./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe001_power.oepc.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/safe001_power.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe001_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:50:21,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:50:21,654 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:50:21,658 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:50:21,658 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:50:21,679 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:50:21,679 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:50:21,679 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:50:21,680 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:50:21,680 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:50:21,680 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:50:21,681 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:50:21,681 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:50:21,681 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:50:21,682 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:50:21,682 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:50:21,682 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:50:21,683 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:50:21,683 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:50:21,683 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:50:21,683 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:50:21,686 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:50:21,686 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:50:21,686 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:50:21,689 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:50:21,689 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:50:21,689 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:50:21,690 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:50:21,691 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:50:21,691 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:50:21,692 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:50:21,692 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:50:21,692 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:50:21,693 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:50:21,693 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:50:21,693 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:50:21,693 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:50:21,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:50:21,693 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:50:21,693 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:50:21,694 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:50:21,694 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:50:21,694 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:50:21,695 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:50:21,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:50:21,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:50:21,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:50:21,959 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:50:21,959 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:50:21,960 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i [2024-06-14 12:50:23,059 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:50:23,315 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:50:23,315 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_power.oepc.i [2024-06-14 12:50:23,337 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba702668b/a2a9f901d8994c36a1a630e593eb232e/FLAG3776604ad [2024-06-14 12:50:23,639 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba702668b/a2a9f901d8994c36a1a630e593eb232e [2024-06-14 12:50:23,641 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:50:23,642 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:50:23,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe001_power.oepc.yml/witness.yml [2024-06-14 12:50:23,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:50:23,817 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:50:23,819 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:50:23,819 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:50:23,823 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:50:23,823 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:50:23" (1/2) ... [2024-06-14 12:50:23,824 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eec1985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:50:23, skipping insertion in model container [2024-06-14 12:50:23,824 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:50:23" (1/2) ... [2024-06-14 12:50:23,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7001ba72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:50:23, skipping insertion in model container [2024-06-14 12:50:23,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:50:23" (2/2) ... [2024-06-14 12:50:23,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eec1985 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:50:23, skipping insertion in model container [2024-06-14 12:50:23,826 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:50:23" (2/2) ... [2024-06-14 12:50:23,827 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:50:23,987 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:50:23,988 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 12:50:23,988 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 12:50:23,989 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 12:50:23,989 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:50:23,989 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-14 12:50:24,045 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:50:24,379 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:50:24,387 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:50:24,552 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:50:24,597 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:50:24,597 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:50:24 WrapperNode [2024-06-14 12:50:24,597 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:50:24,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:50:24,599 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:50:24,599 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:50:24,605 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 12:50:24" (1/1) ... [2024-06-14 12:50:24,628 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 12:50:24" (1/1) ... [2024-06-14 12:50:24,664 INFO L138 Inliner]: procedures = 175, calls = 109, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 282 [2024-06-14 12:50:24,667 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:50:24,668 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:50:24,668 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:50:24,668 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:50:24,677 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 12:50:24" (1/1) ... [2024-06-14 12:50:24,678 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 12:50:24" (1/1) ... [2024-06-14 12:50:24,691 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 12:50:24" (1/1) ... [2024-06-14 12:50:24,723 INFO L175 MemorySlicer]: Split 68 memory accesses to 2 slices as follows [2, 66]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-14 12:50:24,725 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 12:50:24" (1/1) ... [2024-06-14 12:50:24,726 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 12:50:24" (1/1) ... [2024-06-14 12:50:24,749 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 12:50:24" (1/1) ... [2024-06-14 12:50:24,755 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 12:50:24" (1/1) ... [2024-06-14 12:50:24,758 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 12:50:24" (1/1) ... [2024-06-14 12:50:24,763 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 12:50:24" (1/1) ... [2024-06-14 12:50:24,768 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:50:24,768 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:50:24,768 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:50:24,769 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:50:24,772 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 12:50:24" (1/1) ... [2024-06-14 12:50:24,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:50:24,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:50:24,796 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 12:50:24,814 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 12:50:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 12:50:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 12:50:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 12:50:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 12:50:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:50:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:50:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:50:24,829 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:50:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:50:24,830 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:50:24,830 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:50:24,830 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:50:24,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:50:24,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 12:50:24,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:50:24,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:50:24,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:50:24,832 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 12:50:24,946 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:50:24,947 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:50:25,535 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:50:25,535 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:50:26,063 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:50:26,063 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:50:26,064 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:50:26 BoogieIcfgContainer [2024-06-14 12:50:26,064 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:50:26,065 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:50:26,065 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:50:26,067 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:50:26,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:50:23" (1/4) ... [2024-06-14 12:50:26,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1dd78f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:50:26, skipping insertion in model container [2024-06-14 12:50:26,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:50:23" (2/4) ... [2024-06-14 12:50:26,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1dd78f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:50:26, skipping insertion in model container [2024-06-14 12:50:26,068 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 12:50:24" (3/4) ... [2024-06-14 12:50:26,068 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1dd78f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:50:26, skipping insertion in model container [2024-06-14 12:50:26,068 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:50:26" (4/4) ... [2024-06-14 12:50:26,069 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_power.oepc.i [2024-06-14 12:50:26,083 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:50:26,083 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:50:26,083 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:50:26,135 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:50:26,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:50:26,198 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 12:50:26,198 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:50:26,201 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 55 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 12:50:26,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:50:26,203 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 12:50:26,214 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:50:26,220 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;@58c3e368, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:50:26,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:50:26,225 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:50:26,226 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 12:50:26,226 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:50:26,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:26,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:50:26,227 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 12:50:26,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1033482732, now seen corresponding path program 1 times [2024-06-14 12:50:26,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:26,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634258218] [2024-06-14 12:50:26,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:26,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:28,094 INFO 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 12:50:28,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:28,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634258218] [2024-06-14 12:50:28,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634258218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:28,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:28,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:50:28,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033741784] [2024-06-14 12:50:28,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:28,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:50:28,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:28,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:50:28,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:50:28,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:50:28,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:28,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:28,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:50:28,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:28,794 INFO L124 PetriNetUnfolderBase]: 1409/2138 cut-off events. [2024-06-14 12:50:28,795 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 12:50:28,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4338 conditions, 2138 events. 1409/2138 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9997 event pairs, 873 based on Foata normal form. 2/2105 useless extension candidates. Maximal degree in co-relation 4323. Up to 2108 conditions per place. [2024-06-14 12:50:28,808 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 39 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-06-14 12:50:28,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 47 transitions, 195 flow [2024-06-14 12:50:28,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:50:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:50:28,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-06-14 12:50:28,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2024-06-14 12:50:28,818 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 67 transitions. [2024-06-14 12:50:28,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 47 transitions, 195 flow [2024-06-14 12:50:28,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 190 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:50:28,822 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 12:50:28,823 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 12:50:28,826 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 12:50:28,826 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 12:50:28,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:28,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:28,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:28,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:50:28,827 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 12:50:28,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1039510251, now seen corresponding path program 1 times [2024-06-14 12:50:28,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:28,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962446438] [2024-06-14 12:50:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:28,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:31,318 INFO 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 12:50:31,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:31,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962446438] [2024-06-14 12:50:31,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962446438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:31,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:31,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:50:31,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024775059] [2024-06-14 12:50:31,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:31,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:50:31,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:50:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:50:31,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:50:31,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:31,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:31,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:50:31,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:31,937 INFO L124 PetriNetUnfolderBase]: 1400/2125 cut-off events. [2024-06-14 12:50:31,938 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2024-06-14 12:50:31,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4877 conditions, 2125 events. 1400/2125 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9976 event pairs, 726 based on Foata normal form. 4/2128 useless extension candidates. Maximal degree in co-relation 4862. Up to 2071 conditions per place. [2024-06-14 12:50:31,946 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-06-14 12:50:31,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 274 flow [2024-06-14 12:50:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:50:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:50:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-06-14 12:50:31,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058139534883721 [2024-06-14 12:50:31,948 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 87 transitions. [2024-06-14 12:50:31,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 274 flow [2024-06-14 12:50:31,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:50:31,950 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 12:50:31,951 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 12:50:31,951 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 12:50:31,951 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 12:50:31,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:31,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:31,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:31,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:50:31,952 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 12:50:31,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:31,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2134918958, now seen corresponding path program 1 times [2024-06-14 12:50:31,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:31,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628221898] [2024-06-14 12:50:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:31,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:34,222 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 12:50:34,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:34,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628221898] [2024-06-14 12:50:34,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628221898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:34,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:34,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:50:34,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892428556] [2024-06-14 12:50:34,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:34,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:50:34,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:34,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:50:34,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:50:34,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:50:34,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:34,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:34,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:50:34,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:34,899 INFO L124 PetriNetUnfolderBase]: 1414/2158 cut-off events. [2024-06-14 12:50:34,900 INFO L125 PetriNetUnfolderBase]: For 1112/1112 co-relation queries the response was YES. [2024-06-14 12:50:34,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5480 conditions, 2158 events. 1414/2158 cut-off events. For 1112/1112 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10248 event pairs, 512 based on Foata normal form. 7/2164 useless extension candidates. Maximal degree in co-relation 5463. Up to 1977 conditions per place. [2024-06-14 12:50:34,909 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 16 changer transitions 0/85 dead transitions. [2024-06-14 12:50:34,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 85 transitions, 440 flow [2024-06-14 12:50:34,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:50:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:50:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-14 12:50:34,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-14 12:50:34,911 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 115 transitions. [2024-06-14 12:50:34,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 85 transitions, 440 flow [2024-06-14 12:50:34,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 85 transitions, 426 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:50:34,914 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-14 12:50:34,914 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=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-14 12:50:34,915 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-14 12:50:34,915 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-14 12:50:34,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:34,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:34,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:34,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:50:34,915 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 12:50:34,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1337302001, now seen corresponding path program 1 times [2024-06-14 12:50:34,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:34,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018086413] [2024-06-14 12:50:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:34,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:37,287 INFO 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 12:50:37,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:37,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018086413] [2024-06-14 12:50:37,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018086413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:37,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:37,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:50:37,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13833890] [2024-06-14 12:50:37,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:37,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:50:37,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:37,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:50:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:50:37,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:50:37,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:37,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:37,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:50:37,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:37,964 INFO L124 PetriNetUnfolderBase]: 1435/2193 cut-off events. [2024-06-14 12:50:37,964 INFO L125 PetriNetUnfolderBase]: For 2633/2633 co-relation queries the response was YES. [2024-06-14 12:50:37,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6594 conditions, 2193 events. 1435/2193 cut-off events. For 2633/2633 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10514 event pairs, 349 based on Foata normal form. 14/2206 useless extension candidates. Maximal degree in co-relation 6574. Up to 1924 conditions per place. [2024-06-14 12:50:37,976 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 71 selfloop transitions, 19 changer transitions 0/94 dead transitions. [2024-06-14 12:50:37,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 551 flow [2024-06-14 12:50:37,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:50:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:50:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-14 12:50:37,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077519379844961 [2024-06-14 12:50:37,978 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 131 transitions. [2024-06-14 12:50:37,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 551 flow [2024-06-14 12:50:37,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 94 transitions, 543 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 12:50:37,981 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 295 flow [2024-06-14 12:50:37,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-14 12:50:37,982 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-14 12:50:37,982 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 295 flow [2024-06-14 12:50:37,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:37,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:37,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:37,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:50:37,983 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 12:50:37,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:37,983 INFO L85 PathProgramCache]: Analyzing trace with hash -125875093, now seen corresponding path program 1 times [2024-06-14 12:50:37,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:37,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750830878] [2024-06-14 12:50:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:37,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:39,294 INFO 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 12:50:39,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:39,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750830878] [2024-06-14 12:50:39,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750830878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:39,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:39,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:50:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50837816] [2024-06-14 12:50:39,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:39,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:50:39,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:39,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:50:39,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:50:39,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:50:39,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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 12:50:39,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:39,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:50:39,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:40,331 INFO L124 PetriNetUnfolderBase]: 1427/2181 cut-off events. [2024-06-14 12:50:40,332 INFO L125 PetriNetUnfolderBase]: For 3892/3892 co-relation queries the response was YES. [2024-06-14 12:50:40,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7159 conditions, 2181 events. 1427/2181 cut-off events. For 3892/3892 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10458 event pairs, 503 based on Foata normal form. 3/2183 useless extension candidates. Maximal degree in co-relation 7136. Up to 2124 conditions per place. [2024-06-14 12:50:40,348 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 57 selfloop transitions, 8 changer transitions 0/69 dead transitions. [2024-06-14 12:50:40,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 463 flow [2024-06-14 12:50:40,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:50:40,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:50:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-14 12:50:40,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-14 12:50:40,352 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 295 flow. Second operand 5 states and 88 transitions. [2024-06-14 12:50:40,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 463 flow [2024-06-14 12:50:40,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 413 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:50:40,362 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 269 flow [2024-06-14 12:50:40,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-14 12:50:40,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 12:50:40,365 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 269 flow [2024-06-14 12:50:40,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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 12:50:40,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:40,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:40,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:50:40,366 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 12:50:40,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:40,366 INFO L85 PathProgramCache]: Analyzing trace with hash 368825508, now seen corresponding path program 1 times [2024-06-14 12:50:40,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:40,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360877891] [2024-06-14 12:50:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:40,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:41,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:41,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360877891] [2024-06-14 12:50:41,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360877891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:41,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:41,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:50:41,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900807790] [2024-06-14 12:50:41,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:41,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:50:41,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:41,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:50:41,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:50:42,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:50:42,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:42,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:42,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:50:42,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:43,123 INFO L124 PetriNetUnfolderBase]: 1417/2163 cut-off events. [2024-06-14 12:50:43,123 INFO L125 PetriNetUnfolderBase]: For 4555/4555 co-relation queries the response was YES. [2024-06-14 12:50:43,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7081 conditions, 2163 events. 1417/2163 cut-off events. For 4555/4555 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10138 event pairs, 551 based on Foata normal form. 4/2166 useless extension candidates. Maximal degree in co-relation 7056. Up to 2096 conditions per place. [2024-06-14 12:50:43,134 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 67 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-06-14 12:50:43,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 525 flow [2024-06-14 12:50:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:50:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:50:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 12:50:43,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:50:43,137 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 269 flow. Second operand 6 states and 102 transitions. [2024-06-14 12:50:43,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 525 flow [2024-06-14 12:50:43,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 82 transitions, 493 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 12:50:43,141 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 341 flow [2024-06-14 12:50:43,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-06-14 12:50:43,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-14 12:50:43,144 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 341 flow [2024-06-14 12:50:43,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:43,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:43,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:43,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:50:43,145 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 12:50:43,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:43,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1457031480, now seen corresponding path program 1 times [2024-06-14 12:50:43,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:43,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160915464] [2024-06-14 12:50:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:43,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:45,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:45,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160915464] [2024-06-14 12:50:45,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160915464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:45,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:45,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:50:45,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263476095] [2024-06-14 12:50:45,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:45,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:50:45,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:50:45,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:50:45,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:50:45,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:45,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:45,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:50:45,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:46,364 INFO L124 PetriNetUnfolderBase]: 1427/2179 cut-off events. [2024-06-14 12:50:46,364 INFO L125 PetriNetUnfolderBase]: For 5853/5855 co-relation queries the response was YES. [2024-06-14 12:50:46,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7683 conditions, 2179 events. 1427/2179 cut-off events. For 5853/5855 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10326 event pairs, 496 based on Foata normal form. 8/2186 useless extension candidates. Maximal degree in co-relation 7656. Up to 1997 conditions per place. [2024-06-14 12:50:46,379 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 22 changer transitions 0/92 dead transitions. [2024-06-14 12:50:46,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 92 transitions, 631 flow [2024-06-14 12:50:46,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:50:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:50:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-14 12:50:46,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:50:46,381 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 341 flow. Second operand 6 states and 114 transitions. [2024-06-14 12:50:46,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 92 transitions, 631 flow [2024-06-14 12:50:46,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 92 transitions, 625 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 12:50:46,385 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 413 flow [2024-06-14 12:50:46,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-14 12:50:46,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-14 12:50:46,386 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 413 flow [2024-06-14 12:50:46,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:46,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:46,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:46,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:50:46,387 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 12:50:46,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash -706840470, now seen corresponding path program 2 times [2024-06-14 12:50:46,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:46,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266828005] [2024-06-14 12:50:46,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:46,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:48,360 INFO 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 12:50:48,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:48,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266828005] [2024-06-14 12:50:48,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266828005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:48,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:48,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:50:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600610629] [2024-06-14 12:50:48,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:48,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:50:48,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:48,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:50:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:50:48,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:50:48,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 413 flow. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:48,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:48,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:50:48,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:49,392 INFO L124 PetriNetUnfolderBase]: 1407/2136 cut-off events. [2024-06-14 12:50:49,392 INFO L125 PetriNetUnfolderBase]: For 7168/7168 co-relation queries the response was YES. [2024-06-14 12:50:49,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7875 conditions, 2136 events. 1407/2136 cut-off events. For 7168/7168 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9989 event pairs, 514 based on Foata normal form. 3/2135 useless extension candidates. Maximal degree in co-relation 7845. Up to 1973 conditions per place. [2024-06-14 12:50:49,401 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 23 changer transitions 0/87 dead transitions. [2024-06-14 12:50:49,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 87 transitions, 637 flow [2024-06-14 12:50:49,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:50:49,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:50:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 12:50:49,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-14 12:50:49,405 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 413 flow. Second operand 6 states and 109 transitions. [2024-06-14 12:50:49,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 87 transitions, 637 flow [2024-06-14 12:50:49,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 87 transitions, 604 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:50:49,414 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 435 flow [2024-06-14 12:50:49,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=435, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-06-14 12:50:49,416 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-14 12:50:49,416 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 435 flow [2024-06-14 12:50:49,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:49,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:49,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:49,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:50:49,417 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 12:50:49,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:49,417 INFO L85 PathProgramCache]: Analyzing trace with hash 248333667, now seen corresponding path program 1 times [2024-06-14 12:50:49,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:49,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275507687] [2024-06-14 12:50:49,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:49,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:51,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:51,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275507687] [2024-06-14 12:50:51,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275507687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:51,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:51,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:50:51,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587973559] [2024-06-14 12:50:51,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:51,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:50:51,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:51,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:50:51,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:50:51,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:50:51,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 435 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:51,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:51,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:50:51,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:53,163 INFO L124 PetriNetUnfolderBase]: 2219/3317 cut-off events. [2024-06-14 12:50:53,163 INFO L125 PetriNetUnfolderBase]: For 12855/12857 co-relation queries the response was YES. [2024-06-14 12:50:53,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12396 conditions, 3317 events. 