,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:17,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:48:17,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:19,860 INFO L124 PetriNetUnfolderBase]: 4544/7211 cut-off events. [2024-06-27 23:48:19,861 INFO L125 PetriNetUnfolderBase]: For 2262048/2262051 co-relation queries the response was YES. [2024-06-27 23:48:19,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85695 conditions, 7211 events. 4544/7211 cut-off events. For 2262048/2262051 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 44900 event pairs, 796 based on Foata normal form. 4/7194 useless extension candidates. Maximal degree in co-relation 85429. Up to 5873 conditions per place. [2024-06-27 23:48:19,981 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 632 selfloop transitions, 268 changer transitions 0/912 dead transitions. [2024-06-27 23:48:19,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 912 transitions, 17172 flow [2024-06-27 23:48:19,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:48:19,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:48:19,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-27 23:48:19,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-27 23:48:19,982 INFO L175 Difference]: Start difference. First operand has 498 places, 873 transitions, 14929 flow. Second operand 11 states and 221 transitions. [2024-06-27 23:48:19,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 912 transitions, 17172 flow [2024-06-27 23:48:25,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 912 transitions, 16559 flow, removed 50 selfloop flow, removed 9 redundant places. [2024-06-27 23:48:25,798 INFO L231 Difference]: Finished difference. Result has 500 places, 875 transitions, 14972 flow [2024-06-27 23:48:25,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14316, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14972, PETRI_PLACES=500, PETRI_TRANSITIONS=875} [2024-06-27 23:48:25,799 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 455 predicate places. [2024-06-27 23:48:25,799 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 875 transitions, 14972 flow [2024-06-27 23:48:25,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:25,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:25,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:25,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 23:48:25,800 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:25,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:25,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1242495986, now seen corresponding path program 9 times [2024-06-27 23:48:25,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:25,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553699614] [2024-06-27 23:48:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:25,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:27,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:27,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553699614] [2024-06-27 23:48:27,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553699614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:27,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:27,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:48:27,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972560792] [2024-06-27 23:48:27,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:27,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:48:27,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:27,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:48:27,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:48:28,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:48:28,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 875 transitions, 14972 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:28,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:28,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:48:28,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:30,554 INFO L124 PetriNetUnfolderBase]: 4561/7240 cut-off events. [2024-06-27 23:48:30,554 INFO L125 PetriNetUnfolderBase]: For 2295553/2295556 co-relation queries the response was YES. [2024-06-27 23:48:30,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86296 conditions, 7240 events. 4561/7240 cut-off events. For 2295553/2295556 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 45194 event pairs, 802 based on Foata normal form. 4/7221 useless extension candidates. Maximal degree in co-relation 86029. Up to 5924 conditions per place. [2024-06-27 23:48:30,693 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 640 selfloop transitions, 262 changer transitions 0/914 dead transitions. [2024-06-27 23:48:30,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 914 transitions, 17223 flow [2024-06-27 23:48:30,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:48:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:48:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-27 23:48:30,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607438016528926 [2024-06-27 23:48:30,694 INFO L175 Difference]: Start difference. First operand has 500 places, 875 transitions, 14972 flow. Second operand 11 states and 223 transitions. [2024-06-27 23:48:30,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 914 transitions, 17223 flow [2024-06-27 23:48:36,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 914 transitions, 16587 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-27 23:48:36,940 INFO L231 Difference]: Finished difference. Result has 502 places, 877 transitions, 14984 flow [2024-06-27 23:48:36,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14336, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14984, PETRI_PLACES=502, PETRI_TRANSITIONS=877} [2024-06-27 23:48:36,940 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 457 predicate places. [2024-06-27 23:48:36,940 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 877 transitions, 14984 flow [2024-06-27 23:48:36,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:36,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:36,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:36,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 23:48:36,941 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:36,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1237912016, now seen corresponding path program 10 times [2024-06-27 23:48:36,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:36,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835190589] [2024-06-27 23:48:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:36,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:39,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:39,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835190589] [2024-06-27 