./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.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-cde23df-m [2024-06-14 12:59:20,652 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:59:20,684 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:59:20,687 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:59:20,688 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:59:20,701 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:59:20,702 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:59:20,702 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:59:20,702 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:59:20,702 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:59:20,703 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:59:20,703 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:59:20,703 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:59:20,704 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:59:20,704 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:59:20,704 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:59:20,704 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:59:20,705 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:59:20,705 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:59:20,705 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:59:20,705 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:59:20,706 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:59:20,706 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:59:20,706 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:59:20,706 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:59:20,707 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:59:20,707 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:59:20,707 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:59:20,707 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:59:20,707 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:59:20,708 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:59:20,708 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:59:20,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:59:20,708 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:59:20,709 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:59:20,717 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:59:20,717 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:59:20,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:59:20,717 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:59:20,717 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:59:20,717 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:59:20,718 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:59:20,718 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:59:20,719 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:59:20,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:59:20,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:59:20,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:59:20,946 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:59:20,946 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:59:20,948 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i [2024-06-14 12:59:22,009 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:59:22,249 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:59:22,250 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i [2024-06-14 12:59:22,269 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f483f50/77085a8912ef421dbd398a09e3f14f22/FLAG4558b345c [2024-06-14 12:59:22,284 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f483f50/77085a8912ef421dbd398a09e3f14f22 [2024-06-14 12:59:22,286 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:59:22,287 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:59:22,289 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-14 12:59:22,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:59:22,463 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:59:22,464 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:59:22,464 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:59:22,468 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:59:22,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:59:22" (1/2) ... [2024-06-14 12:59:22,470 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547e9d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:59:22, skipping insertion in model container [2024-06-14 12:59:22,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:59:22" (1/2) ... [2024-06-14 12:59:22,471 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e948ba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:59:22, skipping insertion in model container [2024-06-14 12:59:22,471 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:59:22" (2/2) ... [2024-06-14 12:59:22,471 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547e9d83 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:22, skipping insertion in model container [2024-06-14 12:59:22,472 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:59:22" (2/2) ... [2024-06-14 12:59:22,472 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:59:22,577 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:59:22,578 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 12:59:22,578 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 12:59:22,578 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 12:59:22,578 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:59:22,578 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-14 12:59:22,615 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:59:22,904 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:59:22,916 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:59:23,045 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:59:23,093 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:59:23,093 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23 WrapperNode [2024-06-14 12:59:23,093 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:59:23,094 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:59:23,094 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:59:23,094 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:59:23,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23" (1/1) ... [2024-06-14 12:59:23,129 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23" (1/1) ... [2024-06-14 12:59:23,162 INFO L138 Inliner]: procedures = 175, calls = 80, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 209 [2024-06-14 12:59:23,163 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:59:23,164 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:59:23,164 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:59:23,164 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:59:23,189 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23" (1/1) ... [2024-06-14 12:59:23,189 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23" (1/1) ... [2024-06-14 12:59:23,225 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23" (1/1) ... [2024-06-14 12:59:23,247 INFO L175 MemorySlicer]: Split 39 memory accesses to 2 slices as follows [2, 37]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-14 12:59:23,247 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23" (1/1) ... [2024-06-14 12:59:23,248 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23" (1/1) ... [2024-06-14 12:59:23,255 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23" (1/1) ... [2024-06-14 12:59:23,257 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23" (1/1) ... [2024-06-14 12:59:23,259 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23" (1/1) ... [2024-06-14 12:59:23,264 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23" (1/1) ... [2024-06-14 12:59:23,267 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:59:23,267 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:59:23,267 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:59:23,267 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:59:23,268 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23" (1/1) ... [2024-06-14 12:59:23,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:59:23,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:59:23,300 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) [2024-06-14 12:59:23,319 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 [2024-06-14 12:59:23,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 12:59:23,334 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 12:59:23,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 12:59:23,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 12:59:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:59:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:59:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:59:23,335 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:59:23,335 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:59:23,335 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:59:23,336 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:59:23,336 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:59:23,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:59:23,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 12:59:23,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:59:23,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:59:23,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:59:23,340 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:59:23,486 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:59:23,488 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:59:23,972 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:59:23,973 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:59:24,267 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:59:24,268 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:59:24,268 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:59:24 BoogieIcfgContainer [2024-06-14 12:59:24,268 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:59:24,272 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:59:24,272 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:59:24,274 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:59:24,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:59:22" (1/4) ... [2024-06-14 12:59:24,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffa65de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:59:24, skipping insertion in model container [2024-06-14 12:59:24,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:59:22" (2/4) ... [2024-06-14 12:59:24,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffa65de and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:59:24, skipping insertion in model container [2024-06-14 12:59:24,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:59:23" (3/4) ... [2024-06-14 12:59:24,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffa65de and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:59:24, skipping insertion in model container [2024-06-14 12:59:24,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:59:24" (4/4) ... [2024-06-14 12:59:24,276 INFO L112 eAbstractionObserver]: Analyzing ICFG safe007_rmo.oepc_rmo.opt-thin001_rmo.oepc_rmo.opt.i [2024-06-14 12:59:24,291 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:59:24,291 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:59:24,291 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:59:24,342 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:59:24,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:59:24,397 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 12:59:24,397 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:59:24,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:59:24,399 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:59:24,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 12:59:24,408 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:59:24,412 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;@6ac2ae58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:59:24,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:59:24,417 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:59:24,417 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:59:24,417 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:59:24,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:24,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:59:24,418 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)] === [2024-06-14 12:59:24,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:24,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1665062108, now seen corresponding path program 1 times [2024-06-14 12:59:24,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:24,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152292850] [2024-06-14 12:59:24,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:24,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:26,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:26,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152292850] [2024-06-14 12:59:26,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152292850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:26,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:26,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:59:26,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649995133] [2024-06-14 12:59:26,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:26,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:59:26,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:26,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:59:26,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:59:26,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:59:26,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:26,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:26,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:59:26,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:26,723 INFO L124 PetriNetUnfolderBase]: 775/1251 cut-off events. [2024-06-14 12:59:26,723 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-14 12:59:26,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2508 conditions, 1251 events. 775/1251 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5985 event pairs, 503 based on Foata normal form. 1/1218 useless extension candidates. Maximal degree in co-relation 2493. Up to 1188 conditions per place. [2024-06-14 12:59:26,734 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-14 12:59:26,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-14 12:59:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:59:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:59:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-14 12:59:26,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 12:59:26,744 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-14 12:59:26,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-14 12:59:26,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:59:26,748 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 12:59:26,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 12:59:26,753 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 12:59:26,753 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 12:59:26,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:26,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:26,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:26,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:59:26,754 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)] === [2024-06-14 12:59:26,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:26,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1898142179, now seen corresponding path program 1 times [2024-06-14 12:59:26,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:26,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765988063] [2024-06-14 12:59:26,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:26,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:28,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:28,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765988063] [2024-06-14 12:59:28,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765988063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:28,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:28,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:59:28,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002463256] [2024-06-14 12:59:28,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:28,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:59:28,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:28,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:59:28,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:59:28,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 12:59:28,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:28,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:28,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 12:59:28,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:29,502 INFO L124 PetriNetUnfolderBase]: 769/1236 cut-off events. [2024-06-14 12:59:29,502 INFO L125 PetriNetUnfolderBase]: For 238/245 co-relation queries the response was YES. [2024-06-14 12:59:29,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2857 conditions, 1236 events. 769/1236 cut-off events. For 238/245 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5810 event pairs, 410 based on Foata normal form. 7/1239 useless extension candidates. Maximal degree in co-relation 2842. Up to 1160 conditions per place. [2024-06-14 12:59:29,509 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-14 12:59:29,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 260 flow [2024-06-14 12:59:29,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:59:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:59:29,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-14 12:59:29,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-06-14 12:59:29,511 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 94 transitions. [2024-06-14 12:59:29,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 260 flow [2024-06-14 12:59:29,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:59:29,513 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 12:59:29,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 12:59:29,514 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 12:59:29,514 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 12:59:29,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:29,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:29,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:29,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:59:29,515 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)] === [2024-06-14 12:59:29,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1287133704, now seen corresponding path program 1 times [2024-06-14 12:59:29,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:29,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006463789] [2024-06-14 12:59:29,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:29,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:31,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:31,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006463789] [2024-06-14 12:59:31,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006463789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:31,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:31,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:59:31,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639355758] [2024-06-14 12:59:31,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:31,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:59:31,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:31,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:59:31,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:59:31,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:59:31,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:31,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:31,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:59:31,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:32,510 INFO L124 PetriNetUnfolderBase]: 968/1530 cut-off events. [2024-06-14 12:59:32,511 INFO L125 PetriNetUnfolderBase]: For 806/814 co-relation queries the response was YES. [2024-06-14 12:59:32,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3940 conditions, 1530 events. 968/1530 cut-off events. For 806/814 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7147 event pairs, 400 based on Foata normal form. 9/1536 useless extension candidates. Maximal degree in co-relation 3923. Up to 1433 conditions per place. [2024-06-14 12:59:32,519 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-14 12:59:32,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 385 flow [2024-06-14 12:59:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:59:32,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:59:32,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-14 12:59:32,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5209302325581395 [2024-06-14 12:59:32,523 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 112 transitions. [2024-06-14 12:59:32,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 385 flow [2024-06-14 12:59:32,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 364 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:59:32,525 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 210 flow [2024-06-14 12:59:32,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-06-14 12:59:32,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-14 12:59:32,526 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 210 flow [2024-06-14 12:59:32,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:32,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:32,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:32,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:59:32,527 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)] === [2024-06-14 12:59:32,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:32,527 INFO L85 PathProgramCache]: Analyzing trace with hash 15121239, now seen corresponding path program 1 times [2024-06-14 12:59:32,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:32,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507944259] [2024-06-14 12:59:32,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:32,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:35,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:35,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507944259] [2024-06-14 12:59:35,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507944259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:35,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:35,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:59:35,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345094387] [2024-06-14 12:59:35,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:35,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:59:35,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:35,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:59:35,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:59:35,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:59:35,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:35,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:35,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:59:35,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:35,889 INFO L124 PetriNetUnfolderBase]: 959/1515 cut-off events. [2024-06-14 12:59:35,890 INFO L125 PetriNetUnfolderBase]: For 1380/1400 co-relation queries the response was YES. [2024-06-14 12:59:35,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4333 conditions, 1515 events. 959/1515 cut-off events. For 1380/1400 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7092 event pairs, 275 based on Foata normal form. 18/1530 useless extension candidates. Maximal degree in co-relation 4313. Up to 1380 conditions per place. [2024-06-14 12:59:35,898 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 65 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2024-06-14 12:59:35,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 448 flow [2024-06-14 12:59:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:59:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:59:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-14 12:59:35,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-14 12:59:35,901 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 210 flow. Second operand 6 states and 128 transitions. [2024-06-14 12:59:35,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 448 flow [2024-06-14 12:59:35,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 83 transitions, 444 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 12:59:35,903 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 245 flow [2024-06-14 12:59:35,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-14 12:59:35,904 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-14 12:59:35,904 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 245 flow [2024-06-14 12:59:35,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:35,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:35,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:35,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:59:35,905 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)] === [2024-06-14 12:59:35,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:35,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1692520703, now seen corresponding path program 1 times [2024-06-14 12:59:35,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:35,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359790356] [2024-06-14 12:59:35,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:35,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:37,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:37,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359790356] [2024-06-14 12:59:37,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359790356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:37,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:37,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:59:37,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618482537] [2024-06-14 12:59:37,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:37,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:59:37,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:37,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:59:37,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:59:37,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:59:37,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:37,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:37,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:59:37,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:38,660 INFO L124 PetriNetUnfolderBase]: 1104/1723 cut-off events. [2024-06-14 12:59:38,661 INFO L125 PetriNetUnfolderBase]: For 2401/2401 co-relation queries the response was YES. [2024-06-14 12:59:38,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5265 conditions, 1723 events. 1104/1723 cut-off events. For 2401/2401 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8072 event pairs, 439 based on Foata normal form. 2/1721 useless extension candidates. Maximal degree in co-relation 5242. Up to 1645 conditions per place. [2024-06-14 12:59:38,674 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 58 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-14 12:59:38,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 454 flow [2024-06-14 12:59:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:59:38,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:59:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 12:59:38,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 12:59:38,678 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 245 flow. Second operand 5 states and 91 transitions. [2024-06-14 12:59:38,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 454 flow [2024-06-14 12:59:38,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 421 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 12:59:38,689 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 291 flow [2024-06-14 12:59:38,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-14 12:59:38,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2024-06-14 12:59:38,692 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 291 flow [2024-06-14 12:59:38,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:38,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:38,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:38,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:59:38,692 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)] === [2024-06-14 12:59:38,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:38,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1102881854, now seen corresponding path program 1 times [2024-06-14 12:59:38,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:38,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878571730] [2024-06-14 12:59:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:38,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:41,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:41,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:41,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878571730] [2024-06-14 12:59:41,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878571730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:41,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:41,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:59:41,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574397519] [2024-06-14 12:59:41,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:41,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:59:41,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:41,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:59:41,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:59:41,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:59:41,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 291 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 12:59:41,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:41,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:59:41,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:42,784 INFO L124 PetriNetUnfolderBase]: 1084/1711 cut-off events. [2024-06-14 12:59:42,785 INFO L125 PetriNetUnfolderBase]: For 3505/3541 co-relation queries the response was YES. [2024-06-14 12:59:42,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5726 conditions, 1711 events. 1084/1711 cut-off events. For 3505/3541 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8190 event pairs, 376 based on Foata normal form. 12/1713 useless extension candidates. Maximal degree in co-relation 5700. Up to 1536 conditions per place. [2024-06-14 12:59:42,795 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 24 changer transitions 0/97 dead transitions. [2024-06-14 12:59:42,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 97 transitions, 611 flow [2024-06-14 12:59:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:59:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:59:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 12:59:42,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-14 12:59:42,798 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 291 flow. Second operand 7 states and 141 transitions. [2024-06-14 12:59:42,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 97 transitions, 611 flow [2024-06-14 12:59:42,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 97 transitions, 607 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-14 12:59:42,802 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 389 flow [2024-06-14 12:59:42,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=389, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-06-14 12:59:42,804 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-14 12:59:42,805 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 389 flow [2024-06-14 12:59:42,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 12:59:42,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:42,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:42,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:59:42,805 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)] === [2024-06-14 12:59:42,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:42,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1273589120, now seen corresponding path program 1 times [2024-06-14 12:59:42,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:42,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117871496] [2024-06-14 12:59:42,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:42,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:45,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:45,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117871496] [2024-06-14 12:59:45,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117871496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:45,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:45,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:59:45,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256217771] [2024-06-14 12:59:45,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:45,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:59:45,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:45,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:59:45,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:59:45,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:59:45,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 389 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:45,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:45,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:59:45,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:46,807 INFO L124 PetriNetUnfolderBase]: 1148/1794 cut-off events. [2024-06-14 12:59:46,807 INFO L125 PetriNetUnfolderBase]: For 4819/4819 co-relation queries the response was YES. [2024-06-14 12:59:46,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6400 conditions, 1794 events. 1148/1794 cut-off events. For 4819/4819 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8453 event pairs, 404 based on Foata normal form. 2/1790 useless extension candidates. Maximal degree in co-relation 6371. Up to 1638 conditions per place. [2024-06-14 12:59:46,818 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 82 selfloop transitions, 20 changer transitions 0/107 dead transitions. [2024-06-14 12:59:46,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 107 transitions, 765 flow [2024-06-14 12:59:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:59:46,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:59:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:59:46,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 12:59:46,820 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 389 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:59:46,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 107 transitions, 765 flow [2024-06-14 12:59:46,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 107 transitions, 726 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:59:46,826 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 491 flow [2024-06-14 12:59:46,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=491, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-06-14 12:59:46,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-14 12:59:46,827 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 491 flow [2024-06-14 12:59:46,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:46,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:46,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:46,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:59:46,828 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)] === [2024-06-14 12:59:46,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:46,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1102886504, now seen corresponding path program 2 times [2024-06-14 12:59:46,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:46,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572985328] [2024-06-14 12:59:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:46,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:49,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:49,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572985328] [2024-06-14 12:59:49,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572985328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:49,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:49,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:59:49,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233775069] [2024-06-14 12:59:49,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:49,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:59:49,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:49,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:59:49,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:59:49,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:59:49,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 491 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 12:59:49,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:49,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:59:49,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:50,815 INFO L124 PetriNetUnfolderBase]: 1101/1755 cut-off events. [2024-06-14 12:59:50,815 INFO L125 PetriNetUnfolderBase]: For 6624/6759 co-relation queries the response was YES. [2024-06-14 12:59:50,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6805 conditions, 1755 events. 1101/1755 cut-off events. For 6624/6759 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8576 event pairs, 346 based on Foata normal form. 16/1732 useless extension candidates. Maximal degree in co-relation 6772. Up to 1576 conditions per place. [2024-06-14 12:59:50,829 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 71 selfloop transitions, 27 changer transitions 0/109 dead transitions. [2024-06-14 12:59:50,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 109 transitions, 804 flow [2024-06-14 12:59:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:59:50,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:59:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 12:59:50,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-14 12:59:50,832 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 491 flow. Second operand 7 states and 134 transitions. [2024-06-14 12:59:50,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 109 transitions, 804 flow [2024-06-14 12:59:50,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 774 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:59:50,838 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 579 flow [2024-06-14 12:59:50,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=579, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-14 12:59:50,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-14 12:59:50,840 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 579 flow [2024-06-14 12:59:50,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 12:59:50,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:50,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:50,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:59:50,841 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)] === [2024-06-14 12:59:50,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:50,841 INFO L85 PathProgramCache]: Analyzing trace with hash -51636154, now seen corresponding path program 3 times [2024-06-14 12:59:50,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:50,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335408382] [2024-06-14 12:59:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:50,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:53,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:53,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335408382] [2024-06-14 12:59:53,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335408382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:53,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:53,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:59:53,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960110743] [2024-06-14 12:59:53,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:53,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:59:53,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:53,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:59:53,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:59:53,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 12:59:53,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 579 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 12:59:53,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:53,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 12:59:53,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:54,492 INFO L124 PetriNetUnfolderBase]: 1089/1735 cut-off events. [2024-06-14 12:59:54,492 INFO L125 PetriNetUnfolderBase]: For 7685/7784 co-relation queries the response was YES. [2024-06-14 12:59:54,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6914 conditions, 1735 events. 1089/1735 cut-off events. For 7685/7784 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8410 event pairs, 346 based on Foata normal form. 16/1716 useless extension candidates. Maximal degree in co-relation 6880. Up to 1526 conditions per place. [2024-06-14 12:59:54,503 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 31 changer transitions 0/108 dead transitions. [2024-06-14 12:59:54,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 108 transitions, 839 flow [2024-06-14 12:59:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:59:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:59:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-14 12:59:54,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-14 12:59:54,505 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 579 flow. Second operand 6 states and 122 transitions. [2024-06-14 12:59:54,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 108 transitions, 839 flow [2024-06-14 12:59:54,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 108 transitions, 764 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 12:59:54,517 INFO L231 Difference]: Finished difference. Result has 77 places, 81 transitions, 585 flow [2024-06-14 12:59:54,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=585, PETRI_PLACES=77, PETRI_TRANSITIONS=81} [2024-06-14 12:59:54,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-14 12:59:54,519 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 81 transitions, 585 flow [2024-06-14 12:59:54,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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) [2024-06-14 12:59:54,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:54,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:54,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:59:54,519 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)] === [2024-06-14 12:59:54,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:54,520 INFO L85 PathProgramCache]: Analyzing trace with hash -51398818, now seen corresponding path program 2 times [2024-06-14 12:59:54,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:54,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964571185] [2024-06-14 12:59:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:54,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:56,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:56,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964571185] [2024-06-14 12:59:56,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964571185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:56,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:56,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:59:56,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863285185] [2024-06-14 12:59:56,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:56,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:59:56,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:56,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:59:56,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:59:56,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:59:56,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 81 transitions, 585 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:56,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:56,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:59:56,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:57,801 INFO L124 PetriNetUnfolderBase]: 1176/1852 cut-off events. [2024-06-14 12:59:57,801 INFO L125 PetriNetUnfolderBase]: For 9112/9136 co-relation queries the response was YES. [2024-06-14 12:59:57,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7476 conditions, 1852 events. 1176/1852 cut-off events. For 9112/9136 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8891 event pairs, 417 based on Foata normal form. 19/1863 useless extension candidates. Maximal degree in co-relation 7441. Up to 1674 conditions per place. [2024-06-14 12:59:57,812 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 80 selfloop transitions, 23 changer transitions 0/108 dead transitions. [2024-06-14 12:59:57,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 108 transitions, 913 flow [2024-06-14 12:59:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:59:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:59:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:59:57,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 12:59:57,814 INFO L175 Difference]: Start difference. First operand has 77 places, 81 transitions, 585 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:59:57,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 108 transitions, 913 flow [2024-06-14 12:59:57,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 108 transitions, 841 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:59:57,822 INFO L231 Difference]: Finished difference. Result has 79 places, 86 transitions, 614 flow [2024-06-14 12:59:57,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=614, PETRI_PLACES=79, PETRI_TRANSITIONS=86} [2024-06-14 12:59:57,823 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-14 12:59:57,823 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 86 transitions, 614 flow [2024-06-14 12:59:57,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:57,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:57,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:57,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:59:57,824 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)] === [2024-06-14 12:59:57,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:57,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2079211104, now seen corresponding path program 3 times [2024-06-14 12:59:57,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:57,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282496826] [2024-06-14 12:59:57,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:57,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:00,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:00,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282496826] [2024-06-14 13:00:00,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282496826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:00,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:00,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:00,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598726380] [2024-06-14 13:00:00,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:00,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:00,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:00,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:00,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:00,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:00:00,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 86 transitions, 614 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:00,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:00,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:00:00,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:01,273 INFO L124 PetriNetUnfolderBase]: 1171/1840 cut-off events. [2024-06-14 13:00:01,273 INFO L125 PetriNetUnfolderBase]: For 8461/8461 co-relation queries the response was YES. [2024-06-14 13:00:01,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7459 conditions, 1840 events. 1171/1840 cut-off events. For 8461/8461 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8787 event pairs, 403 based on Foata normal form. 2/1836 useless extension candidates. Maximal degree in co-relation 7422. Up to 1669 conditions per place. [2024-06-14 13:00:01,287 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 81 selfloop transitions, 24 changer transitions 0/110 dead transitions. [2024-06-14 13:00:01,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 110 transitions, 885 flow [2024-06-14 13:00:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:00:01,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:00:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 13:00:01,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 13:00:01,289 INFO L175 Difference]: Start difference. First operand has 79 places, 86 transitions, 614 flow. Second operand 6 states and 114 transitions. [2024-06-14 13:00:01,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 110 transitions, 885 flow [2024-06-14 13:00:01,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 857 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 13:00:01,302 INFO L231 Difference]: Finished difference. Result has 83 places, 86 transitions, 646 flow [2024-06-14 13:00:01,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=646, PETRI_PLACES=83, PETRI_TRANSITIONS=86} [2024-06-14 13:00:01,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-14 13:00:01,303 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 86 transitions, 646 flow [2024-06-14 13:00:01,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:01,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:01,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:01,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:00:01,304 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)] === [2024-06-14 13:00:01,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:01,304 INFO L85 PathProgramCache]: Analyzing trace with hash -51389890, now seen corresponding path program 1 times [2024-06-14 13:00:01,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:01,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734608973] [2024-06-14 13:00:01,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:01,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:03,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:03,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734608973] [2024-06-14 13:00:03,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734608973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:03,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:03,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:00:03,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920307845] [2024-06-14 13:00:03,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:03,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:00:03,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:03,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:00:03,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:00:03,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:00:03,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 86 transitions, 646 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:03,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:03,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:00:03,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:04,481 INFO L124 PetriNetUnfolderBase]: 1163/1827 cut-off events. [2024-06-14 13:00:04,481 INFO L125 PetriNetUnfolderBase]: For 10002/10005 co-relation queries the response was YES. [2024-06-14 13:00:04,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7571 conditions, 1827 events. 1163/1827 cut-off events. For 10002/10005 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8696 event pairs, 379 based on Foata normal form. 6/1829 useless extension candidates. Maximal degree in co-relation 7532. Up to 1709 conditions per place. [2024-06-14 13:00:04,492 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 93 selfloop transitions, 11 changer transitions 0/109 dead transitions. [2024-06-14 13:00:04,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 109 transitions, 917 flow [2024-06-14 13:00:04,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:00:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:00:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:00:04,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:00:04,495 INFO L175 Difference]: Start difference. First operand has 83 places, 86 transitions, 646 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:00:04,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 109 transitions, 917 flow [2024-06-14 13:00:04,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 109 transitions, 870 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:00:04,505 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 642 flow [2024-06-14 13:00:04,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=642, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2024-06-14 13:00:04,505 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-14 13:00:04,505 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 642 flow [2024-06-14 13:00:04,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:04,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:04,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:04,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:00:04,506 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)] === [2024-06-14 13:00:04,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:04,506 INFO L85 PathProgramCache]: Analyzing trace with hash -173974137, now seen corresponding path program 1 times [2024-06-14 13:00:04,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:04,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302472439] [2024-06-14 13:00:04,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:04,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:07,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:07,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302472439] [2024-06-14 13:00:07,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302472439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:07,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:07,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:07,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998567478] [2024-06-14 13:00:07,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:07,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:07,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:07,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:07,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:07,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:00:07,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 642 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:07,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:07,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:00:07,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:08,811 INFO L124 PetriNetUnfolderBase]: 1176/1851 cut-off events. [2024-06-14 13:00:08,812 INFO L125 PetriNetUnfolderBase]: For 10083/10083 co-relation queries the response was YES. [2024-06-14 13:00:08,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7722 conditions, 1851 events. 1176/1851 cut-off events. For 10083/10083 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8784 event pairs, 375 based on Foata normal form. 2/1847 useless extension candidates. Maximal degree in co-relation 7683. Up to 1576 conditions per place. [2024-06-14 13:00:08,819 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 103 selfloop transitions, 35 changer transitions 0/143 dead transitions. [2024-06-14 13:00:08,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 143 transitions, 1158 flow [2024-06-14 13:00:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:08,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:00:08,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 13:00:08,830 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 642 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:00:08,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 143 transitions, 1158 flow [2024-06-14 13:00:08,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 143 transitions, 1133 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 13:00:08,841 INFO L231 Difference]: Finished difference. Result has 90 places, 101 transitions, 817 flow [2024-06-14 13:00:08,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=817, PETRI_PLACES=90, PETRI_TRANSITIONS=101} [2024-06-14 13:00:08,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-14 13:00:08,843 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 101 transitions, 817 flow [2024-06-14 13:00:08,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:08,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:08,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:08,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:00:08,844 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)] === [2024-06-14 13:00:08,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:08,844 INFO L85 PathProgramCache]: Analyzing trace with hash -170255067, now seen corresponding path program 2 times [2024-06-14 13:00:08,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:08,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2419888] [2024-06-14 13:00:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:08,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:11,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:11,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2419888] [2024-06-14 13:00:11,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2419888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:11,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:11,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:11,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138103967] [2024-06-14 13:00:11,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:11,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:11,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:11,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:11,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:11,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:00:11,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 101 transitions, 817 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:11,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:11,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:00:11,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:12,947 INFO L124 PetriNetUnfolderBase]: 1207/1908 cut-off events. [2024-06-14 13:00:12,947 INFO L125 PetriNetUnfolderBase]: For 12542/12542 co-relation queries the response was YES. [2024-06-14 13:00:12,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8544 conditions, 1908 events. 1207/1908 cut-off events. For 12542/12542 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9194 event pairs, 375 based on Foata normal form. 2/1904 useless extension candidates. Maximal degree in co-relation 8502. Up to 1686 conditions per place. [2024-06-14 13:00:12,967 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 108 selfloop transitions, 31 changer transitions 0/144 dead transitions. [2024-06-14 13:00:12,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 144 transitions, 1289 flow [2024-06-14 13:00:12,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:00:12,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-14 13:00:12,969 INFO L175 Difference]: Start difference. First operand has 90 places, 101 transitions, 817 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:00:12,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 144 transitions, 1289 flow [2024-06-14 13:00:12,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 144 transitions, 1235 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:12,984 INFO L231 Difference]: Finished difference. Result has 96 places, 108 transitions, 909 flow [2024-06-14 13:00:12,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=909, PETRI_PLACES=96, PETRI_TRANSITIONS=108} [2024-06-14 13:00:12,985 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-14 13:00:12,985 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 108 transitions, 909 flow [2024-06-14 13:00:12,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:12,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:12,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:12,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:00:12,986 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:12,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash -170249487, now seen corresponding path program 3 times [2024-06-14 13:00:12,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:12,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392981116] [2024-06-14 13:00:12,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:12,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:15,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:15,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392981116] [2024-06-14 13:00:15,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392981116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:15,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:15,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:15,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296727238] [2024-06-14 13:00:15,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:15,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:15,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:15,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:15,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:15,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:00:15,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 108 transitions, 909 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:15,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:15,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:00:15,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:17,263 INFO L124 PetriNetUnfolderBase]: 1202/1901 cut-off events. [2024-06-14 13:00:17,263 INFO L125 PetriNetUnfolderBase]: For 14119/14119 co-relation queries the response was YES. [2024-06-14 13:00:17,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8766 conditions, 1901 events. 1202/1901 cut-off events. For 14119/14119 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9145 event pairs, 375 based on Foata normal form. 2/1897 useless extension candidates. Maximal degree in co-relation 8721. Up to 1681 conditions per place. [2024-06-14 13:00:17,289 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 115 selfloop transitions, 33 changer transitions 0/153 dead transitions. [2024-06-14 13:00:17,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 153 transitions, 1324 flow [2024-06-14 13:00:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:00:17,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:00:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-14 13:00:17,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-14 13:00:17,292 INFO L175 Difference]: Start difference. First operand has 96 places, 108 transitions, 909 flow. Second operand 10 states and 178 transitions. [2024-06-14 13:00:17,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 153 transitions, 1324 flow [2024-06-14 13:00:17,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 153 transitions, 1280 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:00:17,309 INFO L231 Difference]: Finished difference. Result has 102 places, 109 transitions, 949 flow [2024-06-14 13:00:17,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=949, PETRI_PLACES=102, PETRI_TRANSITIONS=109} [2024-06-14 13:00:17,311 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-14 13:00:17,311 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 109 transitions, 949 flow [2024-06-14 13:00:17,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:17,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:17,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:17,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:00:17,312 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)] === [2024-06-14 13:00:17,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:17,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1600713517, now seen corresponding path program 4 times [2024-06-14 13:00:17,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:17,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005013465] [2024-06-14 13:00:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:17,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:20,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:20,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005013465] [2024-06-14 13:00:20,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005013465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:20,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:20,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:20,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844179010] [2024-06-14 13:00:20,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:20,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:20,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:20,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:20,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:20,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:00:20,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 109 transitions, 949 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:20,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:20,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:00:20,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:21,959 INFO L124 PetriNetUnfolderBase]: 1233/1958 cut-off events. [2024-06-14 13:00:21,959 INFO L125 PetriNetUnfolderBase]: For 16217/16217 co-relation queries the response was YES. [2024-06-14 13:00:21,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9297 conditions, 1958 events. 