2219/3317 cut-off events. For 12855/12857 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16156 event pairs, 571 based on Foata normal form. 22/3338 useless extension candidates. Maximal degree in co-relation 12365. Up to 2314 conditions per place. [2024-06-14 12:50:53,175 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 111 selfloop transitions, 57 changer transitions 0/172 dead transitions. [2024-06-14 12:50:53,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 172 transitions, 1318 flow [2024-06-14 12:50:53,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:50:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:50:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-14 12:50:53,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-14 12:50:53,177 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 435 flow. Second operand 11 states and 216 transitions. [2024-06-14 12:50:53,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 172 transitions, 1318 flow [2024-06-14 12:50:53,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 172 transitions, 1183 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:53,187 INFO L231 Difference]: Finished difference. Result has 81 places, 103 transitions, 778 flow [2024-06-14 12:50:53,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=778, PETRI_PLACES=81, PETRI_TRANSITIONS=103} [2024-06-14 12:50:53,188 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-14 12:50:53,188 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 103 transitions, 778 flow [2024-06-14 12:50:53,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:53,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:53,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:53,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:50:53,189 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 12:50:53,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:53,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2076665861, now seen corresponding path program 2 times [2024-06-14 12:50:53,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:53,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693663661] [2024-06-14 12:50:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:53,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:55,748 INFO 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 12:50:55,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:55,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693663661] [2024-06-14 12:50:55,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693663661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:55,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:55,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:50:55,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315023054] [2024-06-14 12:50:55,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:55,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:50:55,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:55,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:50:55,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:50:55,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:50:55,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 103 transitions, 778 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:55,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:55,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:50:55,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:57,343 INFO L124 PetriNetUnfolderBase]: 2651/3925 cut-off events. [2024-06-14 12:50:57,343 INFO L125 PetriNetUnfolderBase]: For 20932/20936 co-relation queries the response was YES. [2024-06-14 12:50:57,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17585 conditions, 3925 events. 2651/3925 cut-off events. For 20932/20936 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19319 event pairs, 600 based on Foata normal form. 38/3962 useless extension candidates. Maximal degree in co-relation 17547. Up to 2554 conditions per place. [2024-06-14 12:50:57,366 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 91 selfloop transitions, 76 changer transitions 0/171 dead transitions. [2024-06-14 12:50:57,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 171 transitions, 1490 flow [2024-06-14 12:50:57,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 12:50:57,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 12:50:57,368 INFO L175 Difference]: Start difference. First operand has 81 places, 103 transitions, 778 flow. Second operand 9 states and 172 transitions. [2024-06-14 12:50:57,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 171 transitions, 1490 flow [2024-06-14 12:50:57,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 171 transitions, 1447 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 12:50:57,388 INFO L231 Difference]: Finished difference. Result has 90 places, 122 transitions, 1108 flow [2024-06-14 12:50:57,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1108, PETRI_PLACES=90, PETRI_TRANSITIONS=122} [2024-06-14 12:50:57,389 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-14 12:50:57,389 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 122 transitions, 1108 flow [2024-06-14 12:50:57,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:57,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:57,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:57,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:50:57,390 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 12:50:57,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:57,390 INFO L85 PathProgramCache]: Analyzing trace with hash -437216605, now seen corresponding path program 3 times [2024-06-14 12:50:57,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:57,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693907748] [2024-06-14 12:50:57,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:57,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:59,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:59,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693907748] [2024-06-14 12:50:59,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693907748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:59,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:59,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:50:59,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556261488] [2024-06-14 12:50:59,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:59,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:50:59,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:59,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:50:59,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:50:59,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:50:59,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 122 transitions, 1108 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:59,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:59,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:50:59,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:01,253 INFO L124 PetriNetUnfolderBase]: 2679/3984 cut-off events. [2024-06-14 12:51:01,253 INFO L125 PetriNetUnfolderBase]: For 27500/27502 co-relation queries the response was YES. [2024-06-14 12:51:01,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20279 conditions, 3984 events. 2679/3984 cut-off events. For 27500/27502 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 19724 event pairs, 682 based on Foata normal form. 18/3996 useless extension candidates. Maximal degree in co-relation 20237. Up to 3501 conditions per place. [2024-06-14 12:51:01,274 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 114 selfloop transitions, 52 changer transitions 0/170 dead transitions. [2024-06-14 12:51:01,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 170 transitions, 1724 flow [2024-06-14 12:51:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:01,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:01,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:51:01,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:51:01,276 INFO L175 Difference]: Start difference. First operand has 90 places, 122 transitions, 1108 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:51:01,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 170 transitions, 1724 flow [2024-06-14 12:51:01,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 170 transitions, 1597 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:01,313 INFO L231 Difference]: Finished difference. Result has 94 places, 136 transitions, 1267 flow [2024-06-14 12:51:01,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1267, PETRI_PLACES=94, PETRI_TRANSITIONS=136} [2024-06-14 12:51:01,314 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-14 12:51:01,314 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 136 transitions, 1267 flow [2024-06-14 12:51:01,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:01,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:01,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:01,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:51:01,315 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 12:51:01,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:01,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2040932765, now seen corresponding path program 4 times [2024-06-14 12:51:01,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:01,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5778034] [2024-06-14 12:51:01,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:01,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:03,475 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 12:51:03,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:03,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5778034] [2024-06-14 12:51:03,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5778034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:03,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:03,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:51:03,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681029788] [2024-06-14 12:51:03,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:03,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:51:03,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:03,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:51:03,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:51:03,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:03,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 136 transitions, 1267 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:03,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:03,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:03,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:05,092 INFO L124 PetriNetUnfolderBase]: 2669/3952 cut-off events. [2024-06-14 12:51:05,092 INFO L125 PetriNetUnfolderBase]: For 30864/30866 co-relation queries the response was YES. [2024-06-14 12:51:05,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20241 conditions, 3952 events. 2669/3952 cut-off events. For 30864/30866 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19298 event pairs, 680 based on Foata normal form. 4/3950 useless extension candidates. Maximal degree in co-relation 20197. Up to 3377 conditions per place. [2024-06-14 12:51:05,128 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 150 selfloop transitions, 55 changer transitions 0/209 dead transitions. [2024-06-14 12:51:05,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 209 transitions, 2265 flow [2024-06-14 12:51:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:51:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:51:05,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:51:05,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:51:05,130 INFO L175 Difference]: Start difference. First operand has 94 places, 136 transitions, 1267 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:51:05,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 209 transitions, 2265 flow [2024-06-14 12:51:05,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 209 transitions, 2084 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:05,171 INFO L231 Difference]: Finished difference. Result has 99 places, 175 transitions, 1761 flow [2024-06-14 12:51:05,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1761, PETRI_PLACES=99, PETRI_TRANSITIONS=175} [2024-06-14 12:51:05,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-14 12:51:05,172 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 175 transitions, 1761 flow [2024-06-14 12:51:05,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:05,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:05,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:05,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:51:05,173 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 12:51:05,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:05,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2040923837, now seen corresponding path program 1 times [2024-06-14 12:51:05,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:05,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054732370] [2024-06-14 12:51:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:05,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:07,768 INFO 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 12:51:07,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:07,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054732370] [2024-06-14 12:51:07,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054732370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:07,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:07,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:07,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701365560] [2024-06-14 12:51:07,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:07,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:07,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:07,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:07,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:07,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:07,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 175 transitions, 1761 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:07,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:07,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:07,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:09,289 INFO L124 PetriNetUnfolderBase]: 2661/3959 cut-off events. [2024-06-14 12:51:09,289 INFO L125 PetriNetUnfolderBase]: For 32458/32460 co-relation queries the response was YES. [2024-06-14 12:51:09,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20939 conditions, 3959 events. 2661/3959 cut-off events. For 32458/32460 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19490 event pairs, 782 based on Foata normal form. 4/3962 useless extension candidates. Maximal degree in co-relation 20891. Up to 3825 conditions per place. [2024-06-14 12:51:09,314 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 186 selfloop transitions, 13 changer transitions 0/203 dead transitions. [2024-06-14 12:51:09,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 203 transitions, 2259 flow [2024-06-14 12:51:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:51:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:51:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:51:09,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-14 12:51:09,316 INFO L175 Difference]: Start difference. First operand has 99 places, 175 transitions, 1761 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:51:09,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 203 transitions, 2259 flow [2024-06-14 12:51:09,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 203 transitions, 2229 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-14 12:51:09,360 INFO L231 Difference]: Finished difference. Result has 105 places, 177 transitions, 1788 flow [2024-06-14 12:51:09,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1733, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1788, PETRI_PLACES=105, PETRI_TRANSITIONS=177} [2024-06-14 12:51:09,361 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 61 predicate places. [2024-06-14 12:51:09,361 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 177 transitions, 1788 flow [2024-06-14 12:51:09,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:09,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:09,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:09,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:51:09,362 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 12:51:09,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:09,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1305961036, now seen corresponding path program 1 times [2024-06-14 12:51:09,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:09,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719534687] [2024-06-14 12:51:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:09,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:11,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719534687] [2024-06-14 12:51:11,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719534687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:11,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:11,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:51:11,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327977969] [2024-06-14 12:51:11,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:11,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:51:11,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:11,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:51:11,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:51:11,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:11,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 177 transitions, 1788 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:11,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:11,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:11,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:12,954 INFO L124 PetriNetUnfolderBase]: 2853/4270 cut-off events. [2024-06-14 12:51:12,954 INFO L125 PetriNetUnfolderBase]: For 39257/39265 co-relation queries the response was YES. [2024-06-14 12:51:12,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22825 conditions, 4270 events. 2853/4270 cut-off events. For 39257/39265 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21672 event pairs, 611 based on Foata normal form. 26/4295 useless extension candidates. Maximal degree in co-relation 22774. Up to 2695 conditions per place. [2024-06-14 12:51:12,980 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 109 selfloop transitions, 125 changer transitions 0/238 dead transitions. [2024-06-14 12:51:12,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 238 transitions, 2721 flow [2024-06-14 12:51:12,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:51:12,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 12:51:12,982 INFO L175 Difference]: Start difference. First operand has 105 places, 177 transitions, 1788 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:51:12,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 238 transitions, 2721 flow [2024-06-14 12:51:13,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 238 transitions, 2686 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:13,037 INFO L231 Difference]: Finished difference. Result has 109 places, 198 transitions, 2317 flow [2024-06-14 12:51:13,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1753, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2317, PETRI_PLACES=109, PETRI_TRANSITIONS=198} [2024-06-14 12:51:13,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-14 12:51:13,038 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 198 transitions, 2317 flow [2024-06-14 12:51:13,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:13,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:13,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:13,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:51:13,038 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 12:51:13,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:13,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1712072528, now seen corresponding path program 2 times [2024-06-14 12:51:13,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:13,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134837839] [2024-06-14 12:51:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:13,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:15,352 INFO 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 12:51:15,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:15,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134837839] [2024-06-14 12:51:15,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134837839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:15,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:15,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:51:15,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532538030] [2024-06-14 12:51:15,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:15,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:51:15,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:15,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:51:15,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:51:15,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:15,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 198 transitions, 2317 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:15,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:15,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:15,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:16,876 INFO L124 PetriNetUnfolderBase]: 2813/4229 cut-off events. [2024-06-14 12:51:16,876 INFO L125 PetriNetUnfolderBase]: For 45986/45998 co-relation queries the response was YES. [2024-06-14 12:51:16,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24200 conditions, 4229 events. 2813/4229 cut-off events. For 45986/45998 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21578 event pairs, 682 based on Foata normal form. 32/4260 useless extension candidates. Maximal degree in co-relation 24147. Up to 2673 conditions per place. [2024-06-14 12:51:16,899 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 116 selfloop transitions, 137 changer transitions 0/257 dead transitions. [2024-06-14 12:51:16,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 257 transitions, 3141 flow [2024-06-14 12:51:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:16,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-14 12:51:16,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-14 12:51:16,900 INFO L175 Difference]: Start difference. First operand has 109 places, 198 transitions, 2317 flow. Second operand 9 states and 180 transitions. [2024-06-14 12:51:16,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 257 transitions, 3141 flow [2024-06-14 12:51:16,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 257 transitions, 3009 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-14 12:51:16,973 INFO L231 Difference]: Finished difference. Result has 117 places, 203 transitions, 2661 flow [2024-06-14 12:51:16,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2661, PETRI_PLACES=117, PETRI_TRANSITIONS=203} [2024-06-14 12:51:16,973 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-14 12:51:16,973 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 203 transitions, 2661 flow [2024-06-14 12:51:16,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:16,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:16,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:16,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:51:16,974 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 12:51:16,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:16,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1240960610, now seen corresponding path program 3 times [2024-06-14 12:51:16,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:16,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528710989] [2024-06-14 12:51:16,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:16,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:19,257 INFO 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 12:51:19,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:19,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528710989] [2024-06-14 12:51:19,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528710989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:19,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:19,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:51:19,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306369424] [2024-06-14 12:51:19,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:19,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:51:19,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:19,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:51:19,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:51:19,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:19,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 203 transitions, 2661 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:19,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:19,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:19,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:20,825 INFO L124 PetriNetUnfolderBase]: 2803/4202 cut-off events. [2024-06-14 12:51:20,826 INFO L125 PetriNetUnfolderBase]: For 51701/51717 co-relation queries the response was YES. [2024-06-14 12:51:20,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26171 conditions, 4202 events. 2803/4202 cut-off events. For 51701/51717 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21119 event pairs, 712 based on Foata normal form. 13/4209 useless extension candidates. Maximal degree in co-relation 26114. Up to 3557 conditions per place. [2024-06-14 12:51:20,856 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 177 selfloop transitions, 53 changer transitions 0/234 dead transitions. [2024-06-14 12:51:20,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 234 transitions, 3256 flow [2024-06-14 12:51:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:51:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:51:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 12:51:20,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 12:51:20,858 INFO L175 Difference]: Start difference. First operand has 117 places, 203 transitions, 2661 flow. Second operand 7 states and 124 transitions. [2024-06-14 12:51:20,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 234 transitions, 3256 flow [2024-06-14 12:51:20,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 234 transitions, 2983 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 12:51:20,945 INFO L231 Difference]: Finished difference. Result has 118 places, 206 transitions, 2571 flow [2024-06-14 12:51:20,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2571, PETRI_PLACES=118, PETRI_TRANSITIONS=206} [2024-06-14 12:51:20,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-14 12:51:20,946 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 206 transitions, 2571 flow [2024-06-14 12:51:20,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:20,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:20,946 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 12:51:20,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:51:20,946 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 12:51:20,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:20,946 INFO L85 PathProgramCache]: Analyzing trace with hash 732494130, now seen corresponding path program 1 times [2024-06-14 12:51:20,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:20,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273750828] [2024-06-14 12:51:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:20,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:23,272 INFO 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 12:51:23,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:23,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273750828] [2024-06-14 12:51:23,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273750828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:23,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:23,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:51:23,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919302241] [2024-06-14 12:51:23,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:23,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:51:23,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:23,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:51:23,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:51:23,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:23,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 206 transitions, 2571 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:23,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:23,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:23,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:24,545 INFO L124 PetriNetUnfolderBase]: 2831/4248 cut-off events. [2024-06-14 12:51:24,545 INFO L125 PetriNetUnfolderBase]: For 53873/53881 co-relation queries the response was YES. [2024-06-14 12:51:24,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25916 conditions, 4248 events. 2831/4248 cut-off events. For 53873/53881 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 21625 event pairs, 571 based on Foata normal form. 12/4259 useless extension candidates. Maximal degree in co-relation 25858. Up to 3688 conditions per place. [2024-06-14 12:51:24,569 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 189 selfloop transitions, 50 changer transitions 0/243 dead transitions. [2024-06-14 12:51:24,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 243 transitions, 3285 flow [2024-06-14 12:51:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:51:24,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:51:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 12:51:24,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-14 12:51:24,571 INFO L175 Difference]: Start difference. First operand has 118 places, 206 transitions, 2571 flow. Second operand 7 states and 130 transitions. [2024-06-14 12:51:24,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 243 transitions, 3285 flow [2024-06-14 12:51:24,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 243 transitions, 3225 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 12:51:24,642 INFO L231 Difference]: Finished difference. Result has 122 places, 210 transitions, 2678 flow [2024-06-14 12:51:24,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2678, PETRI_PLACES=122, PETRI_TRANSITIONS=210} [2024-06-14 12:51:24,642 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-14 12:51:24,642 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 210 transitions, 2678 flow [2024-06-14 12:51:24,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:24,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:24,642 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 12:51:24,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:51:24,643 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 12:51:24,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:24,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1599327544, now seen corresponding path program 2 times [2024-06-14 12:51:24,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:24,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218773942] [2024-06-14 12:51:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:24,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:26,944 INFO 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 12:51:26,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:26,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218773942] [2024-06-14 12:51:26,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218773942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:26,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:26,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:51:26,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970598933] [2024-06-14 12:51:26,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:26,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:51:26,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:26,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:51:26,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:51:26,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:26,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 210 transitions, 2678 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:26,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:26,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:26,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:28,453 INFO L124 PetriNetUnfolderBase]: 2818/4222 cut-off events. [2024-06-14 12:51:28,454 INFO L125 PetriNetUnfolderBase]: For 58520/58524 co-relation queries the response was YES. [2024-06-14 12:51:28,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25997 conditions, 4222 events. 2818/4222 cut-off events. For 58520/58524 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21380 event pairs, 746 based on Foata normal form. 8/4229 useless extension candidates. Maximal degree in co-relation 25937. Up to 3818 conditions per place. [2024-06-14 12:51:28,483 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 180 selfloop transitions, 57 changer transitions 0/241 dead transitions. [2024-06-14 12:51:28,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 241 transitions, 3267 flow [2024-06-14 12:51:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:51:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:51:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 12:51:28,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 12:51:28,485 INFO L175 Difference]: Start difference. First operand has 122 places, 210 transitions, 2678 flow. Second operand 7 states and 128 transitions. [2024-06-14 12:51:28,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 241 transitions, 3267 flow [2024-06-14 12:51:28,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 241 transitions, 3179 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 12:51:28,568 INFO L231 Difference]: Finished difference. Result has 126 places, 210 transitions, 2716 flow [2024-06-14 12:51:28,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2716, PETRI_PLACES=126, PETRI_TRANSITIONS=210} [2024-06-14 12:51:28,568 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-14 12:51:28,568 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 210 transitions, 2716 flow [2024-06-14 12:51:28,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:28,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:28,569 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 12:51:28,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:51:28,569 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 12:51:28,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1483851676, now seen corresponding path program 1 times [2024-06-14 12:51:28,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:28,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534409209] [2024-06-14 12:51:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:28,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:31,615 INFO 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 12:51:31,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:31,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534409209] [2024-06-14 12:51:31,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534409209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:31,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:31,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:31,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128585269] [2024-06-14 12:51:31,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:31,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:31,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:31,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:31,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:31,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:31,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 210 transitions, 2716 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:31,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:31,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:31,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:33,308 INFO L124 PetriNetUnfolderBase]: 3218/4880 cut-off events. [2024-06-14 12:51:33,308 INFO L125 PetriNetUnfolderBase]: For 80020/80024 co-relation queries the response was YES. [2024-06-14 12:51:33,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28753 conditions, 4880 events. 3218/4880 cut-off events. For 80020/80024 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25855 event pairs, 698 based on Foata normal form. 94/4973 useless extension candidates. Maximal degree in co-relation 28691. Up to 2588 conditions per place. [2024-06-14 12:51:33,351 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 123 selfloop transitions, 143 changer transitions 0/270 dead transitions. [2024-06-14 12:51:33,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 270 transitions, 3555 flow [2024-06-14 12:51:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:51:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:51:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 12:51:33,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-14 12:51:33,353 INFO L175 Difference]: Start difference. First operand has 126 places, 210 transitions, 2716 flow. Second operand 10 states and 194 transitions. [2024-06-14 12:51:33,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 270 transitions, 3555 flow [2024-06-14 12:51:33,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 270 transitions, 3430 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 12:51:33,438 INFO L231 Difference]: Finished difference. Result has 130 places, 213 transitions, 2953 flow [2024-06-14 12:51:33,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2591, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2953, PETRI_PLACES=130, PETRI_TRANSITIONS=213} [2024-06-14 12:51:33,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-14 12:51:33,438 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 213 transitions, 2953 flow [2024-06-14 12:51:33,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:33,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:33,439 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 12:51:33,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:51:33,439 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 12:51:33,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:33,439 INFO L85 PathProgramCache]: Analyzing trace with hash 969587296, now seen corresponding path program 2 times [2024-06-14 12:51:33,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:33,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294188188] [2024-06-14 12:51:33,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:33,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:33,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:36,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:36,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294188188] [2024-06-14 12:51:36,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294188188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:36,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:36,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:36,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457846601] [2024-06-14 12:51:36,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:36,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:36,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:36,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:36,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:36,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 213 transitions, 2953 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:36,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:36,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:36,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:37,949 INFO L124 PetriNetUnfolderBase]: 3238/4905 cut-off events. [2024-06-14 12:51:37,949 INFO L125 PetriNetUnfolderBase]: For 75437/75439 co-relation queries the response was YES. [2024-06-14 12:51:37,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30461 conditions, 4905 events. 