23:48:39,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835190589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:39,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:39,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:48:39,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140649333] [2024-06-27 23:48:39,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:39,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:48:39,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:39,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:48:39,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:48:39,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:48:39,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 877 transitions, 14984 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:39,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:39,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:48:39,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:41,875 INFO L124 PetriNetUnfolderBase]: 4578/7267 cut-off events. [2024-06-27 23:48:41,875 INFO L125 PetriNetUnfolderBase]: For 2331385/2331388 co-relation queries the response was YES. [2024-06-27 23:48:41,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86817 conditions, 7267 events. 4578/7267 cut-off events. For 2331385/2331388 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 45398 event pairs, 794 based on Foata normal form. 4/7247 useless extension candidates. Maximal degree in co-relation 86549. Up to 5747 conditions per place. [2024-06-27 23:48:42,016 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 629 selfloop transitions, 275 changer transitions 0/916 dead transitions. [2024-06-27 23:48:42,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 916 transitions, 17233 flow [2024-06-27 23:48:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:48:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:48:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-27 23:48:42,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607438016528926 [2024-06-27 23:48:42,018 INFO L175 Difference]: Start difference. First operand has 502 places, 877 transitions, 14984 flow. Second operand 11 states and 223 transitions. [2024-06-27 23:48:42,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 916 transitions, 17233 flow [2024-06-27 23:48:48,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 916 transitions, 16605 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-06-27 23:48:48,720 INFO L231 Difference]: Finished difference. Result has 504 places, 879 transitions, 15034 flow [2024-06-27 23:48:48,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14356, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15034, PETRI_PLACES=504, PETRI_TRANSITIONS=879} [2024-06-27 23:48:48,720 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 459 predicate places. [2024-06-27 23:48:48,720 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 879 transitions, 15034 flow [2024-06-27 23:48:48,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:48,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:48:48,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:48:48,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 23:48:48,721 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:48:48,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:48:48,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1415409770, now seen corresponding path program 1 times [2024-06-27 23:48:48,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:48:48,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407061784] [2024-06-27 23:48:48,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:48:48,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:48:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:48:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:48:51,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:48:51,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407061784] [2024-06-27 23:48:51,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407061784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:48:51,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:48:51,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:48:51,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757658485] [2024-06-27 23:48:51,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:48:51,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:48:51,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:48:51,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:48:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:48:51,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:48:51,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 879 transitions, 15034 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:48:51,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:48:51,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:48:51,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:48:54,093 INFO L124 PetriNetUnfolderBase]: 4604/7311 cut-off events. [2024-06-27 23:48:54,094 INFO L125 PetriNetUnfolderBase]: For 2389304/2389310 co-relation queries the response was YES. [2024-06-27 23:48:54,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87531 conditions, 7311 events. 4604/7311 cut-off events. For 2389304/2389310 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 45818 event pairs, 908 based on Foata normal form. 8/7311 useless extension candidates. Maximal degree in co-relation 87262. Up to 6459 conditions per place. [2024-06-27 23:48:54,231 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 778 selfloop transitions, 125 changer transitions 0/915 dead transitions. [2024-06-27 23:48:54,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 915 transitions, 17223 flow [2024-06-27 23:48:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 23:48:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 23:48:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 231 transitions. [2024-06-27 23:48:54,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 23:48:54,232 INFO L175 Difference]: Start difference. First operand has 504 places, 879 transitions, 15034 flow. Second operand 12 states and 231 transitions. [2024-06-27 23:48:54,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 915 transitions, 17223 flow [2024-06-27 23:49:01,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 915 transitions, 16565 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-27 23:49:01,089 INFO L231 Difference]: Finished difference. Result has 507 places, 882 transitions, 14787 flow [2024-06-27 23:49:01,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14376, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=754, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14787, PETRI_PLACES=507, PETRI_TRANSITIONS=882} [2024-06-27 23:49:01,090 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 462 predicate places. [2024-06-27 23:49:01,090 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 882 transitions, 14787 flow [2024-06-27 