1233/1958 cut-off events. For 16217/16217 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9490 event pairs, 375 based on Foata normal form. 2/1954 useless extension candidates. Maximal degree in co-relation 9250. Up to 1659 conditions per place. [2024-06-14 13:00:21,979 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 112 selfloop transitions, 46 changer transitions 0/163 dead transitions. [2024-06-14 13:00:21,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 163 transitions, 1549 flow [2024-06-14 13:00:21,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:00:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:00:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 13:00:21,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 13:00:21,983 INFO L175 Difference]: Start difference. First operand has 102 places, 109 transitions, 949 flow. Second operand 9 states and 172 transitions. [2024-06-14 13:00:21,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 163 transitions, 1549 flow [2024-06-14 13:00:21,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 163 transitions, 1481 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 13:00:21,997 INFO L231 Difference]: Finished difference. Result has 104 places, 116 transitions, 1066 flow [2024-06-14 13:00:21,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1066, PETRI_PLACES=104, PETRI_TRANSITIONS=116} [2024-06-14 13:00:21,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-14 13:00:21,998 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 116 transitions, 1066 flow [2024-06-14 13:00:21,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:21,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:21,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:21,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:00:21,999 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)] === [2024-06-14 13:00:21,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:21,999 INFO L85 PathProgramCache]: Analyzing trace with hash -31038873, now seen corresponding path program 5 times [2024-06-14 13:00:21,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:21,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652910907] [2024-06-14 13:00:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:22,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:25,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:25,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652910907] [2024-06-14 13:00:25,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652910907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:25,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:25,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:25,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381512691] [2024-06-14 13:00:25,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:25,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:25,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:25,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:25,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:25,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:00:25,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 116 transitions, 1066 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:25,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:25,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:00:25,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:26,899 INFO L124 PetriNetUnfolderBase]: 1228/1951 cut-off events. [2024-06-14 13:00:26,899 INFO L125 PetriNetUnfolderBase]: For 18313/18313 co-relation queries the response was YES. [2024-06-14 13:00:26,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9548 conditions, 1951 events. 1228/1951 cut-off events. For 18313/18313 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9488 event pairs, 375 based on Foata normal form. 2/1947 useless extension candidates. Maximal degree in co-relation 9499. Up to 1654 conditions per place. [2024-06-14 13:00:26,911 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 102 selfloop transitions, 44 changer transitions 0/151 dead transitions. [2024-06-14 13:00:26,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 1501 flow [2024-06-14 13:00:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:26,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 13:00:26,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 13:00:26,913 INFO L175 Difference]: Start difference. First operand has 104 places, 116 transitions, 1066 flow. Second operand 7 states and 138 transitions. [2024-06-14 13:00:26,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 1501 flow [2024-06-14 13:00:26,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 151 transitions, 1385 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:00:26,930 INFO L231 Difference]: Finished difference. Result has 104 places, 116 transitions, 1054 flow [2024-06-14 13:00:26,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1054, PETRI_PLACES=104, PETRI_TRANSITIONS=116} [2024-06-14 13:00:26,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-14 13:00:26,931 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 116 transitions, 1054 flow [2024-06-14 13:00:26,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:26,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:26,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:26,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:00:26,931 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)] === [2024-06-14 13:00:26,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:26,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1593361867, now seen corresponding path program 6 times [2024-06-14 13:00:26,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:26,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24488868] [2024-06-14 13:00:26,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:26,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:29,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:29,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24488868] [2024-06-14 13:00:29,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24488868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:29,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:29,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:29,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770630981] [2024-06-14 13:00:29,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:29,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:29,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:29,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:29,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:29,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:00:29,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 116 transitions, 1054 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:29,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:29,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:00:29,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:31,019 INFO L124 PetriNetUnfolderBase]: 1223/1949 cut-off events. [2024-06-14 13:00:31,019 INFO L125 PetriNetUnfolderBase]: For 18795/18826 co-relation queries the response was YES. [2024-06-14 13:00:31,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9453 conditions, 1949 events. 1223/1949 cut-off events. For 18795/18826 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9532 event pairs, 389 based on Foata normal form. 24/1965 useless extension candidates. Maximal degree in co-relation 9404. Up to 1649 conditions per place. [2024-06-14 13:00:31,031 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 105 selfloop transitions, 46 changer transitions 0/156 dead transitions. [2024-06-14 13:00:31,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 156 transitions, 1465 flow [2024-06-14 13:00:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:00:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:00:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:00:31,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:00:31,033 INFO L175 Difference]: Start difference. First operand has 104 places, 116 transitions, 1054 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:00:31,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 156 transitions, 1465 flow [2024-06-14 13:00:31,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 156 transitions, 1361 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:00:31,052 INFO L231 Difference]: Finished difference. Result has 106 places, 117 transitions, 1062 flow [2024-06-14 13:00:31,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1062, PETRI_PLACES=106, PETRI_TRANSITIONS=117} [2024-06-14 13:00:31,052 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-14 13:00:31,052 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 117 transitions, 1062 flow [2024-06-14 13:00:31,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:31,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:31,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:31,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:00:31,053 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)] === [2024-06-14 13:00:31,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:31,053 INFO L85 PathProgramCache]: Analyzing trace with hash 343165527, now seen corresponding path program 1 times [2024-06-14 13:00:31,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:31,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793350469] [2024-06-14 13:00:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:31,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:33,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:33,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793350469] [2024-06-14 13:00:33,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793350469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:33,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:33,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:33,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153296107] [2024-06-14 13:00:33,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:33,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:33,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:33,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:33,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:33,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:00:33,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 117 transitions, 1062 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:00:33,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:33,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:00:33,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:34,459 INFO L124 PetriNetUnfolderBase]: 1445/2323 cut-off events. [2024-06-14 13:00:34,459 INFO L125 PetriNetUnfolderBase]: For 23374/23404 co-relation queries the response was YES. [2024-06-14 13:00:34,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11735 conditions, 2323 events. 1445/2323 cut-off events. For 23374/23404 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12045 event pairs, 339 based on Foata normal form. 16/2276 useless extension candidates. Maximal degree in co-relation 11686. Up to 1779 conditions per place. [2024-06-14 13:00:34,472 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 111 selfloop transitions, 92 changer transitions 0/226 dead transitions. [2024-06-14 13:00:34,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 226 transitions, 2292 flow [2024-06-14 13:00:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:00:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:00:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-14 13:00:34,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-14 13:00:34,474 INFO L175 Difference]: Start difference. First operand has 106 places, 117 transitions, 1062 flow. Second operand 9 states and 181 transitions. [2024-06-14 13:00:34,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 226 transitions, 2292 flow [2024-06-14 13:00:34,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 226 transitions, 2156 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:00:34,494 INFO L231 Difference]: Finished difference. Result has 111 places, 174 transitions, 1801 flow [2024-06-14 13:00:34,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1801, PETRI_PLACES=111, PETRI_TRANSITIONS=174} [2024-06-14 13:00:34,494 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 67 predicate places. [2024-06-14 13:00:34,494 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 174 transitions, 1801 flow [2024-06-14 13:00:34,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:00:34,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:34,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:34,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:00:34,495 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)] === [2024-06-14 13:00:34,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:34,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1662841943, now seen corresponding path program 2 times [2024-06-14 13:00:34,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:34,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126119904] [2024-06-14 13:00:34,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:34,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:37,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:37,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126119904] [2024-06-14 13:00:37,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126119904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:37,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:37,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:37,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503553196] [2024-06-14 13:00:37,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:37,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:37,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:37,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:37,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:38,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:00:38,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 174 transitions, 1801 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:00:38,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:38,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:00:38,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:39,107 INFO L124 PetriNetUnfolderBase]: 1457/2345 cut-off events. [2024-06-14 13:00:39,107 INFO L125 PetriNetUnfolderBase]: For 26941/26990 co-relation queries the response was YES. [2024-06-14 13:00:39,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12457 conditions, 2345 events. 1457/2345 cut-off events. For 26941/26990 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12219 event pairs, 228 based on Foata normal form. 30/2310 useless extension candidates. Maximal degree in co-relation 12404. Up to 1651 conditions per place. [2024-06-14 13:00:39,121 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 94 selfloop transitions, 102 changer transitions 0/219 dead transitions. [2024-06-14 13:00:39,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 219 transitions, 2419 flow [2024-06-14 13:00:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:39,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 13:00:39,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-14 13:00:39,123 INFO L175 Difference]: Start difference. First operand has 111 places, 174 transitions, 1801 flow. Second operand 8 states and 159 transitions. [2024-06-14 13:00:39,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 219 transitions, 2419 flow [2024-06-14 13:00:39,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 219 transitions, 2388 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 13:00:39,153 INFO L231 Difference]: Finished difference. Result has 117 places, 178 transitions, 2036 flow [2024-06-14 13:00:39,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2036, PETRI_PLACES=117, PETRI_TRANSITIONS=178} [2024-06-14 13:00:39,154 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-14 13:00:39,154 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 178 transitions, 2036 flow [2024-06-14 13:00:39,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:00:39,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:39,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:39,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:00:39,155 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)] === [2024-06-14 13:00:39,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1383435235, now seen corresponding path program 3 times [2024-06-14 13:00:39,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:39,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577844902] [2024-06-14 13:00:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:39,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:42,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:42,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577844902] [2024-06-14 13:00:42,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577844902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:42,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:42,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:42,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596538169] [2024-06-14 13:00:42,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:42,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:42,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:42,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:42,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:42,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:00:42,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 178 transitions, 2036 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:00:42,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:42,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:00:42,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:43,531 INFO L124 PetriNetUnfolderBase]: 1491/2406 cut-off events. [2024-06-14 13:00:43,532 INFO L125 PetriNetUnfolderBase]: For 32427/32483 co-relation queries the response was YES. [2024-06-14 13:00:43,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13405 conditions, 2406 events. 1491/2406 cut-off events. For 32427/32483 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12604 event pairs, 317 based on Foata normal form. 24/2364 useless extension candidates. Maximal degree in co-relation 13350. Up to 1907 conditions per place. [2024-06-14 13:00:43,549 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 102 selfloop transitions, 96 changer transitions 0/221 dead transitions. [2024-06-14 13:00:43,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 221 transitions, 2604 flow [2024-06-14 13:00:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:00:43,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-14 13:00:43,551 INFO L175 Difference]: Start difference. First operand has 117 places, 178 transitions, 2036 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:00:43,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 221 transitions, 2604 flow [2024-06-14 13:00:43,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 221 transitions, 2462 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:00:43,583 INFO L231 Difference]: Finished difference. Result has 120 places, 182 transitions, 2162 flow [2024-06-14 13:00:43,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2162, PETRI_PLACES=120, PETRI_TRANSITIONS=182} [2024-06-14 13:00:43,583 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-14 13:00:43,583 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 182 transitions, 2162 flow [2024-06-14 13:00:43,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:00:43,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:43,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:43,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:00:43,584 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)] === [2024-06-14 13:00:43,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:43,584 INFO L85 PathProgramCache]: Analyzing trace with hash -982943033, now seen corresponding path program 4 times [2024-06-14 13:00:43,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:43,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702590610] [2024-06-14 13:00:43,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:43,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:46,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:46,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702590610] [2024-06-14 13:00:46,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702590610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:46,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:46,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:46,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609511689] [2024-06-14 13:00:46,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:46,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:46,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:46,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:46,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:46,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:00:46,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 182 transitions, 2162 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:00:46,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:46,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:00:46,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:47,868 INFO L124 PetriNetUnfolderBase]: 1531/2470 cut-off events. [2024-06-14 13:00:47,868 INFO L125 PetriNetUnfolderBase]: For 32189/32245 co-relation queries the response was YES. [2024-06-14 13:00:47,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13864 conditions, 2470 events. 1531/2470 cut-off events. For 32189/32245 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13014 event pairs, 315 based on Foata normal form. 24/2427 useless extension candidates. Maximal degree in co-relation 13808. Up to 2080 conditions per place. [2024-06-14 13:00:47,884 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 143 selfloop transitions, 57 changer transitions 0/223 dead transitions. [2024-06-14 13:00:47,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 223 transitions, 2736 flow [2024-06-14 13:00:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:00:47,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 13:00:47,886 INFO L175 Difference]: Start difference. First operand has 120 places, 182 transitions, 2162 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:00:47,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 223 transitions, 2736 flow [2024-06-14 13:00:47,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 223 transitions, 2530 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:00:47,946 INFO L231 Difference]: Finished difference. Result has 122 places, 186 transitions, 2150 flow [2024-06-14 13:00:47,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1956, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2150, PETRI_PLACES=122, PETRI_TRANSITIONS=186} [2024-06-14 13:00:47,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-14 13:00:47,946 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 186 transitions, 2150 flow [2024-06-14 13:00:47,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:00:47,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:47,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:47,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:00:47,947 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:00:47,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:47,947 INFO L85 PathProgramCache]: Analyzing trace with hash -982758335, now seen corresponding path program 1 times [2024-06-14 13:00:47,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:47,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838511001] [2024-06-14 13:00:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:47,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:50,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:50,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838511001] [2024-06-14 13:00:50,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838511001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:50,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:50,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:50,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692990947] [2024-06-14 13:00:50,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:50,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:50,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:50,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:50,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:50,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:00:50,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 186 transitions, 2150 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:50,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:50,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:00:50,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:52,228 INFO L124 PetriNetUnfolderBase]: 1661/2640 cut-off events. [2024-06-14 13:00:52,228 INFO L125 PetriNetUnfolderBase]: For 31221/31229 co-relation queries the response was YES. [2024-06-14 13:00:52,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14476 conditions, 2640 events. 1661/2640 cut-off events. For 31221/31229 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13684 event pairs, 374 based on Foata normal form. 12/2646 useless extension candidates. Maximal degree in co-relation 14419. Up to 2360 conditions per place. [2024-06-14 13:00:52,248 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 190 selfloop transitions, 30 changer transitions 0/225 dead transitions. [2024-06-14 13:00:52,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 225 transitions, 2719 flow [2024-06-14 13:00:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:52,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:00:52,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:00:52,250 INFO L175 Difference]: Start difference. First operand has 122 places, 186 transitions, 2150 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:00:52,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 225 transitions, 2719 flow [2024-06-14 13:00:52,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 225 transitions, 2583 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:00:52,290 INFO L231 Difference]: Finished difference. Result has 124 places, 188 transitions, 2099 flow [2024-06-14 13:00:52,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2099, PETRI_PLACES=124, PETRI_TRANSITIONS=188} [2024-06-14 13:00:52,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-14 13:00:52,292 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 188 transitions, 2099 flow [2024-06-14 13:00:52,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:52,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:52,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:52,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:00:52,293 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)] === [2024-06-14 13:00:52,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:52,294 INFO L85 PathProgramCache]: Analyzing trace with hash -660500589, now seen corresponding path program 5 times [2024-06-14 13:00:52,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:52,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851862008] [2024-06-14 13:00:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:52,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:55,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:55,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851862008] [2024-06-14 13:00:55,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851862008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:55,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:55,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:55,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091775702] [2024-06-14 13:00:55,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:55,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:55,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:55,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:55,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:55,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:00:55,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 188 transitions, 2099 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:00:55,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:55,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:00:55,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:56,618 INFO L124 PetriNetUnfolderBase]: 1530/2471 cut-off events. [2024-06-14 13:00:56,618 INFO L125 PetriNetUnfolderBase]: For 34509/34569 co-relation queries the response was YES. [2024-06-14 13:00:56,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13780 conditions, 2471 events. 1530/2471 cut-off events. For 34509/34569 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13035 event pairs, 212 based on Foata normal form. 39/2444 useless extension candidates. Maximal degree in co-relation 13722. Up to 1879 conditions per place. [2024-06-14 13:00:56,632 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 109 selfloop transitions, 89 changer transitions 0/222 dead transitions. [2024-06-14 13:00:56,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 222 transitions, 2599 flow [2024-06-14 13:00:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 13:00:56,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 13:00:56,633 INFO L175 Difference]: Start difference. First operand has 124 places, 188 transitions, 2099 flow. Second operand 7 states and 140 transitions. [2024-06-14 13:00:56,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 222 transitions, 2599 flow [2024-06-14 13:00:56,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 222 transitions, 2512 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:00:56,663 INFO L231 Difference]: Finished difference. Result has 125 places, 188 transitions, 2224 flow [2024-06-14 13:00:56,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2224, PETRI_PLACES=125, PETRI_TRANSITIONS=188} [2024-06-14 13:00:56,664 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-14 13:00:56,664 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 188 transitions, 2224 flow [2024-06-14 13:00:56,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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) [2024-06-14 13:00:56,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:56,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:56,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:00:56,664 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)] === [2024-06-14 13:00:56,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1917496991, now seen corresponding path program 2 times [2024-06-14 13:00:56,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:56,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537859516] [2024-06-14 13:00:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:56,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:59,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:59,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537859516] [2024-06-14 13:00:59,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537859516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:59,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:59,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:59,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837326406] [2024-06-14 13:00:59,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:59,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:59,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:59,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:59,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:59,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:00:59,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 188 transitions, 2224 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:00:59,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:59,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:00:59,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:00,722 INFO L124 PetriNetUnfolderBase]: 1658/2640 cut-off events. [2024-06-14 13:01:00,722 INFO L125 PetriNetUnfolderBase]: For 35637/35647 co-relation queries the response was YES. [2024-06-14 13:01:00,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14756 conditions, 2640 events. 1658/2640 cut-off events. For 35637/35647 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13750 event pairs, 372 based on Foata normal form. 14/2648 useless extension candidates. Maximal degree in co-relation 14697. Up to 2337 conditions per place. [2024-06-14 13:01:00,736 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 183 selfloop transitions, 33 changer transitions 0/221 dead transitions. [2024-06-14 13:01:00,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 221 transitions, 2769 flow [2024-06-14 13:01:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 13:01:00,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 13:01:00,738 INFO L175 Difference]: Start difference. First operand has 125 places, 188 transitions, 2224 flow. Second operand 7 states and 130 transitions. [2024-06-14 13:01:00,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 221 transitions, 2769 flow [2024-06-14 13:01:00,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 221 transitions, 2569 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:01:00,775 INFO L231 Difference]: Finished difference. Result has 126 places, 190 transitions, 2122 flow [2024-06-14 13:01:00,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2122, PETRI_PLACES=126, PETRI_TRANSITIONS=190} [2024-06-14 13:01:00,775 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-14 13:01:00,775 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 190 transitions, 2122 flow [2024-06-14 13:01:00,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:00,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:00,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:00,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:01:00,776 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)] === [2024-06-14 13:01:00,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2145398141, now seen corresponding path program 3 times [2024-06-14 13:01:00,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:00,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587365748] [2024-06-14 13:01:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:00,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:03,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:03,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587365748] [2024-06-14 13:01:03,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587365748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:03,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:03,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:03,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542250055] [2024-06-14 13:01:03,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:03,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:03,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:03,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:03,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:03,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:01:03,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 190 transitions, 2122 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:03,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:03,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:01:03,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:04,433 INFO L124 PetriNetUnfolderBase]: 1678/2675 cut-off events. [2024-06-14 13:01:04,433 INFO L125 PetriNetUnfolderBase]: For 35502/35548 co-relation queries the response was YES. [2024-06-14 13:01:04,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14807 conditions, 2675 events. 1678/2675 cut-off events. For 35502/35548 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13974 event pairs, 390 based on Foata normal form. 36/2699 useless extension candidates. Maximal degree in co-relation 14747. Up to 2391 conditions per place. [2024-06-14 13:01:04,451 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 185 selfloop transitions, 30 changer transitions 0/220 dead transitions. [2024-06-14 13:01:04,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 220 transitions, 2661 flow [2024-06-14 13:01:04,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:04,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:01:04,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 13:01:04,453 INFO L175 Difference]: Start difference. First operand has 126 places, 190 transitions, 2122 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:01:04,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 220 transitions, 2661 flow [2024-06-14 13:01:04,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 220 transitions, 2579 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:04,494 INFO L231 Difference]: Finished difference. Result has 128 places, 192 transitions, 2133 flow [2024-06-14 13:01:04,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2133, PETRI_PLACES=128, PETRI_TRANSITIONS=192} [2024-06-14 13:01:04,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-14 13:01:04,495 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 192 transitions, 2133 flow [2024-06-14 13:01:04,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:04,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:04,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:04,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:01:04,496 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)] === [2024-06-14 13:01:04,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:04,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2140998275, now seen corresponding path program 4 times [2024-06-14 13:01:04,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:04,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93598553] [2024-06-14 13:01:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:04,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:07,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:07,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93598553] [2024-06-14 13:01:07,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93598553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:07,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:07,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:07,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587529282] [2024-06-14 13:01:07,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:07,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:07,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:07,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:07,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:01:07,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 192 transitions, 2133 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:07,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:07,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:01:07,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:08,096 INFO L124 PetriNetUnfolderBase]: 1670/2663 cut-off events. [2024-06-14 13:01:08,096 INFO L125 PetriNetUnfolderBase]: For 34664/34710 co-relation queries the response was YES. [2024-06-14 13:01:08,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14632 conditions, 2663 events. 1670/2663 cut-off events. For 34664/34710 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13915 event pairs, 352 based on Foata normal form. 36/2687 useless extension candidates. Maximal degree in co-relation 14571. Up to 2285 conditions per place. [2024-06-14 13:01:08,111 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 181 selfloop transitions, 37 changer transitions 0/223 dead transitions. [2024-06-14 13:01:08,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 223 transitions, 2680 flow [2024-06-14 13:01:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:01:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:01:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:01:08,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:01:08,113 INFO L175 Difference]: Start difference. First operand has 128 places, 192 transitions, 2133 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:01:08,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 223 transitions, 2680 flow [2024-06-14 13:01:08,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 223 transitions, 2609 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:08,148 INFO L231 Difference]: Finished difference. Result has 130 places, 194 transitions, 2169 flow [2024-06-14 13:01:08,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2169, PETRI_PLACES=130, PETRI_TRANSITIONS=194} [2024-06-14 13:01:08,149 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-14 13:01:08,149 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 194 transitions, 2169 flow [2024-06-14 13:01:08,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:08,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:08,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:08,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:01:08,150 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:08,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:08,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1921795946, now seen corresponding path program 1 times [2024-06-14 13:01:08,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:08,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577012174] [2024-06-14 13:01:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:08,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:09,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:09,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577012174] [2024-06-14 13:01:09,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577012174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:09,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:09,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:01:09,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715284110] [2024-06-14 13:01:09,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:09,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:01:09,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:09,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:01:09,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:01:09,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:01:09,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 194 transitions, 2169 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:09,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:09,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:01:09,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:10,743 INFO L124 PetriNetUnfolderBase]: 1536/2471 cut-off events. [2024-06-14 13:01:10,743 INFO L125 PetriNetUnfolderBase]: For 36340/36439 co-relation queries the response was YES. [2024-06-14 13:01:10,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14000 conditions, 2471 events. 1536/2471 cut-off events. For 36340/36439 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13050 event pairs, 393 based on Foata normal form. 86/2527 useless extension candidates. Maximal degree in co-relation 13938. Up to 2278 conditions per place. [2024-06-14 13:01:10,757 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 182 selfloop transitions, 13 changer transitions 0/208 dead transitions. [2024-06-14 13:01:10,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 208 transitions, 2609 flow [2024-06-14 13:01:10,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:01:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:01:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 13:01:10,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 13:01:10,759 INFO L175 Difference]: Start difference. First operand has 130 places, 194 transitions, 2169 flow. Second operand 5 states and 91 transitions. [2024-06-14 13:01:10,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 208 transitions, 2609 flow [2024-06-14 13:01:10,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 208 transitions, 2520 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:10,797 INFO L231 Difference]: Finished difference. Result has 130 places, 197 transitions, 2139 flow [2024-06-14 13:01:10,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2139, PETRI_PLACES=130, PETRI_TRANSITIONS=197} [2024-06-14 13:01:10,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-14 13:01:10,797 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 197 transitions, 2139 flow [2024-06-14 13:01:10,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:10,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:10,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:10,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:01:10,798 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)] === [2024-06-14 13:01:10,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:10,798 INFO L85 PathProgramCache]: Analyzing trace with hash -151744758, now seen corresponding path program 1 times [2024-06-14 13:01:10,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:10,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677540772] [2024-06-14 13:01:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:10,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:14,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:14,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677540772] [2024-06-14 13:01:14,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677540772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:14,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:14,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:14,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466341184] [2024-06-14 13:01:14,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:14,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:14,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:14,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:14,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:14,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:01:14,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 197 transitions, 2139 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:14,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:14,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:01:14,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:15,325 INFO L124 PetriNetUnfolderBase]: 1774/2856 cut-off events. [2024-06-14 13:01:15,325 INFO L125 PetriNetUnfolderBase]: For 42605/42615 co-relation queries the response was YES. [2024-06-14 13:01:15,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15838 conditions, 2856 events. 1774/2856 cut-off events. For 42605/42615 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15330 event pairs, 241 based on Foata normal form. 22/2872 useless extension candidates. Maximal degree in co-relation 15775. Up to 1727 conditions per place. [2024-06-14 13:01:15,344 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 193 selfloop transitions, 65 changer transitions 0/263 dead transitions. [2024-06-14 13:01:15,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 263 transitions, 3034 flow [2024-06-14 13:01:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 13:01:15,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-14 13:01:15,345 INFO L175 Difference]: Start difference. First operand has 130 places, 197 transitions, 2139 flow. Second operand 9 states and 175 transitions. [2024-06-14 13:01:15,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 263 transitions, 3034 flow [2024-06-14 13:01:15,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 263 transitions, 2999 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:01:15,391 INFO L231 Difference]: Finished difference. Result has 138 places, 204 transitions, 2360 flow [2024-06-14 13:01:15,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2104, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2360, PETRI_PLACES=138, PETRI_TRANSITIONS=204} [2024-06-14 13:01:15,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-14 13:01:15,392 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 204 transitions, 2360 flow [2024-06-14 13:01:15,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:15,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:15,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:15,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:01:15,393 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)] === [2024-06-14 13:01:15,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:15,393 INFO L85 PathProgramCache]: Analyzing trace with hash -63031128, now seen corresponding path program 2 times [2024-06-14 13:01:15,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:15,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124488475] [2024-06-14 13:01:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:15,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:18,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:18,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124488475] [2024-06-14 13:01:18,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124488475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:18,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:18,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:18,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781158189] [2024-06-14 13:01:18,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:18,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:18,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:18,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:18,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:19,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:01:19,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 204 transitions, 2360 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:19,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:19,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:01:19,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:20,654 INFO L124 PetriNetUnfolderBase]: 1842/2983 cut-off events. [2024-06-14 13:01:20,654 INFO L125 PetriNetUnfolderBase]: For 49102/49112 co-relation queries the response was YES. [2024-06-14 13:01:20,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16955 conditions, 2983 events. 1842/2983 cut-off events. For 49102/49112 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16342 event pairs, 405 based on Foata normal form. 26/3003 useless extension candidates. Maximal degree in co-relation 16889. Up to 2373 conditions per place. [2024-06-14 13:01:20,671 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 185 selfloop transitions, 63 changer transitions 0/253 dead transitions. [2024-06-14 13:01:20,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 253 transitions, 3028 flow [2024-06-14 13:01:20,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 13:01:20,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-14 13:01:20,672 INFO L175 Difference]: Start difference. First operand has 138 places, 204 transitions, 2360 flow. Second operand 9 states and 170 transitions. [2024-06-14 13:01:20,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 253 transitions, 3028 flow [2024-06-14 13:01:20,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 253 transitions, 2937 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:01:20,735 INFO L231 Difference]: Finished difference. Result has 143 places, 205 transitions, 2421 flow [2024-06-14 13:01:20,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2421, PETRI_PLACES=143, PETRI_TRANSITIONS=205} [2024-06-14 13:01:20,735 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 99 predicate places. [2024-06-14 13:01:20,736 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 205 transitions, 2421 flow [2024-06-14 13:01:20,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:20,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:20,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:20,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:01:20,736 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:01:20,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:20,737 INFO L85 PathProgramCache]: Analyzing trace with hash -149870808, now seen corresponding path program 3 times [2024-06-14 13:01:20,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:20,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437795648] [2024-06-14 13:01:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:20,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:24,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:24,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437795648] [2024-06-14 13:01:24,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437795648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:24,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:24,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:24,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662115204] [2024-06-14 13:01:24,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:24,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:24,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:24,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:24,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:24,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:01:24,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 205 transitions, 2421 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:24,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:24,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:01:24,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:25,971 INFO L124 PetriNetUnfolderBase]: 1890/3067 cut-off events. [2024-06-14 13:01:25,971 INFO L125 PetriNetUnfolderBase]: For 52335/52345 co-relation queries the response was YES. [2024-06-14 13:01:25,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17684 conditions, 3067 events. 1890/3067 cut-off events. For 52335/52345 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17006 event pairs, 395 based on Foata normal form. 22/3083 useless extension candidates. Maximal degree in co-relation 17616. Up to 2311 conditions per place. [2024-06-14 13:01:25,997 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 191 selfloop transitions, 64 changer transitions 0/260 dead transitions. [2024-06-14 13:01:25,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 260 transitions, 3151 flow [2024-06-14 13:01:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 13:01:25,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 13:01:25,999 INFO L175 Difference]: Start difference. First operand has 143 places, 205 transitions, 2421 flow. Second operand 9 states and 173 transitions. [2024-06-14 13:01:25,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 260 transitions, 3151 flow [2024-06-14 13:01:26,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 260 transitions, 3020 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:01:26,068 INFO L231 Difference]: Finished difference. Result has 146 places, 209 transitions, 2493 flow [2024-06-14 13:01:26,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2493, PETRI_PLACES=146, PETRI_TRANSITIONS=209} [2024-06-14 13:01:26,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-14 13:01:26,069 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 209 transitions, 2493 flow [2024-06-14 13:01:26,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:26,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:26,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:26,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:01:26,069 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)] === [2024-06-14 13:01:26,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:26,070 INFO L85 PathProgramCache]: Analyzing trace with hash -400951024, now seen corresponding path program 4 times [2024-06-14 13:01:26,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:26,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179356752] [2024-06-14 13:01:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:26,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:29,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:29,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179356752] [2024-06-14 13:01:29,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179356752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:29,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:29,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:29,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767706484] [2024-06-14 13:01:29,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:29,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:29,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:29,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:29,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:01:29,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 209 transitions, 2493 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:29,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:29,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:01:29,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:30,938 INFO L124 PetriNetUnfolderBase]: 1958/3183 cut-off events. [2024-06-14 13:01:30,938 INFO L125 PetriNetUnfolderBase]: For 57922/57930 co-relation queries the response was YES. [2024-06-14 13:01:30,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18403 conditions, 3183 events. 1958/3183 cut-off events. For 57922/57930 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17878 event pairs, 434 based on Foata normal form. 24/3201 useless extension candidates. Maximal degree in co-relation 18333. Up to 2732 conditions per place. [2024-06-14 13:01:30,961 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 219 selfloop transitions, 42 changer transitions 0/266 dead transitions. [2024-06-14 13:01:30,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 266 transitions, 3217 flow [2024-06-14 13:01:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:01:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:01:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-14 13:01:30,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4143763213530655 [2024-06-14 13:01:30,963 INFO L175 Difference]: Start difference. First operand has 146 places, 209 transitions, 2493 flow. Second operand 11 states and 196 transitions. [2024-06-14 13:01:30,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 266 transitions, 3217 flow [2024-06-14 13:01:31,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 266 transitions, 3126 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:31,050 INFO L231 Difference]: Finished difference. Result has 152 places, 210 transitions, 2516 flow [2024-06-14 13:01:31,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2516, PETRI_PLACES=152, PETRI_TRANSITIONS=210} [2024-06-14 13:01:31,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-14 13:01:31,051 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 210 transitions, 2516 flow [2024-06-14 13:01:31,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:31,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:31,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:31,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:01:31,051 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)] === [2024-06-14 13:01:31,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:31,051 INFO L85 PathProgramCache]: Analyzing trace with hash -406313404, now seen corresponding path program 5 times [2024-06-14 13:01:31,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:31,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162263612] [2024-06-14 13:01:31,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:31,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:34,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:34,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162263612] [2024-06-14 13:01:34,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162263612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:34,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:34,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:34,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294620839] [2024-06-14 13:01:34,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:34,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:34,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:34,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:34,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:34,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:01:34,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 210 transitions, 2516 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:34,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:34,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:01:34,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:35,964 INFO L124 PetriNetUnfolderBase]: 2026/3311 cut-off events. [2024-06-14 13:01:35,964 INFO L125 PetriNetUnfolderBase]: For 61841/61849 co-relation queries the response was YES. [2024-06-14 13:01:35,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19168 conditions, 3311 events. 2026/3311 cut-off events. For 61841/61849 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18931 event pairs, 452 based on Foata normal form. 24/3329 useless extension candidates. Maximal degree in co-relation 19096. Up to 2848 conditions per place. [2024-06-14 13:01:35,989 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 212 selfloop transitions, 40 changer transitions 0/257 dead transitions. [2024-06-14 13:01:35,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 257 transitions, 3196 flow [2024-06-14 13:01:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:35,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:35,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:01:35,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 13:01:35,991 INFO L175 Difference]: Start difference. First operand has 152 places, 210 transitions, 2516 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:01:35,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 257 transitions, 3196 flow [2024-06-14 13:01:36,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 257 transitions, 3103 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:01:36,072 INFO L231 Difference]: Finished difference. Result has 152 places, 211 transitions, 2535 flow [2024-06-14 13:01:36,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2535, PETRI_PLACES=152, PETRI_TRANSITIONS=211} [2024-06-14 13:01:36,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-14 13:01:36,073 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 211 transitions, 2535 flow [2024-06-14 13:01:36,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:36,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:36,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:36,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:01:36,073 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)] === [2024-06-14 13:01:36,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:36,074 INFO L85 PathProgramCache]: Analyzing trace with hash -406461274, now seen corresponding path program 6 times [2024-06-14 13:01:36,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:36,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710729404] [2024-06-14 13:01:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:36,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:36,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:39,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:39,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710729404] [2024-06-14 13:01:39,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710729404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:39,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:39,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:39,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576627867] [2024-06-14 13:01:39,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:39,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:39,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:39,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:39,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:39,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:01:39,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 211 transitions, 2535 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:39,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:39,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:01:39,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:40,886 INFO L124 PetriNetUnfolderBase]: 2074/3395 cut-off events. [2024-06-14 13:01:40,887 INFO L125 PetriNetUnfolderBase]: For 65070/65078 co-relation queries the response was YES. [2024-06-14 13:01:40,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19642 conditions, 3395 events. 