3238/4905 cut-off events. For 75437/75439 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25761 event pairs, 856 based on Foata normal form. 4/4903 useless extension candidates. Maximal degree in co-relation 30398. Up to 4256 conditions per place. [2024-06-14 12:51:37,981 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 64 changer transitions 0/251 dead transitions. [2024-06-14 12:51:37,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 251 transitions, 3597 flow [2024-06-14 12:51:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:51:37,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:51:37,983 INFO L175 Difference]: Start difference. First operand has 130 places, 213 transitions, 2953 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:51:37,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 251 transitions, 3597 flow [2024-06-14 12:51:38,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 251 transitions, 3293 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 12:51:38,085 INFO L231 Difference]: Finished difference. Result has 130 places, 215 transitions, 2820 flow [2024-06-14 12:51:38,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2820, PETRI_PLACES=130, PETRI_TRANSITIONS=215} [2024-06-14 12:51:38,086 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-14 12:51:38,086 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 215 transitions, 2820 flow [2024-06-14 12:51:38,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:38,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:38,086 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 12:51:38,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:51:38,086 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 12:51:38,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:38,086 INFO L85 PathProgramCache]: Analyzing trace with hash -640285002, now seen corresponding path program 3 times [2024-06-14 12:51:38,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:38,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276155621] [2024-06-14 12:51:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:38,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:41,180 INFO 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 12:51:41,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:41,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276155621] [2024-06-14 12:51:41,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276155621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:41,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:41,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:41,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077032412] [2024-06-14 12:51:41,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:41,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:41,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:41,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:41,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:41,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:41,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 215 transitions, 2820 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 12:51:41,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:41,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:41,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:42,729 INFO L124 PetriNetUnfolderBase]: 3258/4945 cut-off events. [2024-06-14 12:51:42,729 INFO L125 PetriNetUnfolderBase]: For 75767/75769 co-relation queries the response was YES. [2024-06-14 12:51:42,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29852 conditions, 4945 events. 3258/4945 cut-off events. For 75767/75769 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 26147 event pairs, 811 based on Foata normal form. 4/4943 useless extension candidates. Maximal degree in co-relation 29788. Up to 3998 conditions per place. [2024-06-14 12:51:42,760 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 187 selfloop transitions, 71 changer transitions 0/262 dead transitions. [2024-06-14 12:51:42,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 262 transitions, 3634 flow [2024-06-14 12:51:42,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:42,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:51:42,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 12:51:42,761 INFO L175 Difference]: Start difference. First operand has 130 places, 215 transitions, 2820 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:51:42,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 262 transitions, 3634 flow [2024-06-14 12:51:42,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 262 transitions, 3483 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:51:42,857 INFO L231 Difference]: Finished difference. Result has 133 places, 220 transitions, 2918 flow [2024-06-14 12:51:42,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2918, PETRI_PLACES=133, PETRI_TRANSITIONS=220} [2024-06-14 12:51:42,858 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-14 12:51:42,858 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 220 transitions, 2918 flow [2024-06-14 12:51:42,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 12:51:42,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:42,858 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 12:51:42,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:51:42,858 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 12:51:42,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:42,858 INFO L85 PathProgramCache]: Analyzing trace with hash -876757032, now seen corresponding path program 4 times [2024-06-14 12:51:42,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:42,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702733578] [2024-06-14 12:51:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:42,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:46,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:46,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702733578] [2024-06-14 12:51:46,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702733578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:46,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:46,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:46,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744080670] [2024-06-14 12:51:46,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:46,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:46,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:46,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:46,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:46,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:46,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 220 transitions, 2918 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 12:51:46,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:46,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:46,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:47,812 INFO L124 PetriNetUnfolderBase]: 3318/5057 cut-off events. [2024-06-14 12:51:47,812 INFO L125 PetriNetUnfolderBase]: For 86010/86012 co-relation queries the response was YES. [2024-06-14 12:51:47,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30856 conditions, 5057 events. 3318/5057 cut-off events. For 86010/86012 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 27093 event pairs, 889 based on Foata normal form. 18/5069 useless extension candidates. Maximal degree in co-relation 30790. Up to 4412 conditions per place. [2024-06-14 12:51:47,850 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 183 selfloop transitions, 78 changer transitions 0/265 dead transitions. [2024-06-14 12:51:47,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 265 transitions, 3669 flow [2024-06-14 12:51:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 12:51:47,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 12:51:47,852 INFO L175 Difference]: Start difference. First operand has 133 places, 220 transitions, 2918 flow. Second operand 9 states and 164 transitions. [2024-06-14 12:51:47,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 265 transitions, 3669 flow [2024-06-14 12:51:47,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 265 transitions, 3540 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 12:51:47,989 INFO L231 Difference]: Finished difference. Result has 138 places, 222 transitions, 3008 flow [2024-06-14 12:51:47,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3008, PETRI_PLACES=138, PETRI_TRANSITIONS=222} [2024-06-14 12:51:47,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-14 12:51:47,990 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 222 transitions, 3008 flow [2024-06-14 12:51:47,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 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 12:51:47,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:47,990 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 12:51:47,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:51:47,990 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:47,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:47,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1251941082, now seen corresponding path program 1 times [2024-06-14 12:51:47,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:47,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226823692] [2024-06-14 12:51:47,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:47,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:50,109 INFO 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 12:51:50,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:50,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226823692] [2024-06-14 12:51:50,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226823692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:50,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:50,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:51:50,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095172368] [2024-06-14 12:51:50,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:50,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:51:50,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:50,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:51:50,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:51:50,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:50,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 222 transitions, 3008 flow. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:50,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:50,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:50,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:51,406 INFO L124 PetriNetUnfolderBase]: 3312/5050 cut-off events. [2024-06-14 12:51:51,406 INFO L125 PetriNetUnfolderBase]: For 85819/85821 co-relation queries the response was YES. [2024-06-14 12:51:51,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31320 conditions, 5050 events. 3312/5050 cut-off events. For 85819/85821 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 27065 event pairs, 1028 based on Foata normal form. 2/5051 useless extension candidates. Maximal degree in co-relation 31252. Up to 4918 conditions per place. [2024-06-14 12:51:51,444 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 222 selfloop transitions, 10 changer transitions 0/236 dead transitions. [2024-06-14 12:51:51,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 236 transitions, 3532 flow [2024-06-14 12:51:51,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:51:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:51:51,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-14 12:51:51,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386046511627907 [2024-06-14 12:51:51,446 INFO L175 Difference]: Start difference. First operand has 138 places, 222 transitions, 3008 flow. Second operand 5 states and 83 transitions. [2024-06-14 12:51:51,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 236 transitions, 3532 flow [2024-06-14 12:51:51,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 236 transitions, 3338 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 12:51:51,572 INFO L231 Difference]: Finished difference. Result has 136 places, 225 transitions, 2874 flow [2024-06-14 12:51:51,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2814, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2874, PETRI_PLACES=136, PETRI_TRANSITIONS=225} [2024-06-14 12:51:51,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-14 12:51:51,572 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 225 transitions, 2874 flow [2024-06-14 12:51:51,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:51,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:51,573 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 12:51:51,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:51:51,573 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 12:51:51,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:51,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1871889413, now seen corresponding path program 1 times [2024-06-14 12:51:51,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:51,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475925021] [2024-06-14 12:51:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:51,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:54,314 INFO 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 12:51:54,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:54,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475925021] [2024-06-14 12:51:54,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475925021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:54,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:54,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:54,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058865328] [2024-06-14 12:51:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:54,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:54,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:54,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:54,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 225 transitions, 2874 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:54,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:54,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:54,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:56,272 INFO L124 PetriNetUnfolderBase]: 4507/6950 cut-off events. [2024-06-14 12:51:56,272 INFO L125 PetriNetUnfolderBase]: For 155903/155911 co-relation queries the response was YES. [2024-06-14 12:51:56,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41667 conditions, 6950 events. 4507/6950 cut-off events. For 155903/155911 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 40422 event pairs, 919 based on Foata normal form. 78/7027 useless extension candidates. Maximal degree in co-relation 41598. Up to 2587 conditions per place. [2024-06-14 12:51:56,326 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 180 selfloop transitions, 126 changer transitions 0/310 dead transitions. [2024-06-14 12:51:56,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 310 transitions, 4146 flow [2024-06-14 12:51:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:56,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 12:51:56,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49870801033591733 [2024-06-14 12:51:56,328 INFO L175 Difference]: Start difference. First operand has 136 places, 225 transitions, 2874 flow. Second operand 9 states and 193 transitions. [2024-06-14 12:51:56,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 310 transitions, 4146 flow [2024-06-14 12:51:56,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 310 transitions, 4108 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 12:51:56,527 INFO L231 Difference]: Finished difference. Result has 144 places, 235 transitions, 3364 flow [2024-06-14 12:51:56,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2836, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3364, PETRI_PLACES=144, PETRI_TRANSITIONS=235} [2024-06-14 12:51:56,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-14 12:51:56,527 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 235 transitions, 3364 flow [2024-06-14 12:51:56,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:56,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:56,528 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 12:51:56,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:51:56,528 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 12:51:56,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:56,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1118887363, now seen corresponding path program 2 times [2024-06-14 12:51:56,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:56,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273923358] [2024-06-14 12:51:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:56,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:59,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:59,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273923358] [2024-06-14 12:51:59,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273923358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:59,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:59,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:51:59,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958068833] [2024-06-14 12:51:59,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:59,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:51:59,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:59,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:51:59,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:51:59,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:51:59,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 235 transitions, 3364 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:59,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:59,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:51:59,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:01,683 INFO L124 PetriNetUnfolderBase]: 5183/8025 cut-off events. [2024-06-14 12:52:01,683 INFO L125 PetriNetUnfolderBase]: For 207488/207492 co-relation queries the response was YES. [2024-06-14 12:52:01,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49779 conditions, 8025 events. 5183/8025 cut-off events. For 207488/207492 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 48366 event pairs, 1505 based on Foata normal form. 74/8098 useless extension candidates. Maximal degree in co-relation 49707. Up to 4493 conditions per place. [2024-06-14 12:52:01,744 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 161 selfloop transitions, 146 changer transitions 0/311 dead transitions. [2024-06-14 12:52:01,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 311 transitions, 4506 flow [2024-06-14 12:52:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:52:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:52:01,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 12:52:01,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-14 12:52:01,746 INFO L175 Difference]: Start difference. First operand has 144 places, 235 transitions, 3364 flow. Second operand 10 states and 205 transitions. [2024-06-14 12:52:01,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 311 transitions, 4506 flow [2024-06-14 12:52:02,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 311 transitions, 4284 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-14 12:52:02,056 INFO L231 Difference]: Finished difference. Result has 151 places, 242 transitions, 3634 flow [2024-06-14 12:52:02,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3146, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3634, PETRI_PLACES=151, PETRI_TRANSITIONS=242} [2024-06-14 12:52:02,056 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-14 12:52:02,056 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 242 transitions, 3634 flow [2024-06-14 12:52:02,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:02,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:02,057 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 12:52:02,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:52:02,057 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 12:52:02,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:02,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1839828389, now seen corresponding path program 3 times [2024-06-14 12:52:02,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:02,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95968475] [2024-06-14 12:52:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:02,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:04,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:04,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95968475] [2024-06-14 12:52:04,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95968475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:04,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:04,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:52:04,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865195054] [2024-06-14 12:52:04,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:04,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:52:04,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:04,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:52:04,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:52:04,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:52:04,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 242 transitions, 3634 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:04,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:04,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:52:04,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:07,306 INFO L124 PetriNetUnfolderBase]: 5792/9077 cut-off events. [2024-06-14 12:52:07,306 INFO L125 PetriNetUnfolderBase]: For 246626/246638 co-relation queries the response was YES. [2024-06-14 12:52:07,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56665 conditions, 9077 events. 5792/9077 cut-off events. For 246626/246638 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 57262 event pairs, 1642 based on Foata normal form. 76/9152 useless extension candidates. Maximal degree in co-relation 56590. Up to 5897 conditions per place. [2024-06-14 12:52:07,370 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 175 selfloop transitions, 144 changer transitions 0/323 dead transitions. [2024-06-14 12:52:07,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 323 transitions, 4860 flow [2024-06-14 12:52:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:52:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:52:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 12:52:07,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2024-06-14 12:52:07,371 INFO L175 Difference]: Start difference. First operand has 151 places, 242 transitions, 3634 flow. Second operand 10 states and 209 transitions. [2024-06-14 12:52:07,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 323 transitions, 4860 flow [2024-06-14 12:52:07,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 323 transitions, 4528 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:07,737 INFO L231 Difference]: Finished difference. Result has 155 places, 248 transitions, 3751 flow [2024-06-14 12:52:07,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3751, PETRI_PLACES=155, PETRI_TRANSITIONS=248} [2024-06-14 12:52:07,738 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-14 12:52:07,739 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 248 transitions, 3751 flow [2024-06-14 12:52:07,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:07,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:07,739 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 12:52:07,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:52:07,739 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 12:52:07,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:07,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1834318139, now seen corresponding path program 4 times [2024-06-14 12:52:07,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:07,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377633987] [2024-06-14 12:52:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:07,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:10,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:10,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377633987] [2024-06-14 12:52:10,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377633987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:10,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:10,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:52:10,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052664102] [2024-06-14 12:52:10,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:10,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:52:10,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:10,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:52:10,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:52:10,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:52:10,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 248 transitions, 3751 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:10,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:10,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:52:10,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:13,053 INFO L124 PetriNetUnfolderBase]: 6104/9590 cut-off events. [2024-06-14 12:52:13,053 INFO L125 PetriNetUnfolderBase]: For 262781/262789 co-relation queries the response was YES. [2024-06-14 12:52:13,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58824 conditions, 9590 events. 6104/9590 cut-off events. For 262781/262789 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61500 event pairs, 2143 based on Foata normal form. 80/9669 useless extension candidates. Maximal degree in co-relation 58747. Up to 7436 conditions per place. [2024-06-14 12:52:13,132 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 164 selfloop transitions, 131 changer transitions 0/299 dead transitions. [2024-06-14 12:52:13,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 299 transitions, 4601 flow [2024-06-14 12:52:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:52:13,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 12:52:13,133 INFO L175 Difference]: Start difference. First operand has 155 places, 248 transitions, 3751 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:52:13,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 299 transitions, 4601 flow [2024-06-14 12:52:13,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 299 transitions, 4361 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:52:13,489 INFO L231 Difference]: Finished difference. Result has 158 places, 250 transitions, 3847 flow [2024-06-14 12:52:13,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3847, PETRI_PLACES=158, PETRI_TRANSITIONS=250} [2024-06-14 12:52:13,490 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-14 12:52:13,490 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 250 transitions, 3847 flow [2024-06-14 12:52:13,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:13,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:13,490 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 12:52:13,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:52:13,490 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:13,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:13,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1239662017, now seen corresponding path program 5 times [2024-06-14 12:52:13,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:13,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588558522] [2024-06-14 12:52:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:13,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:16,327 INFO 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 12:52:16,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588558522] [2024-06-14 12:52:16,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588558522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:16,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:16,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:52:16,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249114813] [2024-06-14 12:52:16,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:16,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:52:16,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:16,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:52:16,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:52:16,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:52:16,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 250 transitions, 3847 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:16,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:16,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:52:16,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:19,138 INFO L124 PetriNetUnfolderBase]: 6233/9832 cut-off events. [2024-06-14 12:52:19,138 INFO L125 PetriNetUnfolderBase]: For 266246/266258 co-relation queries the response was YES. [2024-06-14 12:52:19,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59407 conditions, 9832 events. 6233/9832 cut-off events. For 266246/266258 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 63710 event pairs, 2316 based on Foata normal form. 86/9917 useless extension candidates. Maximal degree in co-relation 59328. Up to 7667 conditions per place. [2024-06-14 12:52:19,209 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 173 selfloop transitions, 141 changer transitions 0/318 dead transitions. [2024-06-14 12:52:19,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 318 transitions, 4861 flow [2024-06-14 12:52:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:52:19,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:52:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-14 12:52:19,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-14 12:52:19,211 INFO L175 Difference]: Start difference. First operand has 158 places, 250 transitions, 3847 flow. Second operand 10 states and 202 transitions. [2024-06-14 12:52:19,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 318 transitions, 4861 flow [2024-06-14 12:52:19,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 318 transitions, 4577 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:19,606 INFO L231 Difference]: Finished difference. Result has 161 places, 252 transitions, 3919 flow [2024-06-14 12:52:19,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3563, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3919, PETRI_PLACES=161, PETRI_TRANSITIONS=252} [2024-06-14 12:52:19,610 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-14 12:52:19,610 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 252 transitions, 3919 flow [2024-06-14 12:52:19,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:19,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:19,610 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 12:52:19,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:52:19,611 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 12:52:19,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:19,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1245239599, now seen corresponding path program 1 times [2024-06-14 12:52:19,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:19,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248464287] [2024-06-14 12:52:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:19,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:22,898 INFO 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 12:52:22,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:22,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248464287] [2024-06-14 12:52:22,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248464287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:22,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:22,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:22,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715850719] [2024-06-14 12:52:22,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:22,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:22,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:22,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:22,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:52:22,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 252 transitions, 3919 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 12:52:22,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:22,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:52:22,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:25,344 INFO L124 PetriNetUnfolderBase]: 6344/10060 cut-off events. [2024-06-14 12:52:25,345 INFO L125 PetriNetUnfolderBase]: For 267546/267554 co-relation queries the response was YES. [2024-06-14 12:52:25,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59823 conditions, 10060 events. 6344/10060 cut-off events. For 267546/267554 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 65868 event pairs, 2050 based on Foata normal form. 60/10119 useless extension candidates. Maximal degree in co-relation 59743. Up to 5962 conditions per place. [2024-06-14 12:52:25,427 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 166 selfloop transitions, 137 changer transitions 0/307 dead transitions. [2024-06-14 12:52:25,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 307 transitions, 4791 flow [2024-06-14 12:52:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:25,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 12:52:25,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-14 12:52:25,428 INFO L175 Difference]: Start difference. First operand has 161 places, 252 transitions, 3919 flow. Second operand 9 states and 177 transitions. [2024-06-14 12:52:25,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 307 transitions, 4791 flow [2024-06-14 12:52:25,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 307 transitions, 4483 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 12:52:25,854 INFO L231 Difference]: Finished difference. Result has 162 places, 253 transitions, 3931 flow [2024-06-14 12:52:25,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3611, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3931, PETRI_PLACES=162, PETRI_TRANSITIONS=253} [2024-06-14 12:52:25,855 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-14 12:52:25,855 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 253 transitions, 3931 flow [2024-06-14 12:52:25,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 12:52:25,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:25,855 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 12:52:25,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:52:25,855 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 12:52:25,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:25,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1637423449, now seen corresponding path program 6 times [2024-06-14 12:52:25,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:25,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784965754] [2024-06-14 12:52:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:25,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:28,587 INFO 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 12:52:28,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:28,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784965754] [2024-06-14 12:52:28,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784965754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:28,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:28,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:52:28,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138741219] [2024-06-14 12:52:28,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:28,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:52:28,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:28,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:52:28,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:52:28,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:52:28,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 253 transitions, 3931 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:28,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:28,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:52:28,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:31,383 INFO L124 PetriNetUnfolderBase]: 6376/10140 cut-off events. [2024-06-14 12:52:31,383 INFO L125 PetriNetUnfolderBase]: For 260476/260492 co-relation queries the response was YES. [2024-06-14 12:52:31,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60114 conditions, 10140 events. 6376/10140 cut-off events. For 260476/260492 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 66725 event pairs, 2659 based on Foata normal form. 29/10163 useless extension candidates. Maximal degree in co-relation 60033. Up to 9260 conditions per place. [2024-06-14 12:52:31,450 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 234 selfloop transitions, 54 changer transitions 0/292 dead transitions. [2024-06-14 12:52:31,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 292 transitions, 4653 flow [2024-06-14 12:52:31,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:52:31,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:52:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:52:31,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:52:31,451 INFO L175 Difference]: Start difference. First operand has 162 places, 253 transitions, 3931 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:52:31,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 292 transitions, 4653 flow [2024-06-14 12:52:31,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 292 transitions, 4279 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-14 12:52:31,856 INFO L231 Difference]: Finished difference. Result has 162 places, 254 transitions, 3694 flow [2024-06-14 12:52:31,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3557, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3694, PETRI_PLACES=162, PETRI_TRANSITIONS=254} [2024-06-14 12:52:31,857 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2024-06-14 12:52:31,857 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 254 transitions, 3694 flow [2024-06-14 12:52:31,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:31,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:31,857 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 12:52:31,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:52:31,857 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 12:52:31,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:31,858 INFO L85 PathProgramCache]: Analyzing trace with hash 248936913, now seen corresponding path program 2 times [2024-06-14 12:52:31,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:31,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510589870] [2024-06-14 12:52:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:31,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:35,329 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 12:52:35,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:35,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510589870] [2024-06-14 12:52:35,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510589870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:35,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:35,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:35,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130879604] [2024-06-14 12:52:35,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:35,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:35,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:35,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:35,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:35,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:52:35,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 254 transitions, 3694 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 12:52:35,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:35,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:52:35,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:37,858 INFO L124 PetriNetUnfolderBase]: 6424/10236 cut-off events. [2024-06-14 12:52:37,859 INFO L125 PetriNetUnfolderBase]: For 265453/265469 co-relation queries the response was YES. [2024-06-14 12:52:37,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59318 conditions, 10236 events. 