23:49:01,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:01,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:01,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:01,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 23:49:01,090 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:01,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:01,091 INFO L85 PathProgramCache]: Analyzing trace with hash -877766990, now seen corresponding path program 1 times [2024-06-27 23:49:01,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:01,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460710455] [2024-06-27 23:49:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:01,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:02,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:02,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460710455] [2024-06-27 23:49:02,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460710455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:02,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:02,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:02,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753564410] [2024-06-27 23:49:02,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:02,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:02,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:02,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:02,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:02,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:49:02,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 882 transitions, 14787 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:02,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:02,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:49:02,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:04,980 INFO L124 PetriNetUnfolderBase]: 4450/7134 cut-off events. [2024-06-27 23:49:04,980 INFO L125 PetriNetUnfolderBase]: For 2367473/2367476 co-relation queries the response was YES. [2024-06-27 23:49:05,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85495 conditions, 7134 events. 4450/7134 cut-off events. For 2367473/2367476 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 45276 event pairs, 757 based on Foata normal form. 4/7102 useless extension candidates. Maximal degree in co-relation 85225. Up to 6106 conditions per place. [2024-06-27 23:49:05,109 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 708 selfloop transitions, 110 changer transitions 0/902 dead transitions. [2024-06-27 23:49:05,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 902 transitions, 16583 flow [2024-06-27 23:49:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:05,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 23:49:05,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-27 23:49:05,113 INFO L175 Difference]: Start difference. First operand has 507 places, 882 transitions, 14787 flow. Second operand 9 states and 173 transitions. [2024-06-27 23:49:05,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 902 transitions, 16583 flow [2024-06-27 23:49:11,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 902 transitions, 16092 flow, removed 69 selfloop flow, removed 11 redundant places. [2024-06-27 23:49:11,553 INFO L231 Difference]: Finished difference. Result has 505 places, 886 transitions, 14620 flow [2024-06-27 23:49:11,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14296, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14620, PETRI_PLACES=505, PETRI_TRANSITIONS=886} [2024-06-27 23:49:11,555 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 460 predicate places. [2024-06-27 23:49:11,555 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 886 transitions, 14620 flow [2024-06-27 23:49:11,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:11,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:11,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:11,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 23:49:11,557 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:11,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:11,557 INFO L85 PathProgramCache]: Analyzing trace with hash -866667440, now seen corresponding path program 2 times [2024-06-27 23:49:11,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:11,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49331508] [2024-06-27 23:49:11,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:11,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:13,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:13,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49331508] [2024-06-27 23:49:13,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49331508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:13,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:13,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:13,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241889699] [2024-06-27 23:49:13,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:13,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:13,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:13,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:13,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:13,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:49:13,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 886 transitions, 14620 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:13,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:13,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:49:13,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:15,389 INFO L124 PetriNetUnfolderBase]: 4484/7178 cut-off events. [2024-06-27 23:49:15,389 INFO L125 PetriNetUnfolderBase]: For 2430389/2430392 co-relation queries the response was YES. [2024-06-27 23:49:15,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86648 conditions, 7178 events. 4484/7178 cut-off events. For 2430389/2430392 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 45572 event pairs, 757 based on Foata normal form. 4/7141 useless extension candidates. Maximal degree in co-relation 86378. Up to 6043 conditions per place. [2024-06-27 23:49:15,526 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 701 selfloop transitions, 129 changer transitions 0/914 dead transitions. [2024-06-27 23:49:15,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 914 transitions, 17182 flow [2024-06-27 23:49:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 23:49:15,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-27 23:49:15,528 INFO L175 Difference]: Start difference. First operand has 505 places, 886 transitions, 14620 flow. Second operand 8 states and 163 transitions. [2024-06-27 23:49:15,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 914 transitions, 17182 flow [2024-06-27 23:49:23,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 914 transitions, 16873 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-27 23:49:23,353 INFO L231 Difference]: Finished difference. Result has 505 places, 897 transitions, 