2074/3395 cut-off events. For 65070/65078 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19603 event pairs, 442 based on Foata normal form. 20/3409 useless extension candidates. Maximal degree in co-relation 19569. Up to 2676 conditions per place. [2024-06-14 13:01:40,912 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 217 selfloop transitions, 42 changer transitions 0/264 dead transitions. [2024-06-14 13:01:40,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 264 transitions, 3287 flow [2024-06-14 13:01:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:01:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:01:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:01:40,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:01:40,914 INFO L175 Difference]: Start difference. First operand has 152 places, 211 transitions, 2535 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:01:40,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 264 transitions, 3287 flow [2024-06-14 13:01:41,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 264 transitions, 3196 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:01:41,020 INFO L231 Difference]: Finished difference. Result has 155 places, 215 transitions, 2622 flow [2024-06-14 13:01:41,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2622, PETRI_PLACES=155, PETRI_TRANSITIONS=215} [2024-06-14 13:01:41,020 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-14 13:01:41,020 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 215 transitions, 2622 flow [2024-06-14 13:01:41,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:41,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:41,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:41,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:01:41,021 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)] === [2024-06-14 13:01:41,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:41,021 INFO L85 PathProgramCache]: Analyzing trace with hash -400735822, now seen corresponding path program 1 times [2024-06-14 13:01:41,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:41,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465276044] [2024-06-14 13:01:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:41,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:44,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:44,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465276044] [2024-06-14 13:01:44,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465276044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:44,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:44,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:44,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199997985] [2024-06-14 13:01:44,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:44,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:44,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:44,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:44,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:44,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:01:44,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 215 transitions, 2622 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:44,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:44,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:01:44,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:46,081 INFO L124 PetriNetUnfolderBase]: 2122/3491 cut-off events. [2024-06-14 13:01:46,081 INFO L125 PetriNetUnfolderBase]: For 69701/69709 co-relation queries the response was YES. [2024-06-14 13:01:46,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20169 conditions, 3491 events. 2122/3491 cut-off events. For 69701/69709 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 20428 event pairs, 462 based on Foata normal form. 20/3505 useless extension candidates. Maximal degree in co-relation 20094. Up to 2798 conditions per place. [2024-06-14 13:01:46,103 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 224 selfloop transitions, 46 changer transitions 0/275 dead transitions. [2024-06-14 13:01:46,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 275 transitions, 3371 flow [2024-06-14 13:01:46,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:01:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:01:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-14 13:01:46,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:01:46,105 INFO L175 Difference]: Start difference. First operand has 155 places, 215 transitions, 2622 flow. Second operand 11 states and 198 transitions. [2024-06-14 13:01:46,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 275 transitions, 3371 flow [2024-06-14 13:01:46,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 275 transitions, 3299 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:01:46,200 INFO L231 Difference]: Finished difference. Result has 161 places, 216 transitions, 2666 flow [2024-06-14 13:01:46,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2666, PETRI_PLACES=161, PETRI_TRANSITIONS=216} [2024-06-14 13:01:46,200 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-14 13:01:46,201 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 216 transitions, 2666 flow [2024-06-14 13:01:46,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:46,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:46,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:46,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:01:46,201 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)] === [2024-06-14 13:01:46,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2082619220, now seen corresponding path program 7 times [2024-06-14 13:01:46,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:46,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317182047] [2024-06-14 13:01:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:46,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:49,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:49,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317182047] [2024-06-14 13:01:49,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317182047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:49,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:49,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:49,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777865883] [2024-06-14 13:01:49,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:49,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:49,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:49,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:49,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:49,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:01:49,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 216 transitions, 2666 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:49,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:49,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:01:49,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:50,892 INFO L124 PetriNetUnfolderBase]: 2190/3610 cut-off events. [2024-06-14 13:01:50,892 INFO L125 PetriNetUnfolderBase]: For 76610/76656 co-relation queries the response was YES. [2024-06-14 13:01:50,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20961 conditions, 3610 events. 2190/3610 cut-off events. For 76610/76656 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21381 event pairs, 502 based on Foata normal form. 48/3646 useless extension candidates. Maximal degree in co-relation 20884. Up to 3029 conditions per place. [2024-06-14 13:01:50,920 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 200 selfloop transitions, 62 changer transitions 0/267 dead transitions. [2024-06-14 13:01:50,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 267 transitions, 3378 flow [2024-06-14 13:01:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:01:50,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:01:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 13:01:50,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:01:50,922 INFO L175 Difference]: Start difference. First operand has 161 places, 216 transitions, 2666 flow. Second operand 10 states and 180 transitions. [2024-06-14 13:01:50,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 267 transitions, 3378 flow [2024-06-14 13:01:51,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 267 transitions, 3276 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:01:51,019 INFO L231 Difference]: Finished difference. Result has 162 places, 217 transitions, 2724 flow [2024-06-14 13:01:51,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2564, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2724, PETRI_PLACES=162, PETRI_TRANSITIONS=217} [2024-06-14 13:01:51,020 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-14 13:01:51,020 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 217 transitions, 2724 flow [2024-06-14 13:01:51,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:51,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:51,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:51,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:01:51,020 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)] === [2024-06-14 13:01:51,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:51,021 INFO L85 PathProgramCache]: Analyzing trace with hash -692711514, now seen corresponding path program 8 times [2024-06-14 13:01:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:51,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528068004] [2024-06-14 13:01:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:54,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:54,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528068004] [2024-06-14 13:01:54,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528068004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:54,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:54,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:54,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812554343] [2024-06-14 13:01:54,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:54,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:54,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:54,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:54,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:54,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:01:54,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 217 transitions, 2724 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:54,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:54,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:01:54,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:56,121 INFO L124 PetriNetUnfolderBase]: 2258/3735 cut-off events. [2024-06-14 13:01:56,122 INFO L125 PetriNetUnfolderBase]: For 82298/82308 co-relation queries the response was YES. [2024-06-14 13:01:56,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21728 conditions, 3735 events. 2258/3735 cut-off events. For 82298/82308 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 22423 event pairs, 510 based on Foata normal form. 26/3755 useless extension candidates. Maximal degree in co-relation 21650. Up to 3033 conditions per place. [2024-06-14 13:01:56,157 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 196 selfloop transitions, 60 changer transitions 0/261 dead transitions. [2024-06-14 13:01:56,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 261 transitions, 3406 flow [2024-06-14 13:01:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:56,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:01:56,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 13:01:56,161 INFO L175 Difference]: Start difference. First operand has 162 places, 217 transitions, 2724 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:01:56,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 261 transitions, 3406 flow [2024-06-14 13:01:56,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 261 transitions, 3267 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:01:56,267 INFO L231 Difference]: Finished difference. Result has 162 places, 218 transitions, 2746 flow [2024-06-14 13:01:56,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2746, PETRI_PLACES=162, PETRI_TRANSITIONS=218} [2024-06-14 13:01:56,268 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-14 13:01:56,268 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 218 transitions, 2746 flow [2024-06-14 13:01:56,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:56,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:56,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:56,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:01:56,269 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)] === [2024-06-14 13:01:56,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:56,269 INFO L85 PathProgramCache]: Analyzing trace with hash -692859384, now seen corresponding path program 9 times [2024-06-14 13:01:56,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:56,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830823387] [2024-06-14 13:01:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:56,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:59,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:59,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830823387] [2024-06-14 13:01:59,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830823387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:59,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:59,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:01:59,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987801959] [2024-06-14 13:01:59,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:59,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:01:59,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:59,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:01:59,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:01:59,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:01:59,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 218 transitions, 2746 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:01:59,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:59,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:01:59,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:01,015 INFO L124 PetriNetUnfolderBase]: 2306/3819 cut-off events. [2024-06-14 13:02:01,016 INFO L125 PetriNetUnfolderBase]: For 85685/85695 co-relation queries the response was YES. [2024-06-14 13:02:01,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22214 conditions, 3819 events. 2306/3819 cut-off events. For 85685/85695 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23005 event pairs, 373 based on Foata normal form. 22/3835 useless extension candidates. Maximal degree in co-relation 22135. Up to 2393 conditions per place. [2024-06-14 13:02:01,049 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 66 changer transitions 0/269 dead transitions. [2024-06-14 13:02:01,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 269 transitions, 3599 flow [2024-06-14 13:02:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:01,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 13:02:01,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-14 13:02:01,051 INFO L175 Difference]: Start difference. First operand has 162 places, 218 transitions, 2746 flow. Second operand 8 states and 159 transitions. [2024-06-14 13:02:01,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 269 transitions, 3599 flow [2024-06-14 13:02:01,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 269 transitions, 3469 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:02:01,183 INFO L231 Difference]: Finished difference. Result has 165 places, 221 transitions, 2843 flow [2024-06-14 13:02:01,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2616, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2843, PETRI_PLACES=165, PETRI_TRANSITIONS=221} [2024-06-14 13:02:01,183 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-14 13:02:01,184 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 221 transitions, 2843 flow [2024-06-14 13:02:01,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:02:01,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:01,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:01,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:02:01,184 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:01,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:01,184 INFO L85 PathProgramCache]: Analyzing trace with hash 241825234, now seen corresponding path program 10 times [2024-06-14 13:02:01,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:01,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775892551] [2024-06-14 13:02:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:01,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:04,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:04,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775892551] [2024-06-14 13:02:04,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775892551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:04,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:04,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:04,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365403158] [2024-06-14 13:02:04,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:04,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:04,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:04,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:04,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:04,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:02:04,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 221 transitions, 2843 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:02:04,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:04,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:02:04,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:06,482 INFO L124 PetriNetUnfolderBase]: 2278/3775 cut-off events. [2024-06-14 13:02:06,483 INFO L125 PetriNetUnfolderBase]: For 85409/85419 co-relation queries the response was YES. [2024-06-14 13:02:06,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21869 conditions, 3775 events. 2278/3775 cut-off events. For 85409/85419 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22691 event pairs, 506 based on Foata normal form. 26/3795 useless extension candidates. Maximal degree in co-relation 21788. Up to 3073 conditions per place. [2024-06-14 13:02:06,514 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 206 selfloop transitions, 64 changer transitions 0/275 dead transitions. [2024-06-14 13:02:06,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 275 transitions, 3586 flow [2024-06-14 13:02:06,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:02:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:02:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 13:02:06,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-14 13:02:06,516 INFO L175 Difference]: Start difference. First operand has 165 places, 221 transitions, 2843 flow. Second operand 10 states and 186 transitions. [2024-06-14 13:02:06,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 275 transitions, 3586 flow [2024-06-14 13:02:06,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 275 transitions, 3358 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-14 13:02:06,665 INFO L231 Difference]: Finished difference. Result has 167 places, 222 transitions, 2789 flow [2024-06-14 13:02:06,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2629, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2789, PETRI_PLACES=167, PETRI_TRANSITIONS=222} [2024-06-14 13:02:06,665 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-14 13:02:06,665 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 222 transitions, 2789 flow [2024-06-14 13:02:06,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:02:06,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:06,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:06,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:02:06,666 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)] === [2024-06-14 13:02:06,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:06,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2082834422, now seen corresponding path program 2 times [2024-06-14 13:02:06,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:06,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298139503] [2024-06-14 13:02:06,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:06,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:09,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:09,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298139503] [2024-06-14 13:02:09,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298139503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:09,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:09,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:09,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140393167] [2024-06-14 13:02:09,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:09,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:09,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:09,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:09,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:09,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:02:09,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 222 transitions, 2789 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:02:09,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:09,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:02:09,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:11,552 INFO L124 PetriNetUnfolderBase]: 2326/3874 cut-off events. [2024-06-14 13:02:11,552 INFO L125 PetriNetUnfolderBase]: For 81073/81119 co-relation queries the response was YES. [2024-06-14 13:02:11,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21591 conditions, 3874 events. 2326/3874 cut-off events. For 81073/81119 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23558 event pairs, 516 based on Foata normal form. 44/3906 useless extension candidates. Maximal degree in co-relation 21511. Up to 3163 conditions per place. [2024-06-14 13:02:11,581 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 211 selfloop transitions, 65 changer transitions 0/281 dead transitions. [2024-06-14 13:02:11,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 281 transitions, 3546 flow [2024-06-14 13:02:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:02:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:02:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-14 13:02:11,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:02:11,582 INFO L175 Difference]: Start difference. First operand has 167 places, 222 transitions, 2789 flow. Second operand 11 states and 198 transitions. [2024-06-14 13:02:11,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 281 transitions, 3546 flow [2024-06-14 13:02:11,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 281 transitions, 3418 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:02:11,688 INFO L231 Difference]: Finished difference. Result has 170 places, 223 transitions, 2817 flow [2024-06-14 13:02:11,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2817, PETRI_PLACES=170, PETRI_TRANSITIONS=223} [2024-06-14 13:02:11,689 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-14 13:02:11,689 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 223 transitions, 2817 flow [2024-06-14 13:02:11,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:02:11,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:11,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:11,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:02:11,689 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)] === [2024-06-14 13:02:11,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:11,690 INFO L85 PathProgramCache]: Analyzing trace with hash -687133932, now seen corresponding path program 3 times [2024-06-14 13:02:11,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:11,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155576067] [2024-06-14 13:02:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:11,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:15,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:15,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155576067] [2024-06-14 13:02:15,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155576067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:15,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:15,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:15,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994384897] [2024-06-14 13:02:15,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:15,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:15,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:15,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:15,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:15,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:02:15,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 223 transitions, 2817 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:02:15,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:15,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:02:15,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:17,077 INFO L124 PetriNetUnfolderBase]: 2374/3967 cut-off events. [2024-06-14 13:02:17,078 INFO L125 PetriNetUnfolderBase]: For 85119/85129 co-relation queries the response was YES. [2024-06-14 13:02:17,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22062 conditions, 3967 events. 2374/3967 cut-off events. For 85119/85129 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24285 event pairs, 504 based on Foata normal form. 22/3983 useless extension candidates. Maximal degree in co-relation 21981. Up to 2805 conditions per place. [2024-06-14 13:02:17,110 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 203 selfloop transitions, 72 changer transitions 0/280 dead transitions. [2024-06-14 13:02:17,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 280 transitions, 3568 flow [2024-06-14 13:02:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:02:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:02:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-14 13:02:17,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-14 13:02:17,112 INFO L175 Difference]: Start difference. First operand has 170 places, 223 transitions, 2817 flow. Second operand 10 states and 188 transitions. [2024-06-14 13:02:17,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 280 transitions, 3568 flow [2024-06-14 13:02:17,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 280 transitions, 3426 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 13:02:17,221 INFO L231 Difference]: Finished difference. Result has 171 places, 224 transitions, 2849 flow [2024-06-14 13:02:17,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2675, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2849, PETRI_PLACES=171, PETRI_TRANSITIONS=224} [2024-06-14 13:02:17,222 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-14 13:02:17,222 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 224 transitions, 2849 flow [2024-06-14 13:02:17,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:02:17,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:17,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:17,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:02:17,222 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)] === [2024-06-14 13:02:17,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:17,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1946435594, now seen corresponding path program 4 times [2024-06-14 13:02:17,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:17,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863992835] [2024-06-14 13:02:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:17,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:20,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:20,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863992835] [2024-06-14 13:02:20,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863992835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:20,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:20,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:02:20,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790428753] [2024-06-14 13:02:20,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:20,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:02:20,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:20,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:02:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:02:20,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:02:20,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 224 transitions, 2849 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:02:20,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:20,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:02:20,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:21,797 INFO L124 PetriNetUnfolderBase]: 2354/3938 cut-off events. [2024-06-14 13:02:21,797 INFO L125 PetriNetUnfolderBase]: For 83930/83976 co-relation queries the response was YES. [2024-06-14 13:02:21,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21719 conditions, 3938 events. 2354/3938 cut-off events. For 83930/83976 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 24104 event pairs, 484 based on Foata normal form. 44/3970 useless extension candidates. Maximal degree in co-relation 21637. Up to 2421 conditions per place. [2024-06-14 13:02:21,825 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 196 selfloop transitions, 76 changer transitions 0/277 dead transitions. [2024-06-14 13:02:21,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 277 transitions, 3502 flow [2024-06-14 13:02:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:02:21,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:02:21,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 13:02:21,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 13:02:21,827 INFO L175 Difference]: Start difference. First operand has 171 places, 224 transitions, 2849 flow. Second operand 10 states and 182 transitions. [2024-06-14 13:02:21,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 277 transitions, 3502 flow [2024-06-14 13:02:21,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 277 transitions, 3344 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:02:21,931 INFO L231 Difference]: Finished difference. Result has 172 places, 223 transitions, 2781 flow [2024-06-14 13:02:21,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2625, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2781, PETRI_PLACES=172, PETRI_TRANSITIONS=223} [2024-06-14 13:02:21,932 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-14 13:02:21,932 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 223 transitions, 2781 flow [2024-06-14 13:02:21,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-14 13:02:21,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:21,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:21,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:02:21,932 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:21,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:21,932 INFO L85 PathProgramCache]: Analyzing trace with hash -594408107, now seen corresponding path program 1 times [2024-06-14 13:02:21,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:21,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79393258] [2024-06-14 13:02:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:21,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:24,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:24,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79393258] [2024-06-14 13:02:24,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79393258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:24,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:24,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:02:24,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050318272] [2024-06-14 13:02:24,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:24,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:02:24,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:24,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:02:24,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:02:24,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:02:24,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 223 transitions, 2781 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:24,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:24,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:02:24,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:26,147 INFO L124 PetriNetUnfolderBase]: 2312/3883 cut-off events. [2024-06-14 13:02:26,148 INFO L125 PetriNetUnfolderBase]: For 81030/81080 co-relation queries the response was YES. [2024-06-14 13:02:26,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21624 conditions, 3883 events. 2312/3883 cut-off events. For 81030/81080 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 24068 event pairs, 509 based on Foata normal form. 43/3894 useless extension candidates. Maximal degree in co-relation 21541. Up to 3490 conditions per place. [2024-06-14 13:02:26,173 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 195 selfloop transitions, 52 changer transitions 0/262 dead transitions. [2024-06-14 13:02:26,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 262 transitions, 3561 flow [2024-06-14 13:02:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:02:26,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:02:26,174 INFO L175 Difference]: Start difference. First operand has 172 places, 223 transitions, 2781 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:02:26,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 262 transitions, 3561 flow [2024-06-14 13:02:26,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 262 transitions, 3360 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 13:02:26,285 INFO L231 Difference]: Finished difference. Result has 171 places, 237 transitions, 2849 flow [2024-06-14 13:02:26,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2849, PETRI_PLACES=171, PETRI_TRANSITIONS=237} [2024-06-14 13:02:26,286 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-14 13:02:26,286 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 237 transitions, 2849 flow [2024-06-14 13:02:26,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:26,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:26,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:26,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:02:26,286 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:26,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:26,287 INFO L85 PathProgramCache]: Analyzing trace with hash 116662023, now seen corresponding path program 2 times [2024-06-14 13:02:26,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:26,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809035806] [2024-06-14 13:02:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:26,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:28,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:28,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809035806] [2024-06-14 13:02:28,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809035806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:28,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:28,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:02:28,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526726729] [2024-06-14 13:02:28,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:28,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:02:28,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:28,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:02:28,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:02:28,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:02:28,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 237 transitions, 2849 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:28,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:28,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:02:28,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:29,924 INFO L124 PetriNetUnfolderBase]: 2298/3862 cut-off events. [2024-06-14 13:02:29,924 INFO L125 PetriNetUnfolderBase]: For 82173/82242 co-relation queries the response was YES. [2024-06-14 13:02:29,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21057 conditions, 3862 events. 2298/3862 cut-off events. For 82173/82242 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 23931 event pairs, 522 based on Foata normal form. 53/3873 useless extension candidates. Maximal degree in co-relation 20974. Up to 3448 conditions per place. [2024-06-14 13:02:29,960 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 189 selfloop transitions, 52 changer transitions 0/256 dead transitions. [2024-06-14 13:02:29,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 256 transitions, 3481 flow [2024-06-14 13:02:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:02:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:02:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:02:29,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:02:29,961 INFO L175 Difference]: Start difference. First operand has 171 places, 237 transitions, 2849 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:02:29,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 256 transitions, 3481 flow [2024-06-14 13:02:30,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 256 transitions, 3426 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 13:02:30,095 INFO L231 Difference]: Finished difference. Result has 175 places, 240 transitions, 2944 flow [2024-06-14 13:02:30,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2794, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2944, PETRI_PLACES=175, PETRI_TRANSITIONS=240} [2024-06-14 13:02:30,096 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-14 13:02:30,096 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 240 transitions, 2944 flow [2024-06-14 13:02:30,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:30,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:30,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:30,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:02:30,096 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:30,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:30,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1069005823, now seen corresponding path program 3 times [2024-06-14 13:02:30,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:30,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814341415] [2024-06-14 13:02:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:30,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:32,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:32,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814341415] [2024-06-14 13:02:32,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814341415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:32,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:32,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:02:32,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638034214] [2024-06-14 13:02:32,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:32,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:02:32,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:32,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:02:32,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:02:32,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:02:32,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 240 transitions, 2944 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:32,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:32,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:02:32,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:33,692 INFO L124 PetriNetUnfolderBase]: 2287/3850 cut-off events. [2024-06-14 13:02:33,692 INFO L125 PetriNetUnfolderBase]: For 83073/83117 co-relation queries the response was YES. [2024-06-14 13:02:33,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21258 conditions, 3850 events. 2287/3850 cut-off events. For 83073/83117 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23892 event pairs, 508 based on Foata normal form. 37/3855 useless extension candidates. Maximal degree in co-relation 21173. Up to 3468 conditions per place. [2024-06-14 13:02:33,719 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 196 selfloop transitions, 50 changer transitions 0/261 dead transitions. [2024-06-14 13:02:33,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 261 transitions, 3500 flow [2024-06-14 13:02:33,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:02:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:02:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-14 13:02:33,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:02:33,721 INFO L175 Difference]: Start difference. First operand has 175 places, 240 transitions, 2944 flow. Second operand 6 states and 112 transitions. [2024-06-14 13:02:33,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 261 transitions, 3500 flow [2024-06-14 13:02:33,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 261 transitions, 3356 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 13:02:33,838 INFO L231 Difference]: Finished difference. Result has 177 places, 240 transitions, 2917 flow [2024-06-14 13:02:33,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2800, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2917, PETRI_PLACES=177, PETRI_TRANSITIONS=240} [2024-06-14 13:02:33,838 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 13:02:33,839 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 240 transitions, 2917 flow [2024-06-14 13:02:33,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:33,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:33,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:33,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:02:33,839 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:33,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:33,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1276005043, now seen corresponding path program 1 times [2024-06-14 13:02:33,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:33,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847937952] [2024-06-14 13:02:33,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:33,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:35,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:35,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847937952] [2024-06-14 13:02:35,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847937952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:35,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:35,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:02:35,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014927601] [2024-06-14 13:02:35,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:35,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:02:35,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:35,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:02:35,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:02:35,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:02:35,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 240 transitions, 2917 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:35,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:35,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:02:35,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:37,125 INFO L124 PetriNetUnfolderBase]: 2402/4009 cut-off events. [2024-06-14 13:02:37,125 INFO L125 PetriNetUnfolderBase]: For 85534/85539 co-relation queries the response was YES. [2024-06-14 13:02:37,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21971 conditions, 4009 events. 2402/4009 cut-off events. For 85534/85539 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24738 event pairs, 610 based on Foata normal form. 3/4008 useless extension candidates. Maximal degree in co-relation 21885. Up to 3751 conditions per place. [2024-06-14 13:02:37,154 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 238 selfloop transitions, 19 changer transitions 0/262 dead transitions. [2024-06-14 13:02:37,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 262 transitions, 3611 flow [2024-06-14 13:02:37,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:02:37,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:02:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 13:02:37,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:02:37,155 INFO L175 Difference]: Start difference. First operand has 177 places, 240 transitions, 2917 flow. Second operand 6 states and 104 transitions. [2024-06-14 13:02:37,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 262 transitions, 3611 flow [2024-06-14 13:02:37,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 262 transitions, 3498 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:02:37,292 INFO L231 Difference]: Finished difference. Result has 177 places, 246 transitions, 2920 flow [2024-06-14 13:02:37,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2806, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2920, PETRI_PLACES=177, PETRI_TRANSITIONS=246} [2024-06-14 13:02:37,293 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 13:02:37,293 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 246 transitions, 2920 flow [2024-06-14 13:02:37,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:37,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:37,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:37,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:02:37,293 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:37,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:37,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1244489203, now seen corresponding path program 2 times [2024-06-14 13:02:37,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:37,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337664882] [2024-06-14 13:02:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:37,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:39,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:39,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337664882] [2024-06-14 13:02:39,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337664882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:39,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:39,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:02:39,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369759196] [2024-06-14 13:02:39,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:39,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:02:39,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:39,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:02:39,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:02:39,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:02:39,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 246 transitions, 2920 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:39,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:39,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:02:39,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:40,622 INFO L124 PetriNetUnfolderBase]: 2399/4005 cut-off events. [2024-06-14 13:02:40,622 INFO L125 PetriNetUnfolderBase]: For 85384/85389 co-relation queries the response was YES. [2024-06-14 13:02:40,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22076 conditions, 4005 events. 2399/4005 cut-off events. For 85384/85389 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 24701 event pairs, 610 based on Foata normal form. 3/4004 useless extension candidates. Maximal degree in co-relation 21990. Up to 3751 conditions per place. [2024-06-14 13:02:40,656 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 239 selfloop transitions, 16 changer transitions 0/260 dead transitions. [2024-06-14 13:02:40,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 260 transitions, 3470 flow [2024-06-14 13:02:40,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:02:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:02:40,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 13:02:40,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 13:02:40,658 INFO L175 Difference]: Start difference. First operand has 177 places, 246 transitions, 2920 flow. Second operand 5 states and 91 transitions. [2024-06-14 13:02:40,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 260 transitions, 3470 flow [2024-06-14 13:02:40,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 260 transitions, 3415 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 13:02:40,781 INFO L231 Difference]: Finished difference. Result has 180 places, 246 transitions, 2907 flow [2024-06-14 13:02:40,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2907, PETRI_PLACES=180, PETRI_TRANSITIONS=246} [2024-06-14 13:02:40,781 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-14 13:02:40,781 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 246 transitions, 2907 flow [2024-06-14 13:02:40,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:40,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:40,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:40,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:02:40,782 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:40,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:40,782 INFO L85 PathProgramCache]: Analyzing trace with hash 116676903, now seen corresponding path program 1 times [2024-06-14 13:02:40,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:40,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64659049] [2024-06-14 13:02:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:40,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:43,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:43,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64659049] [2024-06-14 13:02:43,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64659049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:43,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:43,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:43,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124326040] [2024-06-14 13:02:43,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:43,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:43,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:43,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:43,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:43,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:02:43,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 246 transitions, 2907 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:43,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:43,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:02:43,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:44,657 INFO L124 PetriNetUnfolderBase]: 2275/3831 cut-off events. [2024-06-14 13:02:44,657 INFO L125 PetriNetUnfolderBase]: For 88702/88778 co-relation queries the response was YES. [2024-06-14 13:02:44,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21248 conditions, 3831 events. 2275/3831 cut-off events. For 88702/88778 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 23820 event pairs, 562 based on Foata normal form. 67/3866 useless extension candidates. Maximal degree in co-relation 21160. Up to 3533 conditions per place. [2024-06-14 13:02:44,691 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 231 selfloop transitions, 15 changer transitions 0/261 dead transitions. [2024-06-14 13:02:44,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 261 transitions, 3461 flow [2024-06-14 13:02:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:02:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:02:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 13:02:44,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-14 13:02:44,693 INFO L175 Difference]: Start difference. First operand has 180 places, 246 transitions, 2907 flow. Second operand 6 states and 103 transitions. [2024-06-14 13:02:44,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 261 transitions, 3461 flow [2024-06-14 13:02:44,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 261 transitions, 3429 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:02:44,875 INFO L231 Difference]: Finished difference. Result has 182 places, 248 transitions, 2942 flow [2024-06-14 13:02:44,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2875, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2942, PETRI_PLACES=182, PETRI_TRANSITIONS=248} [2024-06-14 13:02:44,876 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-14 13:02:44,876 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 248 transitions, 2942 flow [2024-06-14 13:02:44,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:44,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:44,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:44,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:02:44,877 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:44,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2104308312, now seen corresponding path program 1 times [2024-06-14 13:02:44,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:44,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530656157] [2024-06-14 13:02:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:44,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:47,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530656157] [2024-06-14 13:02:47,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530656157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:47,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:47,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:47,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128121185] [2024-06-14 13:02:47,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:47,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:47,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:47,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:47,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:47,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:02:47,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 248 transitions, 2942 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:47,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:47,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:02:47,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:49,381 INFO L124 PetriNetUnfolderBase]: 2425/4046 cut-off events. [2024-06-14 13:02:49,381 INFO L125 PetriNetUnfolderBase]: For 92168/92176 co-relation queries the response was YES. [2024-06-14 13:02:49,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22531 conditions, 4046 events. 2425/4046 cut-off events. For 92168/92176 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 24880 event pairs, 530 based on Foata normal form. 10/4053 useless extension candidates. Maximal degree in co-relation 22442. Up to 3681 conditions per place. [2024-06-14 13:02:49,412 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 254 selfloop transitions, 44 changer transitions 0/303 dead transitions. [2024-06-14 13:02:49,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 303 transitions, 3887 flow [2024-06-14 13:02:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:02:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:02:49,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:02:49,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-14 13:02:49,414 INFO L175 Difference]: Start difference. First operand has 182 places, 248 transitions, 2942 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:02:49,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 303 transitions, 3887 flow [2024-06-14 13:02:49,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 303 transitions, 3836 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:02:49,551 INFO L231 Difference]: Finished difference. Result has 190 places, 265 transitions, 3172 flow [2024-06-14 13:02:49,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2891, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3172, PETRI_PLACES=190, PETRI_TRANSITIONS=265} [2024-06-14 13:02:49,551 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-14 13:02:49,551 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 265 transitions, 3172 flow [2024-06-14 13:02:49,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:49,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:49,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:49,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:02:49,552 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)] === [2024-06-14 13:02:49,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:49,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2095042722, now seen corresponding path program 2 times [2024-06-14 13:02:49,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:49,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360913894] [2024-06-14 13:02:49,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:49,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:52,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:52,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360913894] [2024-06-14 13:02:52,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360913894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:52,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:52,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:52,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183203048] [2024-06-14 13:02:52,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:52,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:52,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:52,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:52,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:52,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:02:52,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 265 transitions, 3172 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:52,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:52,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:02:52,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:53,949 INFO L124 PetriNetUnfolderBase]: 2456/4091 cut-off events. [2024-06-14 13:02:53,949 INFO L125 PetriNetUnfolderBase]: For 99217/99219 co-relation queries the response was YES. [2024-06-14 13:02:53,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23435 conditions, 4091 events. 2456/4091 cut-off events. For 99217/99219 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25080 event pairs, 538 based on Foata normal form. 2/4090 useless extension candidates. Maximal degree in co-relation 23343. Up to 3710 conditions per place. [2024-06-14 13:02:53,990 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 250 selfloop transitions, 50 changer transitions 0/305 dead transitions. [2024-06-14 13:02:53,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 305 transitions, 4148 flow [2024-06-14 13:02:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:02:53,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:02:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:02:53,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-14 13:02:53,992 INFO L175 Difference]: Start difference. First operand has 190 places, 265 transitions, 3172 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:02:53,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 305 transitions, 4148 flow [2024-06-14 13:02:54,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 305 transitions, 4016 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 13:02:54,159 INFO L231 Difference]: Finished difference. Result has 195 places, 277 transitions, 3300 flow [2024-06-14 13:02:54,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3068, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3300, PETRI_PLACES=195, PETRI_TRANSITIONS=277} [2024-06-14 13:02:54,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-14 13:02:54,159 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 277 transitions, 3300 flow [2024-06-14 13:02:54,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:54,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:54,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:54,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:02:54,160 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:54,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:54,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2095053882, now seen corresponding path program 3 times [2024-06-14 13:02:54,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:54,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231907919] [2024-06-14 13:02:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:54,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:57,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:57,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231907919] [2024-06-14 13:02:57,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231907919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:57,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:57,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:57,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098615258] [2024-06-14 13:02:57,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:57,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:57,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:57,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:57,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:57,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:02:57,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 277 transitions, 3300 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:57,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:57,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:02:57,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:58,845 INFO L124 PetriNetUnfolderBase]: 2450/4079 cut-off events. [2024-06-14 13:02:58,845 INFO L125 PetriNetUnfolderBase]: For 101627/101629 co-relation queries the response was YES. [2024-06-14 13:02:58,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23399 conditions, 4079 events. 2450/4079 cut-off events. For 101627/101629 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24970 event pairs, 535 based on Foata normal form. 2/4078 useless extension candidates. Maximal degree in co-relation 23305. Up to 3705 conditions per place. [2024-06-14 13:02:58,876 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 250 selfloop transitions, 52 changer transitions 0/307 dead transitions. [2024-06-14 13:02:58,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 307 transitions, 4070 flow [2024-06-14 13:02:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:02:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:02:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-14 13:02:58,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699788583509514 [2024-06-14 13:02:58,877 INFO L175 Difference]: Start difference. First operand has 195 places, 277 transitions, 3300 flow. Second operand 11 states and 175 transitions. [2024-06-14 13:02:58,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 307 transitions, 4070 flow [2024-06-14 13:02:59,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 307 transitions, 4006 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:02:59,049 INFO L231 Difference]: Finished difference. Result has 203 places, 277 transitions, 3347 flow [2024-06-14 13:02:59,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3347, PETRI_PLACES=203, PETRI_TRANSITIONS=277} [2024-06-14 13:02:59,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-14 13:02:59,050 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 277 transitions, 3347 flow [2024-06-14 13:02:59,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:59,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:59,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:59,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:02:59,050 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:02:59,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:59,051 INFO L85 PathProgramCache]: Analyzing trace with hash -691341592, now seen corresponding path program 4 times [2024-06-14 13:02:59,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:59,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773167988] [2024-06-14 13:02:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:59,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:01,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773167988] [2024-06-14 13:03:01,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773167988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:01,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:01,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:01,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465121752] [2024-06-14 13:03:01,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:01,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:01,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:01,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:01,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:01,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:03:01,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 277 transitions, 3347 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:01,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:01,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:03:01,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:03,282 INFO L124 PetriNetUnfolderBase]: 2460/4101 cut-off events. [2024-06-14 13:03:03,282 INFO L125 PetriNetUnfolderBase]: For 106571/106581 co-relation queries the response was YES. [2024-06-14 13:03:03,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23598 conditions, 4101 events. 