6424/10236 cut-off events. For 265453/265469 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67697 event pairs, 2655 based on Foata normal form. 21/10251 useless extension candidates. Maximal degree in co-relation 59237. Up to 9238 conditions per place. [2024-06-14 12:52:37,954 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 235 selfloop transitions, 56 changer transitions 0/295 dead transitions. [2024-06-14 12:52:37,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 295 transitions, 4434 flow [2024-06-14 12:52:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:52:37,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:52:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:52:37,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:52:37,956 INFO L175 Difference]: Start difference. First operand has 162 places, 254 transitions, 3694 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:52:37,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 295 transitions, 4434 flow [2024-06-14 12:52:38,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 295 transitions, 4315 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 12:52:38,479 INFO L231 Difference]: Finished difference. Result has 164 places, 255 transitions, 3717 flow [2024-06-14 12:52:38,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3717, PETRI_PLACES=164, PETRI_TRANSITIONS=255} [2024-06-14 12:52:38,480 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-14 12:52:38,480 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 255 transitions, 3717 flow [2024-06-14 12:52:38,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 12:52:38,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:38,480 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 12:52:38,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:52:38,480 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 12:52:38,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:38,481 INFO L85 PathProgramCache]: Analyzing trace with hash 258133683, now seen corresponding path program 3 times [2024-06-14 12:52:38,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:38,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567459922] [2024-06-14 12:52:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:38,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:41,810 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 12:52:41,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:41,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567459922] [2024-06-14 12:52:41,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567459922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:41,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:41,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:52:41,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505037677] [2024-06-14 12:52:41,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:41,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:52:41,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:41,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:52:41,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:52:41,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:52:41,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 255 transitions, 3717 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 12:52:41,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:41,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:52:41,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:44,307 INFO L124 PetriNetUnfolderBase]: 6404/10204 cut-off events. [2024-06-14 12:52:44,307 INFO L125 PetriNetUnfolderBase]: For 272969/272985 co-relation queries the response was YES. [2024-06-14 12:52:44,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59193 conditions, 10204 events. 6404/10204 cut-off events. For 272969/272985 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67045 event pairs, 2596 based on Foata normal form. 21/10219 useless extension candidates. Maximal degree in co-relation 59111. Up to 8414 conditions per place. [2024-06-14 12:52:44,387 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 226 selfloop transitions, 64 changer transitions 0/294 dead transitions. [2024-06-14 12:52:44,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 294 transitions, 4371 flow [2024-06-14 12:52:44,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:52:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:52:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:52:44,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:52:44,389 INFO L175 Difference]: Start difference. First operand has 164 places, 255 transitions, 3717 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:52:44,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 294 transitions, 4371 flow [2024-06-14 12:52:44,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 294 transitions, 4243 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:52:44,769 INFO L231 Difference]: Finished difference. Result has 165 places, 254 transitions, 3659 flow [2024-06-14 12:52:44,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3527, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3659, PETRI_PLACES=165, PETRI_TRANSITIONS=254} [2024-06-14 12:52:44,769 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-14 12:52:44,769 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 254 transitions, 3659 flow [2024-06-14 12:52:44,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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 12:52:44,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:44,770 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 12:52:44,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:52:44,770 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:44,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:44,770 INFO L85 PathProgramCache]: Analyzing trace with hash -475892331, now seen corresponding path program 1 times [2024-06-14 12:52:44,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:44,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918947080] [2024-06-14 12:52:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:44,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:47,772 INFO 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 12:52:47,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:47,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918947080] [2024-06-14 12:52:47,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918947080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:47,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:47,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:52:47,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062822853] [2024-06-14 12:52:47,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:47,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:52:47,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:47,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:52:47,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:52:47,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:52:47,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 254 transitions, 3659 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:47,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:47,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:52:47,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:50,157 INFO L124 PetriNetUnfolderBase]: 6413/10220 cut-off events. [2024-06-14 12:52:50,157 INFO L125 PetriNetUnfolderBase]: For 281618/281622 co-relation queries the response was YES. [2024-06-14 12:52:50,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59687 conditions, 10220 events. 6413/10220 cut-off events. For 281618/281622 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 67668 event pairs, 2799 based on Foata normal form. 8/10227 useless extension candidates. Maximal degree in co-relation 59604. Up to 9950 conditions per place. [2024-06-14 12:52:50,238 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 256 selfloop transitions, 23 changer transitions 0/283 dead transitions. [2024-06-14 12:52:50,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 283 transitions, 4384 flow [2024-06-14 12:52:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:52:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:52:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:52:50,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-14 12:52:50,239 INFO L175 Difference]: Start difference. First operand has 165 places, 254 transitions, 3659 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:52:50,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 283 transitions, 4384 flow [2024-06-14 12:52:50,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 283 transitions, 4241 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 12:52:50,663 INFO L231 Difference]: Finished difference. Result has 167 places, 261 transitions, 3684 flow [2024-06-14 12:52:50,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3518, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3684, PETRI_PLACES=167, PETRI_TRANSITIONS=261} [2024-06-14 12:52:50,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-14 12:52:50,663 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 261 transitions, 3684 flow [2024-06-14 12:52:50,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:50,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:50,664 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 12:52:50,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:52:50,664 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:50,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:50,664 INFO L85 PathProgramCache]: Analyzing trace with hash -515084867, now seen corresponding path program 2 times [2024-06-14 12:52:50,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:50,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991073377] [2024-06-14 12:52:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:50,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:53,851 INFO 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 12:52:53,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:53,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991073377] [2024-06-14 12:52:53,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991073377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:53,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:53,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:52:53,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024052397] [2024-06-14 12:52:53,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:53,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:52:53,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:53,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:52:53,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:52:53,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:52:53,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 261 transitions, 3684 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:53,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:53,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:52:53,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:56,282 INFO L124 PetriNetUnfolderBase]: 6407/10212 cut-off events. [2024-06-14 12:52:56,282 INFO L125 PetriNetUnfolderBase]: For 291000/291006 co-relation queries the response was YES. [2024-06-14 12:52:56,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59514 conditions, 10212 events. 6407/10212 cut-off events. For 291000/291006 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 67606 event pairs, 2799 based on Foata normal form. 8/10219 useless extension candidates. Maximal degree in co-relation 59430. Up to 9936 conditions per place. [2024-06-14 12:52:56,363 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 253 selfloop transitions, 25 changer transitions 0/282 dead transitions. [2024-06-14 12:52:56,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 282 transitions, 4308 flow [2024-06-14 12:52:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:52:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:52:56,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 12:52:56,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:52:56,364 INFO L175 Difference]: Start difference. First operand has 167 places, 261 transitions, 3684 flow. Second operand 6 states and 102 transitions. [2024-06-14 12:52:56,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 282 transitions, 4308 flow [2024-06-14 12:52:56,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 282 transitions, 4229 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:52:56,781 INFO L231 Difference]: Finished difference. Result has 169 places, 261 transitions, 3668 flow [2024-06-14 12:52:56,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3605, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3668, PETRI_PLACES=169, PETRI_TRANSITIONS=261} [2024-06-14 12:52:56,782 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 125 predicate places. [2024-06-14 12:52:56,782 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 261 transitions, 3668 flow [2024-06-14 12:52:56,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:56,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:56,782 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 12:52:56,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:52:56,782 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:56,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:56,783 INFO L85 PathProgramCache]: Analyzing trace with hash -524500187, now seen corresponding path program 3 times [2024-06-14 12:52:56,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:56,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218224396] [2024-06-14 12:52:56,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:56,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:59,768 INFO 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 12:52:59,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:59,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218224396] [2024-06-14 12:52:59,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218224396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:59,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:59,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:52:59,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043862672] [2024-06-14 12:52:59,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:59,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:52:59,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:59,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:52:59,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:52:59,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:52:59,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 261 transitions, 3668 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:59,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:59,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:52:59,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:02,264 INFO L124 PetriNetUnfolderBase]: 6401/10220 cut-off events. [2024-06-14 12:53:02,265 INFO L125 PetriNetUnfolderBase]: For 303112/303128 co-relation queries the response was YES. [2024-06-14 12:53:02,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59791 conditions, 10220 events. 6401/10220 cut-off events. For 303112/303128 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67893 event pairs, 2758 based on Foata normal form. 14/10231 useless extension candidates. Maximal degree in co-relation 59706. Up to 9914 conditions per place. [2024-06-14 12:53:02,344 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 246 selfloop transitions, 29 changer transitions 0/279 dead transitions. [2024-06-14 12:53:02,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 279 transitions, 4316 flow [2024-06-14 12:53:02,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:53:02,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:53:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-14 12:53:02,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:53:02,345 INFO L175 Difference]: Start difference. First operand has 169 places, 261 transitions, 3668 flow. Second operand 6 states and 96 transitions. [2024-06-14 12:53:02,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 279 transitions, 4316 flow [2024-06-14 12:53:02,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 279 transitions, 4024 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 12:53:02,779 INFO L231 Difference]: Finished difference. Result has 167 places, 264 transitions, 3496 flow [2024-06-14 12:53:02,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3496, PETRI_PLACES=167, PETRI_TRANSITIONS=264} [2024-06-14 12:53:02,780 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-14 12:53:02,780 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 264 transitions, 3496 flow [2024-06-14 12:53:02,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:02,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:02,780 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 12:53:02,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:53:02,780 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:02,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:02,780 INFO L85 PathProgramCache]: Analyzing trace with hash 353804109, now seen corresponding path program 1 times [2024-06-14 12:53:02,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:02,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682440780] [2024-06-14 12:53:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:02,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:05,069 INFO 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 12:53:05,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:05,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682440780] [2024-06-14 12:53:05,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682440780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:05,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:05,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:53:05,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742568924] [2024-06-14 12:53:05,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:05,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:53:05,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:53:05,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:53:05,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:53:05,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 264 transitions, 3496 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:05,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:05,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:53:05,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:07,823 INFO L124 PetriNetUnfolderBase]: 6443/10280 cut-off events. [2024-06-14 12:53:07,823 INFO L125 PetriNetUnfolderBase]: For 299884/299886 co-relation queries the response was YES. [2024-06-14 12:53:07,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59992 conditions, 10280 events. 6443/10280 cut-off events. For 299884/299886 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68235 event pairs, 2797 based on Foata normal form. 2/10281 useless extension candidates. Maximal degree in co-relation 59908. Up to 9909 conditions per place. [2024-06-14 12:53:07,917 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 272 selfloop transitions, 27 changer transitions 0/303 dead transitions. [2024-06-14 12:53:07,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 303 transitions, 4474 flow [2024-06-14 12:53:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:53:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:53:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:53:07,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 12:53:07,918 INFO L175 Difference]: Start difference. First operand has 167 places, 264 transitions, 3496 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:53:07,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 303 transitions, 4474 flow [2024-06-14 12:53:08,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 303 transitions, 4376 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:53:08,433 INFO L231 Difference]: Finished difference. Result has 171 places, 275 transitions, 3647 flow [2024-06-14 12:53:08,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3647, PETRI_PLACES=171, PETRI_TRANSITIONS=275} [2024-06-14 12:53:08,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-14 12:53:08,434 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 275 transitions, 3647 flow [2024-06-14 12:53:08,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:08,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:08,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:08,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:53:08,434 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:08,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:08,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1190843409, now seen corresponding path program 1 times [2024-06-14 12:53:08,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:08,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959002626] [2024-06-14 12:53:08,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:08,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:10,828 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 12:53:10,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:10,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959002626] [2024-06-14 12:53:10,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959002626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:10,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:10,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:53:10,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107610015] [2024-06-14 12:53:10,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:10,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:53:10,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:10,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:53:10,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:53:10,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:53:10,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 275 transitions, 3647 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:10,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:10,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:53:10,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:13,512 INFO L124 PetriNetUnfolderBase]: 6534/10418 cut-off events. [2024-06-14 12:53:13,512 INFO L125 PetriNetUnfolderBase]: For 326044/326046 co-relation queries the response was YES. [2024-06-14 12:53:13,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62593 conditions, 10418 events. 6534/10418 cut-off events. For 326044/326046 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 69210 event pairs, 2863 based on Foata normal form. 6/10423 useless extension candidates. Maximal degree in co-relation 62507. Up to 10088 conditions per place. [2024-06-14 12:53:13,600 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 280 selfloop transitions, 24 changer transitions 0/308 dead transitions. [2024-06-14 12:53:13,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 308 transitions, 4555 flow [2024-06-14 12:53:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:13,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:13,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:53:13,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 12:53:13,601 INFO L175 Difference]: Start difference. First operand has 171 places, 275 transitions, 3647 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:53:13,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 308 transitions, 4555 flow [2024-06-14 12:53:14,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 308 transitions, 4449 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-14 12:53:14,070 INFO L231 Difference]: Finished difference. Result has 178 places, 286 transitions, 3789 flow [2024-06-14 12:53:14,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3563, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3789, PETRI_PLACES=178, PETRI_TRANSITIONS=286} [2024-06-14 12:53:14,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-14 12:53:14,071 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 286 transitions, 3789 flow [2024-06-14 12:53:14,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:14,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:14,071 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 12:53:14,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:53:14,071 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:14,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:14,071 INFO L85 PathProgramCache]: Analyzing trace with hash 353924079, now seen corresponding path program 2 times [2024-06-14 12:53:14,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:14,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602919824] [2024-06-14 12:53:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:14,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:16,543 INFO 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 12:53:16,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:16,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602919824] [2024-06-14 12:53:16,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602919824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:16,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:16,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:53:16,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076544915] [2024-06-14 12:53:16,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:16,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:53:16,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:16,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:53:16,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:53:16,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:53:16,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 286 transitions, 3789 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:16,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:16,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:53:16,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:19,065 INFO L124 PetriNetUnfolderBase]: 6508/10382 cut-off events. [2024-06-14 12:53:19,065 INFO L125 PetriNetUnfolderBase]: For 337921/337923 co-relation queries the response was YES. [2024-06-14 12:53:19,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62565 conditions, 10382 events. 6508/10382 cut-off events. For 337921/337923 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68991 event pairs, 2862 based on Foata normal form. 6/10387 useless extension candidates. Maximal degree in co-relation 62476. Up to 10069 conditions per place. [2024-06-14 12:53:19,164 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 279 selfloop transitions, 24 changer transitions 0/307 dead transitions. [2024-06-14 12:53:19,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 307 transitions, 4453 flow [2024-06-14 12:53:19,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:19,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:53:19,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-14 12:53:19,165 INFO L175 Difference]: Start difference. First operand has 178 places, 286 transitions, 3789 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:53:19,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 307 transitions, 4453 flow [2024-06-14 12:53:19,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 307 transitions, 4343 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 12:53:19,778 INFO L231 Difference]: Finished difference. Result has 182 places, 286 transitions, 3735 flow [2024-06-14 12:53:19,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3735, PETRI_PLACES=182, PETRI_TRANSITIONS=286} [2024-06-14 12:53:19,779 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-14 12:53:19,779 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 286 transitions, 3735 flow [2024-06-14 12:53:19,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:19,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:19,779 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 12:53:19,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:53:19,779 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:19,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:19,779 INFO L85 PathProgramCache]: Analyzing trace with hash -527516259, now seen corresponding path program 2 times [2024-06-14 12:53:19,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:19,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638161947] [2024-06-14 12:53:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:19,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:22,271 INFO 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 12:53:22,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:22,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638161947] [2024-06-14 12:53:22,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638161947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:22,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:22,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:53:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220323987] [2024-06-14 12:53:22,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:22,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:53:22,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:22,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:53:22,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:53:22,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:53:22,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 286 transitions, 3735 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:22,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:22,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:53:22,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:24,778 INFO L124 PetriNetUnfolderBase]: 6550/10430 cut-off events. [2024-06-14 12:53:24,778 INFO L125 PetriNetUnfolderBase]: For 353117/353121 co-relation queries the response was YES. [2024-06-14 12:53:24,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63310 conditions, 10430 events. 6550/10430 cut-off events. For 353117/353121 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 69025 event pairs, 2814 based on Foata normal form. 4/10433 useless extension candidates. Maximal degree in co-relation 63220. Up to 10017 conditions per place. [2024-06-14 12:53:24,851 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 273 selfloop transitions, 38 changer transitions 0/315 dead transitions. [2024-06-14 12:53:24,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 315 transitions, 4653 flow [2024-06-14 12:53:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:53:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:53:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 12:53:24,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:53:24,853 INFO L175 Difference]: Start difference. First operand has 182 places, 286 transitions, 3735 flow. Second operand 7 states and 119 transitions. [2024-06-14 12:53:24,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 315 transitions, 4653 flow [2024-06-14 12:53:25,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 315 transitions, 4605 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 12:53:25,348 INFO L231 Difference]: Finished difference. Result has 183 places, 292 transitions, 3877 flow [2024-06-14 12:53:25,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3877, PETRI_PLACES=183, PETRI_TRANSITIONS=292} [2024-06-14 12:53:25,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 139 predicate places. [2024-06-14 12:53:25,349 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 292 transitions, 3877 flow [2024-06-14 12:53:25,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:25,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:25,349 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 12:53:25,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:53:25,349 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:25,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:25,350 INFO L85 PathProgramCache]: Analyzing trace with hash -527522769, now seen corresponding path program 3 times [2024-06-14 12:53:25,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:25,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932096826] [2024-06-14 12:53:25,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:25,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:27,829 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 12:53:27,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:27,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932096826] [2024-06-14 12:53:27,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932096826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:27,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:27,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:53:27,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032497317] [2024-06-14 12:53:27,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:27,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:53:27,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:27,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:53:27,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:53:27,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:53:27,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 292 transitions, 3877 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:27,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:27,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:53:27,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:30,413 INFO L124 PetriNetUnfolderBase]: 6540/10417 cut-off events. [2024-06-14 12:53:30,413 INFO L125 PetriNetUnfolderBase]: For 368547/368549 co-relation queries the response was YES. [2024-06-14 12:53:30,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63682 conditions, 10417 events. 6540/10417 cut-off events. For 368547/368549 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68929 event pairs, 2808 based on Foata normal form. 6/10422 useless extension candidates. Maximal degree in co-relation 63590. Up to 10014 conditions per place. [2024-06-14 12:53:30,515 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 276 selfloop transitions, 39 changer transitions 0/319 dead transitions. [2024-06-14 12:53:30,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 319 transitions, 4659 flow [2024-06-14 12:53:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:53:30,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 12:53:30,517 INFO L175 Difference]: Start difference. First operand has 183 places, 292 transitions, 3877 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:53:30,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 319 transitions, 4659 flow [2024-06-14 12:53:31,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 319 transitions, 4562 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:53:31,103 INFO L231 Difference]: Finished difference. Result has 187 places, 292 transitions, 3872 flow [2024-06-14 12:53:31,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3780, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3872, PETRI_PLACES=187, PETRI_TRANSITIONS=292} [2024-06-14 12:53:31,103 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-14 12:53:31,103 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 292 transitions, 3872 flow [2024-06-14 12:53:31,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:31,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:31,104 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 12:53:31,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:53:31,104 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:31,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:31,104 INFO L85 PathProgramCache]: Analyzing trace with hash -524731571, now seen corresponding path program 3 times [2024-06-14 12:53:31,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:31,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727910339] [2024-06-14 12:53:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:31,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:33,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:33,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727910339] [2024-06-14 12:53:33,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727910339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:33,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:33,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:53:33,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214629466] [2024-06-14 12:53:33,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:33,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:53:33,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:33,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:53:33,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:53:33,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:53:33,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 292 transitions, 3872 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:33,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:33,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:53:33,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:36,304 INFO L124 PetriNetUnfolderBase]: 6514/10381 cut-off events. [2024-06-14 12:53:36,304 INFO L125 PetriNetUnfolderBase]: For 381160/381162 co-relation queries the response was YES. [2024-06-14 12:53:36,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63682 conditions, 10381 events. 