14871 flow [2024-06-27 23:49:23,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14311, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14871, PETRI_PLACES=505, PETRI_TRANSITIONS=897} [2024-06-27 23:49:23,353 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 460 predicate places. [2024-06-27 23:49:23,353 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 897 transitions, 14871 flow [2024-06-27 23:49:23,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:23,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:23,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:23,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 23:49:23,354 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:23,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1360782774, now seen corresponding path program 3 times [2024-06-27 23:49:23,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:23,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671782999] [2024-06-27 23:49:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:23,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:24,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:24,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671782999] [2024-06-27 23:49:24,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671782999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:24,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:24,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:24,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84947992] [2024-06-27 23:49:24,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:24,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:24,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:24,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:24,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:25,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:49:25,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 897 transitions, 14871 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:25,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:25,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:49:25,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:27,389 INFO L124 PetriNetUnfolderBase]: 4478/7175 cut-off events. [2024-06-27 23:49:27,389 INFO L125 PetriNetUnfolderBase]: For 2449740/2449743 co-relation queries the response was YES. [2024-06-27 23:49:27,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87078 conditions, 7175 events. 4478/7175 cut-off events. For 2449740/2449743 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 45550 event pairs, 756 based on Foata normal form. 4/7143 useless extension candidates. Maximal degree in co-relation 86807. Up to 6038 conditions per place. [2024-06-27 23:49:27,527 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 700 selfloop transitions, 131 changer transitions 0/915 dead transitions. [2024-06-27 23:49:27,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 915 transitions, 17199 flow [2024-06-27 23:49:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 23:49:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 23:49:27,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 23:49:27,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-27 23:49:27,529 INFO L175 Difference]: Start difference. First operand has 505 places, 897 transitions, 14871 flow. Second operand 8 states and 162 transitions. [2024-06-27 23:49:27,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 915 transitions, 17199 flow [2024-06-27 23:49:35,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 915 transitions, 16860 flow, removed 91 selfloop flow, removed 5 redundant places. [2024-06-27 23:49:35,440 INFO L231 Difference]: Finished difference. Result has 508 places, 897 transitions, 14802 flow [2024-06-27 23:49:35,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14532, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=766, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14802, PETRI_PLACES=508, PETRI_TRANSITIONS=897} [2024-06-27 23:49:35,446 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 463 predicate places. [2024-06-27 23:49:35,446 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 897 transitions, 14802 flow [2024-06-27 23:49:35,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:35,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:35,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:35,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 23:49:35,447 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:35,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash -210118879, now seen corresponding path program 1 times [2024-06-27 23:49:35,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:35,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338867311] [2024-06-27 23:49:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:35,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:37,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:37,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338867311] [2024-06-27 23:49:37,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338867311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:37,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:37,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 23:49:37,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054774542] [2024-06-27 23:49:37,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:37,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 23:49:37,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:37,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 23:49:37,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 23:49:37,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 23:49:37,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 897 transitions, 14802 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:37,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:37,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 23:49:37,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:39,408 INFO L124 PetriNetUnfolderBase]: 4289/6927 cut-off events. [2024-06-27 23:49:39,408 INFO L125 PetriNetUnfolderBase]: For 2555937/2556082 co-relation queries the response was YES. [2024-06-27 23:49:39,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85536 conditions, 6927 events. 