2460/4101 cut-off events. For 106571/106581 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 25209 event pairs, 531 based on Foata normal form. 12/4110 useless extension candidates. Maximal degree in co-relation 23503. Up to 3715 conditions per place. [2024-06-14 13:03:03,320 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 254 selfloop transitions, 57 changer transitions 0/316 dead transitions. [2024-06-14 13:03:03,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 316 transitions, 4192 flow [2024-06-14 13:03:03,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:03,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:03:03,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 13:03:03,321 INFO L175 Difference]: Start difference. First operand has 203 places, 277 transitions, 3347 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:03:03,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 316 transitions, 4192 flow [2024-06-14 13:03:03,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 316 transitions, 4080 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:03:03,516 INFO L231 Difference]: Finished difference. Result has 204 places, 280 transitions, 3395 flow [2024-06-14 13:03:03,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3241, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3395, PETRI_PLACES=204, PETRI_TRANSITIONS=280} [2024-06-14 13:03:03,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-14 13:03:03,517 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 280 transitions, 3395 flow [2024-06-14 13:03:03,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:03,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:03,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:03,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:03:03,517 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:03,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:03,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1220559016, now seen corresponding path program 5 times [2024-06-14 13:03:03,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:03,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284812060] [2024-06-14 13:03:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:03,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:06,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:06,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284812060] [2024-06-14 13:03:06,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284812060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:06,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:06,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:06,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496269596] [2024-06-14 13:03:06,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:06,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:06,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:06,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:06,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:03:06,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 280 transitions, 3395 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:06,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:06,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:03:06,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:07,629 INFO L124 PetriNetUnfolderBase]: 2454/4089 cut-off events. [2024-06-14 13:03:07,629 INFO L125 PetriNetUnfolderBase]: For 109300/109302 co-relation queries the response was YES. [2024-06-14 13:03:07,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23623 conditions, 4089 events. 2454/4089 cut-off events. For 109300/109302 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 25103 event pairs, 538 based on Foata normal form. 2/4088 useless extension candidates. Maximal degree in co-relation 23527. Up to 3710 conditions per place. [2024-06-14 13:03:07,666 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 246 selfloop transitions, 52 changer transitions 0/303 dead transitions. [2024-06-14 13:03:07,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 303 transitions, 4063 flow [2024-06-14 13:03:07,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:03:07,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:03:07,667 INFO L175 Difference]: Start difference. First operand has 204 places, 280 transitions, 3395 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:03:07,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 303 transitions, 4063 flow [2024-06-14 13:03:07,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 303 transitions, 3941 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 13:03:07,859 INFO L231 Difference]: Finished difference. Result has 203 places, 280 transitions, 3387 flow [2024-06-14 13:03:07,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3273, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3387, PETRI_PLACES=203, PETRI_TRANSITIONS=280} [2024-06-14 13:03:07,859 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-14 13:03:07,859 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 280 transitions, 3387 flow [2024-06-14 13:03:07,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:07,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:07,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:07,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:03:07,860 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:07,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:07,860 INFO L85 PathProgramCache]: Analyzing trace with hash -678443422, now seen corresponding path program 6 times [2024-06-14 13:03:07,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:07,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503929096] [2024-06-14 13:03:07,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:07,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:10,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:10,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503929096] [2024-06-14 13:03:10,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503929096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:10,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:10,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:10,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893824001] [2024-06-14 13:03:10,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:10,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:10,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:10,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:10,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:10,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:03:10,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 280 transitions, 3387 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:10,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:10,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:03:10,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:11,987 INFO L124 PetriNetUnfolderBase]: 2448/4080 cut-off events. [2024-06-14 13:03:11,988 INFO L125 PetriNetUnfolderBase]: For 104094/104105 co-relation queries the response was YES. [2024-06-14 13:03:12,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23377 conditions, 4080 events. 2448/4080 cut-off events. For 104094/104105 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 25058 event pairs, 556 based on Foata normal form. 4/4071 useless extension candidates. Maximal degree in co-relation 23282. Up to 3680 conditions per place. [2024-06-14 13:03:12,025 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 244 selfloop transitions, 57 changer transitions 0/306 dead transitions. [2024-06-14 13:03:12,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 306 transitions, 4101 flow [2024-06-14 13:03:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:03:12,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-14 13:03:12,026 INFO L175 Difference]: Start difference. First operand has 203 places, 280 transitions, 3387 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:03:12,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 306 transitions, 4101 flow [2024-06-14 13:03:12,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 306 transitions, 3991 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:03:12,215 INFO L231 Difference]: Finished difference. Result has 205 places, 289 transitions, 3505 flow [2024-06-14 13:03:12,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3277, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3505, PETRI_PLACES=205, PETRI_TRANSITIONS=289} [2024-06-14 13:03:12,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-14 13:03:12,216 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 289 transitions, 3505 flow [2024-06-14 13:03:12,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:12,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:12,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:12,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:03:12,217 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:12,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:12,217 INFO L85 PathProgramCache]: Analyzing trace with hash 196134332, now seen corresponding path program 1 times [2024-06-14 13:03:12,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:12,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376795747] [2024-06-14 13:03:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:12,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:14,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:14,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376795747] [2024-06-14 13:03:14,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376795747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:14,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:14,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:14,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291583215] [2024-06-14 13:03:14,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:14,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:14,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:14,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:14,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:03:14,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 289 transitions, 3505 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:14,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:14,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:03:14,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:16,065 INFO L124 PetriNetUnfolderBase]: 2458/4108 cut-off events. [2024-06-14 13:03:16,065 INFO L125 PetriNetUnfolderBase]: For 104472/104477 co-relation queries the response was YES. [2024-06-14 13:03:16,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23858 conditions, 4108 events. 2458/4108 cut-off events. For 104472/104477 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 25376 event pairs, 611 based on Foata normal form. 4/4108 useless extension candidates. Maximal degree in co-relation 23761. Up to 3796 conditions per place. [2024-06-14 13:03:16,103 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 283 selfloop transitions, 27 changer transitions 0/315 dead transitions. [2024-06-14 13:03:16,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 315 transitions, 4331 flow [2024-06-14 13:03:16,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:03:16,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 13:03:16,104 INFO L175 Difference]: Start difference. First operand has 205 places, 289 transitions, 3505 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:03:16,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 315 transitions, 4331 flow [2024-06-14 13:03:16,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 315 transitions, 4275 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 13:03:16,311 INFO L231 Difference]: Finished difference. Result has 210 places, 295 transitions, 3587 flow [2024-06-14 13:03:16,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3449, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3587, PETRI_PLACES=210, PETRI_TRANSITIONS=295} [2024-06-14 13:03:16,312 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-14 13:03:16,312 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 295 transitions, 3587 flow [2024-06-14 13:03:16,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:16,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:16,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:16,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:03:16,312 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:16,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash 75547484, now seen corresponding path program 2 times [2024-06-14 13:03:16,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:16,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597047092] [2024-06-14 13:03:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:16,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:18,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:18,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597047092] [2024-06-14 13:03:18,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597047092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:18,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:18,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:18,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535223848] [2024-06-14 13:03:18,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:18,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:18,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:18,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:18,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:18,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:03:18,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 295 transitions, 3587 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:18,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:18,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:03:18,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:20,062 INFO L124 PetriNetUnfolderBase]: 2468/4122 cut-off events. [2024-06-14 13:03:20,063 INFO L125 PetriNetUnfolderBase]: For 109502/109507 co-relation queries the response was YES. [2024-06-14 13:03:20,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24386 conditions, 4122 events. 2468/4122 cut-off events. For 109502/109507 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 25515 event pairs, 608 based on Foata normal form. 4/4122 useless extension candidates. Maximal degree in co-relation 24287. Up to 3815 conditions per place. [2024-06-14 13:03:20,104 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 287 selfloop transitions, 27 changer transitions 0/319 dead transitions. [2024-06-14 13:03:20,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 319 transitions, 4395 flow [2024-06-14 13:03:20,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-14 13:03:20,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:03:20,105 INFO L175 Difference]: Start difference. First operand has 210 places, 295 transitions, 3587 flow. Second operand 8 states and 132 transitions. [2024-06-14 13:03:20,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 319 transitions, 4395 flow [2024-06-14 13:03:20,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 319 transitions, 4339 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 13:03:20,301 INFO L231 Difference]: Finished difference. Result has 215 places, 298 transitions, 3633 flow [2024-06-14 13:03:20,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3535, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3633, PETRI_PLACES=215, PETRI_TRANSITIONS=298} [2024-06-14 13:03:20,301 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 13:03:20,301 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 298 transitions, 3633 flow [2024-06-14 13:03:20,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:20,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:20,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:20,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:03:20,302 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:20,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:20,302 INFO L85 PathProgramCache]: Analyzing trace with hash 75541904, now seen corresponding path program 3 times [2024-06-14 13:03:20,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:20,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224568858] [2024-06-14 13:03:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:20,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:22,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:22,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224568858] [2024-06-14 13:03:22,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224568858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:22,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:22,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:22,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220871247] [2024-06-14 13:03:22,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:22,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:22,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:22,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:22,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:22,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:03:22,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 298 transitions, 3633 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:22,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:22,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:03:22,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:23,870 INFO L124 PetriNetUnfolderBase]: 2462/4114 cut-off events. [2024-06-14 13:03:23,870 INFO L125 PetriNetUnfolderBase]: For 111972/111977 co-relation queries the response was YES. [2024-06-14 13:03:23,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24394 conditions, 4114 events. 2462/4114 cut-off events. For 111972/111977 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 25454 event pairs, 611 based on Foata normal form. 4/4114 useless extension candidates. Maximal degree in co-relation 24293. Up to 3810 conditions per place. [2024-06-14 13:03:23,904 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 286 selfloop transitions, 25 changer transitions 0/316 dead transitions. [2024-06-14 13:03:23,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 316 transitions, 4303 flow [2024-06-14 13:03:23,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:03:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:03:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:03:23,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:03:23,905 INFO L175 Difference]: Start difference. First operand has 215 places, 298 transitions, 3633 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:03:23,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 316 transitions, 4303 flow [2024-06-14 13:03:24,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 316 transitions, 4191 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:03:24,106 INFO L231 Difference]: Finished difference. Result has 215 places, 298 transitions, 3577 flow [2024-06-14 13:03:24,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3577, PETRI_PLACES=215, PETRI_TRANSITIONS=298} [2024-06-14 13:03:24,106 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 13:03:24,106 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 298 transitions, 3577 flow [2024-06-14 13:03:24,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:24,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:24,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:24,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:03:24,106 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:24,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:24,107 INFO L85 PathProgramCache]: Analyzing trace with hash -699298608, now seen corresponding path program 1 times [2024-06-14 13:03:24,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:24,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023965831] [2024-06-14 13:03:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:24,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:27,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:27,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023965831] [2024-06-14 13:03:27,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023965831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:27,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:27,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:27,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320334206] [2024-06-14 13:03:27,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:27,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:27,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:27,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:27,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:03:27,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 298 transitions, 3577 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:27,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:27,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:03:27,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:28,987 INFO L124 PetriNetUnfolderBase]: 2475/4130 cut-off events. [2024-06-14 13:03:28,988 INFO L125 PetriNetUnfolderBase]: For 115310/115320 co-relation queries the response was YES. [2024-06-14 13:03:29,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24574 conditions, 4130 events. 2475/4130 cut-off events. For 115310/115320 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 25500 event pairs, 541 based on Foata normal form. 11/4135 useless extension candidates. Maximal degree in co-relation 24472. Up to 3692 conditions per place. [2024-06-14 13:03:29,026 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 271 selfloop transitions, 64 changer transitions 0/340 dead transitions. [2024-06-14 13:03:29,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 340 transitions, 4655 flow [2024-06-14 13:03:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:03:29,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:03:29,027 INFO L175 Difference]: Start difference. First operand has 215 places, 298 transitions, 3577 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:03:29,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 340 transitions, 4655 flow [2024-06-14 13:03:29,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 340 transitions, 4605 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:29,256 INFO L231 Difference]: Finished difference. Result has 218 places, 307 transitions, 3799 flow [2024-06-14 13:03:29,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3527, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3799, PETRI_PLACES=218, PETRI_TRANSITIONS=307} [2024-06-14 13:03:29,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-14 13:03:29,256 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 307 transitions, 3799 flow [2024-06-14 13:03:29,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:29,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:29,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:29,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:03:29,257 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:29,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:29,257 INFO L85 PathProgramCache]: Analyzing trace with hash -699178638, now seen corresponding path program 2 times [2024-06-14 13:03:29,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:29,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050008490] [2024-06-14 13:03:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:29,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:32,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:32,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050008490] [2024-06-14 13:03:32,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050008490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:32,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:32,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:32,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458109038] [2024-06-14 13:03:32,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:32,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:32,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:32,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:32,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:32,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:03:32,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 307 transitions, 3799 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:32,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:32,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:03:32,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:34,362 INFO L124 PetriNetUnfolderBase]: 2490/4154 cut-off events. [2024-06-14 13:03:34,362 INFO L125 PetriNetUnfolderBase]: For 121697/121710 co-relation queries the response was YES. [2024-06-14 13:03:34,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25265 conditions, 4154 events. 2490/4154 cut-off events. For 121697/121710 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 25643 event pairs, 534 based on Foata normal form. 13/4163 useless extension candidates. Maximal degree in co-relation 25162. Up to 3793 conditions per place. [2024-06-14 13:03:34,400 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 281 selfloop transitions, 57 changer transitions 0/343 dead transitions. [2024-06-14 13:03:34,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 343 transitions, 4692 flow [2024-06-14 13:03:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:03:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:03:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:03:34,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 13:03:34,402 INFO L175 Difference]: Start difference. First operand has 218 places, 307 transitions, 3799 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:03:34,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 343 transitions, 4692 flow [2024-06-14 13:03:34,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 343 transitions, 4585 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-14 13:03:34,634 INFO L231 Difference]: Finished difference. Result has 223 places, 316 transitions, 3952 flow [2024-06-14 13:03:34,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3710, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3952, PETRI_PLACES=223, PETRI_TRANSITIONS=316} [2024-06-14 13:03:34,634 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-14 13:03:34,634 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 316 transitions, 3952 flow [2024-06-14 13:03:34,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:34,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:34,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:34,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:03:34,635 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:34,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:34,635 INFO L85 PathProgramCache]: Analyzing trace with hash -694537008, now seen corresponding path program 3 times [2024-06-14 13:03:34,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:34,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244134101] [2024-06-14 13:03:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:34,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:37,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:37,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244134101] [2024-06-14 13:03:37,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244134101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:37,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:37,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:37,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678971459] [2024-06-14 13:03:37,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:37,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:37,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:37,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:37,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:37,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:03:37,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 316 transitions, 3952 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:37,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:37,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:03:37,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:39,333 INFO L124 PetriNetUnfolderBase]: 2503/4177 cut-off events. [2024-06-14 13:03:39,333 INFO L125 PetriNetUnfolderBase]: For 127935/127950 co-relation queries the response was YES. [2024-06-14 13:03:39,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25650 conditions, 4177 events. 2503/4177 cut-off events. For 127935/127950 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25830 event pairs, 537 based on Foata normal form. 15/4188 useless extension candidates. Maximal degree in co-relation 25545. Up to 3800 conditions per place. [2024-06-14 13:03:39,373 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 278 selfloop transitions, 63 changer transitions 0/346 dead transitions. [2024-06-14 13:03:39,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 346 transitions, 4884 flow [2024-06-14 13:03:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:03:39,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 13:03:39,375 INFO L175 Difference]: Start difference. First operand has 223 places, 316 transitions, 3952 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:03:39,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 346 transitions, 4884 flow [2024-06-14 13:03:39,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 346 transitions, 4779 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:03:39,603 INFO L231 Difference]: Finished difference. Result has 229 places, 322 transitions, 4090 flow [2024-06-14 13:03:39,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4090, PETRI_PLACES=229, PETRI_TRANSITIONS=322} [2024-06-14 13:03:39,603 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-14 13:03:39,603 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 322 transitions, 4090 flow [2024-06-14 13:03:39,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:39,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:39,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:39,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:03:39,604 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:39,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:39,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1019007520, now seen corresponding path program 1 times [2024-06-14 13:03:39,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:39,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272852152] [2024-06-14 13:03:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:39,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:43,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:43,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272852152] [2024-06-14 13:03:43,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272852152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:43,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:43,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:03:43,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265750532] [2024-06-14 13:03:43,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:43,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:03:43,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:43,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:03:43,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:03:43,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:03:43,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 322 transitions, 4090 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:43,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:43,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:03:43,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:44,778 INFO L124 PetriNetUnfolderBase]: 2414/4054 cut-off events. [2024-06-14 13:03:44,779 INFO L125 PetriNetUnfolderBase]: For 136641/136689 co-relation queries the response was YES. [2024-06-14 13:03:44,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25206 conditions, 4054 events. 2414/4054 cut-off events. For 136641/136689 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25286 event pairs, 503 based on Foata normal form. 41/4063 useless extension candidates. Maximal degree in co-relation 25099. Up to 3597 conditions per place. [2024-06-14 13:03:44,816 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 257 selfloop transitions, 65 changer transitions 0/350 dead transitions. [2024-06-14 13:03:44,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 350 transitions, 4844 flow [2024-06-14 13:03:44,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:03:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:03:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:03:44,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 13:03:44,818 INFO L175 Difference]: Start difference. First operand has 229 places, 322 transitions, 4090 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:03:44,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 350 transitions, 4844 flow [2024-06-14 13:03:45,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 350 transitions, 4691 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:45,087 INFO L231 Difference]: Finished difference. Result has 233 places, 324 transitions, 4113 flow [2024-06-14 13:03:45,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3937, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4113, PETRI_PLACES=233, PETRI_TRANSITIONS=324} [2024-06-14 13:03:45,088 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-14 13:03:45,088 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 324 transitions, 4113 flow [2024-06-14 13:03:45,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:45,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:45,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:45,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:03:45,088 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)] === [2024-06-14 13:03:45,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2020482888, now seen corresponding path program 4 times [2024-06-14 13:03:45,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:45,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948954734] [2024-06-14 13:03:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:45,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:48,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:48,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948954734] [2024-06-14 13:03:48,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948954734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:48,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:48,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:48,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346198385] [2024-06-14 13:03:48,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:48,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:48,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:48,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:48,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:48,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:03:48,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 324 transitions, 4113 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:48,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:48,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:03:48,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:49,585 INFO L124 PetriNetUnfolderBase]: 2532/4220 cut-off events. [2024-06-14 13:03:49,586 INFO L125 PetriNetUnfolderBase]: For 140287/140299 co-relation queries the response was YES. [2024-06-14 13:03:49,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26347 conditions, 4220 events. 2532/4220 cut-off events. For 140287/140299 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 26136 event pairs, 548 based on Foata normal form. 13/4227 useless extension candidates. Maximal degree in co-relation 26239. Up to 3760 conditions per place. [2024-06-14 13:03:49,630 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 264 selfloop transitions, 88 changer transitions 0/357 dead transitions. [2024-06-14 13:03:49,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 357 transitions, 5189 flow [2024-06-14 13:03:49,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 13:03:49,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:03:49,631 INFO L175 Difference]: Start difference. First operand has 233 places, 324 transitions, 4113 flow. Second operand 7 states and 129 transitions. [2024-06-14 13:03:49,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 357 transitions, 5189 flow [2024-06-14 13:03:49,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 357 transitions, 5031 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:03:49,854 INFO L231 Difference]: Finished difference. Result has 233 places, 330 transitions, 4241 flow [2024-06-14 13:03:49,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3955, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4241, PETRI_PLACES=233, PETRI_TRANSITIONS=330} [2024-06-14 13:03:49,854 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-14 13:03:49,854 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 330 transitions, 4241 flow [2024-06-14 13:03:49,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:49,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:49,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:49,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:03:49,854 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:49,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:49,855 INFO L85 PathProgramCache]: Analyzing trace with hash -424212094, now seen corresponding path program 5 times [2024-06-14 13:03:49,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:49,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80890683] [2024-06-14 13:03:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:49,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:52,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:52,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80890683] [2024-06-14 13:03:52,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80890683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:52,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:52,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:52,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210002979] [2024-06-14 13:03:52,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:52,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:52,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:52,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:52,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:03:52,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 330 transitions, 4241 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:52,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:52,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:03:52,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:54,232 INFO L124 PetriNetUnfolderBase]: 2537/4232 cut-off events. [2024-06-14 13:03:54,232 INFO L125 PetriNetUnfolderBase]: For 146483/146535 co-relation queries the response was YES. [2024-06-14 13:03:54,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26498 conditions, 4232 events. 2537/4232 cut-off events. For 146483/146535 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26290 event pairs, 563 based on Foata normal form. 37/4257 useless extension candidates. Maximal degree in co-relation 26389. Up to 3766 conditions per place. [2024-06-14 13:03:54,277 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 264 selfloop transitions, 88 changer transitions 0/357 dead transitions. [2024-06-14 13:03:54,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 357 transitions, 5269 flow [2024-06-14 13:03:54,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:54,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:03:54,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:03:54,278 INFO L175 Difference]: Start difference. First operand has 233 places, 330 transitions, 4241 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:03:54,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 357 transitions, 5269 flow [2024-06-14 13:03:54,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 357 transitions, 5117 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 13:03:54,538 INFO L231 Difference]: Finished difference. Result has 236 places, 333 transitions, 4331 flow [2024-06-14 13:03:54,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4331, PETRI_PLACES=236, PETRI_TRANSITIONS=333} [2024-06-14 13:03:54,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 192 predicate places. [2024-06-14 13:03:54,539 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 333 transitions, 4331 flow [2024-06-14 13:03:54,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:54,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:54,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:54,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:03:54,540 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)] === [2024-06-14 13:03:54,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:54,540 INFO L85 PathProgramCache]: Analyzing trace with hash -809536914, now seen corresponding path program 6 times [2024-06-14 13:03:54,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:54,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323186711] [2024-06-14 13:03:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:54,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:57,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:57,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323186711] [2024-06-14 13:03:57,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323186711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:57,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:57,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:03:57,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048702124] [2024-06-14 13:03:57,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:57,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:03:57,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:57,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:03:57,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:03:57,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:03:57,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 333 transitions, 4331 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:57,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:57,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:03:57,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:58,917 INFO L124 PetriNetUnfolderBase]: 2534/4224 cut-off events. [2024-06-14 13:03:58,917 INFO L125 PetriNetUnfolderBase]: For 144472/144487 co-relation queries the response was YES. [2024-06-14 13:03:58,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26414 conditions, 4224 events. 2534/4224 cut-off events. For 144472/144487 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26177 event pairs, 537 based on Foata normal form. 15/4235 useless extension candidates. Maximal degree in co-relation 26305. Up to 3846 conditions per place. [2024-06-14 13:03:58,953 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 287 selfloop transitions, 62 changer transitions 0/354 dead transitions. [2024-06-14 13:03:58,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 354 transitions, 5093 flow [2024-06-14 13:03:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:03:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:03:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:03:58,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 13:03:58,955 INFO L175 Difference]: Start difference. First operand has 236 places, 333 transitions, 4331 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:03:58,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 354 transitions, 5093 flow [2024-06-14 13:03:59,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 354 transitions, 4817 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 13:03:59,192 INFO L231 Difference]: Finished difference. Result has 238 places, 333 transitions, 4196 flow [2024-06-14 13:03:59,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4196, PETRI_PLACES=238, PETRI_TRANSITIONS=333} [2024-06-14 13:03:59,193 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-14 13:03:59,193 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 333 transitions, 4196 flow [2024-06-14 13:03:59,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:59,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:59,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:59,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:03:59,194 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:59,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:59,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2119835532, now seen corresponding path program 7 times [2024-06-14 13:03:59,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:59,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588436723] [2024-06-14 13:03:59,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:59,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:01,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:01,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588436723] [2024-06-14 13:04:01,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588436723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:01,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:01,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:01,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102958810] [2024-06-14 13:04:01,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:01,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:01,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:01,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:01,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:01,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:04:01,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 333 transitions, 4196 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:01,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:01,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:04:01,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:03,315 INFO L124 PetriNetUnfolderBase]: 2539/4235 cut-off events. [2024-06-14 13:04:03,316 INFO L125 PetriNetUnfolderBase]: For 149814/149866 co-relation queries the response was YES. [2024-06-14 13:04:03,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26429 conditions, 4235 events. 2539/4235 cut-off events. For 149814/149866 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26284 event pairs, 563 based on Foata normal form. 37/4260 useless extension candidates. Maximal degree in co-relation 26319. Up to 3769 conditions per place. [2024-06-14 13:04:03,358 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 258 selfloop transitions, 92 changer transitions 0/355 dead transitions. [2024-06-14 13:04:03,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 355 transitions, 5095 flow [2024-06-14 13:04:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:03,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:04:03,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:04:03,359 INFO L175 Difference]: Start difference. First operand has 238 places, 333 transitions, 4196 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:04:03,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 355 transitions, 5095 flow [2024-06-14 13:04:03,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 355 transitions, 4971 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:04:03,594 INFO L231 Difference]: Finished difference. Result has 239 places, 336 transitions, 4303 flow [2024-06-14 13:04:03,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4072, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4303, PETRI_PLACES=239, PETRI_TRANSITIONS=336} [2024-06-14 13:04:03,594 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-14 13:04:03,594 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 336 transitions, 4303 flow [2024-06-14 13:04:03,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:03,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:03,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:03,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:04:03,595 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:03,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:03,595 INFO L85 PathProgramCache]: Analyzing trace with hash -51808856, now seen corresponding path program 8 times [2024-06-14 13:04:03,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:03,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977172957] [2024-06-14 13:04:03,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:03,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:06,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:06,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977172957] [2024-06-14 13:04:06,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977172957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:06,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:06,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:06,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209304661] [2024-06-14 13:04:06,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:06,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:06,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:06,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:06,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:06,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:04:06,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 336 transitions, 4303 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:06,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:06,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:04:06,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:08,157 INFO L124 PetriNetUnfolderBase]: 2533/4223 cut-off events. [2024-06-14 13:04:08,157 INFO L125 PetriNetUnfolderBase]: For 152308/152323 co-relation queries the response was YES. [2024-06-14 13:04:08,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26446 conditions, 4223 events. 2533/4223 cut-off events. For 152308/152323 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26195 event pairs, 541 based on Foata normal form. 16/4235 useless extension candidates. Maximal degree in co-relation 26335. Up to 3778 conditions per place. [2024-06-14 13:04:08,204 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 283 selfloop transitions, 83 changer transitions 0/371 dead transitions. [2024-06-14 13:04:08,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 371 transitions, 5241 flow [2024-06-14 13:04:08,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:08,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:04:08,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:04:08,206 INFO L175 Difference]: Start difference. First operand has 239 places, 336 transitions, 4303 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:04:08,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 371 transitions, 5241 flow [2024-06-14 13:04:08,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 371 transitions, 5040 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 13:04:08,462 INFO L231 Difference]: Finished difference. Result has 243 places, 336 transitions, 4303 flow [2024-06-14 13:04:08,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4303, PETRI_PLACES=243, PETRI_TRANSITIONS=336} [2024-06-14 13:04:08,463 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-14 13:04:08,463 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 336 transitions, 4303 flow [2024-06-14 13:04:08,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:08,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:08,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:08,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:04:08,463 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:08,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:08,464 INFO L85 PathProgramCache]: Analyzing trace with hash -51802346, now seen corresponding path program 9 times [2024-06-14 13:04:08,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:08,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848005247] [2024-06-14 13:04:08,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:08,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:11,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:11,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848005247] [2024-06-14 13:04:11,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848005247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:11,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:11,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:11,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128872565] [2024-06-14 13:04:11,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:11,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:11,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:11,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:11,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:11,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:04:11,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 336 transitions, 4303 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:11,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:11,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:04:11,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:12,540 INFO L124 PetriNetUnfolderBase]: 2530/4223 cut-off events. [2024-06-14 13:04:12,540 INFO L125 PetriNetUnfolderBase]: For 156365/156417 co-relation queries the response was YES. [2024-06-14 13:04:12,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26508 conditions, 4223 events. 2530/4223 cut-off events. For 156365/156417 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26226 event pairs, 563 based on Foata normal form. 37/4248 useless extension candidates. Maximal degree in co-relation 26396. Up to 3775 conditions per place. [2024-06-14 13:04:12,583 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 273 selfloop transitions, 79 changer transitions 0/357 dead transitions. [2024-06-14 13:04:12,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 357 transitions, 5073 flow [2024-06-14 13:04:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:04:12,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:04:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 13:04:12,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:04:12,585 INFO L175 Difference]: Start difference. First operand has 243 places, 336 transitions, 4303 flow. Second operand 6 states and 110 transitions. [2024-06-14 13:04:12,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 357 transitions, 5073 flow [2024-06-14 13:04:12,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 357 transitions, 4805 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-14 13:04:12,853 INFO L231 Difference]: Finished difference. Result has 239 places, 336 transitions, 4203 flow [2024-06-14 13:04:12,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4203, PETRI_PLACES=239, PETRI_TRANSITIONS=336} [2024-06-14 13:04:12,854 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-14 13:04:12,854 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 336 transitions, 4203 flow [2024-06-14 13:04:12,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:12,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:12,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:12,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:04:12,854 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:12,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:12,854 INFO L85 PathProgramCache]: Analyzing trace with hash 43607176, now seen corresponding path program 2 times [2024-06-14 13:04:12,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:12,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933405712] [2024-06-14 13:04:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:12,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:16,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:16,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933405712] [2024-06-14 13:04:16,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933405712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:16,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:16,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:16,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140315869] [2024-06-14 13:04:16,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:16,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:16,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:16,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:16,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:16,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:04:16,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 336 transitions, 4203 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:16,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:16,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:04:16,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:17,683 INFO L124 PetriNetUnfolderBase]: 2439/4093 cut-off events. [2024-06-14 13:04:17,684 INFO L125 PetriNetUnfolderBase]: For 143925/143973 co-relation queries the response was YES. [2024-06-14 13:04:17,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25496 conditions, 4093 events. 2439/4093 cut-off events. For 143925/143973 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25586 event pairs, 506 based on Foata normal form. 41/4099 useless extension candidates. Maximal degree in co-relation 25385. Up to 3621 conditions per place. [2024-06-14 13:04:17,726 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 269 selfloop transitions, 64 changer transitions 0/361 dead transitions. [2024-06-14 13:04:17,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 361 transitions, 4977 flow [2024-06-14 13:04:17,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:17,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:04:17,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 13:04:17,727 INFO L175 Difference]: Start difference. First operand has 239 places, 336 transitions, 4203 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:04:17,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 361 transitions, 4977 flow [2024-06-14 13:04:17,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 361 transitions, 4813 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 13:04:17,949 INFO L231 Difference]: Finished difference. Result has 240 places, 338 transitions, 4221 flow [2024-06-14 13:04:17,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4039, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4221, PETRI_PLACES=240, PETRI_TRANSITIONS=338} [2024-06-14 13:04:17,950 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-14 13:04:17,950 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 338 transitions, 4221 flow [2024-06-14 13:04:17,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:17,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:17,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:17,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:04:17,950 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:17,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:17,951 INFO L85 PathProgramCache]: Analyzing trace with hash 443104486, now seen corresponding path program 3 times [2024-06-14 13:04:17,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:17,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671462356] [2024-06-14 13:04:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:17,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:21,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:21,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671462356] [2024-06-14 13:04:21,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671462356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:21,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:21,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:21,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022871867] [2024-06-14 13:04:21,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:21,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:21,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:21,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:21,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:04:21,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 338 transitions, 4221 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:21,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:21,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:04:21,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:22,870 INFO L124 PetriNetUnfolderBase]: 2457/4121 cut-off events. [2024-06-14 13:04:22,870 INFO L125 PetriNetUnfolderBase]: For 146701/146781 co-relation queries the response was YES. [2024-06-14 13:04:22,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25735 conditions, 4121 events. 2457/4121 cut-off events. For 146701/146781 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25784 event pairs, 518 based on Foata normal form. 60/4133 useless extension candidates. Maximal degree in co-relation 25624. Up to 3625 conditions per place. [2024-06-14 13:04:22,912 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 261 selfloop transitions, 68 changer transitions 0/357 dead transitions. [2024-06-14 13:04:22,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 357 transitions, 4973 flow [2024-06-14 13:04:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:04:22,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:04:22,914 INFO L175 Difference]: Start difference. First operand has 240 places, 338 transitions, 4221 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:04:22,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 357 transitions, 4973 flow [2024-06-14 13:04:23,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 357 transitions, 4811 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:23,194 INFO L231 Difference]: Finished difference. Result has 242 places, 340 transitions, 4249 flow [2024-06-14 13:04:23,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4063, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4249, PETRI_PLACES=242, PETRI_TRANSITIONS=340} [2024-06-14 13:04:23,195 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-14 13:04:23,195 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 340 transitions, 4249 flow [2024-06-14 13:04:23,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:23,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:23,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:23,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:04:23,195 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:23,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:23,196 INFO L85 PathProgramCache]: Analyzing trace with hash 457389286, now seen corresponding path program 4 times [2024-06-14 13:04:23,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:23,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805841429] [2024-06-14 13:04:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:23,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:26,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:26,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805841429] [2024-06-14 13:04:26,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805841429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:26,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:26,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:26,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761912658] [2024-06-14 13:04:26,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:26,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:26,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:26,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:26,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:26,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:04:26,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 340 transitions, 4249 flow. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 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) [2024-06-14 13:04:26,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:26,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:04:26,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:27,724 INFO L124 PetriNetUnfolderBase]: 2447/4107 cut-off events. [2024-06-14 13:04:27,724 INFO L125 PetriNetUnfolderBase]: For 141029/141109 co-relation queries the response was YES. [2024-06-14 13:04:27,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25360 conditions, 4107 events. 2447/4107 cut-off events. For 141029/141109 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25674 event pairs, 516 based on Foata normal form. 60/4119 useless extension candidates. Maximal degree in co-relation 25248. Up to 3561 conditions per place. [2024-06-14 13:04:27,771 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 257 selfloop transitions, 74 changer transitions 0/359 dead transitions. [2024-06-14 13:04:27,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 359 transitions, 5005 flow [2024-06-14 13:04:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:04:27,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:04:27,772 INFO L175 Difference]: Start difference. First operand has 242 places, 340 transitions, 4249 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:04:27,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 359 transitions, 5005 flow [2024-06-14 13:04:28,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 359 transitions, 4837 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:28,038 INFO L231 Difference]: Finished difference. Result has 244 places, 342 transitions, 4282 flow [2024-06-14 13:04:28,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4282, PETRI_PLACES=244, PETRI_TRANSITIONS=342} [2024-06-14 13:04:28,039 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 200 predicate places. [2024-06-14 13:04:28,039 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 342 transitions, 4282 flow [2024-06-14 13:04:28,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 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) [2024-06-14 13:04:28,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:28,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:28,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:04:28,039 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:28,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:28,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2038118770, now seen corresponding path program 1 times [2024-06-14 13:04:28,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:28,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898151330] [2024-06-14 13:04:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:28,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:30,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:30,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898151330] [2024-06-14 13:04:30,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898151330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:30,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:30,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:30,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946758865] [2024-06-14 13:04:30,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:30,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:30,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:30,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:30,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:04:30,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 342 transitions, 4282 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:30,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:30,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:04:30,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:31,717 INFO L124 PetriNetUnfolderBase]: 2560/4267 cut-off events. [2024-06-14 13:04:31,718 INFO L125 PetriNetUnfolderBase]: For 142977/142982 co-relation queries the response was YES. [2024-06-14 13:04:31,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26359 conditions, 4267 events. 2560/4267 cut-off events. For 142977/142982 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26535 event pairs, 577 based on Foata normal form. 4/4267 useless extension candidates. Maximal degree in co-relation 26246. Up to 3939 conditions per place. [2024-06-14 13:04:31,764 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 340 selfloop transitions, 24 changer transitions 0/369 dead transitions. [2024-06-14 13:04:31,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 369 transitions, 5240 flow [2024-06-14 13:04:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:31,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:31,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 13:04:31,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 13:04:31,773 INFO L175 Difference]: Start difference. First operand has 244 places, 342 transitions, 4282 flow. Second operand 7 states and 121 transitions. [2024-06-14 13:04:31,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 369 transitions, 5240 flow [2024-06-14 13:04:32,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 369 transitions, 5055 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:32,031 INFO L231 Difference]: Finished difference. Result has 246 places, 346 transitions, 4222 flow [2024-06-14 13:04:32,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4097, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4222, PETRI_PLACES=246, PETRI_TRANSITIONS=346} [2024-06-14 13:04:32,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-14 13:04:32,032 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 346 transitions, 4222 flow [2024-06-14 13:04:32,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:32,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:32,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:32,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:04:32,032 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:32,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:32,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1367629928, now seen corresponding path program 2 times [2024-06-14 13:04:32,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:32,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834729386] [2024-06-14 13:04:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:32,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:34,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:34,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834729386] [2024-06-14 13:04:34,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834729386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:34,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:34,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:34,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371673807] [2024-06-14 13:04:34,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:34,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:34,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:34,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:34,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:34,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:04:34,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 346 transitions, 4222 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:34,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:34,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:04:34,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:35,941 INFO L124 PetriNetUnfolderBase]: 2568/4279 cut-off events. [2024-06-14 13:04:35,941 INFO L125 PetriNetUnfolderBase]: For 146934/146939 co-relation queries the response was YES. [2024-06-14 13:04:35,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26346 conditions, 4279 events. 2568/4279 cut-off events. For 146934/146939 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26641 event pairs, 615 based on Foata normal form. 4/4279 useless extension candidates. Maximal degree in co-relation 26232. Up to 3986 conditions per place. [2024-06-14 13:04:35,989 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 339 selfloop transitions, 21 changer transitions 0/365 dead transitions. [2024-06-14 13:04:35,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 365 transitions, 5026 flow [2024-06-14 13:04:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:35,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 13:04:35,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-14 13:04:35,991 INFO L175 Difference]: Start difference. First operand has 246 places, 346 transitions, 4222 flow. Second operand 7 states and 115 transitions. [2024-06-14 13:04:35,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 365 transitions, 5026 flow [2024-06-14 13:04:36,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 365 transitions, 4951 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 13:04:36,277 INFO L231 Difference]: Finished difference. Result has 250 places, 348 transitions, 4236 flow [2024-06-14 13:04:36,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4159, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4236, PETRI_PLACES=250, PETRI_TRANSITIONS=348} [2024-06-14 13:04:36,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-14 13:04:36,278 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 348 transitions, 4236 flow [2024-06-14 13:04:36,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:36,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:36,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:36,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:04:36,278 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:36,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:36,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1953171668, now seen corresponding path program 3 times [2024-06-14 13:04:36,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:36,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749097155] [2024-06-14 13:04:36,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:36,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:38,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:38,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749097155] [2024-06-14 13:04:38,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749097155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:38,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:38,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:38,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827583860] [2024-06-14 13:04:38,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:38,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:38,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:38,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:04:38,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 348 transitions, 4236 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:38,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:38,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:04:38,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:40,127 INFO L124 PetriNetUnfolderBase]: 2563/4272 cut-off events. [2024-06-14 13:04:40,127 INFO L125 PetriNetUnfolderBase]: For 149091/149096 co-relation queries the response was YES. [2024-06-14 13:04:40,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26255 conditions, 4272 events. 2563/4272 cut-off events. For 149091/149096 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 26605 event pairs, 576 based on Foata normal form. 4/4272 useless extension candidates. Maximal degree in co-relation 26139. Up to 3960 conditions per place. [2024-06-14 13:04:40,168 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 343 selfloop transitions, 20 changer transitions 0/368 dead transitions. [2024-06-14 13:04:40,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 368 transitions, 5018 flow [2024-06-14 13:04:40,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:04:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:04:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:04:40,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:04:40,169 INFO L175 Difference]: Start difference. First operand has 250 places, 348 transitions, 4236 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:04:40,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 368 transitions, 5018 flow [2024-06-14 13:04:40,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 368 transitions, 4945 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:40,445 INFO L231 Difference]: Finished difference. Result has 251 places, 348 transitions, 4211 flow [2024-06-14 13:04:40,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4163, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4211, PETRI_PLACES=251, PETRI_TRANSITIONS=348} [2024-06-14 13:04:40,446 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-14 13:04:40,446 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 348 transitions, 4211 flow [2024-06-14 13:04:40,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:40,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:40,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:40,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:04:40,447 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:40,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:40,447 INFO L85 PathProgramCache]: Analyzing trace with hash 423323049, now seen corresponding path program 1 times [2024-06-14 13:04:40,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:40,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546189219] [2024-06-14 13:04:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:40,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:43,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:43,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546189219] [2024-06-14 13:04:43,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546189219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:43,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:43,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:43,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818861295] [2024-06-14 13:04:43,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:43,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:43,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:43,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:43,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:43,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:04:43,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 348 transitions, 4211 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:43,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:43,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:04:43,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:45,577 INFO L124 PetriNetUnfolderBase]: 2666/4428 cut-off events. [2024-06-14 13:04:45,577 INFO L125 PetriNetUnfolderBase]: For 175477/175487 co-relation queries the response was YES. [2024-06-14 13:04:45,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27466 conditions, 4428 events. 2666/4428 cut-off events. For 175477/175487 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 27374 event pairs, 454 based on Foata normal form. 18/4443 useless extension candidates. Maximal degree in co-relation 27349. Up to 3782 conditions per place. [2024-06-14 13:04:45,628 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 333 selfloop transitions, 68 changer transitions 0/406 dead transitions. [2024-06-14 13:04:45,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 406 transitions, 5380 flow [2024-06-14 13:04:45,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:04:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:04:45,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-14 13:04:45,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39957716701902746 [2024-06-14 13:04:45,630 INFO L175 Difference]: Start difference. First operand has 251 places, 348 transitions, 4211 flow. Second operand 11 states and 189 transitions. [2024-06-14 13:04:45,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 406 transitions, 5380 flow [2024-06-14 13:04:46,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 406 transitions, 5333 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:46,004 INFO L231 Difference]: Finished difference. Result has 259 places, 355 transitions, 4424 flow [2024-06-14 13:04:46,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4424, PETRI_PLACES=259, PETRI_TRANSITIONS=355} [2024-06-14 13:04:46,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-14 13:04:46,005 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 355 transitions, 4424 flow [2024-06-14 13:04:46,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:46,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:46,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:46,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:04:46,006 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:46,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:46,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1453344067, now seen corresponding path program 2 times [2024-06-14 13:04:46,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:46,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005725025] [2024-06-14 13:04:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:46,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:49,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:49,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005725025] [2024-06-14 13:04:49,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005725025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:49,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:49,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:49,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096118135] [2024-06-14 13:04:49,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:49,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:49,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:49,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:49,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:49,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:04:49,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 355 transitions, 4424 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:49,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:49,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:04:49,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:51,233 INFO L124 PetriNetUnfolderBase]: 2769/4585 cut-off events. [2024-06-14 13:04:51,233 INFO L125 PetriNetUnfolderBase]: For 197523/197533 co-relation queries the response was YES. [2024-06-14 13:04:51,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29252 conditions, 4585 events. 2769/4585 cut-off events. For 197523/197533 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28557 event pairs, 567 based on Foata normal form. 18/4600 useless extension candidates. Maximal degree in co-relation 29132. Up to 4069 conditions per place. [2024-06-14 13:04:51,281 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 340 selfloop transitions, 64 changer transitions 0/409 dead transitions. [2024-06-14 13:04:51,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 409 transitions, 5586 flow [2024-06-14 13:04:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:04:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:04:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 197 transitions. [2024-06-14 13:04:51,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817829457364341 [2024-06-14 13:04:51,283 INFO L175 Difference]: Start difference. First operand has 259 places, 355 transitions, 4424 flow. Second operand 12 states and 197 transitions. [2024-06-14 13:04:51,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 409 transitions, 5586 flow [2024-06-14 13:04:51,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 409 transitions, 5505 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:51,693 INFO L231 Difference]: Finished difference. Result has 267 places, 361 transitions, 4572 flow [2024-06-14 13:04:51,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4347, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4572, PETRI_PLACES=267, PETRI_TRANSITIONS=361} [2024-06-14 13:04:51,693 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-14 13:04:51,693 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 361 transitions, 4572 flow [2024-06-14 13:04:51,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:51,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:51,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:51,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:04:51,694 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)] === [2024-06-14 13:04:51,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:51,694 INFO L85 PathProgramCache]: Analyzing trace with hash 689346759, now seen corresponding path program 3 times [2024-06-14 13:04:51,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:51,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672539695] [2024-06-14 13:04:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:51,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:55,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:55,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:55,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672539695] [2024-06-14 13:04:55,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672539695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:55,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:55,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:55,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794096077] [2024-06-14 13:04:55,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:55,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:55,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:55,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:55,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:55,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:04:55,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 361 transitions, 4572 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:55,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:55,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:04:55,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:57,242 INFO L124 PetriNetUnfolderBase]: 2746/4552 cut-off events. [2024-06-14 13:04:57,242 INFO L125 PetriNetUnfolderBase]: For 192251/192261 co-relation queries the response was YES. [2024-06-14 13:04:57,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28882 conditions, 4552 events. 2746/4552 cut-off events. For 192251/192261 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28317 event pairs, 566 based on Foata normal form. 20/4569 useless extension candidates. Maximal degree in co-relation 28759. Up to 4109 conditions per place. [2024-06-14 13:04:57,291 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 339 selfloop transitions, 59 changer transitions 0/403 dead transitions. [2024-06-14 13:04:57,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 403 transitions, 5514 flow [2024-06-14 13:04:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:04:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:04:57,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-06-14 13:04:57,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38266384778012685 [2024-06-14 13:04:57,292 INFO L175 Difference]: Start difference. First operand has 267 places, 361 transitions, 4572 flow. Second operand 11 states and 181 transitions. [2024-06-14 13:04:57,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 403 transitions, 5514 flow [2024-06-14 13:04:57,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 403 transitions, 5426 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 13:04:57,735 INFO L231 Difference]: Finished difference. Result has 270 places, 361 transitions, 4607 flow [2024-06-14 13:04:57,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4484, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4607, PETRI_PLACES=270, PETRI_TRANSITIONS=361} [2024-06-14 13:04:57,736 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-14 13:04:57,736 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 361 transitions, 4607 flow [2024-06-14 13:04:57,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:57,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:57,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:57,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:04:57,736 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)] === [2024-06-14 13:04:57,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:57,736 INFO L85 PathProgramCache]: Analyzing trace with hash 511860909, now seen corresponding path program 1 times [2024-06-14 13:04:57,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:57,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233523172] [2024-06-14 13:04:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:57,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:01,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:01,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233523172] [2024-06-14 13:05:01,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233523172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:01,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:01,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:01,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256983381] [2024-06-14 13:05:01,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:01,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:01,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:01,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:01,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:01,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:05:01,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 361 transitions, 4607 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:01,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:01,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:05:01,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:03,798 INFO L124 PetriNetUnfolderBase]: 2759/4573 cut-off events. [2024-06-14 13:05:03,798 INFO L125 PetriNetUnfolderBase]: For 187156/187168 co-relation queries the response was YES. [2024-06-14 13:05:03,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29346 conditions, 4573 events. 2759/4573 cut-off events. For 187156/187168 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 28568 event pairs, 585 based on Foata normal form. 13/4580 useless extension candidates. Maximal degree in co-relation 29221. Up to 3766 conditions per place. [2024-06-14 13:05:03,847 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 252 selfloop transitions, 154 changer transitions 0/411 dead transitions. [2024-06-14 13:05:03,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 411 transitions, 5903 flow [2024-06-14 13:05:03,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:05:03,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 13:05:03,849 INFO L175 Difference]: Start difference. First operand has 270 places, 361 transitions, 4607 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:05:03,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 411 transitions, 5903 flow [2024-06-14 13:05:04,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 411 transitions, 5804 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 13:05:04,327 INFO L231 Difference]: Finished difference. Result has 271 places, 370 transitions, 4966 flow [2024-06-14 13:05:04,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4508, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4966, PETRI_PLACES=271, PETRI_TRANSITIONS=370} [2024-06-14 13:05:04,327 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-14 13:05:04,327 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 370 transitions, 4966 flow [2024-06-14 13:05:04,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:04,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:04,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:04,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:05:04,328 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)] === [2024-06-14 13:05:04,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:04,328 INFO L85 PathProgramCache]: Analyzing trace with hash 511981065, now seen corresponding path program 1 times [2024-06-14 13:05:04,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:04,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114642136] [2024-06-14 13:05:04,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:04,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:07,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:07,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:07,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114642136] [2024-06-14 13:05:07,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114642136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:07,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:07,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:07,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117742520] [2024-06-14 13:05:07,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:07,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:07,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:07,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:07,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:07,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:05:07,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 370 transitions, 4966 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:07,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:07,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:05:07,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:09,804 INFO L124 PetriNetUnfolderBase]: 2816/4657 cut-off events. [2024-06-14 13:05:09,804 INFO L125 PetriNetUnfolderBase]: For 205431/205446 co-relation queries the response was YES. [2024-06-14 13:05:09,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30958 conditions, 4657 events. 2816/4657 cut-off events. For 205431/205446 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29126 event pairs, 572 based on Foata normal form. 16/4669 useless extension candidates. Maximal degree in co-relation 30832. Up to 3933 conditions per place. [2024-06-14 13:05:09,861 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 269 selfloop transitions, 158 changer transitions 0/432 dead transitions. [2024-06-14 13:05:09,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 432 transitions, 6440 flow [2024-06-14 13:05:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:05:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:05:09,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-14 13:05:09,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39341085271317827 [2024-06-14 13:05:09,862 INFO L175 Difference]: Start difference. First operand has 271 places, 370 transitions, 4966 flow. Second operand 12 states and 203 transitions. [2024-06-14 13:05:09,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 432 transitions, 6440 flow [2024-06-14 13:05:10,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 432 transitions, 6248 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 13:05:10,349 INFO L231 Difference]: Finished difference. Result has 279 places, 388 transitions, 5372 flow [2024-06-14 13:05:10,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5372, PETRI_PLACES=279, PETRI_TRANSITIONS=388} [2024-06-14 13:05:10,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-14 13:05:10,349 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 388 transitions, 5372 flow [2024-06-14 13:05:10,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:10,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:10,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:10,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:05:10,350 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:10,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:10,351 INFO L85 PathProgramCache]: Analyzing trace with hash 511980879, now seen corresponding path program 2 times [2024-06-14 13:05:10,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:10,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936822510] [2024-06-14 13:05:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:10,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:14,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:14,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936822510] [2024-06-14 13:05:14,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936822510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:14,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:14,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:14,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663788782] [2024-06-14 13:05:14,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:14,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:14,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:14,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:14,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:05:14,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 388 transitions, 5372 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:14,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:14,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:05:14,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:16,221 INFO L124 PetriNetUnfolderBase]: 2821/4666 cut-off events. [2024-06-14 13:05:16,221 INFO L125 PetriNetUnfolderBase]: For 213048/213063 co-relation queries the response was YES. [2024-06-14 13:05:16,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31793 conditions, 4666 events. 2821/4666 cut-off events. For 213048/213063 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 29173 event pairs, 583 based on Foata normal form. 15/4677 useless extension candidates. Maximal degree in co-relation 31665. Up to 4089 conditions per place. [2024-06-14 13:05:16,271 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 294 selfloop transitions, 127 changer transitions 0/426 dead transitions. [2024-06-14 13:05:16,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 426 transitions, 6350 flow [2024-06-14 13:05:16,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:16,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:05:16,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:05:16,273 INFO L175 Difference]: Start difference. First operand has 279 places, 388 transitions, 5372 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:05:16,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 426 transitions, 6350 flow [2024-06-14 13:05:16,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 426 transitions, 6086 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 13:05:16,718 INFO L231 Difference]: Finished difference. Result has 282 places, 391 transitions, 5406 flow [2024-06-14 13:05:16,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5108, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5406, PETRI_PLACES=282, PETRI_TRANSITIONS=391} [2024-06-14 13:05:16,719 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-14 13:05:16,719 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 391 transitions, 5406 flow [2024-06-14 13:05:16,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:16,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:16,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:16,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:05:16,719 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:16,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:16,720 INFO L85 PathProgramCache]: Analyzing trace with hash 688160443, now seen corresponding path program 2 times [2024-06-14 13:05:16,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:16,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22225885] [2024-06-14 13:05:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:16,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:20,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:20,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22225885] [2024-06-14 13:05:20,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22225885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:20,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:20,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:20,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119888681] [2024-06-14 13:05:20,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:20,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:20,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:20,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:20,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:20,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:05:20,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 391 transitions, 5406 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:20,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:20,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:05:20,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:21,846 INFO L124 PetriNetUnfolderBase]: 2893/4777 cut-off events. [2024-06-14 13:05:21,846 INFO L125 PetriNetUnfolderBase]: For 228105/228120 co-relation queries the response was YES. [2024-06-14 13:05:21,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33013 conditions, 4777 events. 2893/4777 cut-off events. For 228105/228120 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 29936 event pairs, 575 based on Foata normal form. 16/4789 useless extension candidates. Maximal degree in co-relation 32883. Up to 4004 conditions per place. [2024-06-14 13:05:21,904 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 271 selfloop transitions, 180 changer transitions 0/456 dead transitions. [2024-06-14 13:05:21,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 456 transitions, 7064 flow [2024-06-14 13:05:21,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:05:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:05:21,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-14 13:05:21,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974630021141649 [2024-06-14 13:05:21,906 INFO L175 Difference]: Start difference. First operand has 282 places, 391 transitions, 5406 flow. Second operand 11 states and 188 transitions. [2024-06-14 13:05:21,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 456 transitions, 7064 flow [2024-06-14 13:05:22,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 456 transitions, 6762 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:22,386 INFO L231 Difference]: Finished difference. Result has 286 places, 418 transitions, 5886 flow [2024-06-14 13:05:22,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5140, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5886, PETRI_PLACES=286, PETRI_TRANSITIONS=418} [2024-06-14 13:05:22,387 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-14 13:05:22,387 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 418 transitions, 5886 flow [2024-06-14 13:05:22,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:22,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:22,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:22,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:05:22,387 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:22,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:22,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2011882063, now seen corresponding path program 3 times [2024-06-14 13:05:22,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:22,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797301585] [2024-06-14 13:05:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:22,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:25,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:25,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797301585] [2024-06-14 13:05:25,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797301585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:25,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:25,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:25,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28537369] [2024-06-14 13:05:25,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:25,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:25,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:25,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:25,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:05:25,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 418 transitions, 5886 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:25,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:25,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:05:25,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:27,694 INFO L124 PetriNetUnfolderBase]: 2887/4769 cut-off events. [2024-06-14 13:05:27,695 INFO L125 PetriNetUnfolderBase]: For 231388/231403 co-relation queries the response was YES. [2024-06-14 13:05:27,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33081 conditions, 4769 events. 2887/4769 cut-off events. For 231388/231403 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 29912 event pairs, 574 based on Foata normal form. 16/4781 useless extension candidates. Maximal degree in co-relation 32950. Up to 3999 conditions per place. [2024-06-14 13:05:27,750 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 273 selfloop transitions, 181 changer transitions 0/459 dead transitions. [2024-06-14 13:05:27,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 459 transitions, 7144 flow [2024-06-14 13:05:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:05:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:05:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 213 transitions. [2024-06-14 13:05:27,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3810375670840787 [2024-06-14 13:05:27,751 INFO L175 Difference]: Start difference. First operand has 286 places, 418 transitions, 5886 flow. Second operand 13 states and 213 transitions. [2024-06-14 13:05:27,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 459 transitions, 7144 flow [2024-06-14 13:05:28,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 459 transitions, 6892 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 13:05:28,283 INFO L231 Difference]: Finished difference. Result has 294 places, 418 transitions, 6004 flow [2024-06-14 13:05:28,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6004, PETRI_PLACES=294, PETRI_TRANSITIONS=418} [2024-06-14 13:05:28,284 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-14 13:05:28,284 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 418 transitions, 6004 flow [2024-06-14 13:05:28,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:28,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:28,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:28,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:05:28,284 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:28,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:28,285 INFO L85 PathProgramCache]: Analyzing trace with hash 689112399, now seen corresponding path program 3 times [2024-06-14 13:05:28,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:28,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496645297] [2024-06-14 13:05:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:28,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:32,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:32,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496645297] [2024-06-14 13:05:32,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496645297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:32,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:32,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:32,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427276739] [2024-06-14 13:05:32,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:32,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:32,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:32,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:32,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:32,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:05:32,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 418 transitions, 6004 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:32,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:32,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:05:32,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:34,062 INFO L124 PetriNetUnfolderBase]: 2900/4789 cut-off events. [2024-06-14 13:05:34,063 INFO L125 PetriNetUnfolderBase]: For 239857/239872 co-relation queries the response was YES. [2024-06-14 13:05:34,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33455 conditions, 4789 events. 2900/4789 cut-off events. For 239857/239872 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 30050 event pairs, 588 based on Foata normal form. 15/4800 useless extension candidates. Maximal degree in co-relation 33323. Up to 4172 conditions per place. [2024-06-14 13:05:34,118 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 300 selfloop transitions, 151 changer transitions 0/456 dead transitions. [2024-06-14 13:05:34,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 456 transitions, 7194 flow [2024-06-14 13:05:34,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:05:34,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:05:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 13:05:34,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-14 13:05:34,119 INFO L175 Difference]: Start difference. First operand has 294 places, 418 transitions, 6004 flow. Second operand 10 states and 168 transitions. [2024-06-14 13:05:34,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 456 transitions, 7194 flow [2024-06-14 13:05:34,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 456 transitions, 6808 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 13:05:34,741 INFO L231 Difference]: Finished difference. Result has 295 places, 424 transitions, 6029 flow [2024-06-14 13:05:34,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5618, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6029, PETRI_PLACES=295, PETRI_TRANSITIONS=424} [2024-06-14 13:05:34,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-14 13:05:34,741 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 424 transitions, 6029 flow [2024-06-14 13:05:34,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:34,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:34,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:34,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:05:34,742 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:34,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:34,742 INFO L85 PathProgramCache]: Analyzing trace with hash 992919397, now seen corresponding path program 4 times [2024-06-14 13:05:34,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:34,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386648075] [2024-06-14 13:05:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:34,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:38,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:38,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386648075] [2024-06-14 13:05:38,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386648075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:38,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:38,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:38,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656751169] [2024-06-14 13:05:38,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:38,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:38,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:38,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:38,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:38,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:05:38,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 424 transitions, 6029 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:38,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:38,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:05:38,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:40,266 INFO L124 PetriNetUnfolderBase]: 2936/4842 cut-off events. [2024-06-14 13:05:40,266 INFO L125 PetriNetUnfolderBase]: For 262857/262859 co-relation queries the response was YES. [2024-06-14 13:05:40,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33710 conditions, 4842 events. 2936/4842 cut-off events. For 262857/262859 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 30392 event pairs, 586 based on Foata normal form. 10/4849 useless extension candidates. Maximal degree in co-relation 33576. Up to 4379 conditions per place. [2024-06-14 13:05:40,328 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 399 selfloop transitions, 56 changer transitions 0/460 dead transitions. [2024-06-14 13:05:40,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 460 transitions, 7074 flow [2024-06-14 13:05:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:05:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:05:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-14 13:05:40,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 13:05:40,330 INFO L175 Difference]: Start difference. First operand has 295 places, 424 transitions, 6029 flow. Second operand 12 states and 189 transitions. [2024-06-14 13:05:40,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 460 transitions, 7074 flow [2024-06-14 13:05:40,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 460 transitions, 6757 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:40,986 INFO L231 Difference]: Finished difference. Result has 300 places, 425 transitions, 5842 flow [2024-06-14 13:05:40,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5712, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5842, PETRI_PLACES=300, PETRI_TRANSITIONS=425} [2024-06-14 13:05:40,987 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-14 13:05:40,987 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 425 transitions, 5842 flow [2024-06-14 13:05:40,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:40,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:40,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:40,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:05:40,988 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:40,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash 992592967, now seen corresponding path program 5 times [2024-06-14 13:05:40,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:40,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637628336] [2024-06-14 13:05:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:40,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:44,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:44,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637628336] [2024-06-14 13:05:44,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637628336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:44,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:44,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:44,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927176755] [2024-06-14 13:05:44,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:44,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:44,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:44,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:44,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:44,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:05:44,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 425 transitions, 5842 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:44,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:44,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:05:44,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:46,502 INFO L124 PetriNetUnfolderBase]: 3031/4983 cut-off events. [2024-06-14 13:05:46,502 INFO L125 PetriNetUnfolderBase]: For 285381/285383 co-relation queries the response was YES. [2024-06-14 13:05:46,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34979 conditions, 4983 events. 3031/4983 cut-off events. For 285381/285383 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 31164 event pairs, 595 based on Foata normal form. 8/4988 useless extension candidates. Maximal degree in co-relation 34844. Up to 4411 conditions per place. [2024-06-14 13:05:46,560 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 401 selfloop transitions, 62 changer transitions 0/468 dead transitions. [2024-06-14 13:05:46,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 468 transitions, 7096 flow [2024-06-14 13:05:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:05:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:05:46,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-14 13:05:46,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:05:46,561 INFO L175 Difference]: Start difference. First operand has 300 places, 425 transitions, 5842 flow. Second operand 12 states and 192 transitions. [2024-06-14 13:05:46,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 468 transitions, 7096 flow [2024-06-14 13:05:47,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 468 transitions, 7011 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:05:47,233 INFO L231 Difference]: Finished difference. Result has 305 places, 429 transitions, 5960 flow [2024-06-14 13:05:47,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5757, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5960, PETRI_PLACES=305, PETRI_TRANSITIONS=429} [2024-06-14 13:05:47,233 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-14 13:05:47,233 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 429 transitions, 5960 flow [2024-06-14 13:05:47,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:47,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:47,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:47,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:05:47,234 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:47,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1003644157, now seen corresponding path program 6 times [2024-06-14 13:05:47,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:47,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721073394] [2024-06-14 13:05:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:47,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:50,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:50,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721073394] [2024-06-14 13:05:50,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721073394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:50,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:50,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:50,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310951028] [2024-06-14 13:05:50,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:50,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:50,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:50,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:50,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:50,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:05:50,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 429 transitions, 5960 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:50,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:50,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:05:50,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:52,506 INFO L124 PetriNetUnfolderBase]: 3008/4950 cut-off events. [2024-06-14 13:05:52,506 INFO L125 PetriNetUnfolderBase]: For 278420/278422 co-relation queries the response was YES. [2024-06-14 13:05:52,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34456 conditions, 4950 events. 3008/4950 cut-off events. For 278420/278422 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 31001 event pairs, 596 based on Foata normal form. 10/4957 useless extension candidates. Maximal degree in co-relation 34319. Up to 4491 conditions per place. [2024-06-14 13:05:52,563 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 402 selfloop transitions, 54 changer transitions 0/461 dead transitions. [2024-06-14 13:05:52,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 461 transitions, 6990 flow [2024-06-14 13:05:52,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:05:52,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:05:52,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 13:05:52,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813953488372093 [2024-06-14 13:05:52,565 INFO L175 Difference]: Start difference. First operand has 305 places, 429 transitions, 5960 flow. Second operand 10 states and 164 transitions. [2024-06-14 13:05:52,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 461 transitions, 6990 flow [2024-06-14 13:05:53,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 461 transitions, 6894 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 13:05:53,248 INFO L231 Difference]: Finished difference. Result has 307 places, 429 transitions, 5977 flow [2024-06-14 13:05:53,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5864, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5977, PETRI_PLACES=307, PETRI_TRANSITIONS=429} [2024-06-14 13:05:53,248 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-14 13:05:53,248 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 429 transitions, 5977 flow [2024-06-14 13:05:53,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:53,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:53,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:53,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:05:53,249 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:53,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:53,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1873870649, now seen corresponding path program 4 times [2024-06-14 13:05:53,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:53,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835055111] [2024-06-14 13:05:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:53,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:56,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:56,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835055111] [2024-06-14 13:05:56,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835055111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:56,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:56,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:56,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463659186] [2024-06-14 13:05:56,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:56,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:56,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:56,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:56,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:56,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:05:56,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 429 transitions, 5977 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:56,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:56,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:05:56,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:58,676 INFO L124 PetriNetUnfolderBase]: 3037/4999 cut-off events. [2024-06-14 13:05:58,676 INFO L125 PetriNetUnfolderBase]: For 273852/273862 co-relation queries the response was YES. [2024-06-14 13:05:58,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35136 conditions, 4999 events. 3037/4999 cut-off events. For 273852/273862 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 31381 event pairs, 617 based on Foata normal form. 11/5004 useless extension candidates. Maximal degree in co-relation 34997. Up to 4407 conditions per place. [2024-06-14 13:05:58,730 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 357 selfloop transitions, 128 changer transitions 0/490 dead transitions. [2024-06-14 13:05:58,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 490 transitions, 7519 flow [2024-06-14 13:05:58,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:05:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:05:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-14 13:05:58,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164904862579281 [2024-06-14 13:05:58,732 INFO L175 Difference]: Start difference. First operand has 307 places, 429 transitions, 5977 flow. Second operand 11 states and 197 transitions. [2024-06-14 13:05:58,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 490 transitions, 7519 flow [2024-06-14 13:05:59,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 490 transitions, 7410 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:05:59,575 INFO L231 Difference]: Finished difference. Result has 311 places, 441 transitions, 6322 flow [2024-06-14 13:05:59,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5868, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6322, PETRI_PLACES=311, PETRI_TRANSITIONS=441} [2024-06-14 13:05:59,575 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-14 13:05:59,575 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 441 transitions, 6322 flow [2024-06-14 13:05:59,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:59,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:59,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:59,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:05:59,576 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:59,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash -2087495261, now seen corresponding path program 1 times [2024-06-14 13:05:59,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:59,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414440689] [2024-06-14 13:05:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:59,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:03,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:03,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414440689] [2024-06-14 13:06:03,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414440689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:03,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:03,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:03,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526840002] [2024-06-14 13:06:03,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:03,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:03,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:03,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:03,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:03,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:03,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 441 transitions, 6322 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:03,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:03,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:03,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:05,068 INFO L124 PetriNetUnfolderBase]: 3099/5081 cut-off events. [2024-06-14 13:06:05,069 INFO L125 PetriNetUnfolderBase]: For 293861/293871 co-relation queries the response was YES. [2024-06-14 13:06:05,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36299 conditions, 5081 events. 3099/5081 cut-off events. For 293861/293871 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 31786 event pairs, 616 based on Foata normal form. 12/5087 useless extension candidates. Maximal degree in co-relation 36158. Up to 4492 conditions per place. [2024-06-14 13:06:05,137 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 376 selfloop transitions, 116 changer transitions 0/497 dead transitions. [2024-06-14 13:06:05,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 497 transitions, 7906 flow [2024-06-14 13:06:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:06:05,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:06:05,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-14 13:06:05,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:06:05,139 INFO L175 Difference]: Start difference. First operand has 311 places, 441 transitions, 6322 flow. Second operand 12 states and 200 transitions. [2024-06-14 13:06:05,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 497 transitions, 7906 flow [2024-06-14 13:06:06,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 497 transitions, 7716 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:06,082 INFO L231 Difference]: Finished difference. Result has 318 places, 456 transitions, 6613 flow [2024-06-14 13:06:06,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6132, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6613, PETRI_PLACES=318, PETRI_TRANSITIONS=456} [2024-06-14 13:06:06,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-14 13:06:06,082 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 456 transitions, 6613 flow [2024-06-14 13:06:06,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:06,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:06,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:06,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:06:06,083 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:06,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:06,083 INFO L85 PathProgramCache]: Analyzing trace with hash -209080117, now seen corresponding path program 5 times [2024-06-14 13:06:06,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:06,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163410855] [2024-06-14 13:06:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:06,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:09,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:09,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163410855] [2024-06-14 13:06:09,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163410855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:09,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:09,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:09,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922516748] [2024-06-14 13:06:09,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:09,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:09,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:09,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:09,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:09,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:09,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 456 transitions, 6613 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:09,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:09,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:09,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:11,538 INFO L124 PetriNetUnfolderBase]: 3104/5102 cut-off events. [2024-06-14 13:06:11,538 INFO L125 PetriNetUnfolderBase]: For 300769/300779 co-relation queries the response was YES. [2024-06-14 13:06:11,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37040 conditions, 5102 events. 