6514/10381 cut-off events. For 381160/381162 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 68680 event pairs, 2805 based on Foata normal form. 6/10386 useless extension candidates. Maximal degree in co-relation 63589. Up to 9995 conditions per place. [2024-06-14 12:53:36,384 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 274 selfloop transitions, 40 changer transitions 0/318 dead transitions. [2024-06-14 12:53:36,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 318 transitions, 4574 flow [2024-06-14 12:53:36,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:53:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:53:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:53:36,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:53:36,385 INFO L175 Difference]: Start difference. First operand has 187 places, 292 transitions, 3872 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:53:36,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 318 transitions, 4574 flow [2024-06-14 12:53:36,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 318 transitions, 4450 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 12:53:36,996 INFO L231 Difference]: Finished difference. Result has 188 places, 292 transitions, 3847 flow [2024-06-14 12:53:36,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3748, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3847, PETRI_PLACES=188, PETRI_TRANSITIONS=292} [2024-06-14 12:53:36,996 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-14 12:53:36,996 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 292 transitions, 3847 flow [2024-06-14 12:53:36,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:36,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:36,997 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 12:53:36,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:53:36,997 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:36,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash -524485307, now seen corresponding path program 1 times [2024-06-14 12:53:36,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:36,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296793935] [2024-06-14 12:53:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:36,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:40,159 INFO 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 12:53:40,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:40,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296793935] [2024-06-14 12:53:40,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296793935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:40,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:40,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:53:40,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68469278] [2024-06-14 12:53:40,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:40,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:53:40,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:40,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:53:40,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:53:40,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:53:40,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 292 transitions, 3847 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:53:40,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:40,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:53:40,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:42,644 INFO L124 PetriNetUnfolderBase]: 6509/10382 cut-off events. [2024-06-14 12:53:42,644 INFO L125 PetriNetUnfolderBase]: For 393058/393060 co-relation queries the response was YES. [2024-06-14 12:53:42,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63963 conditions, 10382 events. 6509/10382 cut-off events. For 393058/393060 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 68704 event pairs, 2860 based on Foata normal form. 2/10383 useless extension candidates. Maximal degree in co-relation 63869. Up to 10121 conditions per place. [2024-06-14 12:53:42,756 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 291 selfloop transitions, 12 changer transitions 0/307 dead transitions. [2024-06-14 12:53:42,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 307 transitions, 4521 flow [2024-06-14 12:53:42,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:53:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:53:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-14 12:53:42,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-14 12:53:42,757 INFO L175 Difference]: Start difference. First operand has 188 places, 292 transitions, 3847 flow. Second operand 6 states and 93 transitions. [2024-06-14 12:53:42,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 307 transitions, 4521 flow [2024-06-14 12:53:43,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 307 transitions, 4433 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 12:53:43,461 INFO L231 Difference]: Finished difference. Result has 186 places, 294 transitions, 3824 flow [2024-06-14 12:53:43,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3759, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3824, PETRI_PLACES=186, PETRI_TRANSITIONS=294} [2024-06-14 12:53:43,461 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-14 12:53:43,461 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 294 transitions, 3824 flow [2024-06-14 12:53:43,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:53:43,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:43,462 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 12:53:43,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:53:43,462 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 12:53:43,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:43,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1170623546, now seen corresponding path program 1 times [2024-06-14 12:53:43,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:43,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107385340] [2024-06-14 12:53:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:43,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:46,743 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 12:53:46,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:46,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107385340] [2024-06-14 12:53:46,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107385340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:46,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:46,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:53:46,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184109516] [2024-06-14 12:53:46,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:46,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:53:46,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:53:46,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:53:46,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:53:46,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 294 transitions, 3824 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:53:46,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:46,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:53:46,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:49,563 INFO L124 PetriNetUnfolderBase]: 6669/10623 cut-off events. [2024-06-14 12:53:49,563 INFO L125 PetriNetUnfolderBase]: For 404318/404332 co-relation queries the response was YES. [2024-06-14 12:53:49,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65526 conditions, 10623 events. 6669/10623 cut-off events. For 404318/404332 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 70528 event pairs, 2707 based on Foata normal form. 30/10652 useless extension candidates. Maximal degree in co-relation 65432. Up to 9997 conditions per place. [2024-06-14 12:53:49,660 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 263 selfloop transitions, 81 changer transitions 4/352 dead transitions. [2024-06-14 12:53:49,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 352 transitions, 4986 flow [2024-06-14 12:53:49,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:53:49,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:53:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 12:53:49,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 12:53:49,661 INFO L175 Difference]: Start difference. First operand has 186 places, 294 transitions, 3824 flow. Second operand 9 states and 155 transitions. [2024-06-14 12:53:49,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 352 transitions, 4986 flow [2024-06-14 12:53:50,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 352 transitions, 4937 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 12:53:50,347 INFO L231 Difference]: Finished difference. Result has 192 places, 315 transitions, 4312 flow [2024-06-14 12:53:50,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3775, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4312, PETRI_PLACES=192, PETRI_TRANSITIONS=315} [2024-06-14 12:53:50,348 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-14 12:53:50,348 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 315 transitions, 4312 flow [2024-06-14 12:53:50,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:53:50,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:50,348 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 12:53:50,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:53:50,349 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 12:53:50,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:50,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1179889136, now seen corresponding path program 2 times [2024-06-14 12:53:50,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:50,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359055660] [2024-06-14 12:53:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:50,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:53,551 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 12:53:53,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:53,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359055660] [2024-06-14 12:53:53,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359055660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:53,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:53,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:53:53,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068426261] [2024-06-14 12:53:53,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:53,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:53:53,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:53,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:53:53,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:53:53,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:53:53,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 315 transitions, 4312 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:53:53,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:53,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:53:53,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:56,329 INFO L124 PetriNetUnfolderBase]: 7148/11351 cut-off events. [2024-06-14 12:53:56,329 INFO L125 PetriNetUnfolderBase]: For 450608/450616 co-relation queries the response was YES. [2024-06-14 12:53:56,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72166 conditions, 11351 events. 7148/11351 cut-off events. For 450608/450616 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 75502 event pairs, 2489 based on Foata normal form. 22/11372 useless extension candidates. Maximal degree in co-relation 72070. Up to 9729 conditions per place. [2024-06-14 12:53:56,439 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 247 selfloop transitions, 143 changer transitions 0/394 dead transitions. [2024-06-14 12:53:56,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 394 transitions, 6013 flow [2024-06-14 12:53:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:53:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:53:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:53:56,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:53:56,440 INFO L175 Difference]: Start difference. First operand has 192 places, 315 transitions, 4312 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:53:56,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 394 transitions, 6013 flow [2024-06-14 12:53:57,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 394 transitions, 5797 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:53:57,215 INFO L231 Difference]: Finished difference. Result has 197 places, 360 transitions, 5258 flow [2024-06-14 12:53:57,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4118, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5258, PETRI_PLACES=197, PETRI_TRANSITIONS=360} [2024-06-14 12:53:57,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-14 12:53:57,216 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 360 transitions, 5258 flow [2024-06-14 12:53:57,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:53:57,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:57,216 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 12:53:57,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:53:57,216 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 12:53:57,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:57,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1179877976, now seen corresponding path program 3 times [2024-06-14 12:53:57,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:57,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158540654] [2024-06-14 12:53:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:57,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:00,457 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 12:54:00,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:00,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158540654] [2024-06-14 12:54:00,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158540654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:00,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:00,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:54:00,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585236647] [2024-06-14 12:54:00,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:00,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:54:00,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:00,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:54:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:54:00,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:54:00,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 360 transitions, 5258 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:00,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:00,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:54:00,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:03,560 INFO L124 PetriNetUnfolderBase]: 7100/11263 cut-off events. [2024-06-14 12:54:03,560 INFO L125 PetriNetUnfolderBase]: For 462867/462875 co-relation queries the response was YES. [2024-06-14 12:54:03,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73349 conditions, 11263 events. 7100/11263 cut-off events. For 462867/462875 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74770 event pairs, 2647 based on Foata normal form. 22/11284 useless extension candidates. Maximal degree in co-relation 73251. Up to 9701 conditions per place. [2024-06-14 12:54:03,653 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 245 selfloop transitions, 145 changer transitions 1/395 dead transitions. [2024-06-14 12:54:03,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 395 transitions, 6269 flow [2024-06-14 12:54:03,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:54:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:54:03,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 12:54:03,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-14 12:54:03,655 INFO L175 Difference]: Start difference. First operand has 197 places, 360 transitions, 5258 flow. Second operand 10 states and 167 transitions. [2024-06-14 12:54:03,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 395 transitions, 6269 flow [2024-06-14 12:54:04,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 395 transitions, 6173 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-14 12:54:04,562 INFO L231 Difference]: Finished difference. Result has 207 places, 365 transitions, 5639 flow [2024-06-14 12:54:04,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5162, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5639, PETRI_PLACES=207, PETRI_TRANSITIONS=365} [2024-06-14 12:54:04,562 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-14 12:54:04,562 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 365 transitions, 5639 flow [2024-06-14 12:54:04,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:04,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:04,563 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 12:54:04,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:54:04,563 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 12:54:04,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:04,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1844998564, now seen corresponding path program 4 times [2024-06-14 12:54:04,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:04,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771245204] [2024-06-14 12:54:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:04,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:08,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:08,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771245204] [2024-06-14 12:54:08,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771245204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:08,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:08,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:54:08,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191331893] [2024-06-14 12:54:08,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:08,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:54:08,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:08,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:54:08,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:54:08,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:54:08,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 365 transitions, 5639 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:08,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:08,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:54:08,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:11,284 INFO L124 PetriNetUnfolderBase]: 7132/11334 cut-off events. [2024-06-14 12:54:11,284 INFO L125 PetriNetUnfolderBase]: For 480543/480557 co-relation queries the response was YES. [2024-06-14 12:54:11,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75790 conditions, 11334 events. 7132/11334 cut-off events. For 480543/480557 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 75516 event pairs, 2580 based on Foata normal form. 22/11355 useless extension candidates. Maximal degree in co-relation 75688. Up to 9084 conditions per place. [2024-06-14 12:54:11,381 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 196 selfloop transitions, 216 changer transitions 1/417 dead transitions. [2024-06-14 12:54:11,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 417 transitions, 6875 flow [2024-06-14 12:54:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:54:11,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:54:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:54:11,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-14 12:54:11,383 INFO L175 Difference]: Start difference. First operand has 207 places, 365 transitions, 5639 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:54:11,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 417 transitions, 6875 flow [2024-06-14 12:54:12,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 417 transitions, 6592 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 12:54:12,391 INFO L231 Difference]: Finished difference. Result has 210 places, 369 transitions, 5903 flow [2024-06-14 12:54:12,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5356, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5903, PETRI_PLACES=210, PETRI_TRANSITIONS=369} [2024-06-14 12:54:12,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-14 12:54:12,391 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 369 transitions, 5903 flow [2024-06-14 12:54:12,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:12,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:12,392 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 12:54:12,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:54:12,392 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 12:54:12,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:12,392 INFO L85 PathProgramCache]: Analyzing trace with hash 920364596, now seen corresponding path program 5 times [2024-06-14 12:54:12,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:12,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146462540] [2024-06-14 12:54:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:12,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:15,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:15,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146462540] [2024-06-14 12:54:15,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146462540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:15,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:15,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:54:15,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328471420] [2024-06-14 12:54:15,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:15,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:54:15,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:54:15,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:54:15,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:54:15,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 369 transitions, 5903 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:15,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:15,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:54:15,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:18,959 INFO L124 PetriNetUnfolderBase]: 7356/11685 cut-off events. [2024-06-14 12:54:18,959 INFO L125 PetriNetUnfolderBase]: For 523654/523670 co-relation queries the response was YES. [2024-06-14 12:54:19,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79762 conditions, 11685 events. 7356/11685 cut-off events. For 523654/523670 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 78055 event pairs, 2004 based on Foata normal form. 17/11696 useless extension candidates. Maximal degree in co-relation 79660. Up to 8913 conditions per place. [2024-06-14 12:54:19,057 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 184 selfloop transitions, 228 changer transitions 0/416 dead transitions. [2024-06-14 12:54:19,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 416 transitions, 7359 flow [2024-06-14 12:54:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:54:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:54:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:54:19,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:54:19,058 INFO L175 Difference]: Start difference. First operand has 210 places, 369 transitions, 5903 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:54:19,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 416 transitions, 7359 flow [2024-06-14 12:54:20,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 416 transitions, 7018 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:54:20,085 INFO L231 Difference]: Finished difference. Result has 214 places, 386 transitions, 6419 flow [2024-06-14 12:54:20,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5562, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6419, PETRI_PLACES=214, PETRI_TRANSITIONS=386} [2024-06-14 12:54:20,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-14 12:54:20,085 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 386 transitions, 6419 flow [2024-06-14 12:54:20,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:20,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:20,085 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 12:54:20,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:54:20,086 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 12:54:20,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:20,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1212239516, now seen corresponding path program 6 times [2024-06-14 12:54:20,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:20,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688270818] [2024-06-14 12:54:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:20,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:23,718 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 12:54:23,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:23,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688270818] [2024-06-14 12:54:23,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688270818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:23,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:23,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:54:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047962088] [2024-06-14 12:54:23,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:23,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:54:23,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:54:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:54:23,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:54:23,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 386 transitions, 6419 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:23,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:23,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:54:23,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:26,797 INFO L124 PetriNetUnfolderBase]: 7344/11653 cut-off events. [2024-06-14 12:54:26,797 INFO L125 PetriNetUnfolderBase]: For 551580/551588 co-relation queries the response was YES. [2024-06-14 12:54:26,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82814 conditions, 11653 events. 7344/11653 cut-off events. For 551580/551588 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 77801 event pairs, 2595 based on Foata normal form. 14/11666 useless extension candidates. Maximal degree in co-relation 82709. Up to 9397 conditions per place. [2024-06-14 12:54:26,908 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 215 selfloop transitions, 198 changer transitions 0/417 dead transitions. [2024-06-14 12:54:26,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 417 transitions, 7421 flow [2024-06-14 12:54:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:54:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:54:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 12:54:26,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 12:54:26,910 INFO L175 Difference]: Start difference. First operand has 214 places, 386 transitions, 6419 flow. Second operand 8 states and 145 transitions. [2024-06-14 12:54:26,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 417 transitions, 7421 flow [2024-06-14 12:54:28,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 417 transitions, 7157 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-14 12:54:28,099 INFO L231 Difference]: Finished difference. Result has 219 places, 386 transitions, 6574 flow [2024-06-14 12:54:28,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6155, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6574, PETRI_PLACES=219, PETRI_TRANSITIONS=386} [2024-06-14 12:54:28,100 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-14 12:54:28,100 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 386 transitions, 6574 flow [2024-06-14 12:54:28,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:28,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:28,100 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 12:54:28,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:54:28,100 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 12:54:28,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:28,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1635511454, now seen corresponding path program 1 times [2024-06-14 12:54:28,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:28,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819183660] [2024-06-14 12:54:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:28,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:30,661 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 12:54:30,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:30,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819183660] [2024-06-14 12:54:30,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819183660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:30,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:30,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:54:30,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422771348] [2024-06-14 12:54:30,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:30,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:54:30,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:30,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:54:30,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:54:30,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:54:30,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 386 transitions, 6574 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:30,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:30,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:54:30,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:33,896 INFO L124 PetriNetUnfolderBase]: 7332/11657 cut-off events. [2024-06-14 12:54:33,896 INFO L125 PetriNetUnfolderBase]: For 567311/567313 co-relation queries the response was YES. [2024-06-14 12:54:33,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83076 conditions, 11657 events. 7332/11657 cut-off events. For 567311/567313 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 77903 event pairs, 2968 based on Foata normal form. 4/11660 useless extension candidates. Maximal degree in co-relation 82970. Up to 11129 conditions per place. [2024-06-14 12:54:34,042 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 368 selfloop transitions, 43 changer transitions 0/415 dead transitions. [2024-06-14 12:54:34,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 415 transitions, 7476 flow [2024-06-14 12:54:34,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:54:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:54:34,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:54:34,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:54:34,043 INFO L175 Difference]: Start difference. First operand has 219 places, 386 transitions, 6574 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:54:34,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 415 transitions, 7476 flow [2024-06-14 12:54:35,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 415 transitions, 6849 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-14 12:54:35,371 INFO L231 Difference]: Finished difference. Result has 218 places, 386 transitions, 6039 flow [2024-06-14 12:54:35,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5947, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6039, PETRI_PLACES=218, PETRI_TRANSITIONS=386} [2024-06-14 12:54:35,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-14 12:54:35,372 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 386 transitions, 6039 flow [2024-06-14 12:54:35,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:35,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:35,372 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 12:54:35,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:54:35,372 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 12:54:35,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:35,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2039341230, now seen corresponding path program 1 times [2024-06-14 12:54:35,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:35,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983909413] [2024-06-14 12:54:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:35,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:38,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:38,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983909413] [2024-06-14 12:54:38,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983909413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:38,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:38,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:54:38,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176554164] [2024-06-14 12:54:38,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:38,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:54:38,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:38,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:54:38,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:54:38,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:54:38,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 386 transitions, 6039 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:38,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:38,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:54:38,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:41,973 INFO L124 PetriNetUnfolderBase]: 7512/11863 cut-off events. [2024-06-14 12:54:41,973 INFO L125 PetriNetUnfolderBase]: For 552010/552014 co-relation queries the response was YES. [2024-06-14 12:54:42,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83042 conditions, 11863 events. 7512/11863 cut-off events. For 552010/552014 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 78838 event pairs, 2552 based on Foata normal form. 6/11868 useless extension candidates. Maximal degree in co-relation 82935. Up to 9425 conditions per place. [2024-06-14 12:54:42,129 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 223 selfloop transitions, 218 changer transitions 0/445 dead transitions. [2024-06-14 12:54:42,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 445 transitions, 7502 flow [2024-06-14 12:54:42,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:54:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:54:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 12:54:42,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 12:54:42,131 INFO L175 Difference]: Start difference. First operand has 218 places, 386 transitions, 6039 flow. Second operand 10 states and 182 transitions. [2024-06-14 12:54:42,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 445 transitions, 7502 flow [2024-06-14 12:54:43,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 445 transitions, 7329 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 12:54:43,160 INFO L231 Difference]: Finished difference. Result has 220 places, 397 transitions, 6552 flow [2024-06-14 12:54:43,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5870, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6552, PETRI_PLACES=220, PETRI_TRANSITIONS=397} [2024-06-14 12:54:43,161 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-14 12:54:43,161 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 397 transitions, 6552 flow [2024-06-14 12:54:43,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:43,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:43,162 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 12:54:43,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:54:43,162 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 12:54:43,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:43,162 INFO L85 PathProgramCache]: Analyzing trace with hash 2039461386, now seen corresponding path program 1 times [2024-06-14 12:54:43,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:43,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012616813] [2024-06-14 12:54:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:43,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:46,298 INFO 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 12:54:46,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:46,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012616813] [2024-06-14 12:54:46,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012616813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:46,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:46,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:54:46,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736085401] [2024-06-14 12:54:46,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:46,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:54:46,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:46,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:54:46,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:54:46,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:54:46,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 397 transitions, 6552 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:46,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:46,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:54:46,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:49,502 INFO L124 PetriNetUnfolderBase]: 7720/12167 cut-off events. [2024-06-14 12:54:49,502 INFO L125 PetriNetUnfolderBase]: For 593224/593228 co-relation queries the response was YES. [2024-06-14 12:54:49,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88730 conditions, 12167 events. 7720/12167 cut-off events. For 593224/593228 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 80796 event pairs, 2899 based on Foata normal form. 38/12204 useless extension candidates. Maximal degree in co-relation 88623. Up to 11295 conditions per place. [2024-06-14 12:54:49,626 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 338 selfloop transitions, 108 changer transitions 6/456 dead transitions. [2024-06-14 12:54:49,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 456 transitions, 8153 flow [2024-06-14 12:54:49,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:54:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:54:49,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:54:49,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:54:49,627 INFO L175 Difference]: Start difference. First operand has 220 places, 397 transitions, 6552 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:54:49,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 456 transitions, 8153 flow [2024-06-14 12:54:50,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 456 transitions, 7873 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 12:54:50,948 INFO L231 Difference]: Finished difference. Result has 226 places, 421 transitions, 7094 flow [2024-06-14 12:54:50,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6296, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7094, PETRI_PLACES=226, PETRI_TRANSITIONS=421} [2024-06-14 12:54:50,949 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-14 12:54:50,949 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 421 transitions, 7094 flow [2024-06-14 12:54:50,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:50,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:50,949 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] [2024-06-14 12:54:50,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:54:50,950 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 12:54:50,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:50,950 INFO L85 PathProgramCache]: Analyzing trace with hash -2078374390, now seen corresponding path program 2 times [2024-06-14 12:54:50,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:50,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276810315] [2024-06-14 12:54:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:50,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:54:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:54:54,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:54:54,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276810315] [2024-06-14 12:54:54,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276810315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:54:54,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:54:54,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:54:54,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399590718] [2024-06-14 12:54:54,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:54:54,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:54:54,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:54:54,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:54:54,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:54:54,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:54:54,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 421 transitions, 7094 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:54,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:54:54,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:54:54,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:54:57,707 INFO L124 PetriNetUnfolderBase]: 7568/11967 cut-off events. [2024-06-14 12:54:57,707 INFO L125 PetriNetUnfolderBase]: For 557977/557989 co-relation queries the response was YES. [2024-06-14 12:54:57,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85452 conditions, 11967 events. 