4289/6927 cut-off events. For 2555937/2556082 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 44591 event pairs, 792 based on Foata normal form. 77/6902 useless extension candidates. Maximal degree in co-relation 85263. Up to 5966 conditions per place. [2024-06-27 23:49:39,547 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 746 selfloop transitions, 54 changer transitions 0/914 dead transitions. [2024-06-27 23:49:39,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 914 transitions, 16551 flow [2024-06-27 23:49:39,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 23:49:39,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 23:49:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 23:49:39,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-27 23:49:39,549 INFO L175 Difference]: Start difference. First operand has 508 places, 897 transitions, 14802 flow. Second operand 9 states and 169 transitions. [2024-06-27 23:49:39,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 914 transitions, 16551 flow [2024-06-27 23:49:48,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 914 transitions, 16290 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 23:49:48,556 INFO L231 Difference]: Finished difference. Result has 511 places, 900 transitions, 14726 flow [2024-06-27 23:49:48,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14541, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14726, PETRI_PLACES=511, PETRI_TRANSITIONS=900} [2024-06-27 23:49:48,557 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 466 predicate places. [2024-06-27 23:49:48,557 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 900 transitions, 14726 flow [2024-06-27 23:49:48,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:48,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:49:48,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:49:48,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 23:49:48,557 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:49:48,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:49:48,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1139684568, now seen corresponding path program 11 times [2024-06-27 23:49:48,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:49:48,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343353432] [2024-06-27 23:49:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:49:48,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:49:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:49:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:49:50,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:49:50,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343353432] [2024-06-27 23:49:50,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343353432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:49:50,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:49:50,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:49:50,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833757949] [2024-06-27 23:49:50,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:49:50,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:49:50,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:49:50,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:49:50,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:49:50,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:49:50,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 900 transitions, 14726 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:49:50,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:49:50,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:49:50,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:49:53,863 INFO L124 PetriNetUnfolderBase]: 4688/7401 cut-off events. [2024-06-27 23:49:53,863 INFO L125 PetriNetUnfolderBase]: For 2537050/2537050 co-relation queries the response was YES. [2024-06-27 23:49:53,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90468 conditions, 7401 events. 4688/7401 cut-off events. For 2537050/2537050 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 45934 event pairs, 732 based on Foata normal form. 4/7386 useless extension candidates. Maximal degree in co-relation 90194. Up to 6152 conditions per place. [2024-06-27 23:49:54,029 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 614 selfloop transitions, 303 changer transitions 0/933 dead transitions. [2024-06-27 23:49:54,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 933 transitions, 16934 flow [2024-06-27 23:49:54,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:49:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:49:54,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 23:49:54,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-27 23:49:54,031 INFO L175 Difference]: Start difference. First operand has 511 places, 900 transitions, 14726 flow. Second operand 11 states and 214 transitions. [2024-06-27 23:49:54,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 933 transitions, 16934 flow [2024-06-27 23:50:03,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 933 transitions, 16756 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 23:50:03,072 INFO L231 Difference]: Finished difference. Result has 515 places, 902 transitions, 15288 flow [2024-06-27 23:50:03,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14548, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15288, PETRI_PLACES=515, PETRI_TRANSITIONS=902} [2024-06-27 23:50:03,073 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 470 predicate places. [2024-06-27 23:50:03,073 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 902 transitions, 15288 flow [2024-06-27 23:50:03,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:03,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:03,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:03,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 23:50:03,073 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:03,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:03,074 INFO L85 PathProgramCache]: Analyzing trace with hash 60948986, now seen corresponding path program 12 times [2024-06-27 23:50:03,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:03,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548344967] [2024-06-27 23:50:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:03,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:05,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548344967] [2024-06-27 23:50:05,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548344967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:05,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:05,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:50:05,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522065937] [2024-06-27 23:50:05,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:05,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:50:05,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:05,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:50:05,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:50:05,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:50:05,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 902 transitions, 15288 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:05,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:05,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:50:05,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:08,501 INFO L124 PetriNetUnfolderBase]: 4705/7444 cut-off events. [2024-06-27 23:50:08,501 INFO L125 PetriNetUnfolderBase]: For 2583047/2583047 co-relation queries the response was YES. [2024-06-27 23:50:08,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92045 conditions, 7444 events. 