3104/5102 cut-off events. For 300769/300779 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32128 event pairs, 626 based on Foata normal form. 11/5107 useless extension candidates. Maximal degree in co-relation 36896. Up to 4499 conditions per place. [2024-06-14 13:06:11,601 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 369 selfloop transitions, 124 changer transitions 0/498 dead transitions. [2024-06-14 13:06:11,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 498 transitions, 8032 flow [2024-06-14 13:06:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:06:11,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:06:11,603 INFO L175 Difference]: Start difference. First operand has 318 places, 456 transitions, 6613 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:06:11,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 498 transitions, 8032 flow [2024-06-14 13:06:12,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 498 transitions, 7820 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:12,482 INFO L231 Difference]: Finished difference. Result has 321 places, 459 transitions, 6700 flow [2024-06-14 13:06:12,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6401, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6700, PETRI_PLACES=321, PETRI_TRANSITIONS=459} [2024-06-14 13:06:12,483 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-14 13:06:12,483 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 459 transitions, 6700 flow [2024-06-14 13:06:12,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:12,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:12,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:12,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:06:12,483 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:12,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:12,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1563043331, now seen corresponding path program 6 times [2024-06-14 13:06:12,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:12,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902166902] [2024-06-14 13:06:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:12,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:16,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:16,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902166902] [2024-06-14 13:06:16,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902166902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:16,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:16,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:16,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319009529] [2024-06-14 13:06:16,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:16,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:16,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:16,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:16,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:16,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:16,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 459 transitions, 6700 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:16,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:16,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:16,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:18,517 INFO L124 PetriNetUnfolderBase]: 3109/5111 cut-off events. [2024-06-14 13:06:18,517 INFO L125 PetriNetUnfolderBase]: For 308546/308556 co-relation queries the response was YES. [2024-06-14 13:06:18,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37302 conditions, 5111 events. 3109/5111 cut-off events. For 308546/308556 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32173 event pairs, 624 based on Foata normal form. 11/5116 useless extension candidates. Maximal degree in co-relation 37156. Up to 4505 conditions per place. [2024-06-14 13:06:18,578 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 366 selfloop transitions, 136 changer transitions 0/507 dead transitions. [2024-06-14 13:06:18,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 507 transitions, 8018 flow [2024-06-14 13:06:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:06:18,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:06:18,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-14 13:06:18,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39341085271317827 [2024-06-14 13:06:18,580 INFO L175 Difference]: Start difference. First operand has 321 places, 459 transitions, 6700 flow. Second operand 12 states and 203 transitions. [2024-06-14 13:06:18,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 507 transitions, 8018 flow [2024-06-14 13:06:19,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 507 transitions, 7742 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:19,480 INFO L231 Difference]: Finished difference. Result has 326 places, 462 transitions, 6744 flow [2024-06-14 13:06:19,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6430, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6744, PETRI_PLACES=326, PETRI_TRANSITIONS=462} [2024-06-14 13:06:19,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-14 13:06:19,480 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 462 transitions, 6744 flow [2024-06-14 13:06:19,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:19,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:19,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:19,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:06:19,481 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:19,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:19,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1557502391, now seen corresponding path program 7 times [2024-06-14 13:06:19,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:19,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694716559] [2024-06-14 13:06:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:19,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:23,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:23,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694716559] [2024-06-14 13:06:23,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694716559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:23,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:23,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:23,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911778478] [2024-06-14 13:06:23,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:23,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:23,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:23,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:23,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:23,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:23,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 462 transitions, 6744 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:23,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:23,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:23,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:25,317 INFO L124 PetriNetUnfolderBase]: 3106/5100 cut-off events. [2024-06-14 13:06:25,317 INFO L125 PetriNetUnfolderBase]: For 314208/314221 co-relation queries the response was YES. [2024-06-14 13:06:25,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37323 conditions, 5100 events. 3106/5100 cut-off events. For 314208/314221 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32039 event pairs, 612 based on Foata normal form. 13/5109 useless extension candidates. Maximal degree in co-relation 37176. Up to 4653 conditions per place. [2024-06-14 13:06:25,385 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 412 selfloop transitions, 78 changer transitions 0/495 dead transitions. [2024-06-14 13:06:25,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 495 transitions, 7828 flow [2024-06-14 13:06:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:25,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:25,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:06:25,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 13:06:25,386 INFO L175 Difference]: Start difference. First operand has 326 places, 462 transitions, 6744 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:06:25,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 495 transitions, 7828 flow [2024-06-14 13:06:26,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 495 transitions, 7569 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 13:06:26,319 INFO L231 Difference]: Finished difference. Result has 326 places, 462 transitions, 6649 flow [2024-06-14 13:06:26,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6485, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6649, PETRI_PLACES=326, PETRI_TRANSITIONS=462} [2024-06-14 13:06:26,319 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-14 13:06:26,320 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 462 transitions, 6649 flow [2024-06-14 13:06:26,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:26,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:26,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:26,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:06:26,320 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:26,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:26,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1557502577, now seen corresponding path program 4 times [2024-06-14 13:06:26,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:26,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773438707] [2024-06-14 13:06:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:26,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:29,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:29,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773438707] [2024-06-14 13:06:29,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773438707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:29,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:29,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:29,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398009594] [2024-06-14 13:06:29,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:29,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:29,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:29,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:29,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:29,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:29,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 462 transitions, 6649 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:29,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:29,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:29,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:31,837 INFO L124 PetriNetUnfolderBase]: 3132/5134 cut-off events. [2024-06-14 13:06:31,838 INFO L125 PetriNetUnfolderBase]: For 330025/330038 co-relation queries the response was YES. [2024-06-14 13:06:31,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37676 conditions, 5134 events. 3132/5134 cut-off events. For 330025/330038 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 32182 event pairs, 607 based on Foata normal form. 14/5144 useless extension candidates. Maximal degree in co-relation 37528. Up to 4613 conditions per place. [2024-06-14 13:06:31,909 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 406 selfloop transitions, 97 changer transitions 0/508 dead transitions. [2024-06-14 13:06:31,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 508 transitions, 8003 flow [2024-06-14 13:06:31,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:06:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:06:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-14 13:06:31,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39112050739957716 [2024-06-14 13:06:31,910 INFO L175 Difference]: Start difference. First operand has 326 places, 462 transitions, 6649 flow. Second operand 11 states and 185 transitions. [2024-06-14 13:06:31,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 508 transitions, 8003 flow [2024-06-14 13:06:32,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 508 transitions, 7841 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:32,831 INFO L231 Difference]: Finished difference. Result has 332 places, 468 transitions, 6814 flow [2024-06-14 13:06:32,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6487, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6814, PETRI_PLACES=332, PETRI_TRANSITIONS=468} [2024-06-14 13:06:32,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-14 13:06:32,832 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 468 transitions, 6814 flow [2024-06-14 13:06:32,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:32,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:32,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:32,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:06:32,832 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:32,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:32,833 INFO L85 PathProgramCache]: Analyzing trace with hash 797108269, now seen corresponding path program 2 times [2024-06-14 13:06:32,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:32,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275923805] [2024-06-14 13:06:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:32,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:36,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:36,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275923805] [2024-06-14 13:06:36,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275923805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:36,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:36,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:36,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212019724] [2024-06-14 13:06:36,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:36,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:36,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:36,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:36,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 468 transitions, 6814 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:36,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:36,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:36,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:38,788 INFO L124 PetriNetUnfolderBase]: 3168/5190 cut-off events. [2024-06-14 13:06:38,788 INFO L125 PetriNetUnfolderBase]: For 344111/344124 co-relation queries the response was YES. [2024-06-14 13:06:38,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38415 conditions, 5190 events. 3168/5190 cut-off events. For 344111/344124 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 32624 event pairs, 610 based on Foata normal form. 14/5200 useless extension candidates. Maximal degree in co-relation 38265. Up to 4712 conditions per place. [2024-06-14 13:06:38,848 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 425 selfloop transitions, 84 changer transitions 0/514 dead transitions. [2024-06-14 13:06:38,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 514 transitions, 8189 flow [2024-06-14 13:06:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:06:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:06:38,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-14 13:06:38,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.374031007751938 [2024-06-14 13:06:38,850 INFO L175 Difference]: Start difference. First operand has 332 places, 468 transitions, 6814 flow. Second operand 12 states and 193 transitions. [2024-06-14 13:06:38,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 514 transitions, 8189 flow [2024-06-14 13:06:39,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 514 transitions, 7983 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 13:06:39,838 INFO L231 Difference]: Finished difference. Result has 336 places, 477 transitions, 6899 flow [2024-06-14 13:06:39,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6616, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6899, PETRI_PLACES=336, PETRI_TRANSITIONS=477} [2024-06-14 13:06:39,839 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-14 13:06:39,839 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 477 transitions, 6899 flow [2024-06-14 13:06:39,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:39,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:39,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:39,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:06:39,839 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)] === [2024-06-14 13:06:39,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:39,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2083776563, now seen corresponding path program 8 times [2024-06-14 13:06:39,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:39,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648335773] [2024-06-14 13:06:39,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:39,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:43,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:43,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648335773] [2024-06-14 13:06:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648335773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:43,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:43,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:43,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656062989] [2024-06-14 13:06:43,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:43,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:43,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:43,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:43,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:43,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:43,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 477 transitions, 6899 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:43,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:43,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:43,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:45,785 INFO L124 PetriNetUnfolderBase]: 3191/5242 cut-off events. [2024-06-14 13:06:45,786 INFO L125 PetriNetUnfolderBase]: For 352203/352216 co-relation queries the response was YES. [2024-06-14 13:06:45,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38833 conditions, 5242 events. 3191/5242 cut-off events. For 352203/352216 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 33083 event pairs, 626 based on Foata normal form. 13/5251 useless extension candidates. Maximal degree in co-relation 38683. Up to 4755 conditions per place. [2024-06-14 13:06:45,858 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 426 selfloop transitions, 94 changer transitions 0/525 dead transitions. [2024-06-14 13:06:45,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 525 transitions, 8398 flow [2024-06-14 13:06:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:06:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:06:45,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-14 13:06:45,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38054968287526425 [2024-06-14 13:06:45,860 INFO L175 Difference]: Start difference. First operand has 336 places, 477 transitions, 6899 flow. Second operand 11 states and 180 transitions. [2024-06-14 13:06:45,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 525 transitions, 8398 flow [2024-06-14 13:06:47,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 525 transitions, 8277 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:47,073 INFO L231 Difference]: Finished difference. Result has 341 places, 489 transitions, 7205 flow [2024-06-14 13:06:47,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6778, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7205, PETRI_PLACES=341, PETRI_TRANSITIONS=489} [2024-06-14 13:06:47,073 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-14 13:06:47,073 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 489 transitions, 7205 flow [2024-06-14 13:06:47,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:47,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:47,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:47,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:06:47,074 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)] === [2024-06-14 13:06:47,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:47,074 INFO L85 PathProgramCache]: Analyzing trace with hash 797113663, now seen corresponding path program 5 times [2024-06-14 13:06:47,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:47,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195263224] [2024-06-14 13:06:47,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:47,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:50,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:50,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195263224] [2024-06-14 13:06:50,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195263224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:50,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:50,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:50,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356762999] [2024-06-14 13:06:50,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:50,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:50,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:50,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:50,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 489 transitions, 7205 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:50,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:50,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:50,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:53,116 INFO L124 PetriNetUnfolderBase]: 3217/5270 cut-off events. [2024-06-14 13:06:53,116 INFO L125 PetriNetUnfolderBase]: For 370270/370283 co-relation queries the response was YES. [2024-06-14 13:06:53,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39545 conditions, 5270 events. 3217/5270 cut-off events. For 370270/370283 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 33151 event pairs, 608 based on Foata normal form. 14/5280 useless extension candidates. Maximal degree in co-relation 39392. Up to 4706 conditions per place. [2024-06-14 13:06:53,187 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 423 selfloop transitions, 113 changer transitions 0/541 dead transitions. [2024-06-14 13:06:53,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 541 transitions, 8793 flow [2024-06-14 13:06:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:06:53,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:06:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 224 transitions. [2024-06-14 13:06:53,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:06:53,189 INFO L175 Difference]: Start difference. First operand has 341 places, 489 transitions, 7205 flow. Second operand 14 states and 224 transitions. [2024-06-14 13:06:53,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 541 transitions, 8793 flow [2024-06-14 13:06:54,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 541 transitions, 8631 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:54,446 INFO L231 Difference]: Finished difference. Result has 349 places, 495 transitions, 7369 flow [2024-06-14 13:06:54,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7043, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7369, PETRI_PLACES=349, PETRI_TRANSITIONS=495} [2024-06-14 13:06:54,446 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-14 13:06:54,446 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 495 transitions, 7369 flow [2024-06-14 13:06:54,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:54,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:54,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:54,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:06:54,447 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)] === [2024-06-14 13:06:54,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash -2083770611, now seen corresponding path program 3 times [2024-06-14 13:06:54,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:54,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040967042] [2024-06-14 13:06:54,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:54,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:57,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:57,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040967042] [2024-06-14 13:06:57,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040967042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:57,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:57,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:57,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875886148] [2024-06-14 13:06:57,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:57,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:57,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:57,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:57,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:57,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 495 transitions, 7369 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:57,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:57,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:57,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:00,260 INFO L124 PetriNetUnfolderBase]: 3211/5260 cut-off events. [2024-06-14 13:07:00,261 INFO L125 PetriNetUnfolderBase]: For 374615/374628 co-relation queries the response was YES. [2024-06-14 13:07:00,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39582 conditions, 5260 events. 3211/5260 cut-off events. For 374615/374628 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 33087 event pairs, 611 based on Foata normal form. 14/5270 useless extension candidates. Maximal degree in co-relation 39428. Up to 4775 conditions per place. [2024-06-14 13:07:00,323 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 443 selfloop transitions, 84 changer transitions 0/532 dead transitions. [2024-06-14 13:07:00,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 532 transitions, 8527 flow [2024-06-14 13:07:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:07:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:07:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-14 13:07:00,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3631484794275492 [2024-06-14 13:07:00,324 INFO L175 Difference]: Start difference. First operand has 349 places, 495 transitions, 7369 flow. Second operand 13 states and 203 transitions. [2024-06-14 13:07:00,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 532 transitions, 8527 flow [2024-06-14 13:07:01,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 532 transitions, 8287 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-14 13:07:01,576 INFO L231 Difference]: Finished difference. Result has 352 places, 495 transitions, 7303 flow [2024-06-14 13:07:01,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7129, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7303, PETRI_PLACES=352, PETRI_TRANSITIONS=495} [2024-06-14 13:07:01,577 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-14 13:07:01,577 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 495 transitions, 7303 flow [2024-06-14 13:07:01,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:01,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:01,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:01,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:07:01,577 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:01,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:01,578 INFO L85 PathProgramCache]: Analyzing trace with hash -199705531, now seen corresponding path program 6 times [2024-06-14 13:07:01,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:01,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578999281] [2024-06-14 13:07:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:01,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:05,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:05,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578999281] [2024-06-14 13:07:05,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578999281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:05,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:05,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:05,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385295146] [2024-06-14 13:07:05,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:05,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:05,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:05,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:05,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:05,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:05,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 495 transitions, 7303 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:05,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:05,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:05,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:07,529 INFO L124 PetriNetUnfolderBase]: 3205/5248 cut-off events. [2024-06-14 13:07:07,529 INFO L125 PetriNetUnfolderBase]: For 377653/377666 co-relation queries the response was YES. [2024-06-14 13:07:07,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39362 conditions, 5248 events. 3205/5248 cut-off events. For 377653/377666 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 32988 event pairs, 607 based on Foata normal form. 14/5258 useless extension candidates. Maximal degree in co-relation 39207. Up to 4693 conditions per place. [2024-06-14 13:07:07,599 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 426 selfloop transitions, 110 changer transitions 0/541 dead transitions. [2024-06-14 13:07:07,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 541 transitions, 8655 flow [2024-06-14 13:07:07,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:07:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:07:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 226 transitions. [2024-06-14 13:07:07,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-14 13:07:07,601 INFO L175 Difference]: Start difference. First operand has 352 places, 495 transitions, 7303 flow. Second operand 14 states and 226 transitions. [2024-06-14 13:07:07,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 541 transitions, 8655 flow [2024-06-14 13:07:08,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 541 transitions, 8456 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-14 13:07:08,891 INFO L231 Difference]: Finished difference. Result has 354 places, 495 transitions, 7331 flow [2024-06-14 13:07:08,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7104, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7331, PETRI_PLACES=354, PETRI_TRANSITIONS=495} [2024-06-14 13:07:08,891 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-14 13:07:08,891 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 495 transitions, 7331 flow [2024-06-14 13:07:08,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:08,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:08,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:08,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:07:08,892 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:08,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:08,892 INFO L85 PathProgramCache]: Analyzing trace with hash -199705717, now seen corresponding path program 9 times [2024-06-14 13:07:08,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:08,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868053539] [2024-06-14 13:07:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:08,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:12,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:12,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868053539] [2024-06-14 13:07:12,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868053539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:12,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:12,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:12,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112981409] [2024-06-14 13:07:12,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:12,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:12,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:12,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:12,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:12,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:12,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 495 transitions, 7331 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:12,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:12,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:12,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:14,819 INFO L124 PetriNetUnfolderBase]: 3202/5262 cut-off events. [2024-06-14 13:07:14,819 INFO L125 PetriNetUnfolderBase]: For 380380/380393 co-relation queries the response was YES. [2024-06-14 13:07:14,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39442 conditions, 5262 events. 3202/5262 cut-off events. For 380380/380393 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 33253 event pairs, 623 based on Foata normal form. 13/5271 useless extension candidates. Maximal degree in co-relation 39286. Up to 4772 conditions per place. [2024-06-14 13:07:14,877 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 433 selfloop transitions, 94 changer transitions 0/532 dead transitions. [2024-06-14 13:07:14,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 532 transitions, 8497 flow [2024-06-14 13:07:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:07:14,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:07:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 203 transitions. [2024-06-14 13:07:14,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3631484794275492 [2024-06-14 13:07:14,878 INFO L175 Difference]: Start difference. First operand has 354 places, 495 transitions, 7331 flow. Second operand 13 states and 203 transitions. [2024-06-14 13:07:14,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 532 transitions, 8497 flow [2024-06-14 13:07:16,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 532 transitions, 8256 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-14 13:07:16,247 INFO L231 Difference]: Finished difference. Result has 355 places, 495 transitions, 7285 flow [2024-06-14 13:07:16,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7090, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7285, PETRI_PLACES=355, PETRI_TRANSITIONS=495} [2024-06-14 13:07:16,247 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-14 13:07:16,247 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 495 transitions, 7285 flow [2024-06-14 13:07:16,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:16,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:16,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:16,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:07:16,248 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:16,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:16,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2137348273, now seen corresponding path program 10 times [2024-06-14 13:07:16,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:16,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070670618] [2024-06-14 13:07:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:16,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:19,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:19,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070670618] [2024-06-14 13:07:19,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070670618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:19,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:19,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:19,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897295263] [2024-06-14 13:07:19,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:19,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:19,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:19,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:19,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:20,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:20,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 495 transitions, 7285 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:20,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:20,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:20,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:22,232 INFO L124 PetriNetUnfolderBase]: 3246/5325 cut-off events. [2024-06-14 13:07:22,232 INFO L125 PetriNetUnfolderBase]: For 399437/399442 co-relation queries the response was YES. [2024-06-14 13:07:22,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40224 conditions, 5325 events. 3246/5325 cut-off events. For 399437/399442 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 33667 event pairs, 633 based on Foata normal form. 3/5324 useless extension candidates. Maximal degree in co-relation 40067. Up to 4619 conditions per place. [2024-06-14 13:07:22,295 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 346 selfloop transitions, 190 changer transitions 0/541 dead transitions. [2024-06-14 13:07:22,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 541 transitions, 9086 flow [2024-06-14 13:07:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:07:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:07:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-14 13:07:22,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699788583509514 [2024-06-14 13:07:22,297 INFO L175 Difference]: Start difference. First operand has 355 places, 495 transitions, 7285 flow. Second operand 11 states and 175 transitions. [2024-06-14 13:07:22,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 541 transitions, 9086 flow [2024-06-14 13:07:23,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 541 transitions, 8845 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-14 13:07:23,691 INFO L231 Difference]: Finished difference. Result has 354 places, 516 transitions, 7836 flow [2024-06-14 13:07:23,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7050, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7836, PETRI_PLACES=354, PETRI_TRANSITIONS=516} [2024-06-14 13:07:23,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 310 predicate places. [2024-06-14 13:07:23,691 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 516 transitions, 7836 flow [2024-06-14 13:07:23,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:23,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:23,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:23,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:07:23,692 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:23,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash 996410059, now seen corresponding path program 4 times [2024-06-14 13:07:23,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:23,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171966292] [2024-06-14 13:07:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:23,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:27,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:27,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171966292] [2024-06-14 13:07:27,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171966292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:27,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:27,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:27,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406437681] [2024-06-14 13:07:27,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:27,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:27,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:27,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:27,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:27,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:27,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 516 transitions, 7836 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:27,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:27,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:27,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:29,511 INFO L124 PetriNetUnfolderBase]: 3288/5386 cut-off events. [2024-06-14 13:07:29,511 INFO L125 PetriNetUnfolderBase]: For 425702/425717 co-relation queries the response was YES. [2024-06-14 13:07:29,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41308 conditions, 5386 events. 3288/5386 cut-off events. For 425702/425717 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 34069 event pairs, 615 based on Foata normal form. 16/5398 useless extension candidates. Maximal degree in co-relation 41149. Up to 4842 conditions per place. [2024-06-14 13:07:29,589 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 459 selfloop transitions, 96 changer transitions 0/560 dead transitions. [2024-06-14 13:07:29,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 560 transitions, 9478 flow [2024-06-14 13:07:29,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:07:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:07:29,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 205 transitions. [2024-06-14 13:07:29,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667262969588551 [2024-06-14 13:07:29,590 INFO L175 Difference]: Start difference. First operand has 354 places, 516 transitions, 7836 flow. Second operand 13 states and 205 transitions. [2024-06-14 13:07:29,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 560 transitions, 9478 flow [2024-06-14 13:07:30,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 560 transitions, 9131 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:30,983 INFO L231 Difference]: Finished difference. Result has 363 places, 525 transitions, 7846 flow [2024-06-14 13:07:30,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7489, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7846, PETRI_PLACES=363, PETRI_TRANSITIONS=525} [2024-06-14 13:07:30,984 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-14 13:07:30,984 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 525 transitions, 7846 flow [2024-06-14 13:07:30,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:30,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:30,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:30,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:07:30,984 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:30,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:30,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1003647133, now seen corresponding path program 7 times [2024-06-14 13:07:30,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:30,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822297824] [2024-06-14 13:07:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:30,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:34,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:34,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822297824] [2024-06-14 13:07:34,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822297824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:34,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:34,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:34,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597511452] [2024-06-14 13:07:34,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:34,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:34,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:34,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:34,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:34,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:34,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 525 transitions, 7846 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:34,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:34,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:34,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:36,260 INFO L124 PetriNetUnfolderBase]: 3378/5519 cut-off events. [2024-06-14 13:07:36,260 INFO L125 PetriNetUnfolderBase]: For 468594/468599 co-relation queries the response was YES. [2024-06-14 13:07:36,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42866 conditions, 5519 events. 3378/5519 cut-off events. For 468594/468599 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 35034 event pairs, 628 based on Foata normal form. 4/5519 useless extension candidates. Maximal degree in co-relation 42705. Up to 4601 conditions per place. [2024-06-14 13:07:36,324 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 350 selfloop transitions, 217 changer transitions 0/572 dead transitions. [2024-06-14 13:07:36,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 572 transitions, 9810 flow [2024-06-14 13:07:36,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:07:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:07:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 13:07:36,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-14 13:07:36,326 INFO L175 Difference]: Start difference. First operand has 363 places, 525 transitions, 7846 flow. Second operand 10 states and 171 transitions. [2024-06-14 13:07:36,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 572 transitions, 9810 flow [2024-06-14 13:07:37,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 572 transitions, 9609 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 13:07:37,998 INFO L231 Difference]: Finished difference. Result has 365 places, 543 transitions, 8369 flow [2024-06-14 13:07:37,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7645, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8369, PETRI_PLACES=365, PETRI_TRANSITIONS=543} [2024-06-14 13:07:37,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-14 13:07:37,998 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 543 transitions, 8369 flow [2024-06-14 13:07:37,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:37,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:37,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:37,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:07:37,999 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:37,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:38,000 INFO L85 PathProgramCache]: Analyzing trace with hash 996415639, now seen corresponding path program 5 times [2024-06-14 13:07:38,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:38,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783099454] [2024-06-14 13:07:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:38,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:41,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:41,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783099454] [2024-06-14 13:07:41,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783099454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:41,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:41,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:41,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403562711] [2024-06-14 13:07:41,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:41,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:41,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:41,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:41,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:41,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:41,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 543 transitions, 8369 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:41,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:41,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:41,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:44,127 INFO L124 PetriNetUnfolderBase]: 3398/5546 cut-off events. [2024-06-14 13:07:44,127 INFO L125 PetriNetUnfolderBase]: For 482098/482113 co-relation queries the response was YES. [2024-06-14 13:07:44,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43560 conditions, 5546 events. 3398/5546 cut-off events. For 482098/482113 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 35144 event pairs, 624 based on Foata normal form. 16/5558 useless extension candidates. Maximal degree in co-relation 43398. Up to 4982 conditions per place. [2024-06-14 13:07:44,205 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 481 selfloop transitions, 102 changer transitions 0/588 dead transitions. [2024-06-14 13:07:44,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 588 transitions, 10038 flow [2024-06-14 13:07:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:07:44,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:07:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 231 transitions. [2024-06-14 13:07:44,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3581395348837209 [2024-06-14 13:07:44,207 INFO L175 Difference]: Start difference. First operand has 365 places, 543 transitions, 8369 flow. Second operand 15 states and 231 transitions. [2024-06-14 13:07:44,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 588 transitions, 10038 flow [2024-06-14 13:07:46,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 588 transitions, 9696 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:46,096 INFO L231 Difference]: Finished difference. Result has 375 places, 549 transitions, 8320 flow [2024-06-14 13:07:46,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8029, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8320, PETRI_PLACES=375, PETRI_TRANSITIONS=549} [2024-06-14 13:07:46,097 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-14 13:07:46,097 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 549 transitions, 8320 flow [2024-06-14 13:07:46,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:46,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:46,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:46,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:07:46,097 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)] === [2024-06-14 13:07:46,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:46,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1532100465, now seen corresponding path program 8 times [2024-06-14 13:07:46,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:46,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981042082] [2024-06-14 13:07:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:46,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:49,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:49,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981042082] [2024-06-14 13:07:49,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981042082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:49,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:49,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:49,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766352569] [2024-06-14 13:07:49,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:49,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:49,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:49,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:49,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:49,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:49,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 549 transitions, 8320 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:49,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:49,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:49,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:52,068 INFO L124 PetriNetUnfolderBase]: 3392/5532 cut-off events. [2024-06-14 13:07:52,069 INFO L125 PetriNetUnfolderBase]: For 485118/485133 co-relation queries the response was YES. [2024-06-14 13:07:52,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43165 conditions, 5532 events. 3392/5532 cut-off events. For 485118/485133 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 34941 event pairs, 624 based on Foata normal form. 16/5544 useless extension candidates. Maximal degree in co-relation 43002. Up to 5012 conditions per place. [2024-06-14 13:07:52,149 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 487 selfloop transitions, 89 changer transitions 0/581 dead transitions. [2024-06-14 13:07:52,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 581 transitions, 9720 flow [2024-06-14 13:07:52,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:07:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:07:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 190 transitions. [2024-06-14 13:07:52,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682170542635659 [2024-06-14 13:07:52,150 INFO L175 Difference]: Start difference. First operand has 375 places, 549 transitions, 8320 flow. Second operand 12 states and 190 transitions. [2024-06-14 13:07:52,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 581 transitions, 9720 flow [2024-06-14 13:07:54,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 581 transitions, 9492 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-14 13:07:54,056 INFO L231 Difference]: Finished difference. Result has 375 places, 549 transitions, 8277 flow [2024-06-14 13:07:54,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8092, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8277, PETRI_PLACES=375, PETRI_TRANSITIONS=549} [2024-06-14 13:07:54,057 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-14 13:07:54,057 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 549 transitions, 8277 flow [2024-06-14 13:07:54,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:54,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:54,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:54,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:07:54,057 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:54,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1003767103, now seen corresponding path program 9 times [2024-06-14 13:07:54,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:54,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301219096] [2024-06-14 13:07:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:54,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:57,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:57,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301219096] [2024-06-14 13:07:57,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301219096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:57,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:57,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:07:57,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508655502] [2024-06-14 13:07:57,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:57,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:07:57,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:57,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:07:57,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:07:57,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:57,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 549 transitions, 8277 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:57,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:57,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:57,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:59,846 INFO L124 PetriNetUnfolderBase]: 3402/5552 cut-off events. [2024-06-14 13:07:59,846 INFO L125 PetriNetUnfolderBase]: For 496311/496326 co-relation queries the response was YES. [2024-06-14 13:07:59,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43329 conditions, 5552 events. 3402/5552 cut-off events. For 496311/496326 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 35155 event pairs, 625 based on Foata normal form. 16/5564 useless extension candidates. Maximal degree in co-relation 43165. Up to 5047 conditions per place. [2024-06-14 13:07:59,916 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 496 selfloop transitions, 79 changer transitions 0/580 dead transitions. [2024-06-14 13:07:59,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 580 transitions, 9564 flow [2024-06-14 13:07:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:07:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:07:59,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-14 13:07:59,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906976744186044 [2024-06-14 13:07:59,917 INFO L175 Difference]: Start difference. First operand has 375 places, 549 transitions, 8277 flow. Second operand 10 states and 163 transitions. [2024-06-14 13:07:59,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 580 transitions, 9564 flow [2024-06-14 13:08:01,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 580 transitions, 9375 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 13:08:01,882 INFO L231 Difference]: Finished difference. Result has 376 places, 552 transitions, 8317 flow [2024-06-14 13:08:01,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8091, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8317, PETRI_PLACES=376, PETRI_TRANSITIONS=552} [2024-06-14 13:08:01,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-14 13:08:01,882 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 552 transitions, 8317 flow [2024-06-14 13:08:01,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:01,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:01,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:01,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:08:01,883 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:01,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:01,883 INFO L85 PathProgramCache]: Analyzing trace with hash 992922373, now seen corresponding path program 10 times [2024-06-14 13:08:01,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:01,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405318515] [2024-06-14 13:08:01,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:01,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:05,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:05,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405318515] [2024-06-14 13:08:05,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405318515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:05,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:05,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:05,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210156717] [2024-06-14 13:08:05,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:05,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:05,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:05,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:05,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:05,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:05,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 552 transitions, 8317 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:05,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:05,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:05,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:07,369 INFO L124 PetriNetUnfolderBase]: 3412/5573 cut-off events. [2024-06-14 13:08:07,370 INFO L125 PetriNetUnfolderBase]: For 506450/506455 co-relation queries the response was YES. [2024-06-14 13:08:07,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43507 conditions, 5573 events. 3412/5573 cut-off events. For 506450/506455 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35389 event pairs, 629 based on Foata normal form. 4/5573 useless extension candidates. Maximal degree in co-relation 43342. Up to 4636 conditions per place. [2024-06-14 13:08:07,453 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 349 selfloop transitions, 234 changer transitions 0/588 dead transitions. [2024-06-14 13:08:07,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 588 transitions, 10271 flow [2024-06-14 13:08:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:08:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:08:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-14 13:08:07,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856589147286822 [2024-06-14 13:08:07,454 INFO L175 Difference]: Start difference. First operand has 376 places, 552 transitions, 8317 flow. Second operand 12 states and 199 transitions. [2024-06-14 13:08:07,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 588 transitions, 10271 flow [2024-06-14 13:08:09,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 588 transitions, 10091 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 13:08:09,552 INFO L231 Difference]: Finished difference. Result has 380 places, 555 transitions, 8655 flow [2024-06-14 13:08:09,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8137, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8655, PETRI_PLACES=380, PETRI_TRANSITIONS=555} [2024-06-14 13:08:09,553 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-14 13:08:09,553 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 555 transitions, 8655 flow [2024-06-14 13:08:09,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:09,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:09,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:09,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:08:09,553 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:09,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:09,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1003767289, now seen corresponding path program 6 times [2024-06-14 13:08:09,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:09,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266318644] [2024-06-14 13:08:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:09,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:12,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:12,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266318644] [2024-06-14 13:08:12,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266318644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:12,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:12,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:12,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146587571] [2024-06-14 13:08:12,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:12,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:12,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:12,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:12,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:13,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:13,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 555 transitions, 8655 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:13,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:13,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:13,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:15,315 INFO L124 PetriNetUnfolderBase]: 3406/5564 cut-off events. [2024-06-14 13:08:15,315 INFO L125 PetriNetUnfolderBase]: For 514081/514096 co-relation queries the response was YES. [2024-06-14 13:08:15,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43882 conditions, 5564 events. 3406/5564 cut-off events. For 514081/514096 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35286 event pairs, 623 based on Foata normal form. 16/5576 useless extension candidates. Maximal degree in co-relation 43716. Up to 4997 conditions per place. [2024-06-14 13:08:15,388 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 479 selfloop transitions, 103 changer transitions 0/587 dead transitions. [2024-06-14 13:08:15,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 587 transitions, 10073 flow [2024-06-14 13:08:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:08:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:08:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-14 13:08:15,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 13:08:15,390 INFO L175 Difference]: Start difference. First operand has 380 places, 555 transitions, 8655 flow. Second operand 12 states and 189 transitions. [2024-06-14 13:08:15,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 587 transitions, 10073 flow [2024-06-14 13:08:17,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 587 transitions, 9503 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-14 13:08:17,713 INFO L231 Difference]: Finished difference. Result has 382 places, 555 transitions, 8297 flow [2024-06-14 13:08:17,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8085, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8297, PETRI_PLACES=382, PETRI_TRANSITIONS=555} [2024-06-14 13:08:17,713 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-14 13:08:17,713 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 555 transitions, 8297 flow [2024-06-14 13:08:17,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:17,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:17,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:17,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:08:17,714 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:17,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:17,714 INFO L85 PathProgramCache]: Analyzing trace with hash 992685223, now seen corresponding path program 11 times [2024-06-14 13:08:17,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:17,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705039419] [2024-06-14 13:08:17,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:17,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:21,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:21,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705039419] [2024-06-14 13:08:21,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705039419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:21,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:21,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:21,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419382265] [2024-06-14 13:08:21,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:21,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:21,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:21,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:21,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:21,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:21,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 555 transitions, 8297 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:21,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:21,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:21,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:23,408 INFO L124 PetriNetUnfolderBase]: 3400/5555 cut-off events. [2024-06-14 13:08:23,409 INFO L125 PetriNetUnfolderBase]: For 513667/513672 co-relation queries the response was YES. [2024-06-14 13:08:23,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43261 conditions, 5555 events. 3400/5555 cut-off events. For 513667/513672 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35288 event pairs, 627 based on Foata normal form. 4/5555 useless extension candidates. Maximal degree in co-relation 43094. Up to 4623 conditions per place. [2024-06-14 13:08:23,487 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 347 selfloop transitions, 236 changer transitions 0/588 dead transitions. [2024-06-14 13:08:23,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 588 transitions, 10053 flow [2024-06-14 13:08:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:08:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:08:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 209 transitions. [2024-06-14 13:08:23,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3738819320214669 [2024-06-14 13:08:23,488 INFO L175 Difference]: Start difference. First operand has 382 places, 555 transitions, 8297 flow. Second operand 13 states and 209 transitions. [2024-06-14 13:08:23,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 588 transitions, 10053 flow [2024-06-14 13:08:25,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 588 transitions, 9863 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 13:08:25,703 INFO L231 Difference]: Finished difference. Result has 385 places, 555 transitions, 8586 flow [2024-06-14 13:08:25,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8107, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8586, PETRI_PLACES=385, PETRI_TRANSITIONS=555} [2024-06-14 13:08:25,704 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-14 13:08:25,704 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 555 transitions, 8586 flow [2024-06-14 13:08:25,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:25,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:25,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:25,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:08:25,704 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:25,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:25,705 INFO L85 PathProgramCache]: Analyzing trace with hash 996415453, now seen corresponding path program 12 times [2024-06-14 13:08:25,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:25,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290517379] [2024-06-14 13:08:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:25,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:29,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:29,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290517379] [2024-06-14 13:08:29,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290517379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:29,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:29,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:29,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332489363] [2024-06-14 13:08:29,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:29,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:29,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:29,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:29,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:29,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:29,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 555 transitions, 8586 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:29,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:29,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:29,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:31,688 INFO L124 PetriNetUnfolderBase]: 3394/5542 cut-off events. [2024-06-14 13:08:31,689 INFO L125 PetriNetUnfolderBase]: For 520335/520350 co-relation queries the response was YES. [2024-06-14 13:08:31,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43598 conditions, 5542 events. 3394/5542 cut-off events. For 520335/520350 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35171 event pairs, 622 based on Foata normal form. 16/5554 useless extension candidates. Maximal degree in co-relation 43430. Up to 5015 conditions per place. [2024-06-14 13:08:31,762 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 493 selfloop transitions, 92 changer transitions 0/590 dead transitions. [2024-06-14 13:08:31,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 590 transitions, 9848 flow [2024-06-14 13:08:31,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:08:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:08:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 215 transitions. [2024-06-14 13:08:31,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:08:31,763 INFO L175 Difference]: Start difference. First operand has 385 places, 555 transitions, 8586 flow. Second operand 14 states and 215 transitions. [2024-06-14 13:08:31,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 590 transitions, 9848 flow [2024-06-14 13:08:33,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 590 transitions, 9369 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-14 13:08:33,751 INFO L231 Difference]: Finished difference. Result has 389 places, 555 transitions, 8297 flow [2024-06-14 13:08:33,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8107, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8297, PETRI_PLACES=389, PETRI_TRANSITIONS=555} [2024-06-14 13:08:33,751 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-14 13:08:33,751 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 555 transitions, 8297 flow [2024-06-14 13:08:33,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:33,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:33,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:33,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:08:33,752 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:33,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:33,752 INFO L85 PathProgramCache]: Analyzing trace with hash 996409687, now seen corresponding path program 11 times [2024-06-14 13:08:33,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:33,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911071323] [2024-06-14 13:08:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:33,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:37,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:37,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911071323] [2024-06-14 13:08:37,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911071323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:37,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:37,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:37,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989170740] [2024-06-14 13:08:37,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:37,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:37,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:37,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:37,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:37,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:37,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 555 transitions, 8297 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:37,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:37,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:37,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:39,713 INFO L124 PetriNetUnfolderBase]: 3391/5558 cut-off events. [2024-06-14 13:08:39,713 INFO L125 PetriNetUnfolderBase]: For 520116/520131 co-relation queries the response was YES. [2024-06-14 13:08:39,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43137 conditions, 5558 events. 3391/5558 cut-off events. For 520116/520131 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35444 event pairs, 648 based on Foata normal form. 15/5569 useless extension candidates. Maximal degree in co-relation 42968. Up to 5073 conditions per place. [2024-06-14 13:08:39,795 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 502 selfloop transitions, 75 changer transitions 0/582 dead transitions. [2024-06-14 13:08:39,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 582 transitions, 9701 flow [2024-06-14 13:08:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:08:39,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:08:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-06-14 13:08:39,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35271317829457366 [2024-06-14 13:08:39,796 INFO L175 Difference]: Start difference. First operand has 389 places, 555 transitions, 8297 flow. Second operand 12 states and 182 transitions. [2024-06-14 13:08:39,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 582 transitions, 9701 flow [2024-06-14 13:08:42,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 582 transitions, 9531 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 13:08:42,248 INFO L231 Difference]: Finished difference. Result has 390 places, 555 transitions, 8283 flow [2024-06-14 13:08:42,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8127, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8283, PETRI_PLACES=390, PETRI_TRANSITIONS=555} [2024-06-14 13:08:42,249 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 346 predicate places. [2024-06-14 13:08:42,249 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 555 transitions, 8283 flow [2024-06-14 13:08:42,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:42,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:42,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:42,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:08:42,249 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:42,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:42,250 INFO L85 PathProgramCache]: Analyzing trace with hash 996404107, now seen corresponding path program 12 times [2024-06-14 13:08:42,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:42,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387879529] [2024-06-14 13:08:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:42,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:45,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:45,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387879529] [2024-06-14 13:08:45,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387879529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:45,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:45,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:45,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013874019] [2024-06-14 13:08:45,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:45,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:45,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:45,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:45,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:45,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:45,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 555 transitions, 8283 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:45,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:45,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:45,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:48,199 INFO L124 PetriNetUnfolderBase]: 3388/5554 cut-off events. [2024-06-14 13:08:48,199 INFO L125 PetriNetUnfolderBase]: For 526910/526925 co-relation queries the response was YES. [2024-06-14 13:08:48,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43077 conditions, 5554 events. 3388/5554 cut-off events. For 526910/526925 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 35390 event pairs, 648 based on Foata normal form. 15/5565 useless extension candidates. Maximal degree in co-relation 42907. Up to 5070 conditions per place. [2024-06-14 13:08:48,272 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 500 selfloop transitions, 75 changer transitions 0/580 dead transitions. [2024-06-14 13:08:48,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 580 transitions, 9505 flow [2024-06-14 13:08:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:08:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:08:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 170 transitions. [2024-06-14 13:08:48,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3594080338266385 [2024-06-14 13:08:48,273 INFO L175 Difference]: Start difference. First operand has 390 places, 555 transitions, 8283 flow. Second operand 11 states and 170 transitions. [2024-06-14 13:08:48,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 580 transitions, 9505 flow [2024-06-14 13:08:50,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 580 transitions, 9320 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-14 13:08:50,853 INFO L231 Difference]: Finished difference. Result has 392 places, 555 transitions, 8255 flow [2024-06-14 13:08:50,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8098, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8255, PETRI_PLACES=392, PETRI_TRANSITIONS=555} [2024-06-14 13:08:50,854 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-14 13:08:50,854 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 555 transitions, 8255 flow [2024-06-14 13:08:50,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:50,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:50,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:50,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:08:50,854 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:50,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:50,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1004043871, now seen corresponding path program 1 times [2024-06-14 13:08:50,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:50,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268847676] [2024-06-14 13:08:50,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:50,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:54,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:54,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268847676] [2024-06-14 13:08:54,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268847676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:54,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:54,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:08:54,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055496502] [2024-06-14 13:08:54,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:54,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:08:54,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:08:54,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:08:54,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:54,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 555 transitions, 8255 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 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) [2024-06-14 13:08:54,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:54,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:54,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:56,727 INFO L124 PetriNetUnfolderBase]: 3408/5575 cut-off events. [2024-06-14 13:08:56,727 INFO L125 PetriNetUnfolderBase]: For 557592/557594 co-relation queries the response was YES. [2024-06-14 13:08:56,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43299 conditions, 5575 events. 3408/5575 cut-off events. For 557592/557594 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 35373 event pairs, 617 based on Foata normal form. 6/5578 useless extension candidates. Maximal degree in co-relation 43128. Up to 4938 conditions per place. [2024-06-14 13:08:56,810 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 529 selfloop transitions, 58 changer transitions 0/592 dead transitions. [2024-06-14 13:08:56,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 592 transitions, 9593 flow [2024-06-14 13:08:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:08:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:08:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 13:08:56,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:08:56,811 INFO L175 Difference]: Start difference. First operand has 392 places, 555 transitions, 8255 flow. Second operand 10 states and 165 transitions. [2024-06-14 13:08:56,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 592 transitions, 9593 flow [2024-06-14 13:08:59,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 592 transitions, 9443 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 13:08:59,605 INFO L231 Difference]: Finished difference. Result has 393 places, 558 transitions, 8267 flow [2024-06-14 13:08:59,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8105, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8267, PETRI_PLACES=393, PETRI_TRANSITIONS=558} [2024-06-14 13:08:59,605 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-14 13:08:59,605 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 558 transitions, 8267 flow [2024-06-14 13:08:59,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 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) [2024-06-14 13:08:59,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:59,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:59,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:08:59,606 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:59,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1340699143, now seen corresponding path program 7 times [2024-06-14 13:08:59,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:59,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666396686] [2024-06-14 13:08:59,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:59,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:03,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:03,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666396686] [2024-06-14 13:09:03,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666396686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:03,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:03,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:03,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272769952] [2024-06-14 13:09:03,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:03,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:03,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:03,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:03,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:03,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:03,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 558 transitions, 8267 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:03,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:03,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:03,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:05,016 INFO L124 PetriNetUnfolderBase]: 3444/5639 cut-off events. [2024-06-14 13:09:05,016 INFO L125 PetriNetUnfolderBase]: For 587088/587098 co-relation queries the response was YES. [2024-06-14 13:09:05,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43941 conditions, 5639 events. 3444/5639 cut-off events. For 587088/587098 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35973 event pairs, 624 based on Foata normal form. 20/5656 useless extension candidates. Maximal degree in co-relation 43768. Up to 5024 conditions per place. [2024-06-14 13:09:05,099 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 535 selfloop transitions, 60 changer transitions 0/600 dead transitions. [2024-06-14 13:09:05,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 600 transitions, 9624 flow [2024-06-14 13:09:05,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:09:05,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:09:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-14 13:09:05,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930232558139535 [2024-06-14 13:09:05,101 INFO L175 Difference]: Start difference. First operand has 393 places, 558 transitions, 8267 flow. Second operand 10 states and 169 transitions. [2024-06-14 13:09:05,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 600 transitions, 9624 flow [2024-06-14 13:09:08,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 600 transitions, 9548 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:08,094 INFO L231 Difference]: Finished difference. Result has 397 places, 559 transitions, 8339 flow [2024-06-14 13:09:08,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8191, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8339, PETRI_PLACES=397, PETRI_TRANSITIONS=559} [2024-06-14 13:09:08,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-14 13:09:08,094 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 559 transitions, 8339 flow [2024-06-14 13:09:08,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:08,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:08,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:08,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:09:08,095 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:08,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:08,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1351423903, now seen corresponding path program 8 times [2024-06-14 13:09:08,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:08,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737894693] [2024-06-14 13:09:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:08,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:11,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:11,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737894693] [2024-06-14 13:09:11,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737894693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:11,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:11,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:11,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19924445] [2024-06-14 13:09:11,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:11,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:11,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:11,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:11,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:11,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:11,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 559 transitions, 8339 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:11,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:11,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:11,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:13,271 INFO L124 PetriNetUnfolderBase]: 3467/5668 cut-off events. [2024-06-14 13:09:13,272 INFO L125 PetriNetUnfolderBase]: For 592082/592084 co-relation queries the response was YES. [2024-06-14 13:09:13,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44367 conditions, 5668 events. 3467/5668 cut-off events. For 592082/592084 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 36048 event pairs, 638 based on Foata normal form. 10/5675 useless extension candidates. Maximal degree in co-relation 44192. Up to 5103 conditions per place. [2024-06-14 13:09:13,357 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 530 selfloop transitions, 54 changer transitions 0/589 dead transitions. [2024-06-14 13:09:13,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 589 transitions, 9638 flow [2024-06-14 13:09:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:09:13,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 13:09:13,358 INFO L175 Difference]: Start difference. First operand has 397 places, 559 transitions, 8339 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:09:13,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 589 transitions, 9638 flow [2024-06-14 13:09:15,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 589 transitions, 9514 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 13:09:15,184 INFO L231 Difference]: Finished difference. Result has 396 places, 560 transitions, 8350 flow [2024-06-14 13:09:15,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8350, PETRI_PLACES=396, PETRI_TRANSITIONS=560} [2024-06-14 13:09:15,185 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-14 13:09:15,185 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 560 transitions, 8350 flow [2024-06-14 13:09:15,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:15,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:15,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:15,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:09:15,185 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)] === [2024-06-14 13:09:15,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:15,186 INFO L85 PathProgramCache]: Analyzing trace with hash 791353933, now seen corresponding path program 9 times [2024-06-14 13:09:15,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:15,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778761222] [2024-06-14 13:09:15,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:15,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:18,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:18,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778761222] [2024-06-14 13:09:18,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778761222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:18,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:18,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:18,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496523107] [2024-06-14 13:09:18,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:18,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:18,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:18,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:18,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:18,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:18,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 560 transitions, 8350 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:18,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:18,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:18,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:20,668 INFO L124 PetriNetUnfolderBase]: 3477/5697 cut-off events. [2024-06-14 13:09:20,668 INFO L125 PetriNetUnfolderBase]: For 564777/564788 co-relation queries the response was YES. [2024-06-14 13:09:20,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43938 conditions, 5697 events. 3477/5697 cut-off events. For 564777/564788 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 36366 event pairs, 642 based on Foata normal form. 12/5696 useless extension candidates. Maximal degree in co-relation 43763. Up to 5141 conditions per place. [2024-06-14 13:09:20,752 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 521 selfloop transitions, 58 changer transitions 0/584 dead transitions. [2024-06-14 13:09:20,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 584 transitions, 9616 flow [2024-06-14 13:09:20,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:09:20,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 13:09:20,753 INFO L175 Difference]: Start difference. First operand has 396 places, 560 transitions, 8350 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:09:20,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 584 transitions, 9616 flow [2024-06-14 13:09:22,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 584 transitions, 9498 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 13:09:22,913 INFO L231 Difference]: Finished difference. Result has 396 places, 561 transitions, 8367 flow [2024-06-14 13:09:22,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8232, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8367, PETRI_PLACES=396, PETRI_TRANSITIONS=561} [2024-06-14 13:09:22,914 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-14 13:09:22,914 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 561 transitions, 8367 flow [2024-06-14 13:09:22,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:22,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:22,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:22,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:09:22,914 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)] === [2024-06-14 13:09:22,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:22,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1317717379, now seen corresponding path program 10 times [2024-06-14 13:09:22,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:22,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682906473] [2024-06-14 13:09:22,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:22,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:26,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:26,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682906473] [2024-06-14 13:09:26,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682906473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:26,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:26,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:26,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992335899] [2024-06-14 13:09:26,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:26,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:26,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:26,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:26,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:26,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:26,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 561 transitions, 8367 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:26,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:26,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:26,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:28,302 INFO L124 PetriNetUnfolderBase]: 3459/5676 cut-off events. [2024-06-14 13:09:28,302 INFO L125 PetriNetUnfolderBase]: For 522672/522682 co-relation queries the response was YES. [2024-06-14 13:09:28,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43026 conditions, 5676 events. 3459/5676 cut-off events. For 522672/522682 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 36243 event pairs, 498 based on Foata normal form. 18/5691 useless extension candidates. Maximal degree in co-relation 42852. Up to 4705 conditions per place. [2024-06-14 13:09:28,386 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 522 selfloop transitions, 82 changer transitions 0/609 dead transitions. [2024-06-14 13:09:28,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 609 transitions, 9761 flow [2024-06-14 13:09:28,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:09:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:09:28,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:09:28,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-14 13:09:28,388 INFO L175 Difference]: Start difference. First operand has 396 places, 561 transitions, 8367 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:09:28,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 609 transitions, 9761 flow [2024-06-14 13:09:30,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 609 transitions, 9630 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:30,547 INFO L231 Difference]: Finished difference. Result has 400 places, 561 transitions, 8413 flow [2024-06-14 13:09:30,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8236, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8413, PETRI_PLACES=400, PETRI_TRANSITIONS=561} [2024-06-14 13:09:30,547 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-14 13:09:30,547 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 561 transitions, 8413 flow [2024-06-14 13:09:30,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:30,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:30,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:30,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:09:30,548 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)] === [2024-06-14 13:09:30,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:30,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1897739017, now seen corresponding path program 13 times [2024-06-14 13:09:30,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:30,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021238860] [2024-06-14 13:09:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:30,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:34,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:34,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021238860] [2024-06-14 13:09:34,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021238860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:34,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:34,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:34,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268747724] [2024-06-14 13:09:34,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:34,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:34,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:34,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:34,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:34,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:34,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 561 transitions, 8413 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:34,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:34,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:34,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:36,517 INFO L124 PetriNetUnfolderBase]: 3480/5710 cut-off events. [2024-06-14 13:09:36,517 INFO L125 PetriNetUnfolderBase]: For 514153/514165 co-relation queries the response was YES. [2024-06-14 13:09:36,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43743 conditions, 5710 events. 3480/5710 cut-off events. For 514153/514165 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 36631 event pairs, 665 based on Foata normal form. 13/5717 useless extension candidates. Maximal degree in co-relation 43568. Up to 4848 conditions per place. [2024-06-14 13:09:36,639 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 388 selfloop transitions, 213 changer transitions 0/606 dead transitions. [2024-06-14 13:09:36,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 606 transitions, 10237 flow [2024-06-14 13:09:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 13:09:36,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 13:09:36,641 INFO L175 Difference]: Start difference. First operand has 400 places, 561 transitions, 8413 flow. Second operand 8 states and 152 transitions. [2024-06-14 13:09:36,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 606 transitions, 10237 flow [2024-06-14 13:09:38,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 606 transitions, 10051 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-14 13:09:38,990 INFO L231 Difference]: Finished difference. Result has 397 places, 570 transitions, 8825 flow [2024-06-14 13:09:38,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8239, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8825, PETRI_PLACES=397, PETRI_TRANSITIONS=570} [2024-06-14 13:09:38,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-14 13:09:38,990 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 570 transitions, 8825 flow [2024-06-14 13:09:38,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:38,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:38,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:38,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:09:38,991 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)] === [2024-06-14 13:09:38,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:38,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2037480073, now seen corresponding path program 14 times [2024-06-14 13:09:38,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:38,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607630661] [2024-06-14 13:09:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:38,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:42,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:42,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607630661] [2024-06-14 13:09:42,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607630661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:42,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:42,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:42,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399082872] [2024-06-14 13:09:42,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:42,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:42,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:42,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:42,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:42,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:42,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 570 transitions, 8825 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:42,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:42,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:42,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:44,519 INFO L124 PetriNetUnfolderBase]: 3477/5699 cut-off events. [2024-06-14 13:09:44,519 INFO L125 PetriNetUnfolderBase]: For 490605/490620 co-relation queries the response was YES. [2024-06-14 13:09:44,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43507 conditions, 5699 events. 3477/5699 cut-off events. For 490605/490620 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 36506 event pairs, 651 based on Foata normal form. 15/5710 useless extension candidates. Maximal degree in co-relation 43334. Up to 5080 conditions per place. [2024-06-14 13:09:44,611 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 463 selfloop transitions, 132 changer transitions 0/600 dead transitions. [2024-06-14 13:09:44,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 600 transitions, 10107 flow [2024-06-14 13:09:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:09:44,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:09:44,612 INFO L175 Difference]: Start difference. First operand has 397 places, 570 transitions, 8825 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:09:44,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 600 transitions, 10107 flow [2024-06-14 13:09:46,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 600 transitions, 9653 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:46,707 INFO L231 Difference]: Finished difference. Result has 399 places, 570 transitions, 8649 flow [2024-06-14 13:09:46,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8371, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8649, PETRI_PLACES=399, PETRI_TRANSITIONS=570} [2024-06-14 13:09:46,707 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-14 13:09:46,707 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 570 transitions, 8649 flow [2024-06-14 13:09:46,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:46,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:46,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:46,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:09:46,708 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:46,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:46,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1839378935, now seen corresponding path program 13 times [2024-06-14 13:09:46,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:46,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540485890] [2024-06-14 13:09:46,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:46,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:49,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:49,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540485890] [2024-06-14 13:09:49,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540485890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:49,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:49,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:49,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147622618] [2024-06-14 13:09:49,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:49,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:49,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:49,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:49,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:49,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:49,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 570 transitions, 8649 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:49,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:49,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:49,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:52,355 INFO L124 PetriNetUnfolderBase]: 3497/5731 cut-off events. [2024-06-14 13:09:52,355 INFO L125 PetriNetUnfolderBase]: For 494027/494042 co-relation queries the response was YES. [2024-06-14 13:09:52,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43467 conditions, 5731 events. 3497/5731 cut-off events. For 494027/494042 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 36726 event pairs, 612 based on Foata normal form. 16/5743 useless extension candidates. Maximal degree in co-relation 43294. Up to 4932 conditions per place. [2024-06-14 13:09:52,441 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 415 selfloop transitions, 192 changer transitions 0/612 dead transitions. [2024-06-14 13:09:52,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 612 transitions, 10233 flow [2024-06-14 13:09:52,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:09:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:09:52,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 13:09:52,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-14 13:09:52,443 INFO L175 Difference]: Start difference. First operand has 399 places, 570 transitions, 8649 flow. Second operand 10 states and 174 transitions. [2024-06-14 13:09:52,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 612 transitions, 10233 flow [2024-06-14 13:09:54,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 612 transitions, 9895 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 13:09:54,408 INFO L231 Difference]: Finished difference. Result has 403 places, 576 transitions, 8903 flow [2024-06-14 13:09:54,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8313, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8903, PETRI_PLACES=403, PETRI_TRANSITIONS=576} [2024-06-14 13:09:54,409 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-14 13:09:54,409 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 576 transitions, 8903 flow [2024-06-14 13:09:54,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:54,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:54,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:54,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:09:54,409 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:54,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:54,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1834136711, now seen corresponding path program 15 times [2024-06-14 13:09:54,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:54,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263995945] [2024-06-14 13:09:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:54,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:57,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:57,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263995945] [2024-06-14 13:09:57,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263995945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:57,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:57,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:57,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064291582] [2024-06-14 13:09:57,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:57,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:57,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:57,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:57,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:57,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:57,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 576 transitions, 8903 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:57,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:57,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:57,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:00,588 INFO L124 PetriNetUnfolderBase]: 3510/5754 cut-off events. [2024-06-14 13:10:00,588 INFO L125 PetriNetUnfolderBase]: For 495264/495276 co-relation queries the response was YES. [2024-06-14 13:10:00,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44138 conditions, 5754 events. 3510/5754 cut-off events. For 495264/495276 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 36897 event pairs, 665 based on Foata normal form. 13/5761 useless extension candidates. Maximal degree in co-relation 43963. Up to 4888 conditions per place. [2024-06-14 13:10:00,674 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 393 selfloop transitions, 231 changer transitions 0/629 dead transitions. [2024-06-14 13:10:00,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 629 transitions, 10923 flow [2024-06-14 13:10:00,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:10:00,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:10:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 13:10:00,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-14 13:10:00,676 INFO L175 Difference]: Start difference. First operand has 403 places, 576 transitions, 8903 flow. Second operand 10 states and 187 transitions. [2024-06-14 13:10:00,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 629 transitions, 10923 flow [2024-06-14 13:10:02,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 629 transitions, 10611 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:02,716 INFO L231 Difference]: Finished difference. Result has 406 places, 582 transitions, 9169 flow [2024-06-14 13:10:02,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8597, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9169, PETRI_PLACES=406, PETRI_TRANSITIONS=582} [2024-06-14 13:10:02,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-14 13:10:02,716 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 582 transitions, 9169 flow [2024-06-14 13:10:02,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:02,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:02,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:02,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:10:02,716 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:02,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:02,717 INFO L85 PathProgramCache]: Analyzing trace with hash -265970395, now seen corresponding path program 16 times [2024-06-14 13:10:02,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:02,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376253057] [2024-06-14 13:10:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:02,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:06,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:06,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376253057] [2024-06-14 13:10:06,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376253057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:06,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:06,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:06,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779478676] [2024-06-14 13:10:06,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:06,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:06,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:06,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:06,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:06,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:06,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 582 transitions, 9169 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:06,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:06,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:06,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:08,594 INFO L124 PetriNetUnfolderBase]: 3515/5772 cut-off events. [2024-06-14 13:10:08,595 INFO L125 PetriNetUnfolderBase]: For 498156/498208 co-relation queries the response was YES. [2024-06-14 13:10:08,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44339 conditions, 5772 events. 3515/5772 cut-off events. For 498156/498208 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 37147 event pairs, 682 based on Foata normal form. 37/5797 useless extension candidates. Maximal degree in co-relation 44163. Up to 4894 conditions per place. [2024-06-14 13:10:08,680 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 392 selfloop transitions, 231 changer transitions 0/628 dead transitions. [2024-06-14 13:10:08,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 628 transitions, 10955 flow [2024-06-14 13:10:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:10:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:10:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 13:10:08,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:10:08,681 INFO L175 Difference]: Start difference. First operand has 406 places, 582 transitions, 9169 flow. Second operand 10 states and 180 transitions. [2024-06-14 13:10:08,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 628 transitions, 10955 flow [2024-06-14 13:10:10,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 628 transitions, 10429 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-14 13:10:10,918 INFO L231 Difference]: Finished difference. Result has 408 places, 585 transitions, 9171 flow [2024-06-14 13:10:10,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8659, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9171, PETRI_PLACES=408, PETRI_TRANSITIONS=585} [2024-06-14 13:10:10,918 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-14 13:10:10,919 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 585 transitions, 9171 flow [2024-06-14 13:10:10,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:10,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:10,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:10,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:10:10,919 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:10,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:10,919 INFO L85 PathProgramCache]: Analyzing trace with hash 616041977, now seen corresponding path program 17 times [2024-06-14 13:10:10,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:10,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337624891] [2024-06-14 13:10:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:10,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:14,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:14,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337624891] [2024-06-14 13:10:14,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337624891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:14,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:14,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:14,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206330851] [2024-06-14 13:10:14,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:14,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:14,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:14,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:14,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:14,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 585 transitions, 9171 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:14,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:14,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:14,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:17,346 INFO L124 PetriNetUnfolderBase]: 3520/5772 cut-off events. [2024-06-14 13:10:17,346 INFO L125 PetriNetUnfolderBase]: For 496058/496070 co-relation queries the response was YES. [2024-06-14 13:10:17,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44319 conditions, 5772 events. 3520/5772 cut-off events. For 496058/496070 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 37096 event pairs, 665 based on Foata normal form. 13/5779 useless extension candidates. Maximal degree in co-relation 44143. Up to 4900 conditions per place. [2024-06-14 13:10:17,431 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 385 selfloop transitions, 241 changer transitions 0/631 dead transitions. [2024-06-14 13:10:17,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 631 transitions, 10953 flow [2024-06-14 13:10:17,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:10:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:10:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-14 13:10:17,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080338266384778 [2024-06-14 13:10:17,433 INFO L175 Difference]: Start difference. First operand has 408 places, 585 transitions, 9171 flow. Second operand 11 states and 193 transitions. [2024-06-14 13:10:17,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 631 transitions, 10953 flow [2024-06-14 13:10:19,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 631 transitions, 10351 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 13:10:19,670 INFO L231 Difference]: Finished difference. Result has 411 places, 588 transitions, 9109 flow [2024-06-14 13:10:19,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8575, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9109, PETRI_PLACES=411, PETRI_TRANSITIONS=588} [2024-06-14 13:10:19,670 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-14 13:10:19,670 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 588 transitions, 9109 flow [2024-06-14 13:10:19,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:19,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:19,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:19,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:10:19,671 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:19,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1833837809, now seen corresponding path program 7 times [2024-06-14 13:10:19,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:19,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727395215] [2024-06-14 13:10:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:19,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:22,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:22,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727395215] [2024-06-14 13:10:22,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727395215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:22,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:22,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:22,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891213069] [2024-06-14 13:10:22,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:22,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:22,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:22,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:22,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:23,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:23,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 588 transitions, 9109 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:23,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:23,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:23,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:25,145 INFO L124 PetriNetUnfolderBase]: 3546/5799 cut-off events. [2024-06-14 13:10:25,145 INFO L125 PetriNetUnfolderBase]: For 518743/518755 co-relation queries the response was YES. [2024-06-14 13:10:25,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44776 conditions, 5799 events. 3546/5799 cut-off events. For 518743/518755 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 37168 event pairs, 642 based on Foata normal form. 14/5807 useless extension candidates. Maximal degree in co-relation 44599. Up to 5071 conditions per place. [2024-06-14 13:10:25,225 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 470 selfloop transitions, 152 changer transitions 0/627 dead transitions. [2024-06-14 13:10:25,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 627 transitions, 10905 flow [2024-06-14 13:10:25,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:10:25,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:10:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 13:10:25,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:10:25,227 INFO L175 Difference]: Start difference. First operand has 411 places, 588 transitions, 9109 flow. Second operand 10 states and 170 transitions. [2024-06-14 13:10:25,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 627 transitions, 10905 flow [2024-06-14 13:10:27,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 627 transitions, 10472 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-14 13:10:27,130 INFO L231 Difference]: Finished difference. Result has 412 places, 594 transitions, 9094 flow [2024-06-14 13:10:27,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8680, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9094, PETRI_PLACES=412, PETRI_TRANSITIONS=594} [2024-06-14 13:10:27,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-14 13:10:27,131 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 594 transitions, 9094 flow [2024-06-14 13:10:27,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:27,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:27,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:27,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:10:27,131 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:27,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash 922222647, now seen corresponding path program 18 times [2024-06-14 13:10:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:27,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381522599] [2024-06-14 13:10:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:27,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:30,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:30,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381522599] [2024-06-14 13:10:30,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381522599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:30,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:30,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:30,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941645353] [2024-06-14 13:10:30,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:30,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:30,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:30,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:30,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:30,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:30,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 594 transitions, 9094 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:30,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:30,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:30,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:33,313 INFO L124 PetriNetUnfolderBase]: 3543/5809 cut-off events. [2024-06-14 13:10:33,313 INFO L125 PetriNetUnfolderBase]: For 507424/507439 co-relation queries the response was YES. [2024-06-14 13:10:33,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44529 conditions, 5809 events. 3543/5809 cut-off events. For 507424/507439 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37280 event pairs, 654 based on Foata normal form. 15/5820 useless extension candidates. Maximal degree in co-relation 44352. Up to 5132 conditions per place. [2024-06-14 13:10:33,392 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 462 selfloop transitions, 162 changer transitions 0/629 dead transitions. [2024-06-14 13:10:33,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 629 transitions, 10624 flow [2024-06-14 13:10:33,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:10:33,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:10:33,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 195 transitions. [2024-06-14 13:10:33,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 13:10:33,393 INFO L175 Difference]: Start difference. First operand has 412 places, 594 transitions, 9094 flow. Second operand 12 states and 195 transitions. [2024-06-14 13:10:33,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 629 transitions, 10624 flow [2024-06-14 13:10:35,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 629 transitions, 10346 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:35,491 INFO L231 Difference]: Finished difference. Result has 417 places, 594 transitions, 9159 flow [2024-06-14 13:10:35,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8818, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9159, PETRI_PLACES=417, PETRI_TRANSITIONS=594} [2024-06-14 13:10:35,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-14 13:10:35,491 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 594 transitions, 9159 flow [2024-06-14 13:10:35,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:35,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:35,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:35,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:10:35,492 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:35,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:35,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1830124505, now seen corresponding path program 14 times [2024-06-14 13:10:35,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:35,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697986815] [2024-06-14 13:10:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:35,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:38,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:38,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697986815] [2024-06-14 13:10:38,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697986815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:38,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:38,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:38,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027439835] [2024-06-14 13:10:38,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:38,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:38,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:38,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:38,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:38,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 594 transitions, 9159 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:38,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:38,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:38,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:41,625 INFO L124 PetriNetUnfolderBase]: 3537/5795 cut-off events. [2024-06-14 13:10:41,625 INFO L125 PetriNetUnfolderBase]: For 504524/504539 co-relation queries the response was YES. [2024-06-14 13:10:41,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44267 conditions, 5795 events. 3537/5795 cut-off events. For 504524/504539 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 37173 event pairs, 616 based on Foata normal form. 16/5807 useless extension candidates. Maximal degree in co-relation 44090. Up to 4991 conditions per place. [2024-06-14 13:10:41,701 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 438 selfloop transitions, 192 changer transitions 0/635 dead transitions. [2024-06-14 13:10:41,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 635 transitions, 10893 flow [2024-06-14 13:10:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:10:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:10:41,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 217 transitions. [2024-06-14 13:10:41,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3881932021466905 [2024-06-14 13:10:41,703 INFO L175 Difference]: Start difference. First operand has 417 places, 594 transitions, 9159 flow. Second operand 13 states and 217 transitions. [2024-06-14 13:10:41,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 635 transitions, 10893 flow [2024-06-14 13:10:43,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 635 transitions, 10476 flow, removed 26 selfloop flow, removed 12 redundant places. [2024-06-14 13:10:43,729 INFO L231 Difference]: Finished difference. Result has 418 places, 594 transitions, 9156 flow [2024-06-14 13:10:43,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8750, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9156, PETRI_PLACES=418, PETRI_TRANSITIONS=594} [2024-06-14 13:10:43,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-14 13:10:43,730 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 594 transitions, 9156 flow [2024-06-14 13:10:43,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:43,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:43,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:43,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:10:43,730 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:43,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:43,730 INFO L85 PathProgramCache]: Analyzing trace with hash 936130173, now seen corresponding path program 19 times [2024-06-14 13:10:43,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:43,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560203964] [2024-06-14 13:10:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:43,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:46,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:46,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:46,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560203964] [2024-06-14 13:10:46,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560203964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:46,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:46,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:46,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083956206] [2024-06-14 13:10:46,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:46,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:46,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:46,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:46,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:46,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 594 transitions, 9156 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:46,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:46,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:46,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:49,695 INFO L124 PetriNetUnfolderBase]: 3542/5810 cut-off events. [2024-06-14 13:10:49,695 INFO L125 PetriNetUnfolderBase]: For 493369/493421 co-relation queries the response was YES. [2024-06-14 13:10:49,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44307 conditions, 5810 events. 3542/5810 cut-off events. For 493369/493421 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 37336 event pairs, 680 based on Foata normal form. 37/5835 useless extension candidates. Maximal degree in co-relation 44131. Up to 4931 conditions per place. [2024-06-14 13:10:49,781 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 399 selfloop transitions, 238 changer transitions 0/642 dead transitions. [2024-06-14 13:10:49,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 642 transitions, 10948 flow [2024-06-14 13:10:49,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:10:49,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:10:49,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 204 transitions. [2024-06-14 13:10:49,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:10:49,782 INFO L175 Difference]: Start difference. First operand has 418 places, 594 transitions, 9156 flow. Second operand 12 states and 204 transitions. [2024-06-14 13:10:49,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 642 transitions, 10948 flow [2024-06-14 13:10:51,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 642 transitions, 10517 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-14 13:10:51,777 INFO L231 Difference]: Finished difference. Result has 416 places, 597 transitions, 9245 flow [2024-06-14 13:10:51,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8733, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9245, PETRI_PLACES=416, PETRI_TRANSITIONS=597} [2024-06-14 13:10:51,777 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-14 13:10:51,777 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 597 transitions, 9245 flow [2024-06-14 13:10:51,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:51,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:51,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:51,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:10:51,778 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:51,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:51,779 INFO L85 PathProgramCache]: Analyzing trace with hash 928340559, now seen corresponding path program 8 times [2024-06-14 13:10:51,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:51,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116720661] [2024-06-14 13:10:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:51,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:54,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:54,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116720661] [2024-06-14 13:10:54,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116720661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:54,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:54,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:54,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617745431] [2024-06-14 13:10:54,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:54,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:54,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:54,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:54,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:54,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:54,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 597 transitions, 9245 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:54,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:54,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:54,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:56,918 INFO L124 PetriNetUnfolderBase]: 3552/5829 cut-off events. [2024-06-14 13:10:56,918 INFO L125 PetriNetUnfolderBase]: For 487500/487552 co-relation queries the response was YES. [2024-06-14 13:10:56,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44299 conditions, 5829 events. 3552/5829 cut-off events. For 487500/487552 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 37506 event pairs, 689 based on Foata normal form. 38/5855 useless extension candidates. Maximal degree in co-relation 44124. Up to 5233 conditions per place. [2024-06-14 13:10:57,009 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 525 selfloop transitions, 97 changer transitions 0/627 dead transitions. [2024-06-14 13:10:57,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 627 transitions, 10790 flow [2024-06-14 13:10:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:10:57,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-14 13:10:57,011 INFO L175 Difference]: Start difference. First operand has 416 places, 597 transitions, 9245 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:10:57,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 627 transitions, 10790 flow [2024-06-14 13:10:59,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 627 transitions, 10296 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-14 13:10:59,252 INFO L231 Difference]: Finished difference. Result has 415 places, 600 transitions, 8998 flow [2024-06-14 13:10:59,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8751, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8998, PETRI_PLACES=415, PETRI_TRANSITIONS=600} [2024-06-14 13:10:59,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-14 13:10:59,252 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 600 transitions, 8998 flow [2024-06-14 13:10:59,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:59,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:59,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:59,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:10:59,253 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:59,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:59,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1155197263, now seen corresponding path program 15 times [2024-06-14 13:10:59,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:59,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313379357] [2024-06-14 13:10:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:59,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:02,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:02,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313379357] [2024-06-14 13:11:02,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313379357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:02,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:02,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:02,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720693501] [2024-06-14 13:11:02,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:02,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:02,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:02,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:02,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:02,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:02,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 600 transitions, 8998 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:02,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:02,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:02,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:04,950 INFO L124 PetriNetUnfolderBase]: 3546/5800 cut-off events. [2024-06-14 13:11:04,950 INFO L125 PetriNetUnfolderBase]: For 485622/485637 co-relation queries the response was YES. [2024-06-14 13:11:05,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43742 conditions, 5800 events. 3546/5800 cut-off events. For 485622/485637 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 37127 event pairs, 612 based on Foata normal form. 16/5812 useless extension candidates. Maximal degree in co-relation 43566. Up to 5007 conditions per place. [2024-06-14 13:11:05,039 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 440 selfloop transitions, 192 changer transitions 0/637 dead transitions. [2024-06-14 13:11:05,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 637 transitions, 10546 flow [2024-06-14 13:11:05,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:11:05,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:11:05,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-14 13:11:05,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39957716701902746 [2024-06-14 13:11:05,040 INFO L175 Difference]: Start difference. First operand has 415 places, 600 transitions, 8998 flow. Second operand 11 states and 189 transitions. [2024-06-14 13:11:05,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 637 transitions, 10546 flow [2024-06-14 13:11:07,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 637 transitions, 10250 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:07,197 INFO L231 Difference]: Finished difference. Result has 419 places, 600 transitions, 9104 flow [2024-06-14 13:11:07,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8702, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9104, PETRI_PLACES=419, PETRI_TRANSITIONS=600} [2024-06-14 13:11:07,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-14 13:11:07,197 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 600 transitions, 9104 flow [2024-06-14 13:11:07,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:07,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:07,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:07,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:11:07,198 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:07,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:07,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2028220063, now seen corresponding path program 20 times [2024-06-14 13:11:07,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:07,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175635440] [2024-06-14 13:11:07,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:07,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:10,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:10,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175635440] [2024-06-14 13:11:10,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175635440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:10,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:10,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:10,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626812920] [2024-06-14 13:11:10,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:10,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:10,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:10,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:10,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:10,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:10,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 600 transitions, 9104 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:10,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:10,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:10,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:13,117 INFO L124 PetriNetUnfolderBase]: 3543/5804 cut-off events. [2024-06-14 13:11:13,117 INFO L125 PetriNetUnfolderBase]: For 487723/487738 co-relation queries the response was YES. [2024-06-14 13:11:13,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43996 conditions, 5804 events. 3543/5804 cut-off events. For 487723/487738 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 37207 event pairs, 648 based on Foata normal form. 15/5815 useless extension candidates. Maximal degree in co-relation 43819. Up to 5134 conditions per place. [2024-06-14 13:11:13,205 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 465 selfloop transitions, 162 changer transitions 0/632 dead transitions. [2024-06-14 13:11:13,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 632 transitions, 10454 flow [2024-06-14 13:11:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:13,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-14 13:11:13,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930232558139535 [2024-06-14 13:11:13,207 INFO L175 Difference]: Start difference. First operand has 419 places, 600 transitions, 9104 flow. Second operand 10 states and 169 transitions. [2024-06-14 13:11:13,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 632 transitions, 10454 flow [2024-06-14 13:11:15,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 632 transitions, 10081 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-14 13:11:15,206 INFO L231 Difference]: Finished difference. Result has 418 places, 600 transitions, 9069 flow [2024-06-14 13:11:15,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8731, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9069, PETRI_PLACES=418, PETRI_TRANSITIONS=600} [2024-06-14 13:11:15,206 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-14 13:11:15,206 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 600 transitions, 9069 flow [2024-06-14 13:11:15,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:15,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:15,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:15,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:11:15,207 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)] === [2024-06-14 13:11:15,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:15,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1290393585, now seen corresponding path program 9 times [2024-06-14 13:11:15,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:15,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549722419] [2024-06-14 13:11:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:15,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:18,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:18,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549722419] [2024-06-14 13:11:18,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549722419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:18,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:18,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:18,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968225811] [2024-06-14 13:11:18,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:18,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:18,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:18,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:18,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:18,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 600 transitions, 9069 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:18,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:18,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:18,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:20,341 INFO L124 PetriNetUnfolderBase]: 3553/5827 cut-off events. [2024-06-14 13:11:20,341 INFO L125 PetriNetUnfolderBase]: For 485292/485344 co-relation queries the response was YES. [2024-06-14 13:11:20,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43854 conditions, 5827 events. 3553/5827 cut-off events. For 485292/485344 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 37489 event pairs, 684 based on Foata normal form. 38/5853 useless extension candidates. Maximal degree in co-relation 43678. Up to 5246 conditions per place. [2024-06-14 13:11:20,413 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 523 selfloop transitions, 95 changer transitions 0/623 dead transitions. [2024-06-14 13:11:20,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 623 transitions, 10404 flow [2024-06-14 13:11:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:11:20,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 13:11:20,415 INFO L175 Difference]: Start difference. First operand has 418 places, 600 transitions, 9069 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:11:20,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 623 transitions, 10404 flow [2024-06-14 13:11:22,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 623 transitions, 10074 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-14 13:11:22,436 INFO L231 Difference]: Finished difference. Result has 416 places, 603 transitions, 8980 flow [2024-06-14 13:11:22,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8739, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8980, PETRI_PLACES=416, PETRI_TRANSITIONS=603} [2024-06-14 13:11:22,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-14 13:11:22,437 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 603 transitions, 8980 flow [2024-06-14 13:11:22,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:22,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:22,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:22,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:11:22,438 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)] === [2024-06-14 13:11:22,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:22,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1290393213, now seen corresponding path program 21 times [2024-06-14 13:11:22,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:22,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815727718] [2024-06-14 13:11:22,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:22,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:25,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:25,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815727718] [2024-06-14 13:11:25,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815727718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:25,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:25,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:25,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056992210] [2024-06-14 13:11:25,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:25,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:25,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:25,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:25,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:25,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:25,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 603 transitions, 8980 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:25,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:25,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:25,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:27,971 INFO L124 PetriNetUnfolderBase]: 3558/5831 cut-off events. [2024-06-14 13:11:27,971 INFO L125 PetriNetUnfolderBase]: For 479984/480036 co-relation queries the response was YES. [2024-06-14 13:11:28,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43698 conditions, 5831 events. 3558/5831 cut-off events. For 479984/480036 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 37482 event pairs, 675 based on Foata normal form. 37/5856 useless extension candidates. Maximal degree in co-relation 43522. Up to 4954 conditions per place. [2024-06-14 13:11:28,063 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 390 selfloop transitions, 246 changer transitions 0/641 dead transitions. [2024-06-14 13:11:28,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 641 transitions, 10564 flow [2024-06-14 13:11:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:11:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:11:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-14 13:11:28,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38477801268498946 [2024-06-14 13:11:28,065 INFO L175 Difference]: Start difference. First operand has 416 places, 603 transitions, 8980 flow. Second operand 11 states and 182 transitions. [2024-06-14 13:11:28,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 641 transitions, 10564 flow [2024-06-14 13:11:30,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 641 transitions, 10354 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:30,365 INFO L231 Difference]: Finished difference. Result has 421 places, 606 transitions, 9298 flow [2024-06-14 13:11:30,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8770, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9298, PETRI_PLACES=421, PETRI_TRANSITIONS=606} [2024-06-14 13:11:30,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-14 13:11:30,365 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 606 transitions, 9298 flow [2024-06-14 13:11:30,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:30,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:30,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:30,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:11:30,366 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)] === [2024-06-14 13:11:30,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:30,367 INFO L85 PathProgramCache]: Analyzing trace with hash -553408337, now seen corresponding path program 10 times [2024-06-14 13:11:30,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:30,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845419879] [2024-06-14 13:11:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:30,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:33,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:33,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845419879] [2024-06-14 13:11:33,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845419879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:33,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:33,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:33,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042088502] [2024-06-14 13:11:33,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:33,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:33,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:33,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:33,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:33,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:33,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 606 transitions, 9298 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:33,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:33,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:33,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:35,370 INFO L124 PetriNetUnfolderBase]: 3568/5858 cut-off events. [2024-06-14 13:11:35,371 INFO L125 PetriNetUnfolderBase]: For 495770/495822 co-relation queries the response was YES. [2024-06-14 13:11:35,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44341 conditions, 5858 events. 3568/5858 cut-off events. For 495770/495822 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 37755 event pairs, 653 based on Foata normal form. 38/5884 useless extension candidates. Maximal degree in co-relation 44164. Up to 5012 conditions per place. [2024-06-14 13:11:35,456 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 475 selfloop transitions, 156 changer transitions 0/636 dead transitions. [2024-06-14 13:11:35,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 636 transitions, 10932 flow [2024-06-14 13:11:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:11:35,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:11:35,457 INFO L175 Difference]: Start difference. First operand has 421 places, 606 transitions, 9298 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:11:35,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 636 transitions, 10932 flow [2024-06-14 13:11:37,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 636 transitions, 10509 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:11:37,684 INFO L231 Difference]: Finished difference. Result has 421 places, 612 transitions, 9323 flow [2024-06-14 13:11:37,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8875, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9323, PETRI_PLACES=421, PETRI_TRANSITIONS=612} [2024-06-14 13:11:37,684 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-14 13:11:37,684 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 612 transitions, 9323 flow [2024-06-14 13:11:37,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:37,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:37,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:37,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:11:37,685 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)] === [2024-06-14 13:11:37,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash -396298629, now seen corresponding path program 11 times [2024-06-14 13:11:37,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:37,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97178610] [2024-06-14 13:11:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:37,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:40,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:40,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97178610] [2024-06-14 13:11:40,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97178610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:40,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:40,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:40,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367938752] [2024-06-14 13:11:40,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:40,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:40,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:40,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:40,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:40,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:40,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 612 transitions, 9323 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:40,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:40,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:40,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:43,101 INFO L124 PetriNetUnfolderBase]: 3578/5846 cut-off events. [2024-06-14 13:11:43,101 INFO L125 PetriNetUnfolderBase]: For 507189/507204 co-relation queries the response was YES. [2024-06-14 13:11:43,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44734 conditions, 5846 events. 3578/5846 cut-off events. For 507189/507204 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 37440 event pairs, 633 based on Foata normal form. 16/5858 useless extension candidates. Maximal degree in co-relation 44556. Up to 5249 conditions per place. [2024-06-14 13:11:43,189 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 531 selfloop transitions, 108 changer transitions 0/644 dead transitions. [2024-06-14 13:11:43,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 644 transitions, 10920 flow [2024-06-14 13:11:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:43,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 13:11:43,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:11:43,190 INFO L175 Difference]: Start difference. First operand has 421 places, 612 transitions, 9323 flow. Second operand 10 states and 165 transitions. [2024-06-14 13:11:43,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 644 transitions, 10920 flow [2024-06-14 13:11:45,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 644 transitions, 10745 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 13:11:45,275 INFO L231 Difference]: Finished difference. Result has 427 places, 615 transitions, 9435 flow [2024-06-14 13:11:45,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9148, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9435, PETRI_PLACES=427, PETRI_TRANSITIONS=615} [2024-06-14 13:11:45,275 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-14 13:11:45,275 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 615 transitions, 9435 flow [2024-06-14 13:11:45,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:45,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:45,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:45,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:11:45,276 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:45,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2028214111, now seen corresponding path program 12 times [2024-06-14 13:11:45,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:45,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960650220] [2024-06-14 13:11:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:45,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:48,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:48,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960650220] [2024-06-14 13:11:48,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960650220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:48,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:48,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:48,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845476901] [2024-06-14 13:11:48,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:48,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:48,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:48,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:48,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:48,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:48,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 615 transitions, 9435 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:48,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:48,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:48,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:50,949 INFO L124 PetriNetUnfolderBase]: 3572/5840 cut-off events. [2024-06-14 13:11:50,949 INFO L125 PetriNetUnfolderBase]: For 505880/505895 co-relation queries the response was YES. [2024-06-14 13:11:51,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44544 conditions, 5840 events. 3572/5840 cut-off events. For 505880/505895 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 37506 event pairs, 633 based on Foata normal form. 16/5852 useless extension candidates. Maximal degree in co-relation 44364. Up to 5244 conditions per place. [2024-06-14 13:11:51,034 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 531 selfloop transitions, 108 changer transitions 0/644 dead transitions. [2024-06-14 13:11:51,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 644 transitions, 10793 flow [2024-06-14 13:11:51,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:11:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:11:51,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-14 13:11:51,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699788583509514 [2024-06-14 13:11:51,035 INFO L175 Difference]: Start difference. First operand has 427 places, 615 transitions, 9435 flow. Second operand 11 states and 175 transitions. [2024-06-14 13:11:51,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 644 transitions, 10793 flow [2024-06-14 13:11:53,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 644 transitions, 10560 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-14 13:11:53,795 INFO L231 Difference]: Finished difference. Result has 429 places, 615 transitions, 9436 flow [2024-06-14 13:11:53,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9202, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9436, PETRI_PLACES=429, PETRI_TRANSITIONS=615} [2024-06-14 13:11:53,796 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-14 13:11:53,796 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 615 transitions, 9436 flow [2024-06-14 13:11:53,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:53,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:53,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:53,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:11:53,796 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:53,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:53,797 INFO L85 PathProgramCache]: Analyzing trace with hash -413513859, now seen corresponding path program 13 times [2024-06-14 13:11:53,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:53,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093960601] [2024-06-14 13:11:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:53,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:56,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:56,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093960601] [2024-06-14 13:11:56,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093960601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:56,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:56,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:56,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141252333] [2024-06-14 13:11:56,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:56,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:56,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:56,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:56,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:56,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:56,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 615 transitions, 9436 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:56,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:56,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:56,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:59,491 INFO L124 PetriNetUnfolderBase]: 3582/5882 cut-off events. [2024-06-14 13:11:59,491 INFO L125 PetriNetUnfolderBase]: For 496931/496983 co-relation queries the response was YES. [2024-06-14 13:11:59,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44559 conditions, 5882 events. 3582/5882 cut-off events. For 496931/496983 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 38036 event pairs, 625 based on Foata normal form. 38/5908 useless extension candidates. Maximal degree in co-relation 44380. Up to 5080 conditions per place. [2024-06-14 13:11:59,569 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 487 selfloop transitions, 154 changer transitions 0/646 dead transitions. [2024-06-14 13:11:59,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 646 transitions, 11218 flow [2024-06-14 13:11:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 13:11:59,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813953488372093 [2024-06-14 13:11:59,570 INFO L175 Difference]: Start difference. First operand has 429 places, 615 transitions, 9436 flow. Second operand 10 states and 164 transitions. [2024-06-14 13:11:59,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 646 transitions, 11218 flow [2024-06-14 13:12:01,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 646 transitions, 10957 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-14 13:12:01,643 INFO L231 Difference]: Finished difference. Result has 426 places, 618 transitions, 9561 flow [2024-06-14 13:12:01,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9187, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9561, PETRI_PLACES=426, PETRI_TRANSITIONS=618} [2024-06-14 13:12:01,644 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-14 13:12:01,644 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 618 transitions, 9561 flow [2024-06-14 13:12:01,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:01,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:01,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:01,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:12:01,645 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:01,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:01,645 INFO L85 PathProgramCache]: Analyzing trace with hash -418639089, now seen corresponding path program 14 times [2024-06-14 13:12:01,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:01,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939004318] [2024-06-14 13:12:01,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:01,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:04,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:04,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939004318] [2024-06-14 13:12:04,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939004318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:04,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:04,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:04,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544045810] [2024-06-14 13:12:04,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:04,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:04,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:04,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:04,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:04,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:04,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 618 transitions, 9561 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:04,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:04,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:04,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:06,370 INFO L124 PetriNetUnfolderBase]: 3624/5936 cut-off events. [2024-06-14 13:12:06,370 INFO L125 PetriNetUnfolderBase]: For 495048/495100 co-relation queries the response was YES. [2024-06-14 13:12:06,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45295 conditions, 5936 events. 3624/5936 cut-off events. For 495048/495100 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 38253 event pairs, 657 based on Foata normal form. 38/5962 useless extension candidates. Maximal degree in co-relation 45118. Up to 5120 conditions per place. [2024-06-14 13:12:06,459 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 499 selfloop transitions, 147 changer transitions 0/651 dead transitions. [2024-06-14 13:12:06,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 651 transitions, 11457 flow [2024-06-14 13:12:06,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:06,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:06,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:12:06,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:12:06,461 INFO L175 Difference]: Start difference. First operand has 426 places, 618 transitions, 9561 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:12:06,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 651 transitions, 11457 flow [2024-06-14 13:12:08,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 651 transitions, 10891 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-14 13:12:08,478 INFO L231 Difference]: Finished difference. Result has 425 places, 627 transitions, 9475 flow [2024-06-14 13:12:08,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9043, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9475, PETRI_PLACES=425, PETRI_TRANSITIONS=627} [2024-06-14 13:12:08,478 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-14 13:12:08,478 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 627 transitions, 9475 flow [2024-06-14 13:12:08,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:08,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:08,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:08,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:12:08,479 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:08,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:08,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1605871193, now seen corresponding path program 15 times [2024-06-14 13:12:08,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:08,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314942156] [2024-06-14 13:12:08,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:08,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:11,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:11,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314942156] [2024-06-14 13:12:11,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314942156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:11,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:11,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:11,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223804200] [2024-06-14 13:12:11,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:11,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:11,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:11,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:11,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:11,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:11,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 627 transitions, 9475 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:11,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:11,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:11,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:13,563 INFO L124 PetriNetUnfolderBase]: 3618/5924 cut-off events. [2024-06-14 13:12:13,563 INFO L125 PetriNetUnfolderBase]: For 495968/496020 co-relation queries the response was YES. [2024-06-14 13:12:13,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44526 conditions, 5924 events. 3618/5924 cut-off events. For 495968/496020 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 38157 event pairs, 690 based on Foata normal form. 38/5950 useless extension candidates. Maximal degree in co-relation 44349. Up to 5352 conditions per place. [2024-06-14 13:12:13,654 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 563 selfloop transitions, 82 changer transitions 0/650 dead transitions. [2024-06-14 13:12:13,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 650 transitions, 10835 flow [2024-06-14 13:12:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:13,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:12:13,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 13:12:13,655 INFO L175 Difference]: Start difference. First operand has 425 places, 627 transitions, 9475 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:12:13,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 650 transitions, 10835 flow [2024-06-14 13:12:15,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 650 transitions, 10548 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 13:12:15,725 INFO L231 Difference]: Finished difference. Result has 428 places, 627 transitions, 9358 flow [2024-06-14 13:12:15,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9188, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9358, PETRI_PLACES=428, PETRI_TRANSITIONS=627} [2024-06-14 13:12:15,726 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-14 13:12:15,726 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 627 transitions, 9358 flow [2024-06-14 13:12:15,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:15,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:15,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:15,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:12:15,726 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:15,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:15,726 INFO L85 PathProgramCache]: Analyzing trace with hash -413276709, now seen corresponding path program 16 times [2024-06-14 13:12:15,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:15,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719181302] [2024-06-14 13:12:15,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:15,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:18,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:18,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719181302] [2024-06-14 13:12:18,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719181302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:18,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:18,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:18,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893071670] [2024-06-14 13:12:18,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:18,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:18,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:18,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:18,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:18,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:18,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 627 transitions, 9358 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:18,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:18,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:18,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:20,982 INFO L124 PetriNetUnfolderBase]: 3612/5920 cut-off events. [2024-06-14 13:12:20,982 INFO L125 PetriNetUnfolderBase]: For 495943/495995 co-relation queries the response was YES. [2024-06-14 13:12:21,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44142 conditions, 5920 events. 3612/5920 cut-off events. For 495943/495995 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 38173 event pairs, 632 based on Foata normal form. 38/5946 useless extension candidates. Maximal degree in co-relation 43964. Up to 5110 conditions per place. [2024-06-14 13:12:21,058 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 488 selfloop transitions, 160 changer transitions 0/653 dead transitions. [2024-06-14 13:12:21,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 653 transitions, 11090 flow [2024-06-14 13:12:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:21,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:21,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:12:21,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-14 13:12:21,059 INFO L175 Difference]: Start difference. First operand has 428 places, 627 transitions, 9358 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:12:21,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 653 transitions, 11090 flow [2024-06-14 13:12:22,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 653 transitions, 10892 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:12:22,947 INFO L231 Difference]: Finished difference. Result has 431 places, 627 transitions, 9486 flow [2024-06-14 13:12:22,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9160, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9486, PETRI_PLACES=431, PETRI_TRANSITIONS=627} [2024-06-14 13:12:22,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-14 13:12:22,948 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 627 transitions, 9486 flow [2024-06-14 13:12:22,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:22,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:22,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:22,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:12:22,949 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:22,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash -419055171, now seen corresponding path program 22 times [2024-06-14 13:12:22,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:22,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141619403] [2024-06-14 13:12:22,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:22,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:26,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:26,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141619403] [2024-06-14 13:12:26,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141619403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:26,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:26,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:26,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63546544] [2024-06-14 13:12:26,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:26,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:26,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:26,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:26,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:26,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:26,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 627 transitions, 9486 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:26,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:26,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:26,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:28,434 INFO L124 PetriNetUnfolderBase]: 3609/5911 cut-off events. [2024-06-14 13:12:28,435 INFO L125 PetriNetUnfolderBase]: For 498569/498621 co-relation queries the response was YES. [2024-06-14 13:12:28,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44362 conditions, 5911 events. 3609/5911 cut-off events. For 498569/498621 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 38117 event pairs, 682 based on Foata normal form. 37/5936 useless extension candidates. Maximal degree in co-relation 44183. Up to 5069 conditions per place. [2024-06-14 13:12:28,541 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 459 selfloop transitions, 199 changer transitions 0/663 dead transitions. [2024-06-14 13:12:28,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 663 transitions, 11096 flow [2024-06-14 13:12:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:12:28,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 13:12:28,542 INFO L175 Difference]: Start difference. First operand has 431 places, 627 transitions, 9486 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:12:28,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 663 transitions, 11096 flow [2024-06-14 13:12:30,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 663 transitions, 10711 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 13:12:30,811 INFO L231 Difference]: Finished difference. Result has 431 places, 627 transitions, 9509 flow [2024-06-14 13:12:30,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9101, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9509, PETRI_PLACES=431, PETRI_TRANSITIONS=627} [2024-06-14 13:12:30,811 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-14 13:12:30,812 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 627 transitions, 9509 flow [2024-06-14 13:12:30,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:30,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:30,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:30,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:12:30,812 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:30,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:30,813 INFO L85 PathProgramCache]: Analyzing trace with hash -426412401, now seen corresponding path program 23 times [2024-06-14 13:12:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:30,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000058179] [2024-06-14 13:12:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:30,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:34,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:34,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000058179] [2024-06-14 13:12:34,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000058179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:34,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:34,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:34,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293853698] [2024-06-14 13:12:34,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:34,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:34,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:34,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:34,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:34,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:34,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 627 transitions, 9509 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:34,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:34,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:34,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:36,859 INFO L124 PetriNetUnfolderBase]: 3603/5899 cut-off events. [2024-06-14 13:12:36,860 INFO L125 PetriNetUnfolderBase]: For 502754/502769 co-relation queries the response was YES. [2024-06-14 13:12:36,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44242 conditions, 5899 events. 3603/5899 cut-off events. For 502754/502769 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 37939 event pairs, 660 based on Foata normal form. 16/5911 useless extension candidates. Maximal degree in co-relation 44062. Up to 5063 conditions per place. [2024-06-14 13:12:36,958 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 461 selfloop transitions, 210 changer transitions 0/676 dead transitions. [2024-06-14 13:12:36,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 676 transitions, 11183 flow [2024-06-14 13:12:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-14 13:12:36,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-14 13:12:36,960 INFO L175 Difference]: Start difference. First operand has 431 places, 627 transitions, 9509 flow. Second operand 10 states and 187 transitions. [2024-06-14 13:12:36,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 676 transitions, 11183 flow [2024-06-14 13:12:39,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 676 transitions, 10662 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-14 13:12:39,433 INFO L231 Difference]: Finished difference. Result has 432 places, 627 transitions, 9459 flow [2024-06-14 13:12:39,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8990, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9459, PETRI_PLACES=432, PETRI_TRANSITIONS=627} [2024-06-14 13:12:39,433 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-14 13:12:39,433 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 627 transitions, 9459 flow [2024-06-14 13:12:39,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:39,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:39,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:39,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:12:39,434 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:39,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:39,435 INFO L85 PathProgramCache]: Analyzing trace with hash -413514045, now seen corresponding path program 16 times [2024-06-14 13:12:39,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:39,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47404899] [2024-06-14 13:12:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:39,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:42,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:42,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47404899] [2024-06-14 13:12:42,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47404899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:42,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:42,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:42,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664597324] [2024-06-14 13:12:42,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:42,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:42,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:42,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:42,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:42,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:42,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 627 transitions, 9459 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:42,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:42,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:42,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:44,837 INFO L124 PetriNetUnfolderBase]: 3613/5921 cut-off events. [2024-06-14 13:12:44,837 INFO L125 PetriNetUnfolderBase]: For 504096/504148 co-relation queries the response was YES. [2024-06-14 13:12:44,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44350 conditions, 5921 events. 3613/5921 cut-off events. For 504096/504148 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 38146 event pairs, 605 based on Foata normal form. 38/5947 useless extension candidates. Maximal degree in co-relation 44170. Up to 5015 conditions per place. [2024-06-14 13:12:44,937 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 443 selfloop transitions, 211 changer transitions 0/659 dead transitions. [2024-06-14 13:12:44,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 659 transitions, 11097 flow [2024-06-14 13:12:44,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:12:44,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 13:12:44,938 INFO L175 Difference]: Start difference. First operand has 432 places, 627 transitions, 9459 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:12:44,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 659 transitions, 11097 flow [2024-06-14 13:12:47,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 659 transitions, 10662 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-14 13:12:47,436 INFO L231 Difference]: Finished difference. Result has 430 places, 630 transitions, 9528 flow [2024-06-14 13:12:47,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9030, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9528, PETRI_PLACES=430, PETRI_TRANSITIONS=630} [2024-06-14 13:12:47,436 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-14 13:12:47,437 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 630 transitions, 9528 flow [2024-06-14 13:12:47,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:47,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:47,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:47,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:12:47,437 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:47,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:47,438 INFO L85 PathProgramCache]: Analyzing trace with hash 699556509, now seen corresponding path program 17 times [2024-06-14 13:12:47,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:47,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016355291] [2024-06-14 13:12:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:47,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:50,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016355291] [2024-06-14 13:12:50,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016355291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:50,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:50,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:50,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384700151] [2024-06-14 13:12:50,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:50,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:50,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:50,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 630 transitions, 9528 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:50,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:50,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:50,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:53,092 INFO L124 PetriNetUnfolderBase]: 3633/5941 cut-off events. [2024-06-14 13:12:53,092 INFO L125 PetriNetUnfolderBase]: For 494235/494250 co-relation queries the response was YES. [2024-06-14 13:12:53,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44739 conditions, 5941 events. 3633/5941 cut-off events. For 494235/494250 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 38178 event pairs, 622 based on Foata normal form. 18/5955 useless extension candidates. Maximal degree in co-relation 44561. Up to 5122 conditions per place. [2024-06-14 13:12:53,186 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 471 selfloop transitions, 195 changer transitions 0/671 dead transitions. [2024-06-14 13:12:53,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 671 transitions, 11281 flow [2024-06-14 13:12:53,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 13:12:53,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 13:12:53,187 INFO L175 Difference]: Start difference. First operand has 430 places, 630 transitions, 9528 flow. Second operand 9 states and 161 transitions. [2024-06-14 13:12:53,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 671 transitions, 11281 flow [2024-06-14 13:12:55,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 671 transitions, 10805 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 13:12:55,389 INFO L231 Difference]: Finished difference. Result has 432 places, 636 transitions, 9631 flow [2024-06-14 13:12:55,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9064, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9631, PETRI_PLACES=432, PETRI_TRANSITIONS=636} [2024-06-14 13:12:55,390 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-14 13:12:55,390 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 636 transitions, 9631 flow [2024-06-14 13:12:55,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:55,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:55,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:55,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:12:55,390 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:55,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:55,391 INFO L85 PathProgramCache]: Analyzing trace with hash 183117411, now seen corresponding path program 17 times [2024-06-14 13:12:55,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:55,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286466728] [2024-06-14 13:12:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:55,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:58,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:58,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286466728] [2024-06-14 13:12:58,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286466728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:58,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:58,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:58,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171462989] [2024-06-14 13:12:58,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:58,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:58,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:58,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:58,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:58,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:58,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 636 transitions, 9631 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:58,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:58,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:58,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15