7568/11967 cut-off events. For 557977/557989 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 79568 event pairs, 2782 based on Foata normal form. 34/12000 useless extension candidates. Maximal degree in co-relation 85341. Up to 10311 conditions per place. [2024-06-14 12:54:57,836 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 283 selfloop transitions, 170 changer transitions 2/459 dead transitions. [2024-06-14 12:54:57,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 459 transitions, 8452 flow [2024-06-14 12:54:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:54:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:54:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 12:54:57,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-14 12:54:57,837 INFO L175 Difference]: Start difference. First operand has 226 places, 421 transitions, 7094 flow. Second operand 10 states and 168 transitions. [2024-06-14 12:54:57,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 459 transitions, 8452 flow [2024-06-14 12:54:59,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 459 transitions, 8255 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 12:54:59,066 INFO L231 Difference]: Finished difference. Result has 231 places, 427 transitions, 7401 flow [2024-06-14 12:54:59,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6897, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7401, PETRI_PLACES=231, PETRI_TRANSITIONS=427} [2024-06-14 12:54:59,067 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-14 12:54:59,067 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 427 transitions, 7401 flow [2024-06-14 12:54:59,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:54:59,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:54:59,067 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 12:54:59,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:54:59,067 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 12:54:59,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:54:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2078137240, now seen corresponding path program 3 times [2024-06-14 12:54:59,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:54:59,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396361133] [2024-06-14 12:54:59,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:54:59,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:54:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:03,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:03,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396361133] [2024-06-14 12:55:03,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396361133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:03,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:03,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:55:03,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215800796] [2024-06-14 12:55:03,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:03,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:55:03,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:55:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:55:03,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:55:03,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 427 transitions, 7401 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:55:03,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:03,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:55:03,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:06,165 INFO L124 PetriNetUnfolderBase]: 7496/11887 cut-off events. [2024-06-14 12:55:06,165 INFO L125 PetriNetUnfolderBase]: For 555983/555995 co-relation queries the response was YES. [2024-06-14 12:55:06,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85183 conditions, 11887 events. 7496/11887 cut-off events. For 555983/555995 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 79257 event pairs, 2705 based on Foata normal form. 18/11904 useless extension candidates. Maximal degree in co-relation 85071. Up to 10279 conditions per place. [2024-06-14 12:55:06,289 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 282 selfloop transitions, 164 changer transitions 4/454 dead transitions. [2024-06-14 12:55:06,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 454 transitions, 8465 flow [2024-06-14 12:55:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:55:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:55:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 12:55:06,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-14 12:55:06,290 INFO L175 Difference]: Start difference. First operand has 231 places, 427 transitions, 7401 flow. Second operand 9 states and 151 transitions. [2024-06-14 12:55:06,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 454 transitions, 8465 flow [2024-06-14 12:55:07,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 454 transitions, 8244 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 12:55:07,787 INFO L231 Difference]: Finished difference. Result has 235 places, 423 transitions, 7430 flow [2024-06-14 12:55:07,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7180, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7430, PETRI_PLACES=235, PETRI_TRANSITIONS=423} [2024-06-14 12:55:07,788 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-14 12:55:07,788 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 423 transitions, 7430 flow [2024-06-14 12:55:07,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:55:07,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:07,788 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 12:55:07,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:55:07,789 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 12:55:07,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:07,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1459748164, now seen corresponding path program 1 times [2024-06-14 12:55:07,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:07,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566223569] [2024-06-14 12:55:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:07,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:11,828 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 12:55:11,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:11,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566223569] [2024-06-14 12:55:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566223569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:11,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:11,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:55:11,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455720379] [2024-06-14 12:55:11,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:11,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:55:11,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:55:11,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:55:11,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:55:11,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 423 transitions, 7430 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:55:11,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:11,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:55:11,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:15,035 INFO L124 PetriNetUnfolderBase]: 7408/11771 cut-off events. [2024-06-14 12:55:15,036 INFO L125 PetriNetUnfolderBase]: For 574248/574254 co-relation queries the response was YES. [2024-06-14 12:55:15,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84477 conditions, 11771 events. 7408/11771 cut-off events. For 574248/574254 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 78737 event pairs, 2967 based on Foata normal form. 8/11778 useless extension candidates. Maximal degree in co-relation 84365. Up to 11371 conditions per place. [2024-06-14 12:55:15,156 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 420 selfloop transitions, 25 changer transitions 0/449 dead transitions. [2024-06-14 12:55:15,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 449 transitions, 8446 flow [2024-06-14 12:55:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:55:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:55:15,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 12:55:15,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-14 12:55:15,157 INFO L175 Difference]: Start difference. First operand has 235 places, 423 transitions, 7430 flow. Second operand 8 states and 124 transitions. [2024-06-14 12:55:15,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 449 transitions, 8446 flow [2024-06-14 12:55:16,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 449 transitions, 8190 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 12:55:16,418 INFO L231 Difference]: Finished difference. Result has 237 places, 425 transitions, 7286 flow [2024-06-14 12:55:16,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7174, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7286, PETRI_PLACES=237, PETRI_TRANSITIONS=425} [2024-06-14 12:55:16,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-14 12:55:16,419 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 425 transitions, 7286 flow [2024-06-14 12:55:16,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:55:16,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:16,419 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 12:55:16,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:55:16,419 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 12:55:16,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:16,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2055034444, now seen corresponding path program 2 times [2024-06-14 12:55:16,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:16,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619883993] [2024-06-14 12:55:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:16,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:19,984 INFO 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 12:55:19,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:19,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619883993] [2024-06-14 12:55:19,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619883993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:19,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:19,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:55:19,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608798207] [2024-06-14 12:55:19,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:19,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:55:19,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:19,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:55:19,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:55:20,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:55:20,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 425 transitions, 7286 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:55:20,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:20,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:55:20,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:23,561 INFO L124 PetriNetUnfolderBase]: 7482/11790 cut-off events. [2024-06-14 12:55:23,562 INFO L125 PetriNetUnfolderBase]: For 609406/609408 co-relation queries the response was YES. [2024-06-14 12:55:23,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85375 conditions, 11790 events. 7482/11790 cut-off events. For 609406/609408 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 77831 event pairs, 2158 based on Foata normal form. 2/11786 useless extension candidates. Maximal degree in co-relation 85262. Up to 8804 conditions per place. [2024-06-14 12:55:23,687 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 193 selfloop transitions, 294 changer transitions 0/491 dead transitions. [2024-06-14 12:55:23,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 491 transitions, 9308 flow [2024-06-14 12:55:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:55:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:55:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:55:23,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 12:55:23,688 INFO L175 Difference]: Start difference. First operand has 237 places, 425 transitions, 7286 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:55:23,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 491 transitions, 9308 flow [2024-06-14 12:55:24,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 491 transitions, 9218 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:55:24,965 INFO L231 Difference]: Finished difference. Result has 241 places, 451 transitions, 8514 flow [2024-06-14 12:55:24,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7196, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8514, PETRI_PLACES=241, PETRI_TRANSITIONS=451} [2024-06-14 12:55:24,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 197 predicate places. [2024-06-14 12:55:24,965 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 451 transitions, 8514 flow [2024-06-14 12:55:24,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:55:24,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:24,966 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 12:55:24,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:55:24,966 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 12:55:24,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:24,966 INFO L85 PathProgramCache]: Analyzing trace with hash 464040110, now seen corresponding path program 3 times [2024-06-14 12:55:24,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:24,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740077402] [2024-06-14 12:55:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:24,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:28,271 INFO 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 12:55:28,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:28,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740077402] [2024-06-14 12:55:28,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740077402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:28,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:28,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:55:28,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709672965] [2024-06-14 12:55:28,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:28,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:55:28,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:28,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:55:28,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:55:28,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:55:28,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 451 transitions, 8514 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:55:28,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:28,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:55:28,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:31,901 INFO L124 PetriNetUnfolderBase]: 7476/11834 cut-off events. [2024-06-14 12:55:31,901 INFO L125 PetriNetUnfolderBase]: For 646569/646571 co-relation queries the response was YES. [2024-06-14 12:55:31,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90314 conditions, 11834 events. 7476/11834 cut-off events. For 646569/646571 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 78564 event pairs, 2831 based on Foata normal form. 2/11830 useless extension candidates. Maximal degree in co-relation 90198. Up to 10986 conditions per place. [2024-06-14 12:55:32,018 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 362 selfloop transitions, 120 changer transitions 0/486 dead transitions. [2024-06-14 12:55:32,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 486 transitions, 9752 flow [2024-06-14 12:55:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:55:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:55:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:55:32,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:55:32,019 INFO L175 Difference]: Start difference. First operand has 241 places, 451 transitions, 8514 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:55:32,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 486 transitions, 9752 flow [2024-06-14 12:55:33,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 486 transitions, 9598 flow, removed 76 selfloop flow, removed 1 redundant places. [2024-06-14 12:55:33,527 INFO L231 Difference]: Finished difference. Result has 250 places, 453 transitions, 8708 flow [2024-06-14 12:55:33,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8370, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8708, PETRI_PLACES=250, PETRI_TRANSITIONS=453} [2024-06-14 12:55:33,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-14 12:55:33,527 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 453 transitions, 8708 flow [2024-06-14 12:55:33,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:55:33,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:33,528 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 12:55:33,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:55:33,528 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 12:55:33,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:33,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2089866776, now seen corresponding path program 4 times [2024-06-14 12:55:33,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:33,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134681251] [2024-06-14 12:55:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:33,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:36,802 INFO 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 12:55:36,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:36,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134681251] [2024-06-14 12:55:36,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134681251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:36,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:36,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:55:36,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822201444] [2024-06-14 12:55:36,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:36,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:55:36,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:36,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:55:36,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:55:36,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:55:36,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 453 transitions, 8708 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:55:36,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:36,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:55:36,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:40,108 INFO L124 PetriNetUnfolderBase]: 7368/11667 cut-off events. [2024-06-14 12:55:40,108 INFO L125 PetriNetUnfolderBase]: For 657894/657896 co-relation queries the response was YES. [2024-06-14 12:55:40,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88581 conditions, 11667 events. 7368/11667 cut-off events. For 657894/657896 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 77380 event pairs, 2868 based on Foata normal form. 12/11673 useless extension candidates. Maximal degree in co-relation 88461. Up to 10997 conditions per place. [2024-06-14 12:55:40,264 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 368 selfloop transitions, 99 changer transitions 9/480 dead transitions. [2024-06-14 12:55:40,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 480 transitions, 9740 flow [2024-06-14 12:55:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:55:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:55:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 12:55:40,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 12:55:40,272 INFO L175 Difference]: Start difference. First operand has 250 places, 453 transitions, 8708 flow. Second operand 9 states and 146 transitions. [2024-06-14 12:55:40,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 480 transitions, 9740 flow [2024-06-14 12:55:42,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 480 transitions, 9428 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 12:55:42,182 INFO L231 Difference]: Finished difference. Result has 253 places, 445 transitions, 8403 flow [2024-06-14 12:55:42,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8396, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8403, PETRI_PLACES=253, PETRI_TRANSITIONS=445} [2024-06-14 12:55:42,182 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-14 12:55:42,182 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 445 transitions, 8403 flow [2024-06-14 12:55:42,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:55:42,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:42,182 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 12:55:42,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:55:42,183 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 12:55:42,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:42,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2054648494, now seen corresponding path program 4 times [2024-06-14 12:55:42,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:42,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046788172] [2024-06-14 12:55:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:42,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:45,173 INFO 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 12:55:45,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:45,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046788172] [2024-06-14 12:55:45,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046788172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:45,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:45,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:55:45,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072509593] [2024-06-14 12:55:45,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:45,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:55:45,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:45,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:55:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:55:45,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:55:45,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 445 transitions, 8403 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:55:45,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:45,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:55:45,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:48,620 INFO L124 PetriNetUnfolderBase]: 7226/11414 cut-off events. [2024-06-14 12:55:48,620 INFO L125 PetriNetUnfolderBase]: For 663317/663319 co-relation queries the response was YES. [2024-06-14 12:55:48,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86573 conditions, 11414 events. 7226/11414 cut-off events. For 663317/663319 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 75202 event pairs, 2147 based on Foata normal form. 2/11410 useless extension candidates. Maximal degree in co-relation 86452. Up to 8650 conditions per place. [2024-06-14 12:55:48,770 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 183 selfloop transitions, 293 changer transitions 0/480 dead transitions. [2024-06-14 12:55:48,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 480 transitions, 9789 flow [2024-06-14 12:55:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:55:48,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:55:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:55:48,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-14 12:55:48,772 INFO L175 Difference]: Start difference. First operand has 253 places, 445 transitions, 8403 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:55:48,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 480 transitions, 9789 flow [2024-06-14 12:55:50,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 480 transitions, 9181 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-14 12:55:50,418 INFO L231 Difference]: Finished difference. Result has 249 places, 446 transitions, 8417 flow [2024-06-14 12:55:50,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8417, PETRI_PLACES=249, PETRI_TRANSITIONS=446} [2024-06-14 12:55:50,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-14 12:55:50,419 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 446 transitions, 8417 flow [2024-06-14 12:55:50,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:55:50,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:50,419 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 12:55:50,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:55:50,419 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 12:55:50,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:50,420 INFO L85 PathProgramCache]: Analyzing trace with hash 818839016, now seen corresponding path program 5 times [2024-06-14 12:55:50,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:50,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703243783] [2024-06-14 12:55:50,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:50,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:55:53,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:55:53,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:55:53,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703243783] [2024-06-14 12:55:53,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703243783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:55:53,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:55:53,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:55:53,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351219032] [2024-06-14 12:55:53,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:55:53,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:55:53,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:55:53,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:55:53,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:55:53,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:55:53,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 446 transitions, 8417 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:55:53,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:55:53,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:55:53,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:55:56,825 INFO L124 PetriNetUnfolderBase]: 7459/11762 cut-off events. [2024-06-14 12:55:56,825 INFO L125 PetriNetUnfolderBase]: For 720278/720280 co-relation queries the response was YES. [2024-06-14 12:55:56,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91898 conditions, 11762 events. 7459/11762 cut-off events. For 720278/720280 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 77609 event pairs, 2753 based on Foata normal form. 6/11762 useless extension candidates. Maximal degree in co-relation 91777. Up to 10767 conditions per place. [2024-06-14 12:55:56,961 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 343 selfloop transitions, 151 changer transitions 0/498 dead transitions. [2024-06-14 12:55:56,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 498 transitions, 10214 flow [2024-06-14 12:55:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:55:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:55:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:55:56,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:55:56,962 INFO L175 Difference]: Start difference. First operand has 249 places, 446 transitions, 8417 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:55:56,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 498 transitions, 10214 flow [2024-06-14 12:55:58,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 498 transitions, 9625 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 12:55:58,588 INFO L231 Difference]: Finished difference. Result has 255 places, 471 transitions, 8786 flow [2024-06-14 12:55:58,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7862, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8786, PETRI_PLACES=255, PETRI_TRANSITIONS=471} [2024-06-14 12:55:58,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-14 12:55:58,589 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 471 transitions, 8786 flow [2024-06-14 12:55:58,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:55:58,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:55:58,589 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 12:55:58,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:55:58,589 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 12:55:58,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:55:58,589 INFO L85 PathProgramCache]: Analyzing trace with hash 818423306, now seen corresponding path program 6 times [2024-06-14 12:55:58,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:55:58,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228300035] [2024-06-14 12:55:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:55:58,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:55:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:01,909 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 12:56:01,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:01,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228300035] [2024-06-14 12:56:01,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228300035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:01,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:01,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:01,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220667063] [2024-06-14 12:56:01,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:01,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:01,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:01,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:01,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:01,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:56:01,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 471 transitions, 8786 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:56:01,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:01,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:56:01,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:05,450 INFO L124 PetriNetUnfolderBase]: 7433/11743 cut-off events. [2024-06-14 12:56:05,450 INFO L125 PetriNetUnfolderBase]: For 727683/727685 co-relation queries the response was YES. [2024-06-14 12:56:05,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91028 conditions, 11743 events. 7433/11743 cut-off events. For 727683/727685 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 77688 event pairs, 2883 based on Foata normal form. 6/11743 useless extension candidates. Maximal degree in co-relation 90904. Up to 11133 conditions per place. [2024-06-14 12:56:05,593 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 388 selfloop transitions, 99 changer transitions 3/494 dead transitions. [2024-06-14 12:56:05,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 494 transitions, 9832 flow [2024-06-14 12:56:05,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:05,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:56:05,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-14 12:56:05,594 INFO L175 Difference]: Start difference. First operand has 255 places, 471 transitions, 8786 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:56:05,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 494 transitions, 9832 flow [2024-06-14 12:56:07,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 494 transitions, 9637 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:07,344 INFO L231 Difference]: Finished difference. Result has 261 places, 469 transitions, 8749 flow [2024-06-14 12:56:07,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8591, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8749, PETRI_PLACES=261, PETRI_TRANSITIONS=469} [2024-06-14 12:56:07,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-14 12:56:07,345 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 469 transitions, 8749 flow [2024-06-14 12:56:07,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:56:07,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:07,345 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 12:56:07,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:56:07,345 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 12:56:07,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:07,346 INFO L85 PathProgramCache]: Analyzing trace with hash 818660270, now seen corresponding path program 5 times [2024-06-14 12:56:07,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:07,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669674302] [2024-06-14 12:56:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:07,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:10,539 INFO 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 12:56:10,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:10,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669674302] [2024-06-14 12:56:10,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669674302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:10,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:10,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:10,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101839043] [2024-06-14 12:56:10,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:10,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:10,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:10,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:10,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:10,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:56:10,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 469 transitions, 8749 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:56:10,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:10,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:56:10,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:13,972 INFO L124 PetriNetUnfolderBase]: 7391/11657 cut-off events. [2024-06-14 12:56:13,973 INFO L125 PetriNetUnfolderBase]: For 744036/744038 co-relation queries the response was YES. [2024-06-14 12:56:14,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90215 conditions, 11657 events. 7391/11657 cut-off events. For 744036/744038 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 76845 event pairs, 2766 based on Foata normal form. 6/11657 useless extension candidates. Maximal degree in co-relation 90090. Up to 10721 conditions per place. [2024-06-14 12:56:14,098 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 343 selfloop transitions, 149 changer transitions 0/496 dead transitions. [2024-06-14 12:56:14,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 496 transitions, 10023 flow [2024-06-14 12:56:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:14,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:56:14,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:56:14,102 INFO L175 Difference]: Start difference. First operand has 261 places, 469 transitions, 8749 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:56:14,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 496 transitions, 10023 flow [2024-06-14 12:56:15,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 496 transitions, 9794 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:15,577 INFO L231 Difference]: Finished difference. Result has 264 places, 469 transitions, 8825 flow [2024-06-14 12:56:15,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8520, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8825, PETRI_PLACES=264, PETRI_TRANSITIONS=469} [2024-06-14 12:56:15,577 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-14 12:56:15,577 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 469 transitions, 8825 flow [2024-06-14 12:56:15,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:56:15,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:15,578 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 12:56:15,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:56:15,578 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 12:56:15,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:15,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1755829364, now seen corresponding path program 6 times [2024-06-14 12:56:15,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:15,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452751346] [2024-06-14 12:56:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:15,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:18,830 INFO 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 12:56:18,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:18,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452751346] [2024-06-14 12:56:18,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452751346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:18,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:18,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:18,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742839945] [2024-06-14 12:56:18,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:18,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:18,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:18,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:18,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:18,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:56:18,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 469 transitions, 8825 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:56:18,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:18,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:56:18,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:22,379 INFO L124 PetriNetUnfolderBase]: 7373/11664 cut-off events. [2024-06-14 12:56:22,379 INFO L125 PetriNetUnfolderBase]: For 757877/757879 co-relation queries the response was YES. [2024-06-14 12:56:22,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90484 conditions, 11664 events. 7373/11664 cut-off events. For 757877/757879 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 77007 event pairs, 1956 based on Foata normal form. 6/11664 useless extension candidates. Maximal degree in co-relation 90358. Up to 9031 conditions per place. [2024-06-14 12:56:22,542 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 191 selfloop transitions, 318 changer transitions 0/513 dead transitions. [2024-06-14 12:56:22,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 513 transitions, 10342 flow [2024-06-14 12:56:22,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:56:22,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 12:56:22,543 INFO L175 Difference]: Start difference. First operand has 264 places, 469 transitions, 8825 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:56:22,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 513 transitions, 10342 flow [2024-06-14 12:56:25,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 513 transitions, 9936 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-14 12:56:25,025 INFO L231 Difference]: Finished difference. Result has 267 places, 470 transitions, 9217 flow [2024-06-14 12:56:25,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8419, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9217, PETRI_PLACES=267, PETRI_TRANSITIONS=470} [2024-06-14 12:56:25,026 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-14 12:56:25,026 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 470 transitions, 9217 flow [2024-06-14 12:56:25,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:56:25,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:25,027 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 12:56:25,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:56:25,027 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 12:56:25,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:25,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1533463388, now seen corresponding path program 7 times [2024-06-14 12:56:25,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:25,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666668637] [2024-06-14 12:56:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:25,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:28,350 INFO 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 12:56:28,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:28,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666668637] [2024-06-14 12:56:28,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666668637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:28,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:28,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:28,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115361309] [2024-06-14 12:56:28,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:28,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:28,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:28,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:28,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:28,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:56:28,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 470 transitions, 9217 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:56:28,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:28,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:56:28,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:31,771 INFO L124 PetriNetUnfolderBase]: 7377/11708 cut-off events. [2024-06-14 12:56:31,771 INFO L125 PetriNetUnfolderBase]: For 788465/788481 co-relation queries the response was YES. [2024-06-14 12:56:31,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92581 conditions, 11708 events. 