4705/7444 cut-off events. For 2583047/2583047 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 46447 event pairs, 734 based on Foata normal form. 4/7430 useless extension candidates. Maximal degree in co-relation 91771. Up to 6179 conditions per place. [2024-06-27 23:50:08,928 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 666 selfloop transitions, 260 changer transitions 0/942 dead transitions. [2024-06-27 23:50:08,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 942 transitions, 17658 flow [2024-06-27 23:50:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:50:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:50:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 23:50:08,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-27 23:50:08,930 INFO L175 Difference]: Start difference. First operand has 515 places, 902 transitions, 15288 flow. Second operand 11 states and 217 transitions. [2024-06-27 23:50:08,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 942 transitions, 17658 flow [2024-06-27 23:50:17,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 942 transitions, 16765 flow, removed 59 selfloop flow, removed 11 redundant places. [2024-06-27 23:50:17,319 INFO L231 Difference]: Finished difference. Result has 515 places, 904 transitions, 15053 flow [2024-06-27 23:50:17,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14395, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15053, PETRI_PLACES=515, PETRI_TRANSITIONS=904} [2024-06-27 23:50:17,320 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 470 predicate places. [2024-06-27 23:50:17,320 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 904 transitions, 15053 flow [2024-06-27 23:50:17,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:17,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:17,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:17,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 23:50:17,321 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:17,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:17,322 INFO L85 PathProgramCache]: Analyzing trace with hash 30622040, now seen corresponding path program 13 times [2024-06-27 23:50:17,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:17,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713378471] [2024-06-27 23:50:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:17,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:19,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:19,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713378471] [2024-06-27 23:50:19,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713378471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:19,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:19,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:50:19,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843096375] [2024-06-27 23:50:19,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:19,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:50:19,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:19,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:50:19,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:50:19,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:50:19,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 904 transitions, 15053 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:19,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:19,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:50:19,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:23,086 INFO L124 PetriNetUnfolderBase]: 4722/7460 cut-off events. [2024-06-27 23:50:23,086 INFO L125 PetriNetUnfolderBase]: For 2618820/2618820 co-relation queries the response was YES. [2024-06-27 23:50:23,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92277 conditions, 7460 events. 4722/7460 cut-off events. For 2618820/2618820 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 46412 event pairs, 734 based on Foata normal form. 4/7445 useless extension candidates. Maximal degree in co-relation 92003. Up to 6206 conditions per place. [2024-06-27 23:50:23,224 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 648 selfloop transitions, 277 changer transitions 0/941 dead transitions. [2024-06-27 23:50:23,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 941 transitions, 17360 flow [2024-06-27 23:50:23,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:50:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:50:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 23:50:23,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2024-06-27 23:50:23,226 INFO L175 Difference]: Start difference. First operand has 515 places, 904 transitions, 15053 flow. Second operand 11 states and 216 transitions. [2024-06-27 23:50:23,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 941 transitions, 17360 flow [2024-06-27 23:50:32,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 941 transitions, 16676 flow, removed 61 selfloop flow, removed 11 redundant places. [2024-06-27 23:50:32,895 INFO L231 Difference]: Finished difference. Result has 515 places, 906 transitions, 15065 flow [2024-06-27 23:50:32,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14369, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15065, PETRI_PLACES=515, PETRI_TRANSITIONS=906} [2024-06-27 23:50:32,896 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 470 predicate places. [2024-06-27 23:50:32,896 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 906 transitions, 15065 flow [2024-06-27 23:50:32,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:32,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:32,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:32,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 23:50:32,896 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:32,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash 24192950, now seen corresponding path program 14 times [2024-06-27 23:50:32,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:32,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412906977] [2024-06-27 23:50:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:32,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:35,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:35,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:35,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412906977] [2024-06-27 23:50:35,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412906977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:35,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:35,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:50:35,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794212974] [2024-06-27 23:50:35,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:35,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:50:35,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:35,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:50:35,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:50:35,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:50:35,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 906 transitions, 15065 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:35,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:35,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:50:35,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:38,466 INFO L124 PetriNetUnfolderBase]: 4739/7477 cut-off events. [2024-06-27 23:50:38,467 INFO L125 PetriNetUnfolderBase]: For 2656351/2656351 co-relation queries the response was YES. [2024-06-27 23:50:38,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92831 conditions, 7477 events. 4739/7477 cut-off events. For 2656351/2656351 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 46518 event pairs, 734 based on Foata normal form. 4/7462 useless extension candidates. Maximal degree in co-relation 92557. Up to 6233 conditions per place. [2024-06-27 23:50:38,604 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 646 selfloop transitions, 279 changer transitions 0/941 dead transitions. [2024-06-27 23:50:38,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 941 transitions, 17338 flow [2024-06-27 23:50:38,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:50:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:50:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 23:50:38,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-27 23:50:38,605 INFO L175 Difference]: Start difference. First operand has 515 places, 906 transitions, 15065 flow. Second operand 11 states and 215 transitions. [2024-06-27 23:50:38,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 941 transitions, 17338 flow [2024-06-27 23:50:47,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 941 transitions, 16616 flow, removed 63 selfloop flow, removed 11 redundant places. [2024-06-27 23:50:47,359 INFO L231 Difference]: Finished difference. Result has 515 places, 908 transitions, 15047 flow [2024-06-27 23:50:47,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14343, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=906, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15047, PETRI_PLACES=515, PETRI_TRANSITIONS=908} [2024-06-27 23:50:47,360 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 470 predicate places. [2024-06-27 23:50:47,360 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 908 transitions, 15047 flow [2024-06-27 23:50:47,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:47,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:50:47,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:50:47,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 23:50:47,361 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:50:47,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:50:47,361 INFO L85 PathProgramCache]: Analyzing trace with hash 24188300, now seen corresponding path program 15 times [2024-06-27 23:50:47,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:50:47,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334738386] [2024-06-27 23:50:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:50:47,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:50:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:50:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:50:49,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:50:49,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334738386] [2024-06-27 23:50:49,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334738386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:50:49,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:50:49,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:50:49,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020502429] [2024-06-27 23:50:49,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:50:49,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:50:49,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:50:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:50:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:50:49,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:50:49,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 908 transitions, 15047 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:50:49,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:50:49,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:50:49,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:50:53,162 INFO L124 PetriNetUnfolderBase]: 4756/7514 cut-off events. [2024-06-27 23:50:53,162 INFO L125 PetriNetUnfolderBase]: For 2694006/2694006 co-relation queries the response was YES. [2024-06-27 23:50:53,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93350 conditions, 7514 events. 4756/7514 cut-off events. For 2694006/2694006 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 46864 event pairs, 734 based on Foata normal form. 4/7499 useless extension candidates. Maximal degree in co-relation 93076. Up to 6174 conditions per place. [2024-06-27 23:50:53,401 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 643 selfloop transitions, 285 changer transitions 0/944 dead transitions. [2024-06-27 23:50:53,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 944 transitions, 17342 flow [2024-06-27 23:50:53,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:50:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:50:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 23:50:53,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2024-06-27 23:50:53,402 INFO L175 Difference]: Start difference. First operand has 515 places, 908 transitions, 15047 flow. Second operand 11 states and 216 transitions. [2024-06-27 23:50:53,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 944 transitions, 17342 flow [2024-06-27 23:51:04,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 944 transitions, 16658 flow, removed 65 selfloop flow, removed 9 redundant places. [2024-06-27 23:51:04,343 INFO L231 Difference]: Finished difference. Result has 517 places, 910 transitions, 15082 flow [2024-06-27 23:51:04,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14363, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=908, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15082, PETRI_PLACES=517, PETRI_TRANSITIONS=910} [2024-06-27 23:51:04,343 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 472 predicate places. [2024-06-27 23:51:04,344 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 910 transitions, 15082 flow [2024-06-27 23:51:04,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:04,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:04,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:04,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 23:51:04,344 