7377/11708 cut-off events. For 788465/788481 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 77686 event pairs, 2061 based on Foata normal form. 13/11715 useless extension candidates. Maximal degree in co-relation 92453. Up to 9030 conditions per place. [2024-06-14 12:56:31,930 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 233 selfloop transitions, 263 changer transitions 0/500 dead transitions. [2024-06-14 12:56:31,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 500 transitions, 10679 flow [2024-06-14 12:56:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:56:31,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:56:31,932 INFO L175 Difference]: Start difference. First operand has 267 places, 470 transitions, 9217 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:56:31,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 500 transitions, 10679 flow [2024-06-14 12:56:33,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 500 transitions, 10148 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 12:56:33,955 INFO L231 Difference]: Finished difference. Result has 267 places, 473 transitions, 9292 flow [2024-06-14 12:56:33,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8695, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9292, PETRI_PLACES=267, PETRI_TRANSITIONS=473} [2024-06-14 12:56:33,955 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 223 predicate places. [2024-06-14 12:56:33,955 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 473 transitions, 9292 flow [2024-06-14 12:56:33,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:56:33,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:33,956 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 12:56:33,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:56:33,956 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 12:56:33,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1527749468, now seen corresponding path program 8 times [2024-06-14 12:56:33,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:33,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654146215] [2024-06-14 12:56:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:33,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:36,985 INFO 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 12:56:36,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:36,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654146215] [2024-06-14 12:56:36,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654146215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:36,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:36,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:36,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787527658] [2024-06-14 12:56:36,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:36,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:36,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:36,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:36,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:36,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:56:36,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 473 transitions, 9292 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:56:36,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:36,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:56:36,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:40,079 INFO L124 PetriNetUnfolderBase]: 7419/11766 cut-off events. [2024-06-14 12:56:40,079 INFO L125 PetriNetUnfolderBase]: For 795693/795709 co-relation queries the response was YES. [2024-06-14 12:56:40,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93335 conditions, 11766 events. 7419/11766 cut-off events. For 795693/795709 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 78014 event pairs, 2079 based on Foata normal form. 11/11771 useless extension candidates. Maximal degree in co-relation 93207. Up to 9044 conditions per place. [2024-06-14 12:56:40,227 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 221 selfloop transitions, 281 changer transitions 0/506 dead transitions. [2024-06-14 12:56:40,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 506 transitions, 10860 flow [2024-06-14 12:56:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:56:40,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 12:56:40,229 INFO L175 Difference]: Start difference. First operand has 267 places, 473 transitions, 9292 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:56:40,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 506 transitions, 10860 flow [2024-06-14 12:56:42,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 506 transitions, 10320 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:42,197 INFO L231 Difference]: Finished difference. Result has 271 places, 480 transitions, 9515 flow [2024-06-14 12:56:42,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8760, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9515, PETRI_PLACES=271, PETRI_TRANSITIONS=480} [2024-06-14 12:56:42,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 227 predicate places. [2024-06-14 12:56:42,198 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 480 transitions, 9515 flow [2024-06-14 12:56:42,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:56:42,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:42,199 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 12:56:42,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:56:42,199 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 12:56:42,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:42,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1365148374, now seen corresponding path program 9 times [2024-06-14 12:56:42,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:42,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291086589] [2024-06-14 12:56:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:42,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:45,691 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 12:56:45,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:45,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291086589] [2024-06-14 12:56:45,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291086589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:45,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:45,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:45,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821414031] [2024-06-14 12:56:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:45,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:45,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:45,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:56:45,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 480 transitions, 9515 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:56:45,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:45,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:56:45,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:49,057 INFO L124 PetriNetUnfolderBase]: 7389/11676 cut-off events. [2024-06-14 12:56:49,058 INFO L125 PetriNetUnfolderBase]: For 817690/817692 co-relation queries the response was YES. [2024-06-14 12:56:49,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93226 conditions, 11676 events. 7389/11676 cut-off events. For 817690/817692 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 77025 event pairs, 1979 based on Foata normal form. 6/11676 useless extension candidates. Maximal degree in co-relation 93096. Up to 9028 conditions per place. [2024-06-14 12:56:49,207 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 192 selfloop transitions, 323 changer transitions 0/519 dead transitions. [2024-06-14 12:56:49,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 519 transitions, 11001 flow [2024-06-14 12:56:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:56:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:56:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 12:56:49,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 12:56:49,209 INFO L175 Difference]: Start difference. First operand has 271 places, 480 transitions, 9515 flow. Second operand 9 states and 169 transitions. [2024-06-14 12:56:49,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 519 transitions, 11001 flow [2024-06-14 12:56:51,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 519 transitions, 10559 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:51,379 INFO L231 Difference]: Finished difference. Result has 276 places, 480 transitions, 9731 flow [2024-06-14 12:56:51,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9073, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9731, PETRI_PLACES=276, PETRI_TRANSITIONS=480} [2024-06-14 12:56:51,380 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 12:56:51,380 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 480 transitions, 9731 flow [2024-06-14 12:56:51,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:56:51,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:51,380 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 12:56:51,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:56:51,380 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 12:56:51,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:51,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1928556218, now seen corresponding path program 10 times [2024-06-14 12:56:51,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:51,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864836622] [2024-06-14 12:56:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:51,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:55,041 INFO 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 12:56:55,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:55,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864836622] [2024-06-14 12:56:55,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864836622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:55,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:55,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:55,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948620865] [2024-06-14 12:56:55,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:55,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:55,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:55,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:55,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:55,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:56:55,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 480 transitions, 9731 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:56:55,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:55,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:56:55,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:58,677 INFO L124 PetriNetUnfolderBase]: 7347/11641 cut-off events. [2024-06-14 12:56:58,677 INFO L125 PetriNetUnfolderBase]: For 833919/833947 co-relation queries the response was YES. [2024-06-14 12:56:58,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93440 conditions, 11641 events. 7347/11641 cut-off events. For 833919/833947 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 77180 event pairs, 2856 based on Foata normal form. 23/11660 useless extension candidates. Maximal degree in co-relation 93309. Up to 11011 conditions per place. [2024-06-14 12:56:58,834 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 402 selfloop transitions, 93 changer transitions 3/502 dead transitions. [2024-06-14 12:56:58,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 502 transitions, 10828 flow [2024-06-14 12:56:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:56:58,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:56:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-14 12:56:58,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34418604651162793 [2024-06-14 12:56:58,835 INFO L175 Difference]: Start difference. First operand has 276 places, 480 transitions, 9731 flow. Second operand 10 states and 148 transitions. [2024-06-14 12:56:58,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 502 transitions, 10828 flow [2024-06-14 12:57:00,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 502 transitions, 10054 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-14 12:57:00,865 INFO L231 Difference]: Finished difference. Result has 277 places, 480 transitions, 9147 flow [2024-06-14 12:57:00,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8959, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9147, PETRI_PLACES=277, PETRI_TRANSITIONS=480} [2024-06-14 12:57:00,865 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-14 12:57:00,866 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 480 transitions, 9147 flow [2024-06-14 12:57:00,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:57:00,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:00,866 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 12:57:00,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:57:00,866 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 12:57:00,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:00,866 INFO L85 PathProgramCache]: Analyzing trace with hash -985483914, now seen corresponding path program 11 times [2024-06-14 12:57:00,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:00,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238183861] [2024-06-14 12:57:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:00,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:04,232 INFO 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 12:57:04,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:04,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238183861] [2024-06-14 12:57:04,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238183861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:04,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:04,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:04,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129213761] [2024-06-14 12:57:04,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:04,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:04,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:04,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:04,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:04,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:57:04,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 480 transitions, 9147 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:57:04,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:04,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:57:04,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:07,705 INFO L124 PetriNetUnfolderBase]: 7267/11508 cut-off events. [2024-06-14 12:57:07,705 INFO L125 PetriNetUnfolderBase]: For 815745/815755 co-relation queries the response was YES. [2024-06-14 12:57:07,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90502 conditions, 11508 events. 7267/11508 cut-off events. For 815745/815755 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 76216 event pairs, 2588 based on Foata normal form. 11/11518 useless extension candidates. Maximal degree in co-relation 90370. Up to 9552 conditions per place. [2024-06-14 12:57:07,837 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 286 selfloop transitions, 218 changer transitions 1/509 dead transitions. [2024-06-14 12:57:07,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 509 transitions, 10353 flow [2024-06-14 12:57:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:57:07,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:57:07,838 INFO L175 Difference]: Start difference. First operand has 277 places, 480 transitions, 9147 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:57:07,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 509 transitions, 10353 flow [2024-06-14 12:57:09,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 509 transitions, 10096 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-14 12:57:09,544 INFO L231 Difference]: Finished difference. Result has 277 places, 479 transitions, 9331 flow [2024-06-14 12:57:09,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8890, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9331, PETRI_PLACES=277, PETRI_TRANSITIONS=479} [2024-06-14 12:57:09,545 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-14 12:57:09,545 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 479 transitions, 9331 flow [2024-06-14 12:57:09,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:57:09,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:09,545 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 12:57:09,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:57:09,545 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 12:57:09,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:09,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1075512610, now seen corresponding path program 12 times [2024-06-14 12:57:09,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:09,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991014405] [2024-06-14 12:57:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:09,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:12,890 INFO 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 12:57:12,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:12,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991014405] [2024-06-14 12:57:12,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991014405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:12,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:12,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:12,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866584940] [2024-06-14 12:57:12,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:12,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:12,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:12,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:57:12,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 479 transitions, 9331 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:57:12,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:12,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:57:12,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:16,445 INFO L124 PetriNetUnfolderBase]: 6983/10980 cut-off events. [2024-06-14 12:57:16,446 INFO L125 PetriNetUnfolderBase]: For 837464/837470 co-relation queries the response was YES. [2024-06-14 12:57:16,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88135 conditions, 10980 events. 6983/10980 cut-off events. For 837464/837470 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 71425 event pairs, 2415 based on Foata normal form. 15/10994 useless extension candidates. Maximal degree in co-relation 88005. Up to 9121 conditions per place. [2024-06-14 12:57:16,564 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 274 selfloop transitions, 236 changer transitions 5/519 dead transitions. [2024-06-14 12:57:16,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 519 transitions, 10483 flow [2024-06-14 12:57:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 12:57:16,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 12:57:16,566 INFO L175 Difference]: Start difference. First operand has 277 places, 479 transitions, 9331 flow. Second operand 9 states and 167 transitions. [2024-06-14 12:57:16,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 519 transitions, 10483 flow [2024-06-14 12:57:18,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 519 transitions, 10113 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:18,613 INFO L231 Difference]: Finished difference. Result has 279 places, 474 transitions, 9361 flow [2024-06-14 12:57:18,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8961, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9361, PETRI_PLACES=279, PETRI_TRANSITIONS=474} [2024-06-14 12:57:18,613 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-14 12:57:18,613 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 474 transitions, 9361 flow [2024-06-14 12:57:18,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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 12:57:18,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:18,613 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 12:57:18,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:57:18,614 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 12:57:18,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:18,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1372359222, now seen corresponding path program 2 times [2024-06-14 12:57:18,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:18,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948146995] [2024-06-14 12:57:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:18,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:22,831 INFO 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 12:57:22,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:22,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948146995] [2024-06-14 12:57:22,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948146995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:22,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:22,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:22,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678893372] [2024-06-14 12:57:22,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:22,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:22,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:22,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:22,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:22,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:57:22,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 474 transitions, 9361 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:57:22,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:22,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:57:22,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:25,730 INFO L124 PetriNetUnfolderBase]: 6327/9932 cut-off events. [2024-06-14 12:57:25,730 INFO L125 PetriNetUnfolderBase]: For 811237/811253 co-relation queries the response was YES. [2024-06-14 12:57:25,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84225 conditions, 9932 events. 6327/9932 cut-off events. For 811237/811253 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 63088 event pairs, 2243 based on Foata normal form. 14/9943 useless extension candidates. Maximal degree in co-relation 84095. Up to 9606 conditions per place. [2024-06-14 12:57:25,836 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 457 selfloop transitions, 31 changer transitions 0/492 dead transitions. [2024-06-14 12:57:25,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 492 transitions, 10446 flow [2024-06-14 12:57:25,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:25,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-14 12:57:25,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554817275747508 [2024-06-14 12:57:25,837 INFO L175 Difference]: Start difference. First operand has 279 places, 474 transitions, 9361 flow. Second operand 7 states and 107 transitions. [2024-06-14 12:57:25,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 492 transitions, 10446 flow [2024-06-14 12:57:27,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 492 transitions, 9822 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 12:57:27,412 INFO L231 Difference]: Finished difference. Result has 275 places, 476 transitions, 8866 flow [2024-06-14 12:57:27,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8737, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8866, PETRI_PLACES=275, PETRI_TRANSITIONS=476} [2024-06-14 12:57:27,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 12:57:27,413 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 476 transitions, 8866 flow [2024-06-14 12:57:27,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:57:27,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:27,413 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 12:57:27,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:57:27,413 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 12:57:27,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:27,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1360740732, now seen corresponding path program 3 times [2024-06-14 12:57:27,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:27,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412404190] [2024-06-14 12:57:27,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:27,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:31,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:31,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412404190] [2024-06-14 12:57:31,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412404190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:31,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:31,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:31,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936539331] [2024-06-14 12:57:31,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:31,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:31,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:31,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:31,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:31,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:57:31,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 476 transitions, 8866 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:57:31,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:31,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:57:31,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:34,543 INFO L124 PetriNetUnfolderBase]: 6322/9937 cut-off events. [2024-06-14 12:57:34,543 INFO L125 PetriNetUnfolderBase]: For 771503/771509 co-relation queries the response was YES. [2024-06-14 12:57:34,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82114 conditions, 9937 events. 6322/9937 cut-off events. For 771503/771509 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 63168 event pairs, 2309 based on Foata normal form. 8/9944 useless extension candidates. Maximal degree in co-relation 81985. Up to 9605 conditions per place. [2024-06-14 12:57:34,650 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 467 selfloop transitions, 29 changer transitions 0/500 dead transitions. [2024-06-14 12:57:34,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 500 transitions, 9985 flow [2024-06-14 12:57:34,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:57:34,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-14 12:57:34,651 INFO L175 Difference]: Start difference. First operand has 275 places, 476 transitions, 8866 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:57:34,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 500 transitions, 9985 flow [2024-06-14 12:57:36,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 500 transitions, 9872 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:36,557 INFO L231 Difference]: Finished difference. Result has 277 places, 478 transitions, 8880 flow [2024-06-14 12:57:36,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8753, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8880, PETRI_PLACES=277, PETRI_TRANSITIONS=478} [2024-06-14 12:57:36,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-14 12:57:36,557 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 478 transitions, 8880 flow [2024-06-14 12:57:36,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:57:36,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:36,558 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 12:57:36,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:57:36,558 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 12:57:36,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:36,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1519169660, now seen corresponding path program 4 times [2024-06-14 12:57:36,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:36,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512673233] [2024-06-14 12:57:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:36,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:40,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:40,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512673233] [2024-06-14 12:57:40,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512673233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:40,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:40,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:40,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953023262] [2024-06-14 12:57:40,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:40,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:40,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:40,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:40,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:40,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:57:40,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 478 transitions, 8880 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:57:40,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:40,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:57:40,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:43,861 INFO L124 PetriNetUnfolderBase]: 6317/9942 cut-off events. [2024-06-14 12:57:43,861 INFO L125 PetriNetUnfolderBase]: For 790736/790752 co-relation queries the response was YES. [2024-06-14 12:57:43,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82363 conditions, 9942 events. 6317/9942 cut-off events. For 790736/790752 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 63317 event pairs, 2237 based on Foata normal form. 14/9953 useless extension candidates. Maximal degree in co-relation 82233. Up to 9564 conditions per place. [2024-06-14 12:57:44,191 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 454 selfloop transitions, 38 changer transitions 0/496 dead transitions. [2024-06-14 12:57:44,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 496 transitions, 9979 flow [2024-06-14 12:57:44,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-14 12:57:44,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554817275747508 [2024-06-14 12:57:44,192 INFO L175 Difference]: Start difference. First operand has 277 places, 478 transitions, 8880 flow. Second operand 7 states and 107 transitions. [2024-06-14 12:57:44,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 496 transitions, 9979 flow [2024-06-14 12:57:45,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 496 transitions, 9895 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:45,990 INFO L231 Difference]: Finished difference. Result has 280 places, 480 transitions, 8945 flow [2024-06-14 12:57:45,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8796, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8945, PETRI_PLACES=280, PETRI_TRANSITIONS=480} [2024-06-14 12:57:45,991 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-14 12:57:45,991 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 480 transitions, 8945 flow [2024-06-14 12:57:45,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:57:45,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:45,991 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 12:57:45,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:57:45,991 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 12:57:45,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash 700521068, now seen corresponding path program 1 times [2024-06-14 12:57:45,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:45,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495785814] [2024-06-14 12:57:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:45,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:49,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:49,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495785814] [2024-06-14 12:57:49,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495785814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:49,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:49,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:49,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985879272] [2024-06-14 12:57:49,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:49,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:49,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:49,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:49,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:49,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:57:49,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 480 transitions, 8945 flow. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:49,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:49,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:57:49,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:52,284 INFO L124 PetriNetUnfolderBase]: 6397/10048 cut-off events. [2024-06-14 12:57:52,284 INFO L125 PetriNetUnfolderBase]: For 840793/840797 co-relation queries the response was YES. [2024-06-14 12:57:52,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84180 conditions, 10048 events. 6397/10048 cut-off events. For 840793/840797 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 63848 event pairs, 2357 based on Foata normal form. 3/10050 useless extension candidates. Maximal degree in co-relation 84049. Up to 9485 conditions per place. [2024-06-14 12:57:52,426 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 469 selfloop transitions, 48 changer transitions 0/521 dead transitions. [2024-06-14 12:57:52,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 521 transitions, 10331 flow [2024-06-14 12:57:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:57:52,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:57:52,427 INFO L175 Difference]: Start difference. First operand has 280 places, 480 transitions, 8945 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:57:52,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 521 transitions, 10331 flow [2024-06-14 12:57:54,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 521 transitions, 10198 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:54,262 INFO L231 Difference]: Finished difference. Result has 283 places, 484 transitions, 9025 flow [2024-06-14 12:57:54,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8812, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9025, PETRI_PLACES=283, PETRI_TRANSITIONS=484} [2024-06-14 12:57:54,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-14 12:57:54,263 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 484 transitions, 9025 flow [2024-06-14 12:57:54,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:54,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:54,263 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 12:57:54,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:57:54,263 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 12:57:54,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:54,263 INFO L85 PathProgramCache]: Analyzing trace with hash 700581518, now seen corresponding path program 2 times [2024-06-14 12:57:54,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:54,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593540129] [2024-06-14 12:57:54,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:54,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:57,480 INFO 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 12:57:57,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:57,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593540129] [2024-06-14 12:57:57,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593540129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:57,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:57,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:57,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234756839] [2024-06-14 12:57:57,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:57,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:57,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:57,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:57,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:57,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:57:57,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 484 transitions, 9025 flow. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:57,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:57,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:57:57,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:00,708 INFO L124 PetriNetUnfolderBase]: 6405/10060 cut-off events. [2024-06-14 12:58:00,708 INFO L125 PetriNetUnfolderBase]: For 866790/866794 co-relation queries the response was YES. [2024-06-14 12:58:00,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84833 conditions, 10060 events. 6405/10060 cut-off events. For 866790/866794 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 63941 event pairs, 2391 based on Foata normal form. 3/10062 useless extension candidates. Maximal degree in co-relation 84701. Up to 9622 conditions per place. [2024-06-14 12:58:00,827 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 464 selfloop transitions, 45 changer transitions 0/513 dead transitions. [2024-06-14 12:58:00,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 513 transitions, 10175 flow [2024-06-14 12:58:00,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 12:58:00,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-14 12:58:00,828 INFO L175 Difference]: Start difference. First operand has 283 places, 484 transitions, 9025 flow. Second operand 8 states and 134 transitions. [2024-06-14 12:58:00,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 513 transitions, 10175 flow [2024-06-14 12:58:02,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 513 transitions, 10062 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 12:58:02,353 INFO L231 Difference]: Finished difference. Result has 287 places, 486 transitions, 9069 flow [2024-06-14 12:58:02,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8916, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9069, PETRI_PLACES=287, PETRI_TRANSITIONS=486} [2024-06-14 12:58:02,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-14 12:58:02,354 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 486 transitions, 9069 flow [2024-06-14 12:58:02,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:02,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:02,354 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 12:58:02,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:58:02,354 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 12:58:02,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:02,354 INFO L85 PathProgramCache]: Analyzing trace with hash 818669198, now seen corresponding path program 3 times [2024-06-14 12:58:02,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:02,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903484785] [2024-06-14 12:58:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:02,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:05,798 INFO 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 12:58:05,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:05,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903484785] [2024-06-14 12:58:05,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903484785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:05,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:05,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:05,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585766061] [2024-06-14 12:58:05,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:05,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:05,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:05,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:05,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:05,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:58:05,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 486 transitions, 9069 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:58:05,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:05,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:58:05,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:09,075 INFO L124 PetriNetUnfolderBase]: 6457/10155 cut-off events. [2024-06-14 12:58:09,075 INFO L125 PetriNetUnfolderBase]: For 916263/916267 co-relation queries the response was YES. [2024-06-14 12:58:09,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85882 conditions, 10155 events. 