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:04,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:04,344 INFO L85 PathProgramCache]: Analyzing trace with hash 54692876, now seen corresponding path program 16 times [2024-06-27 23:51:04,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:04,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000294741] [2024-06-27 23:51:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:04,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:06,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:06,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000294741] [2024-06-27 23:51:06,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000294741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:06,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:06,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:51:06,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411219352] [2024-06-27 23:51:06,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:06,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:51:06,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:06,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:51:06,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:51:06,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:51:06,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 910 transitions, 15082 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:06,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:06,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:51:06,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:09,792 INFO L124 PetriNetUnfolderBase]: 4773/7552 cut-off events. [2024-06-27 23:51:09,792 INFO L125 PetriNetUnfolderBase]: For 2732731/2732731 co-relation queries the response was YES. [2024-06-27 23:51:09,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93951 conditions, 7552 events. 4773/7552 cut-off events. For 2732731/2732731 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 47248 event pairs, 744 based on Foata normal form. 4/7538 useless extension candidates. Maximal degree in co-relation 93676. Up to 6287 conditions per place. [2024-06-27 23:51:09,930 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 678 selfloop transitions, 258 changer transitions 0/952 dead transitions. [2024-06-27 23:51:09,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 952 transitions, 17530 flow [2024-06-27 23:51:09,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:51:09,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:51:09,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-27 23:51:09,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-06-27 23:51:09,932 INFO L175 Difference]: Start difference. First operand has 517 places, 910 transitions, 15082 flow. Second operand 11 states and 218 transitions. [2024-06-27 23:51:09,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 952 transitions, 17530 flow [2024-06-27 23:51:18,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 952 transitions, 16829 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-06-27 23:51:18,901 INFO L231 Difference]: Finished difference. Result has 519 places, 912 transitions, 15051 flow [2024-06-27 23:51:18,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14381, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15051, PETRI_PLACES=519, PETRI_TRANSITIONS=912} [2024-06-27 23:51:18,902 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 474 predicate places. [2024-06-27 23:51:18,902 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 912 transitions, 15051 flow [2024-06-27 23:51:18,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:18,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 23:51:18,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 23:51:18,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 23:51:18,903 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 23:51:18,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 23:51:18,903 INFO L85 PathProgramCache]: Analyzing trace with hash 54515246, now seen corresponding path program 17 times [2024-06-27 23:51:18,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 23:51:18,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136227832] [2024-06-27 23:51:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 23:51:18,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 23:51:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 23:51:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 23:51:21,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 23:51:21,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136227832] [2024-06-27 23:51:21,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136227832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 23:51:21,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 23:51:21,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 23:51:21,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374687583] [2024-06-27 23:51:21,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 23:51:21,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 23:51:21,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 23:51:21,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 23:51:21,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 23:51:21,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 23:51:21,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 912 transitions, 15051 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 23:51:21,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 23:51:21,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 23:51:21,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 23:51:24,501 INFO L124 PetriNetUnfolderBase]: 4790/7579 cut-off events. [2024-06-27 23:51:24,501 INFO L125 PetriNetUnfolderBase]: For 2771834/2771834 co-relation queries the response was YES. [2024-06-27 23:51:24,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94368 conditions, 7579 events. 4790/7579 cut-off events. For 2771834/2771834 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 47467 event pairs, 744 based on Foata normal form. 4/7565 useless extension candidates. Maximal degree in co-relation 94092. Up to 6249 conditions per place. [2024-06-27 23:51:24,778 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 677 selfloop transitions, 262 changer transitions 0/955 dead transitions. [2024-06-27 23:51:24,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 955 transitions, 17521 flow [2024-06-27 23:51:24,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 23:51:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 23:51:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-27 23:51:24,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524793388429752 [2024-06-27 23:51:24,779 INFO L175 Difference]: Start difference. First operand has 519 places, 912 transitions, 15051 flow. Second operand 11 states and 219 transitions. [2024-06-27 23:51:24,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 955 transitions, 17521 flow Killed by 15