6457/10155 cut-off events. For 916263/916267 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 64976 event pairs, 2543 based on Foata normal form. 15/10169 useless extension candidates. Maximal degree in co-relation 85748. Up to 9758 conditions per place. [2024-06-14 12:58:09,189 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 485 selfloop transitions, 26 changer transitions 0/515 dead transitions. [2024-06-14 12:58:09,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 515 transitions, 10241 flow [2024-06-14 12:58:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 12:58:09,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-14 12:58:09,190 INFO L175 Difference]: Start difference. First operand has 287 places, 486 transitions, 9069 flow. Second operand 9 states and 141 transitions. [2024-06-14 12:58:09,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 515 transitions, 10241 flow [2024-06-14 12:58:11,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 515 transitions, 10108 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:58:11,514 INFO L231 Difference]: Finished difference. Result has 290 places, 488 transitions, 9056 flow [2024-06-14 12:58:11,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8936, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9056, PETRI_PLACES=290, PETRI_TRANSITIONS=488} [2024-06-14 12:58:11,515 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-14 12:58:11,515 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 488 transitions, 9056 flow [2024-06-14 12:58:11,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:58:11,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:11,515 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 12:58:11,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:58:11,515 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 12:58:11,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:11,515 INFO L85 PathProgramCache]: Analyzing trace with hash 818853896, now seen corresponding path program 1 times [2024-06-14 12:58:11,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:11,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728995308] [2024-06-14 12:58:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:11,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:15,119 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 12:58:15,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:15,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728995308] [2024-06-14 12:58:15,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728995308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:15,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:15,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:15,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383653241] [2024-06-14 12:58:15,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:15,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:15,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:15,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:15,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:15,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:58:15,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 488 transitions, 9056 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:58:15,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:15,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:58:15,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:18,351 INFO L124 PetriNetUnfolderBase]: 6509/10235 cut-off events. [2024-06-14 12:58:18,351 INFO L125 PetriNetUnfolderBase]: For 943082/943086 co-relation queries the response was YES. [2024-06-14 12:58:18,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86639 conditions, 10235 events. 6509/10235 cut-off events. For 943082/943086 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 65480 event pairs, 2551 based on Foata normal form. 15/10249 useless extension candidates. Maximal degree in co-relation 86504. Up to 9838 conditions per place. [2024-06-14 12:58:18,706 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 487 selfloop transitions, 26 changer transitions 0/517 dead transitions. [2024-06-14 12:58:18,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 517 transitions, 10210 flow [2024-06-14 12:58:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 12:58:18,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-14 12:58:18,707 INFO L175 Difference]: Start difference. First operand has 290 places, 488 transitions, 9056 flow. Second operand 9 states and 141 transitions. [2024-06-14 12:58:18,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 517 transitions, 10210 flow [2024-06-14 12:58:20,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 517 transitions, 10122 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:20,692 INFO L231 Difference]: Finished difference. Result has 292 places, 490 transitions, 9066 flow [2024-06-14 12:58:20,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8968, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9066, PETRI_PLACES=292, PETRI_TRANSITIONS=490} [2024-06-14 12:58:20,692 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-14 12:58:20,693 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 490 transitions, 9066 flow [2024-06-14 12:58:20,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:58:20,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:20,693 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 12:58:20,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:58:20,693 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 12:58:20,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash -39855314, now seen corresponding path program 4 times [2024-06-14 12:58:20,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:20,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220398905] [2024-06-14 12:58:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:20,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:23,884 INFO 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 12:58:23,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:23,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220398905] [2024-06-14 12:58:23,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220398905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:23,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:23,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:23,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396054791] [2024-06-14 12:58:23,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:23,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:23,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:23,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:23,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:23,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:58:23,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 490 transitions, 9066 flow. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:23,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:23,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:58:23,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:27,181 INFO L124 PetriNetUnfolderBase]: 6476/10173 cut-off events. [2024-06-14 12:58:27,181 INFO L125 PetriNetUnfolderBase]: For 941238/941242 co-relation queries the response was YES. [2024-06-14 12:58:27,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85833 conditions, 10173 events. 6476/10173 cut-off events. For 941238/941242 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 64721 event pairs, 2352 based on Foata normal form. 15/10187 useless extension candidates. Maximal degree in co-relation 85697. Up to 9627 conditions per place. [2024-06-14 12:58:27,321 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 476 selfloop transitions, 46 changer transitions 0/526 dead transitions. [2024-06-14 12:58:27,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 526 transitions, 10232 flow [2024-06-14 12:58:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 12:58:27,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 12:58:27,322 INFO L175 Difference]: Start difference. First operand has 292 places, 490 transitions, 9066 flow. Second operand 9 states and 152 transitions. [2024-06-14 12:58:27,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 526 transitions, 10232 flow [2024-06-14 12:58:29,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 526 transitions, 10126 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:29,904 INFO L231 Difference]: Finished difference. Result has 294 places, 490 transitions, 9065 flow [2024-06-14 12:58:29,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8960, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9065, PETRI_PLACES=294, PETRI_TRANSITIONS=490} [2024-06-14 12:58:29,904 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-14 12:58:29,904 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 490 transitions, 9065 flow [2024-06-14 12:58:29,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:58:29,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:29,905 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 12:58:29,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:58:29,905 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 12:58:29,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:29,905 INFO L85 PathProgramCache]: Analyzing trace with hash -39670616, now seen corresponding path program 2 times [2024-06-14 12:58:29,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:29,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379692518] [2024-06-14 12:58:29,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:29,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:33,431 INFO 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 12:58:33,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:33,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379692518] [2024-06-14 12:58:33,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379692518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:33,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:33,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:33,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905493935] [2024-06-14 12:58:33,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:33,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:33,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:33,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:33,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:58:33,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 490 transitions, 9065 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:58:33,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:33,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:58:33,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:36,726 INFO L124 PetriNetUnfolderBase]: 6528/10253 cut-off events. [2024-06-14 12:58:36,727 INFO L125 PetriNetUnfolderBase]: For 968075/968079 co-relation queries the response was YES. [2024-06-14 12:58:36,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86676 conditions, 10253 events. 6528/10253 cut-off events. For 968075/968079 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 65378 event pairs, 2396 based on Foata normal form. 15/10267 useless extension candidates. Maximal degree in co-relation 86539. Up to 9729 conditions per place. [2024-06-14 12:58:36,850 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 477 selfloop transitions, 43 changer transitions 0/524 dead transitions. [2024-06-14 12:58:36,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 524 transitions, 10253 flow [2024-06-14 12:58:36,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:58:36,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 12:58:36,851 INFO L175 Difference]: Start difference. First operand has 294 places, 490 transitions, 9065 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:58:36,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 524 transitions, 10253 flow [2024-06-14 12:58:39,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 524 transitions, 10152 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 12:58:39,117 INFO L231 Difference]: Finished difference. Result has 295 places, 492 transitions, 9104 flow [2024-06-14 12:58:39,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8964, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9104, PETRI_PLACES=295, PETRI_TRANSITIONS=492} [2024-06-14 12:58:39,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-14 12:58:39,117 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 492 transitions, 9104 flow [2024-06-14 12:58:39,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:58:39,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:39,117 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 12:58:39,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:58:39,118 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 12:58:39,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:39,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1519460378, now seen corresponding path program 3 times [2024-06-14 12:58:39,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:39,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085155533] [2024-06-14 12:58:39,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:39,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:42,665 INFO 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 12:58:42,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:42,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085155533] [2024-06-14 12:58:42,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085155533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:42,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:42,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:42,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950560777] [2024-06-14 12:58:42,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:42,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:42,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:42,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:42,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:42,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:58:42,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 492 transitions, 9104 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:58:42,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:42,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:58:42,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:45,946 INFO L124 PetriNetUnfolderBase]: 6536/10266 cut-off events. [2024-06-14 12:58:45,947 INFO L125 PetriNetUnfolderBase]: For 943903/943909 co-relation queries the response was YES. [2024-06-14 12:58:46,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86900 conditions, 10266 events. 6536/10266 cut-off events. For 943903/943909 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 65417 event pairs, 2377 based on Foata normal form. 5/10270 useless extension candidates. Maximal degree in co-relation 86762. Up to 9851 conditions per place. [2024-06-14 12:58:46,066 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 472 selfloop transitions, 40 changer transitions 0/516 dead transitions. [2024-06-14 12:58:46,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 516 transitions, 10230 flow [2024-06-14 12:58:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:58:46,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:58:46,067 INFO L175 Difference]: Start difference. First operand has 295 places, 492 transitions, 9104 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:58:46,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 516 transitions, 10230 flow [2024-06-14 12:58:48,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 516 transitions, 10118 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:48,100 INFO L231 Difference]: Finished difference. Result has 296 places, 494 transitions, 9125 flow [2024-06-14 12:58:48,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8996, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9125, PETRI_PLACES=296, PETRI_TRANSITIONS=494} [2024-06-14 12:58:48,101 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-14 12:58:48,101 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 494 transitions, 9125 flow [2024-06-14 12:58:48,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:58:48,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:48,101 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 12:58:48,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:58:48,101 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 12:58:48,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:48,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1519163708, now seen corresponding path program 4 times [2024-06-14 12:58:48,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:48,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715657532] [2024-06-14 12:58:48,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:48,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:51,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:51,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:51,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715657532] [2024-06-14 12:58:51,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715657532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:51,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:51,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:51,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493206705] [2024-06-14 12:58:51,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:51,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:51,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:51,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:51,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:51,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:58:51,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 494 transitions, 9125 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:58:51,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:51,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:58:51,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:54,911 INFO L124 PetriNetUnfolderBase]: 6531/10257 cut-off events. [2024-06-14 12:58:54,911 INFO L125 PetriNetUnfolderBase]: For 938949/938955 co-relation queries the response was YES. [2024-06-14 12:58:54,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86531 conditions, 10257 events. 6531/10257 cut-off events. For 938949/938955 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 65354 event pairs, 2374 based on Foata normal form. 5/10261 useless extension candidates. Maximal degree in co-relation 86392. Up to 9714 conditions per place. [2024-06-14 12:58:55,025 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 472 selfloop transitions, 47 changer transitions 0/523 dead transitions. [2024-06-14 12:58:55,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 523 transitions, 10299 flow [2024-06-14 12:58:55,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:55,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:58:55,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 12:58:55,026 INFO L175 Difference]: Start difference. First operand has 296 places, 494 transitions, 9125 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:58:55,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 523 transitions, 10299 flow [2024-06-14 12:58:56,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 523 transitions, 10186 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:58:56,703 INFO L231 Difference]: Finished difference. Result has 298 places, 496 transitions, 9159 flow [2024-06-14 12:58:56,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9012, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9159, PETRI_PLACES=298, PETRI_TRANSITIONS=496} [2024-06-14 12:58:56,704 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-14 12:58:56,704 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 496 transitions, 9159 flow [2024-06-14 12:58:56,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:58:56,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:56,704 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 12:58:56,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:58:56,704 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 12:58:56,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:56,704 INFO L85 PathProgramCache]: Analyzing trace with hash -514806307, now seen corresponding path program 1 times [2024-06-14 12:58:56,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:56,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500101158] [2024-06-14 12:58:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:56,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:00,573 INFO 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 12:59:00,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:00,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500101158] [2024-06-14 12:59:00,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500101158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:00,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:00,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:59:00,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766385459] [2024-06-14 12:59:00,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:00,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:59:00,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:00,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:59:00,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:59:00,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:59:00,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 496 transitions, 9159 flow. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:00,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:00,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:59:00,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:05,939 INFO L124 PetriNetUnfolderBase]: 8495/13355 cut-off events. [2024-06-14 12:59:05,939 INFO L125 PetriNetUnfolderBase]: For 1481773/1481791 co-relation queries the response was YES. [2024-06-14 12:59:06,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112623 conditions, 13355 events. 8495/13355 cut-off events. For 1481773/1481791 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 89296 event pairs, 2711 based on Foata normal form. 113/13465 useless extension candidates. Maximal degree in co-relation 112483. Up to 9477 conditions per place. [2024-06-14 12:59:06,109 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 499 selfloop transitions, 239 changer transitions 21/763 dead transitions. [2024-06-14 12:59:06,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 763 transitions, 15686 flow [2024-06-14 12:59:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 12:59:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 12:59:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 258 transitions. [2024-06-14 12:59:06,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:59:06,110 INFO L175 Difference]: Start difference. First operand has 298 places, 496 transitions, 9159 flow. Second operand 14 states and 258 transitions. [2024-06-14 12:59:06,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 763 transitions, 15686 flow [2024-06-14 12:59:09,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 763 transitions, 15553 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:59:09,074 INFO L231 Difference]: Finished difference. Result has 314 places, 638 transitions, 13277 flow [2024-06-14 12:59:09,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9028, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13277, PETRI_PLACES=314, PETRI_TRANSITIONS=638} [2024-06-14 12:59:09,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-14 12:59:09,074 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 638 transitions, 13277 flow [2024-06-14 12:59:09,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:59:09,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:09,075 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 12:59:09,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:59:09,075 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 12:59:09,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:09,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1820410171, now seen corresponding path program 2 times [2024-06-14 12:59:09,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:09,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259254852] [2024-06-14 12:59:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:09,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:12,517 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 12:59:12,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:12,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259254852] [2024-06-14 12:59:12,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259254852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:12,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:12,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:12,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568884506] [2024-06-14 12:59:12,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:12,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:12,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:12,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:12,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:12,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:59:12,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 638 transitions, 13277 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:59:12,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:12,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:59:12,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:18,456 INFO L124 PetriNetUnfolderBase]: 9994/15745 cut-off events. [2024-06-14 12:59:18,456 INFO L125 PetriNetUnfolderBase]: For 1939401/1939413 co-relation queries the response was YES. [2024-06-14 12:59:18,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141056 conditions, 15745 events. 9994/15745 cut-off events. For 1939401/1939413 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 108824 event pairs, 2902 based on Foata normal form. 110/15853 useless extension candidates. Maximal degree in co-relation 140907. Up to 7930 conditions per place. [2024-06-14 12:59:18,665 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 375 selfloop transitions, 472 changer transitions 24/875 dead transitions. [2024-06-14 12:59:18,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 875 transitions, 19213 flow [2024-06-14 12:59:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:59:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:59:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-14 12:59:18,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-14 12:59:18,666 INFO L175 Difference]: Start difference. First operand has 314 places, 638 transitions, 13277 flow. Second operand 10 states and 220 transitions. [2024-06-14 12:59:18,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 875 transitions, 19213 flow [2024-06-14 12:59:23,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 875 transitions, 19172 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 12:59:23,655 INFO L231 Difference]: Finished difference. Result has 326 places, 740 transitions, 16671 flow [2024-06-14 12:59:23,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=13241, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16671, PETRI_PLACES=326, PETRI_TRANSITIONS=740} [2024-06-14 12:59:23,656 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-14 12:59:23,656 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 740 transitions, 16671 flow [2024-06-14 12:59:23,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:59:23,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:23,657 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 12:59:23,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:59:23,657 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 12:59:23,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash -547247265, now seen corresponding path program 3 times [2024-06-14 12:59:23,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:23,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728309122] [2024-06-14 12:59:23,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:23,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:27,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:27,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728309122] [2024-06-14 12:59:27,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728309122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:27,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:27,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:27,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046079175] [2024-06-14 12:59:27,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:27,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:27,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:27,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:27,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:27,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:59:27,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 740 transitions, 16671 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:59:27,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:27,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:59:27,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:34,801 INFO L124 PetriNetUnfolderBase]: 11935/18817 cut-off events. [2024-06-14 12:59:34,801 INFO L125 PetriNetUnfolderBase]: For 2633255/2633265 co-relation queries the response was YES. [2024-06-14 12:59:35,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180943 conditions, 18817 events. 11935/18817 cut-off events. For 2633255/2633265 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 134195 event pairs, 3808 based on Foata normal form. 108/18923 useless extension candidates. Maximal degree in co-relation 180788. Up to 10210 conditions per place. [2024-06-14 12:59:35,076 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 459 selfloop transitions, 488 changer transitions 30/981 dead transitions. [2024-06-14 12:59:35,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 981 transitions, 22890 flow [2024-06-14 12:59:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:59:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:59:35,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 12:59:35,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093023255813953 [2024-06-14 12:59:35,078 INFO L175 Difference]: Start difference. First operand has 326 places, 740 transitions, 16671 flow. Second operand 10 states and 219 transitions. [2024-06-14 12:59:35,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 981 transitions, 22890 flow [2024-06-14 12:59:42,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 981 transitions, 22343 flow, removed 88 selfloop flow, removed 2 redundant places. [2024-06-14 12:59:42,775 INFO L231 Difference]: Finished difference. Result has 339 places, 830 transitions, 19488 flow [2024-06-14 12:59:42,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=16258, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19488, PETRI_PLACES=339, PETRI_TRANSITIONS=830} [2024-06-14 12:59:42,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-14 12:59:42,776 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 830 transitions, 19488 flow [2024-06-14 12:59:42,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:59:42,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:42,776 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 12:59:42,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:59:42,776 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 12:59:42,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash -503387099, now seen corresponding path program 4 times [2024-06-14 12:59:42,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:42,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904886258] [2024-06-14 12:59:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:42,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:46,253 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 12:59:46,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:46,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904886258] [2024-06-14 12:59:46,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904886258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:46,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:46,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:46,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49322178] [2024-06-14 12:59:46,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:46,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:46,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:46,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:46,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:46,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:59:46,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 830 transitions, 19488 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 12:59:46,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:46,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:59:46,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:53,772 INFO L124 PetriNetUnfolderBase]: 11745/18544 cut-off events. [2024-06-14 12:59:53,772 INFO L125 PetriNetUnfolderBase]: For 2716561/2716579 co-relation queries the response was YES. [2024-06-14 12:59:54,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181484 conditions, 18544 events. 11745/18544 cut-off events. For 2716561/2716579 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 132240 event pairs, 4162 based on Foata normal form. 138/18681 useless extension candidates. Maximal degree in co-relation 181322. Up to 15144 conditions per place. [2024-06-14 12:59:54,081 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 719 selfloop transitions, 166 changer transitions 12/901 dead transitions. [2024-06-14 12:59:54,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 901 transitions, 21955 flow [2024-06-14 12:59:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:59:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:59:54,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-06-14 12:59:54,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164904862579281 [2024-06-14 12:59:54,082 INFO L175 Difference]: Start difference. First operand has 339 places, 830 transitions, 19488 flow. Second operand 11 states and 197 transitions. [2024-06-14 12:59:54,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 901 transitions, 21955 flow [2024-06-14 13:00:00,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 901 transitions, 21564 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:00,670 INFO L231 Difference]: Finished difference. Result has 350 places, 838 transitions, 19633 flow [2024-06-14 13:00:00,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19103, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19633, PETRI_PLACES=350, PETRI_TRANSITIONS=838} [2024-06-14 13:00:00,671 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-14 13:00:00,671 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 838 transitions, 19633 flow [2024-06-14 13:00:00,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 13:00:00,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:00,671 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 13:00:00,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:00:00,672 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 13:00:00,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash 552726501, now seen corresponding path program 5 times [2024-06-14 13:00:00,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:00,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492864048] [2024-06-14 13:00:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:00,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:04,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:04,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492864048] [2024-06-14 13:00:04,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492864048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:04,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:04,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:00:04,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834641374] [2024-06-14 13:00:04,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:04,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:00:04,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:04,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:00:04,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:00:04,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 13:00:04,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 838 transitions, 19633 flow. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 13:00:04,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:04,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 13:00:04,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:11,571 INFO L124 PetriNetUnfolderBase]: 11254/17863 cut-off events. [2024-06-14 13:00:11,571 INFO L125 PetriNetUnfolderBase]: For 2763423/2763433 co-relation queries the response was YES. [2024-06-14 13:00:11,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166075 conditions, 17863 events. 11254/17863 cut-off events. For 2763423/2763433 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 127430 event pairs, 3458 based on Foata normal form. 298/18159 useless extension candidates. Maximal degree in co-relation 165909. Up to 12390 conditions per place. [2024-06-14 13:00:11,828 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 386 selfloop transitions, 524 changer transitions 20/934 dead transitions. [2024-06-14 13:00:11,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 934 transitions, 22991 flow [2024-06-14 13:00:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:00:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:00:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 13:00:11,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-06-14 13:00:11,830 INFO L175 Difference]: Start difference. First operand has 350 places, 838 transitions, 19633 flow. Second operand 10 states and 198 transitions. [2024-06-14 13:00:11,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 934 transitions, 22991 flow [2024-06-14 13:00:17,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 934 transitions, 22713 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 13:00:17,884 INFO L231 Difference]: Finished difference. Result has 359 places, 834 transitions, 20346 flow [2024-06-14 13:00:17,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=19361, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20346, PETRI_PLACES=359, PETRI_TRANSITIONS=834} [2024-06-14 13:00:17,884 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-14 13:00:17,885 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 834 transitions, 20346 flow [2024-06-14 13:00:17,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 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 13:00:17,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:17,885 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 13:00:17,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:00:17,885 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 13:00:17,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:17,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1296617563, now seen corresponding path program 6 times [2024-06-14 13:00:17,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:17,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49157866] [2024-06-14 13:00:17,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:17,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat