./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_rmo.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/safe019_rmo.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/safe019_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe019_rmo.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 13:21:46,219 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:21:46,281 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:21:46,287 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:21:46,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:21:46,311 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:21:46,311 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:21:46,311 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:21:46,312 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:21:46,315 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:21:46,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:21:46,316 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:21:46,316 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:21:46,317 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:21:46,318 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:21:46,318 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:21:46,318 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:21:46,318 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:21:46,318 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:21:46,319 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:21:46,320 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:21:46,320 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:21:46,320 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:21:46,320 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:21:46,321 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:21:46,321 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:21:46,321 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:21:46,321 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:21:46,322 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:21:46,322 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:21:46,323 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:21:46,323 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:21:46,323 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:21:46,323 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:21:46,323 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:21:46,323 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:21:46,324 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:21:46,324 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:21:46,324 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:21:46,324 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:21:46,324 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:21:46,324 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:21:46,325 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:21:46,325 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:21:46,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:21:46,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:21:46,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:21:46,570 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:21:46,570 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:21:46,571 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_rmo.oepc.i [2024-06-14 13:21:47,608 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:21:47,831 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:21:47,831 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_rmo.oepc.i [2024-06-14 13:21:47,843 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db12cdce1/028399872c924dff93438a499143f14a/FLAGd9c18d56c [2024-06-14 13:21:47,853 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db12cdce1/028399872c924dff93438a499143f14a [2024-06-14 13:21:47,855 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:21:47,856 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:21:47,856 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe019_rmo.oepc.yml/witness.yml [2024-06-14 13:21:48,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:21:48,080 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:21:48,081 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:21:48,081 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:21:48,085 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:21:48,085 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:21:47" (1/2) ... [2024-06-14 13:21:48,086 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47adeef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:21:48, skipping insertion in model container [2024-06-14 13:21:48,086 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:21:47" (1/2) ... [2024-06-14 13:21:48,087 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@292659ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:21:48, skipping insertion in model container [2024-06-14 13:21:48,088 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:21:48" (2/2) ... [2024-06-14 13:21:48,088 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47adeef9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:21:48, skipping insertion in model container [2024-06-14 13:21:48,088 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:21:48" (2/2) ... [2024-06-14 13:21:48,088 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:21:48,265 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:21:48,266 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! 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 || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! 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$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_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 || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 13:21:48,266 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$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$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 13:21:48,266 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! 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 || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! 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$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_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 || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 13:21:48,266 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$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$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 13:21:48,267 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:21:48,267 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-14 13:21:48,319 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:21:48,655 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:21:48,663 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:21:48,788 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:21:48,814 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:21:48,814 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:21:48 WrapperNode [2024-06-14 13:21:48,815 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:21:48,815 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:21:48,815 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:21:48,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:21:48,820 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 01:21:48" (1/1) ... [2024-06-14 13:21:48,840 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 01:21:48" (1/1) ... [2024-06-14 13:21:48,879 INFO L138 Inliner]: procedures = 176, calls = 118, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 328 [2024-06-14 13:21:48,887 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:21:48,888 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:21:48,889 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:21:48,889 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:21:48,898 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 01:21:48" (1/1) ... [2024-06-14 13:21:48,898 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 01:21:48" (1/1) ... [2024-06-14 13:21:48,912 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 01:21:48" (1/1) ... [2024-06-14 13:21:48,936 INFO L175 MemorySlicer]: Split 72 memory accesses to 2 slices as follows [2, 70]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-14 13:21:48,942 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 01:21:48" (1/1) ... [2024-06-14 13:21:48,942 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 01:21:48" (1/1) ... [2024-06-14 13:21:48,962 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 01:21:48" (1/1) ... [2024-06-14 13:21:48,967 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 01:21:48" (1/1) ... [2024-06-14 13:21:48,979 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 01:21:48" (1/1) ... [2024-06-14 13:21:48,981 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 01:21:48" (1/1) ... [2024-06-14 13:21:48,984 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:21:48,985 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:21:48,992 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:21:48,992 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:21:48,993 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 01:21:48" (1/1) ... [2024-06-14 13:21:48,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:21:49,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:21:49,042 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 13:21:49,045 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 13:21:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:21:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:21:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:21:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:21:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:21:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:21:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:21:49,072 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:21:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:21:49,073 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:21:49,073 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:21:49,073 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:21:49,073 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 13:21:49,074 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 13:21:49,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:21:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:21:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:21:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:21:49,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:21:49,078 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 13:21:49,233 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:21:49,237 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:21:49,831 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:21:49,832 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:21:50,353 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:21:50,353 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:21:50,354 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:21:50 BoogieIcfgContainer [2024-06-14 13:21:50,354 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:21:50,356 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:21:50,356 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:21:50,358 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:21:50,358 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:21:47" (1/4) ... [2024-06-14 13:21:50,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f92dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:21:50, skipping insertion in model container [2024-06-14 13:21:50,359 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:21:48" (2/4) ... [2024-06-14 13:21:50,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f92dbb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:21:50, skipping insertion in model container [2024-06-14 13:21:50,359 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 01:21:48" (3/4) ... [2024-06-14 13:21:50,359 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23f92dbb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:21:50, skipping insertion in model container [2024-06-14 13:21:50,360 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:21:50" (4/4) ... [2024-06-14 13:21:50,360 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_rmo.oepc.i [2024-06-14 13:21:50,373 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:21:50,374 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 13:21:50,374 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:21:50,423 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:21:50,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:21:50,472 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 13:21:50,472 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:21:50,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:21:50,474 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:21:50,476 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 13:21:50,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:21:50,486 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;@38a4ce89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:21:50,486 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 13:21:50,490 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:21:50,490 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:21:50,490 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:21:50,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:50,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:21:50,491 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:21:50,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:50,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1674312918, now seen corresponding path program 1 times [2024-06-14 13:21:50,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:50,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078840875] [2024-06-14 13:21:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:50,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:52,765 INFO 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 13:21:52,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:52,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078840875] [2024-06-14 13:21:52,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078840875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:52,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:52,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:21:52,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322996343] [2024-06-14 13:21:52,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:52,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:21:52,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:52,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:21:52,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:21:52,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 13:21:52,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:52,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:52,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 13:21:52,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:54,106 INFO L124 PetriNetUnfolderBase]: 4366/6139 cut-off events. [2024-06-14 13:21:54,106 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2024-06-14 13:21:54,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12412 conditions, 6139 events. 4366/6139 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32102 event pairs, 3068 based on Foata normal form. 1/6033 useless extension candidates. Maximal degree in co-relation 12396. Up to 6049 conditions per place. [2024-06-14 13:21:54,135 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 47 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-14 13:21:54,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 245 flow [2024-06-14 13:21:54,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:21:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:21:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-06-14 13:21:54,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5786163522012578 [2024-06-14 13:21:54,146 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 92 transitions. [2024-06-14 13:21:54,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 245 flow [2024-06-14 13:21:54,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 238 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:21:54,150 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 13:21:54,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-14 13:21:54,153 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 13:21:54,153 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 13:21:54,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:54,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:54,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:54,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:21:54,154 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:21:54,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:54,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1598056329, now seen corresponding path program 1 times [2024-06-14 13:21:54,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:54,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858408939] [2024-06-14 13:21:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:54,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:56,304 INFO 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 13:21:56,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:56,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858408939] [2024-06-14 13:21:56,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858408939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:56,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:56,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:21:56,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399109736] [2024-06-14 13:21:56,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:56,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:21:56,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:56,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:21:56,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:21:56,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 13:21:56,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:56,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:56,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 13:21:56,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:57,726 INFO L124 PetriNetUnfolderBase]: 4356/6126 cut-off events. [2024-06-14 13:21:57,727 INFO L125 PetriNetUnfolderBase]: For 1259/1269 co-relation queries the response was YES. [2024-06-14 13:21:57,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14297 conditions, 6126 events. 4356/6126 cut-off events. For 1259/1269 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 32087 event pairs, 2547 based on Foata normal form. 7/6128 useless extension candidates. Maximal degree in co-relation 14282. Up to 6008 conditions per place. [2024-06-14 13:21:57,758 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 60 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-06-14 13:21:57,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 77 transitions, 349 flow [2024-06-14 13:21:57,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:21:57,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:21:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-14 13:21:57,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707547169811321 [2024-06-14 13:21:57,762 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 121 transitions. [2024-06-14 13:21:57,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 77 transitions, 349 flow [2024-06-14 13:21:57,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:21:57,767 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-14 13:21:57,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-14 13:21:57,768 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-14 13:21:57,768 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-14 13:21:57,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:57,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:57,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:57,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:21:57,773 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:21:57,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:57,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2015245878, now seen corresponding path program 1 times [2024-06-14 13:21:57,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:57,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046471054] [2024-06-14 13:21:57,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:57,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:00,721 INFO 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 13:22:00,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:00,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046471054] [2024-06-14 13:22:00,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046471054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:00,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:00,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:22:00,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329797223] [2024-06-14 13:22:00,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:00,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:22:00,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:00,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:22:00,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:22:00,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:22:00,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:00,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:00,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:22:00,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:02,400 INFO L124 PetriNetUnfolderBase]: 5530/7707 cut-off events. [2024-06-14 13:22:02,400 INFO L125 PetriNetUnfolderBase]: For 4351/4370 co-relation queries the response was YES. [2024-06-14 13:22:02,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20110 conditions, 7707 events. 5530/7707 cut-off events. For 4351/4370 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 39772 event pairs, 2395 based on Foata normal form. 14/7716 useless extension candidates. Maximal degree in co-relation 20093. Up to 7514 conditions per place. [2024-06-14 13:22:02,511 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 83 selfloop transitions, 16 changer transitions 0/106 dead transitions. [2024-06-14 13:22:02,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 106 transitions, 534 flow [2024-06-14 13:22:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:22:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:22:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-14 13:22:02,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314465408805031 [2024-06-14 13:22:02,514 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 169 transitions. [2024-06-14 13:22:02,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 106 transitions, 534 flow [2024-06-14 13:22:02,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 106 transitions, 506 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 13:22:02,527 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-14 13:22:02,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-14 13:22:02,528 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-14 13:22:02,528 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-14 13:22:02,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:02,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:02,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:02,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:22:02,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:02,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:02,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1064388767, now seen corresponding path program 1 times [2024-06-14 13:22:02,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:02,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365380608] [2024-06-14 13:22:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:02,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:04,232 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 13:22:04,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:04,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365380608] [2024-06-14 13:22:04,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365380608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:04,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:04,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:22:04,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012052160] [2024-06-14 13:22:04,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:04,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:22:04,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:04,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:22:04,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:22:04,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:04,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:04,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:04,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:04,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:06,307 INFO L124 PetriNetUnfolderBase]: 6648/9211 cut-off events. [2024-06-14 13:22:06,307 INFO L125 PetriNetUnfolderBase]: For 9702/9702 co-relation queries the response was YES. [2024-06-14 13:22:06,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26382 conditions, 9211 events. 6648/9211 cut-off events. For 9702/9702 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47414 event pairs, 3316 based on Foata normal form. 3/9210 useless extension candidates. Maximal degree in co-relation 26363. Up to 9108 conditions per place. [2024-06-14 13:22:06,352 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 71 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-06-14 13:22:06,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 498 flow [2024-06-14 13:22:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:22:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:22:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 13:22:06,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490566037735849 [2024-06-14 13:22:06,354 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 119 transitions. [2024-06-14 13:22:06,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 498 flow [2024-06-14 13:22:06,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 87 transitions, 454 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:22:06,360 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 288 flow [2024-06-14 13:22:06,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-06-14 13:22:06,360 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-06-14 13:22:06,361 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 288 flow [2024-06-14 13:22:06,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:06,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:06,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:06,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:22:06,361 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:06,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1499499748, now seen corresponding path program 1 times [2024-06-14 13:22:06,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:06,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036398827] [2024-06-14 13:22:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:06,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:08,985 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 13:22:08,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:08,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036398827] [2024-06-14 13:22:08,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036398827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:08,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:08,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:22:08,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135261302] [2024-06-14 13:22:08,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:08,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:22:08,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:08,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:22:08,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:22:09,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:09,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 288 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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 13:22:09,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:09,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:09,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:11,243 INFO L124 PetriNetUnfolderBase]: 6675/9241 cut-off events. [2024-06-14 13:22:11,243 INFO L125 PetriNetUnfolderBase]: For 14074/14074 co-relation queries the response was YES. [2024-06-14 13:22:11,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28863 conditions, 9241 events. 6675/9241 cut-off events. For 14074/14074 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47540 event pairs, 3168 based on Foata normal form. 3/9237 useless extension candidates. Maximal degree in co-relation 28841. Up to 9077 conditions per place. [2024-06-14 13:22:11,305 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 88 selfloop transitions, 20 changer transitions 0/114 dead transitions. [2024-06-14 13:22:11,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 114 transitions, 679 flow [2024-06-14 13:22:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:22:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:22:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 13:22:11,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-14 13:22:11,308 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 288 flow. Second operand 6 states and 151 transitions. [2024-06-14 13:22:11,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 114 transitions, 679 flow [2024-06-14 13:22:11,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 114 transitions, 669 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-14 13:22:11,315 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 411 flow [2024-06-14 13:22:11,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2024-06-14 13:22:11,315 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-14 13:22:11,316 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 411 flow [2024-06-14 13:22:11,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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 13:22:11,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:11,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:11,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:22:11,316 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:11,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:11,317 INFO L85 PathProgramCache]: Analyzing trace with hash 355153058, now seen corresponding path program 2 times [2024-06-14 13:22:11,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:11,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847198515] [2024-06-14 13:22:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:11,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:13,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:13,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847198515] [2024-06-14 13:22:13,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847198515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:13,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:13,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:22:13,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573053230] [2024-06-14 13:22:13,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:13,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:22:13,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:13,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:22:13,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:22:13,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:13,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 411 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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 13:22:13,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:13,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:13,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:16,328 INFO L124 PetriNetUnfolderBase]: 6666/9239 cut-off events. [2024-06-14 13:22:16,328 INFO L125 PetriNetUnfolderBase]: For 20522/20537 co-relation queries the response was YES. [2024-06-14 13:22:16,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31513 conditions, 9239 events. 6666/9239 cut-off events. For 20522/20537 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47465 event pairs, 3175 based on Foata normal form. 13/9245 useless extension candidates. Maximal degree in co-relation 31487. Up to 9068 conditions per place. [2024-06-14 13:22:16,420 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 81 selfloop transitions, 21 changer transitions 0/108 dead transitions. [2024-06-14 13:22:16,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 108 transitions, 698 flow [2024-06-14 13:22:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:22:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:22:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:22:16,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:22:16,431 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 411 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:22:16,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 108 transitions, 698 flow [2024-06-14 13:22:16,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 108 transitions, 652 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 13:22:16,452 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 425 flow [2024-06-14 13:22:16,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=425, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-14 13:22:16,455 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-14 13:22:16,455 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 425 flow [2024-06-14 13:22:16,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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 13:22:16,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:16,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:16,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:22:16,456 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:16,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:16,457 INFO L85 PathProgramCache]: Analyzing trace with hash -675309696, now seen corresponding path program 1 times [2024-06-14 13:22:16,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:16,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066457137] [2024-06-14 13:22:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:16,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:18,408 INFO 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 13:22:18,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:18,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066457137] [2024-06-14 13:22:18,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066457137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:18,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:18,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:22:18,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630082305] [2024-06-14 13:22:18,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:18,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:22:18,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:18,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:22:18,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:22:18,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:18,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 425 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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 13:22:18,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:18,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:18,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:20,512 INFO L124 PetriNetUnfolderBase]: 6651/9215 cut-off events. [2024-06-14 13:22:20,512 INFO L125 PetriNetUnfolderBase]: For 23651/23651 co-relation queries the response was YES. [2024-06-14 13:22:20,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31804 conditions, 9215 events. 6651/9215 cut-off events. For 23651/23651 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47363 event pairs, 3011 based on Foata normal form. 6/9217 useless extension candidates. Maximal degree in co-relation 31777. Up to 9074 conditions per place. [2024-06-14 13:22:20,552 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 93 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2024-06-14 13:22:20,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 112 transitions, 737 flow [2024-06-14 13:22:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:22:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:22:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 13:22:20,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-06-14 13:22:20,554 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 425 flow. Second operand 6 states and 142 transitions. [2024-06-14 13:22:20,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 112 transitions, 737 flow [2024-06-14 13:22:20,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 704 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 13:22:20,569 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 456 flow [2024-06-14 13:22:20,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=456, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2024-06-14 13:22:20,570 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-14 13:22:20,570 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 456 flow [2024-06-14 13:22:20,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 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 13:22:20,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:20,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:20,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:22:20,571 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:20,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1388270436, now seen corresponding path program 1 times [2024-06-14 13:22:20,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:20,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251321930] [2024-06-14 13:22:20,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:20,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:23,290 INFO 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 13:22:23,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:23,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251321930] [2024-06-14 13:22:23,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251321930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:23,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:23,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:22:23,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775973368] [2024-06-14 13:22:23,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:23,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:22:23,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:23,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:22:23,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:22:23,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:23,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 456 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:23,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:23,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:23,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:25,536 INFO L124 PetriNetUnfolderBase]: 6697/9306 cut-off events. [2024-06-14 13:22:25,536 INFO L125 PetriNetUnfolderBase]: For 30764/30767 co-relation queries the response was YES. [2024-06-14 13:22:25,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33870 conditions, 9306 events. 6697/9306 cut-off events. For 30764/30767 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 48468 event pairs, 2838 based on Foata normal form. 7/9308 useless extension candidates. Maximal degree in co-relation 33841. Up to 9064 conditions per place. [2024-06-14 13:22:25,594 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 103 selfloop transitions, 25 changer transitions 0/134 dead transitions. [2024-06-14 13:22:25,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 134 transitions, 874 flow [2024-06-14 13:22:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 13:22:25,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-14 13:22:25,597 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 456 flow. Second operand 7 states and 177 transitions. [2024-06-14 13:22:25,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 134 transitions, 874 flow [2024-06-14 13:22:25,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 134 transitions, 836 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:22:25,623 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 528 flow [2024-06-14 13:22:25,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-14 13:22:25,626 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-14 13:22:25,626 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 528 flow [2024-06-14 13:22:25,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:25,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:25,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:25,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:22:25,626 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:25,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:25,627 INFO L85 PathProgramCache]: Analyzing trace with hash 362860648, now seen corresponding path program 2 times [2024-06-14 13:22:25,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:25,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737528000] [2024-06-14 13:22:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:25,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:28,281 INFO 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 13:22:28,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:28,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737528000] [2024-06-14 13:22:28,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737528000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:28,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:28,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:22:28,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084029302] [2024-06-14 13:22:28,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:28,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:22:28,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:28,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:22:28,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:22:28,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:28,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 528 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:28,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:28,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:28,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:30,591 INFO L124 PetriNetUnfolderBase]: 6724/9333 cut-off events. [2024-06-14 13:22:30,591 INFO L125 PetriNetUnfolderBase]: For 38967/38967 co-relation queries the response was YES. [2024-06-14 13:22:30,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36902 conditions, 9333 events. 6724/9333 cut-off events. For 38967/38967 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48058 event pairs, 2984 based on Foata normal form. 3/9329 useless extension candidates. Maximal degree in co-relation 36872. Up to 9059 conditions per place. [2024-06-14 13:22:30,640 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 106 selfloop transitions, 34 changer transitions 0/146 dead transitions. [2024-06-14 13:22:30,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 146 transitions, 1100 flow [2024-06-14 13:22:30,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 13:22:30,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-14 13:22:30,642 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 528 flow. Second operand 7 states and 176 transitions. [2024-06-14 13:22:30,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 146 transitions, 1100 flow [2024-06-14 13:22:30,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 146 transitions, 1002 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:30,663 INFO L231 Difference]: Finished difference. Result has 84 places, 99 transitions, 684 flow [2024-06-14 13:22:30,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=684, PETRI_PLACES=84, PETRI_TRANSITIONS=99} [2024-06-14 13:22:30,664 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 28 predicate places. [2024-06-14 13:22:30,664 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 99 transitions, 684 flow [2024-06-14 13:22:30,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:30,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:30,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:30,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:22:30,665 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:30,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:30,665 INFO L85 PathProgramCache]: Analyzing trace with hash 274966532, now seen corresponding path program 3 times [2024-06-14 13:22:30,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:30,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334470109] [2024-06-14 13:22:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:30,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:33,264 INFO 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 13:22:33,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:33,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334470109] [2024-06-14 13:22:33,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334470109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:33,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:33,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:22:33,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716648220] [2024-06-14 13:22:33,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:33,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:22:33,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:33,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:22:33,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:22:33,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:33,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 684 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:33,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:33,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:33,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:35,845 INFO L124 PetriNetUnfolderBase]: 6715/9324 cut-off events. [2024-06-14 13:22:35,845 INFO L125 PetriNetUnfolderBase]: For 50273/50273 co-relation queries the response was YES. [2024-06-14 13:22:35,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39397 conditions, 9324 events. 6715/9324 cut-off events. For 50273/50273 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48016 event pairs, 3001 based on Foata normal form. 3/9316 useless extension candidates. Maximal degree in co-relation 39364. Up to 9050 conditions per place. [2024-06-14 13:22:35,895 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 99 selfloop transitions, 35 changer transitions 0/140 dead transitions. [2024-06-14 13:22:35,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 140 transitions, 1061 flow [2024-06-14 13:22:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:22:35,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555256064690027 [2024-06-14 13:22:35,901 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 684 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:22:35,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 140 transitions, 1061 flow [2024-06-14 13:22:35,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 140 transitions, 997 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 13:22:35,928 INFO L231 Difference]: Finished difference. Result has 89 places, 100 transitions, 712 flow [2024-06-14 13:22:35,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=712, PETRI_PLACES=89, PETRI_TRANSITIONS=100} [2024-06-14 13:22:35,928 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 33 predicate places. [2024-06-14 13:22:35,928 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 100 transitions, 712 flow [2024-06-14 13:22:35,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:35,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:35,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:35,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:22:35,929 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:35,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:35,930 INFO L85 PathProgramCache]: Analyzing trace with hash -743294335, now seen corresponding path program 1 times [2024-06-14 13:22:35,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:35,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358073594] [2024-06-14 13:22:35,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:35,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:38,306 INFO 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 13:22:38,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:38,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358073594] [2024-06-14 13:22:38,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358073594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:38,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:38,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:22:38,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380808499] [2024-06-14 13:22:38,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:38,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:22:38,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:38,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:22:38,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:22:38,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:38,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 100 transitions, 712 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:38,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:38,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:38,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:40,764 INFO L124 PetriNetUnfolderBase]: 6861/9542 cut-off events. [2024-06-14 13:22:40,764 INFO L125 PetriNetUnfolderBase]: For 57471/57471 co-relation queries the response was YES. [2024-06-14 13:22:40,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41307 conditions, 9542 events. 6861/9542 cut-off events. For 57471/57471 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 49154 event pairs, 2984 based on Foata normal form. 6/9541 useless extension candidates. Maximal degree in co-relation 41272. Up to 9256 conditions per place. [2024-06-14 13:22:40,814 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 127 selfloop transitions, 42 changer transitions 0/175 dead transitions. [2024-06-14 13:22:40,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 175 transitions, 1396 flow [2024-06-14 13:22:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:22:40,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:22:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:22:40,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-14 13:22:40,816 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 712 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:22:40,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 175 transitions, 1396 flow [2024-06-14 13:22:40,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 175 transitions, 1310 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:22:40,860 INFO L231 Difference]: Finished difference. Result has 95 places, 122 transitions, 979 flow [2024-06-14 13:22:40,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=979, PETRI_PLACES=95, PETRI_TRANSITIONS=122} [2024-06-14 13:22:40,860 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-14 13:22:40,860 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 122 transitions, 979 flow [2024-06-14 13:22:40,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:40,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:40,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:40,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:22:40,861 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:40,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:40,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1636213537, now seen corresponding path program 2 times [2024-06-14 13:22:40,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:40,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759102129] [2024-06-14 13:22:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:40,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:43,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:43,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759102129] [2024-06-14 13:22:43,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759102129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:43,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:43,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:22:43,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946649108] [2024-06-14 13:22:43,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:43,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:22:43,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:43,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:22:43,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:22:43,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:43,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 122 transitions, 979 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:43,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:43,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:43,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:45,758 INFO L124 PetriNetUnfolderBase]: 6905/9606 cut-off events. [2024-06-14 13:22:45,758 INFO L125 PetriNetUnfolderBase]: For 69311/69311 co-relation queries the response was YES. [2024-06-14 13:22:45,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43747 conditions, 9606 events. 6905/9606 cut-off events. For 69311/69311 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 49648 event pairs, 2940 based on Foata normal form. 6/9605 useless extension candidates. Maximal degree in co-relation 43708. Up to 9274 conditions per place. [2024-06-14 13:22:45,818 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 122 selfloop transitions, 43 changer transitions 0/171 dead transitions. [2024-06-14 13:22:45,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 171 transitions, 1487 flow [2024-06-14 13:22:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:45,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:22:45,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-14 13:22:45,833 INFO L175 Difference]: Start difference. First operand has 95 places, 122 transitions, 979 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:22:45,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 171 transitions, 1487 flow [2024-06-14 13:22:45,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 171 transitions, 1415 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 13:22:45,887 INFO L231 Difference]: Finished difference. Result has 99 places, 125 transitions, 1054 flow [2024-06-14 13:22:45,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1054, PETRI_PLACES=99, PETRI_TRANSITIONS=125} [2024-06-14 13:22:45,888 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-14 13:22:45,888 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 125 transitions, 1054 flow [2024-06-14 13:22:45,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:45,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:45,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:45,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:22:45,889 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:45,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:45,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1464047099, now seen corresponding path program 3 times [2024-06-14 13:22:45,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:45,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626308922] [2024-06-14 13:22:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:45,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:48,382 INFO 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 13:22:48,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:48,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626308922] [2024-06-14 13:22:48,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626308922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:48,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:48,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:22:48,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449506990] [2024-06-14 13:22:48,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:48,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:22:48,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:48,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:22:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:22:48,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:48,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 125 transitions, 1054 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:48,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:48,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:48,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:50,863 INFO L124 PetriNetUnfolderBase]: 6949/9680 cut-off events. [2024-06-14 13:22:50,863 INFO L125 PetriNetUnfolderBase]: For 82119/82134 co-relation queries the response was YES. [2024-06-14 13:22:50,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45945 conditions, 9680 events. 6949/9680 cut-off events. For 82119/82134 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 50108 event pairs, 2959 based on Foata normal form. 16/9686 useless extension candidates. Maximal degree in co-relation 45905. Up to 9376 conditions per place. [2024-06-14 13:22:50,927 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 126 selfloop transitions, 40 changer transitions 0/172 dead transitions. [2024-06-14 13:22:50,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 172 transitions, 1570 flow [2024-06-14 13:22:50,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:50,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 13:22:50,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-06-14 13:22:50,929 INFO L175 Difference]: Start difference. First operand has 99 places, 125 transitions, 1054 flow. Second operand 7 states and 167 transitions. [2024-06-14 13:22:50,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 172 transitions, 1570 flow [2024-06-14 13:22:50,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 172 transitions, 1447 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:50,981 INFO L231 Difference]: Finished difference. Result has 101 places, 128 transitions, 1074 flow [2024-06-14 13:22:50,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1074, PETRI_PLACES=101, PETRI_TRANSITIONS=128} [2024-06-14 13:22:50,981 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-14 13:22:50,981 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 128 transitions, 1074 flow [2024-06-14 13:22:50,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:50,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:50,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:50,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:22:50,982 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:50,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:50,982 INFO L85 PathProgramCache]: Analyzing trace with hash -432485153, now seen corresponding path program 4 times [2024-06-14 13:22:50,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:50,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019163029] [2024-06-14 13:22:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:50,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:53,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:53,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019163029] [2024-06-14 13:22:53,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019163029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:53,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:53,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:22:53,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022514253] [2024-06-14 13:22:53,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:53,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:22:53,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:53,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:22:53,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:22:53,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:53,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 128 transitions, 1074 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:53,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:53,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:53,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:55,827 INFO L124 PetriNetUnfolderBase]: 6934/9659 cut-off events. [2024-06-14 13:22:55,828 INFO L125 PetriNetUnfolderBase]: For 81579/81594 co-relation queries the response was YES. [2024-06-14 13:22:55,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45632 conditions, 9659 events. 6934/9659 cut-off events. For 81579/81594 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 49869 event pairs, 2722 based on Foata normal form. 16/9665 useless extension candidates. Maximal degree in co-relation 45591. Up to 9185 conditions per place. [2024-06-14 13:22:55,885 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 118 selfloop transitions, 51 changer transitions 0/175 dead transitions. [2024-06-14 13:22:55,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 175 transitions, 1590 flow [2024-06-14 13:22:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:22:55,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:22:55,887 INFO L175 Difference]: Start difference. First operand has 101 places, 128 transitions, 1074 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:22:55,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 175 transitions, 1590 flow [2024-06-14 13:22:55,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 175 transitions, 1481 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:22:55,941 INFO L231 Difference]: Finished difference. Result has 103 places, 131 transitions, 1129 flow [2024-06-14 13:22:55,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1129, PETRI_PLACES=103, PETRI_TRANSITIONS=131} [2024-06-14 13:22:55,942 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-14 13:22:55,942 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 131 transitions, 1129 flow [2024-06-14 13:22:55,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:55,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:55,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:55,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:22:55,943 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:22:55,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:55,943 INFO L85 PathProgramCache]: Analyzing trace with hash 648337975, now seen corresponding path program 1 times [2024-06-14 13:22:55,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:55,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161943171] [2024-06-14 13:22:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:55,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:59,025 INFO 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 13:22:59,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:59,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161943171] [2024-06-14 13:22:59,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161943171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:59,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:59,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:59,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008855327] [2024-06-14 13:22:59,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:59,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:59,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:59,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:59,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:59,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:22:59,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 131 transitions, 1129 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:59,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:59,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:22:59,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:01,748 INFO L124 PetriNetUnfolderBase]: 7532/10543 cut-off events. [2024-06-14 13:23:01,748 INFO L125 PetriNetUnfolderBase]: For 107069/107072 co-relation queries the response was YES. [2024-06-14 13:23:01,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52176 conditions, 10543 events. 7532/10543 cut-off events. For 107069/107072 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 55908 event pairs, 2362 based on Foata normal form. 32/10570 useless extension candidates. Maximal degree in co-relation 52134. Up to 9547 conditions per place. [2024-06-14 13:23:01,816 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 168 selfloop transitions, 43 changer transitions 0/217 dead transitions. [2024-06-14 13:23:01,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 217 transitions, 1983 flow [2024-06-14 13:23:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-14 13:23:01,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863731656184486 [2024-06-14 13:23:01,819 INFO L175 Difference]: Start difference. First operand has 103 places, 131 transitions, 1129 flow. Second operand 9 states and 232 transitions. [2024-06-14 13:23:01,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 217 transitions, 1983 flow [2024-06-14 13:23:01,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 217 transitions, 1845 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:23:01,895 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1223 flow [2024-06-14 13:23:01,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1223, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2024-06-14 13:23:01,896 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-14 13:23:01,896 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1223 flow [2024-06-14 13:23:01,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:01,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:01,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:01,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:23:01,897 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:01,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:01,897 INFO L85 PathProgramCache]: Analyzing trace with hash 698718055, now seen corresponding path program 2 times [2024-06-14 13:23:01,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:01,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048124122] [2024-06-14 13:23:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:01,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:04,979 INFO 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 13:23:04,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:04,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048124122] [2024-06-14 13:23:04,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048124122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:04,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:04,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:04,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138998125] [2024-06-14 13:23:04,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:04,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:04,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:04,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:04,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:05,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:23:05,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 1223 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:05,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:05,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:23:05,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:07,796 INFO L124 PetriNetUnfolderBase]: 7434/10405 cut-off events. [2024-06-14 13:23:07,797 INFO L125 PetriNetUnfolderBase]: For 118470/118473 co-relation queries the response was YES. [2024-06-14 13:23:07,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52859 conditions, 10405 events. 7434/10405 cut-off events. For 118470/118473 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 55164 event pairs, 2842 based on Foata normal form. 42/10442 useless extension candidates. Maximal degree in co-relation 52815. Up to 9803 conditions per place. [2024-06-14 13:23:07,864 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 160 selfloop transitions, 37 changer transitions 0/203 dead transitions. [2024-06-14 13:23:07,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 203 transitions, 1832 flow [2024-06-14 13:23:07,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 13:23:07,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-14 13:23:07,866 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1223 flow. Second operand 8 states and 203 transitions. [2024-06-14 13:23:07,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 203 transitions, 1832 flow [2024-06-14 13:23:07,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 203 transitions, 1734 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:23:07,991 INFO L231 Difference]: Finished difference. Result has 111 places, 141 transitions, 1233 flow [2024-06-14 13:23:07,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1233, PETRI_PLACES=111, PETRI_TRANSITIONS=141} [2024-06-14 13:23:07,992 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-14 13:23:07,992 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 141 transitions, 1233 flow [2024-06-14 13:23:07,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:07,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:07,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:07,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:23:07,992 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:07,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:07,993 INFO L85 PathProgramCache]: Analyzing trace with hash 816805735, now seen corresponding path program 3 times [2024-06-14 13:23:07,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:07,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452151301] [2024-06-14 13:23:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:07,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:10,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:10,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452151301] [2024-06-14 13:23:10,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452151301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:10,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:10,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:10,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63484660] [2024-06-14 13:23:10,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:10,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:10,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:10,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:10,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:10,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:23:10,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 141 transitions, 1233 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:10,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:10,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:23:10,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:13,737 INFO L124 PetriNetUnfolderBase]: 7590/10653 cut-off events. [2024-06-14 13:23:13,737 INFO L125 PetriNetUnfolderBase]: For 126572/126572 co-relation queries the response was YES. [2024-06-14 13:23:13,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54345 conditions, 10653 events. 7590/10653 cut-off events. For 126572/126572 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 57104 event pairs, 2884 based on Foata normal form. 24/10670 useless extension candidates. Maximal degree in co-relation 54299. Up to 10059 conditions per place. [2024-06-14 13:23:13,805 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 145 selfloop transitions, 51 changer transitions 0/202 dead transitions. [2024-06-14 13:23:13,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 202 transitions, 1857 flow [2024-06-14 13:23:13,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:13,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 13:23:13,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669811320754717 [2024-06-14 13:23:13,807 INFO L175 Difference]: Start difference. First operand has 111 places, 141 transitions, 1233 flow. Second operand 8 states and 198 transitions. [2024-06-14 13:23:13,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 202 transitions, 1857 flow [2024-06-14 13:23:13,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 202 transitions, 1786 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:13,921 INFO L231 Difference]: Finished difference. Result has 113 places, 143 transitions, 1322 flow [2024-06-14 13:23:13,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1322, PETRI_PLACES=113, PETRI_TRANSITIONS=143} [2024-06-14 13:23:13,922 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-14 13:23:13,922 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 143 transitions, 1322 flow [2024-06-14 13:23:13,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:13,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:13,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:13,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:23:13,923 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:13,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:13,923 INFO L85 PathProgramCache]: Analyzing trace with hash 816990185, now seen corresponding path program 1 times [2024-06-14 13:23:13,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:13,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305103418] [2024-06-14 13:23:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:13,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:16,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:16,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305103418] [2024-06-14 13:23:16,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305103418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:16,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:16,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:16,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724038737] [2024-06-14 13:23:16,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:16,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:16,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:16,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:16,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:16,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:23:16,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 143 transitions, 1322 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:16,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:16,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:23:16,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:19,349 INFO L124 PetriNetUnfolderBase]: 7702/10825 cut-off events. [2024-06-14 13:23:19,350 INFO L125 PetriNetUnfolderBase]: For 145054/145054 co-relation queries the response was YES. [2024-06-14 13:23:19,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56631 conditions, 10825 events. 7702/10825 cut-off events. For 145054/145054 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 58005 event pairs, 2858 based on Foata normal form. 18/10836 useless extension candidates. Maximal degree in co-relation 56584. Up to 9791 conditions per place. [2024-06-14 13:23:19,421 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 144 selfloop transitions, 58 changer transitions 0/208 dead transitions. [2024-06-14 13:23:19,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 208 transitions, 1991 flow [2024-06-14 13:23:19,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:19,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 13:23:19,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-14 13:23:19,424 INFO L175 Difference]: Start difference. First operand has 113 places, 143 transitions, 1322 flow. Second operand 8 states and 200 transitions. [2024-06-14 13:23:19,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 208 transitions, 1991 flow [2024-06-14 13:23:19,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 208 transitions, 1869 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:19,552 INFO L231 Difference]: Finished difference. Result has 116 places, 146 transitions, 1414 flow [2024-06-14 13:23:19,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1414, PETRI_PLACES=116, PETRI_TRANSITIONS=146} [2024-06-14 13:23:19,553 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2024-06-14 13:23:19,553 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 146 transitions, 1414 flow [2024-06-14 13:23:19,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:19,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:19,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:19,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:23:19,554 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:19,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2045061117, now seen corresponding path program 4 times [2024-06-14 13:23:19,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:19,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256535805] [2024-06-14 13:23:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:19,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:22,369 INFO 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 13:23:22,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:22,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256535805] [2024-06-14 13:23:22,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256535805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:22,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:22,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:22,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709148112] [2024-06-14 13:23:22,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:22,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:22,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:22,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:22,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:22,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:23:22,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 146 transitions, 1414 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:22,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:22,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:23:22,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:25,270 INFO L124 PetriNetUnfolderBase]: 7799/10997 cut-off events. [2024-06-14 13:23:25,270 INFO L125 PetriNetUnfolderBase]: For 162989/162989 co-relation queries the response was YES. [2024-06-14 13:23:25,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58781 conditions, 10997 events. 7799/10997 cut-off events. For 162989/162989 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 59357 event pairs, 2945 based on Foata normal form. 24/11007 useless extension candidates. Maximal degree in co-relation 58732. Up to 10382 conditions per place. [2024-06-14 13:23:25,345 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 148 selfloop transitions, 50 changer transitions 0/204 dead transitions. [2024-06-14 13:23:25,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 204 transitions, 2046 flow [2024-06-14 13:23:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 13:23:25,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45754716981132076 [2024-06-14 13:23:25,349 INFO L175 Difference]: Start difference. First operand has 116 places, 146 transitions, 1414 flow. Second operand 8 states and 194 transitions. [2024-06-14 13:23:25,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 204 transitions, 2046 flow [2024-06-14 13:23:25,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 204 transitions, 1917 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:23:25,477 INFO L231 Difference]: Finished difference. Result has 119 places, 148 transitions, 1451 flow [2024-06-14 13:23:25,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1285, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1451, PETRI_PLACES=119, PETRI_TRANSITIONS=148} [2024-06-14 13:23:25,478 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-14 13:23:25,478 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 148 transitions, 1451 flow [2024-06-14 13:23:25,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:25,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:25,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:25,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:23:25,479 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:25,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:25,480 INFO L85 PathProgramCache]: Analyzing trace with hash 281175217, now seen corresponding path program 2 times [2024-06-14 13:23:25,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:25,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211740524] [2024-06-14 13:23:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:25,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:28,463 INFO 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 13:23:28,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:28,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211740524] [2024-06-14 13:23:28,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211740524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:28,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:28,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:28,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383896878] [2024-06-14 13:23:28,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:28,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:28,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:28,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:28,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:28,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:23:28,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 148 transitions, 1451 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:28,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:28,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:23:28,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:31,277 INFO L124 PetriNetUnfolderBase]: 7911/11189 cut-off events. [2024-06-14 13:23:31,278 INFO L125 PetriNetUnfolderBase]: For 178259/178259 co-relation queries the response was YES. [2024-06-14 13:23:31,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60727 conditions, 11189 events. 7911/11189 cut-off events. For 178259/178259 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 60914 event pairs, 2945 based on Foata normal form. 18/11193 useless extension candidates. Maximal degree in co-relation 60677. Up to 10364 conditions per place. [2024-06-14 13:23:31,351 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 151 selfloop transitions, 53 changer transitions 0/210 dead transitions. [2024-06-14 13:23:31,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 210 transitions, 2115 flow [2024-06-14 13:23:31,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:31,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:23:31,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-14 13:23:31,354 INFO L175 Difference]: Start difference. First operand has 119 places, 148 transitions, 1451 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:23:31,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 210 transitions, 2115 flow [2024-06-14 13:23:31,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 210 transitions, 1987 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:31,490 INFO L231 Difference]: Finished difference. Result has 121 places, 150 transitions, 1498 flow [2024-06-14 13:23:31,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1498, PETRI_PLACES=121, PETRI_TRANSITIONS=150} [2024-06-14 13:23:31,492 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-14 13:23:31,492 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 150 transitions, 1498 flow [2024-06-14 13:23:31,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:31,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:31,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:31,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:23:31,492 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:31,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:31,493 INFO L85 PathProgramCache]: Analyzing trace with hash -522135575, now seen corresponding path program 3 times [2024-06-14 13:23:31,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:31,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469672216] [2024-06-14 13:23:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:31,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:34,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:34,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469672216] [2024-06-14 13:23:34,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469672216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:34,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:34,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:34,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521412887] [2024-06-14 13:23:34,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:34,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:34,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:34,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:34,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:34,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:23:34,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 150 transitions, 1498 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:34,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:34,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:23:34,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:37,355 INFO L124 PetriNetUnfolderBase]: 7872/11132 cut-off events. [2024-06-14 13:23:37,355 INFO L125 PetriNetUnfolderBase]: For 191517/191517 co-relation queries the response was YES. [2024-06-14 13:23:37,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60947 conditions, 11132 events. 7872/11132 cut-off events. For 191517/191517 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 60298 event pairs, 2578 based on Foata normal form. 18/11136 useless extension candidates. Maximal degree in co-relation 60896. Up to 9445 conditions per place. [2024-06-14 13:23:37,436 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 135 selfloop transitions, 69 changer transitions 0/210 dead transitions. [2024-06-14 13:23:37,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 210 transitions, 2116 flow [2024-06-14 13:23:37,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:37,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:37,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:23:37,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 13:23:37,438 INFO L175 Difference]: Start difference. First operand has 121 places, 150 transitions, 1498 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:23:37,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 210 transitions, 2116 flow [2024-06-14 13:23:37,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 210 transitions, 1971 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:37,598 INFO L231 Difference]: Finished difference. Result has 122 places, 151 transitions, 1522 flow [2024-06-14 13:23:37,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1522, PETRI_PLACES=122, PETRI_TRANSITIONS=151} [2024-06-14 13:23:37,599 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-14 13:23:37,599 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 151 transitions, 1522 flow [2024-06-14 13:23:37,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:37,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:37,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:37,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:23:37,600 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:37,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:37,600 INFO L85 PathProgramCache]: Analyzing trace with hash 845839494, now seen corresponding path program 1 times [2024-06-14 13:23:37,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:37,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132623846] [2024-06-14 13:23:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:37,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:39,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:39,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132623846] [2024-06-14 13:23:39,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132623846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:39,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:39,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:23:39,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126808963] [2024-06-14 13:23:39,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:39,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:23:39,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:39,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:23:39,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:23:39,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:23:39,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 151 transitions, 1522 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:39,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:39,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:23:39,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:41,914 INFO L124 PetriNetUnfolderBase]: 7455/10689 cut-off events. [2024-06-14 13:23:41,914 INFO L125 PetriNetUnfolderBase]: For 194789/194792 co-relation queries the response was YES. [2024-06-14 13:23:41,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59099 conditions, 10689 events. 7455/10689 cut-off events. For 194789/194792 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 59732 event pairs, 2921 based on Foata normal form. 10/10657 useless extension candidates. Maximal degree in co-relation 59047. Up to 10164 conditions per place. [2024-06-14 13:23:41,988 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 149 selfloop transitions, 17 changer transitions 0/185 dead transitions. [2024-06-14 13:23:41,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 185 transitions, 2072 flow [2024-06-14 13:23:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:23:41,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:23:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 13:23:41,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47547169811320755 [2024-06-14 13:23:41,991 INFO L175 Difference]: Start difference. First operand has 122 places, 151 transitions, 1522 flow. Second operand 5 states and 126 transitions. [2024-06-14 13:23:41,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 185 transitions, 2072 flow [2024-06-14 13:23:42,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 185 transitions, 1891 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:42,162 INFO L231 Difference]: Finished difference. Result has 122 places, 161 transitions, 1498 flow [2024-06-14 13:23:42,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1498, PETRI_PLACES=122, PETRI_TRANSITIONS=161} [2024-06-14 13:23:42,162 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-14 13:23:42,162 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 161 transitions, 1498 flow [2024-06-14 13:23:42,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:42,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:42,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:42,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:23:42,163 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:42,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1115973016, now seen corresponding path program 1 times [2024-06-14 13:23:42,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:42,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735107215] [2024-06-14 13:23:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:42,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:43,967 INFO 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 13:23:43,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:43,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735107215] [2024-06-14 13:23:43,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735107215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:43,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:43,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:23:43,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250585379] [2024-06-14 13:23:43,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:43,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:23:43,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:43,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:23:43,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:23:43,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:23:43,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 161 transitions, 1498 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:43,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:43,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:23:43,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:46,535 INFO L124 PetriNetUnfolderBase]: 7917/11203 cut-off events. [2024-06-14 13:23:46,536 INFO L125 PetriNetUnfolderBase]: For 215316/215322 co-relation queries the response was YES. [2024-06-14 13:23:46,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64285 conditions, 11203 events. 7917/11203 cut-off events. For 215316/215322 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 61100 event pairs, 2930 based on Foata normal form. 6/11203 useless extension candidates. Maximal degree in co-relation 64231. Up to 10944 conditions per place. [2024-06-14 13:23:46,632 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 171 selfloop transitions, 21 changer transitions 0/198 dead transitions. [2024-06-14 13:23:46,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 198 transitions, 2192 flow [2024-06-14 13:23:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:23:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:23:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 13:23:46,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44025157232704404 [2024-06-14 13:23:46,634 INFO L175 Difference]: Start difference. First operand has 122 places, 161 transitions, 1498 flow. Second operand 6 states and 140 transitions. [2024-06-14 13:23:46,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 198 transitions, 2192 flow [2024-06-14 13:23:46,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 198 transitions, 2144 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-14 13:23:46,861 INFO L231 Difference]: Finished difference. Result has 127 places, 169 transitions, 1653 flow [2024-06-14 13:23:46,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1653, PETRI_PLACES=127, PETRI_TRANSITIONS=169} [2024-06-14 13:23:46,863 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-14 13:23:46,863 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 169 transitions, 1653 flow [2024-06-14 13:23:46,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:46,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:46,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:46,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:23:46,863 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:46,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:46,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1138493896, now seen corresponding path program 2 times [2024-06-14 13:23:46,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:46,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953244629] [2024-06-14 13:23:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:46,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:48,789 INFO 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 13:23:48,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:48,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953244629] [2024-06-14 13:23:48,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953244629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:48,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:48,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:23:48,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041639780] [2024-06-14 13:23:48,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:48,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:23:48,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:23:48,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:23:48,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:23:48,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 169 transitions, 1653 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:48,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:48,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:23:48,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:51,282 INFO L124 PetriNetUnfolderBase]: 7910/11194 cut-off events. [2024-06-14 13:23:51,282 INFO L125 PetriNetUnfolderBase]: For 237120/237126 co-relation queries the response was YES. [2024-06-14 13:23:51,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66438 conditions, 11194 events. 7910/11194 cut-off events. For 237120/237126 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 61154 event pairs, 2930 based on Foata normal form. 6/11194 useless extension candidates. Maximal degree in co-relation 66381. Up to 10948 conditions per place. [2024-06-14 13:23:51,370 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 168 selfloop transitions, 17 changer transitions 0/191 dead transitions. [2024-06-14 13:23:51,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 191 transitions, 2087 flow [2024-06-14 13:23:51,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:23:51,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:23:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 13:23:51,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490566037735849 [2024-06-14 13:23:51,371 INFO L175 Difference]: Start difference. First operand has 127 places, 169 transitions, 1653 flow. Second operand 5 states and 119 transitions. [2024-06-14 13:23:51,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 191 transitions, 2087 flow [2024-06-14 13:23:51,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 191 transitions, 1963 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-14 13:23:51,616 INFO L231 Difference]: Finished difference. Result has 130 places, 169 transitions, 1577 flow [2024-06-14 13:23:51,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1529, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1577, PETRI_PLACES=130, PETRI_TRANSITIONS=169} [2024-06-14 13:23:51,617 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-14 13:23:51,617 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 169 transitions, 1577 flow [2024-06-14 13:23:51,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:51,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:51,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:51,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:23:51,625 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:51,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:51,625 INFO L85 PathProgramCache]: Analyzing trace with hash 777855687, now seen corresponding path program 1 times [2024-06-14 13:23:51,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:51,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534981484] [2024-06-14 13:23:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:51,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:54,434 INFO 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 13:23:54,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:54,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534981484] [2024-06-14 13:23:54,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534981484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:54,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:54,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:23:54,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100900977] [2024-06-14 13:23:54,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:54,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:23:54,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:54,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:23:54,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:23:54,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:23:54,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 169 transitions, 1577 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:54,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:54,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:23:54,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:57,417 INFO L124 PetriNetUnfolderBase]: 7983/11396 cut-off events. [2024-06-14 13:23:57,417 INFO L125 PetriNetUnfolderBase]: For 263373/263403 co-relation queries the response was YES. [2024-06-14 13:23:57,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68240 conditions, 11396 events. 7983/11396 cut-off events. For 263373/263403 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 63647 event pairs, 2900 based on Foata normal form. 20/11336 useless extension candidates. Maximal degree in co-relation 68181. Up to 10501 conditions per place. [2024-06-14 13:23:57,511 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 179 selfloop transitions, 48 changer transitions 0/246 dead transitions. [2024-06-14 13:23:57,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 246 transitions, 2589 flow [2024-06-14 13:23:57,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 13:23:57,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549266247379455 [2024-06-14 13:23:57,514 INFO L175 Difference]: Start difference. First operand has 130 places, 169 transitions, 1577 flow. Second operand 9 states and 217 transitions. [2024-06-14 13:23:57,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 246 transitions, 2589 flow [2024-06-14 13:23:57,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 246 transitions, 2555 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:23:57,718 INFO L231 Difference]: Finished difference. Result has 137 places, 191 transitions, 1900 flow [2024-06-14 13:23:57,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1900, PETRI_PLACES=137, PETRI_TRANSITIONS=191} [2024-06-14 13:23:57,718 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-06-14 13:23:57,719 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 191 transitions, 1900 flow [2024-06-14 13:23:57,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:57,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:57,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:57,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:23:57,719 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:23:57,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:57,720 INFO L85 PathProgramCache]: Analyzing trace with hash 933389797, now seen corresponding path program 2 times [2024-06-14 13:23:57,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:57,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846115235] [2024-06-14 13:23:57,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:57,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:00,617 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 13:24:00,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:00,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846115235] [2024-06-14 13:24:00,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846115235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:00,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:00,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:00,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190964305] [2024-06-14 13:24:00,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:00,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:00,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:00,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:00,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:00,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:24:00,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 191 transitions, 1900 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:00,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:00,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:24:00,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:03,193 INFO L124 PetriNetUnfolderBase]: 8025/11454 cut-off events. [2024-06-14 13:24:03,193 INFO L125 PetriNetUnfolderBase]: For 290824/290854 co-relation queries the response was YES. [2024-06-14 13:24:03,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72497 conditions, 11454 events. 8025/11454 cut-off events. For 290824/290854 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 63935 event pairs, 2880 based on Foata normal form. 20/11394 useless extension candidates. Maximal degree in co-relation 72435. Up to 10545 conditions per place. [2024-06-14 13:24:03,289 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 167 selfloop transitions, 50 changer transitions 0/236 dead transitions. [2024-06-14 13:24:03,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 236 transitions, 2594 flow [2024-06-14 13:24:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:24:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:24:03,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:24:03,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-14 13:24:03,291 INFO L175 Difference]: Start difference. First operand has 137 places, 191 transitions, 1900 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:24:03,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 236 transitions, 2594 flow [2024-06-14 13:24:03,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 236 transitions, 2504 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-14 13:24:03,540 INFO L231 Difference]: Finished difference. Result has 143 places, 197 transitions, 2051 flow [2024-06-14 13:24:03,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2051, PETRI_PLACES=143, PETRI_TRANSITIONS=197} [2024-06-14 13:24:03,541 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-06-14 13:24:03,541 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 197 transitions, 2051 flow [2024-06-14 13:24:03,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:03,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:03,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:03,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:24:03,542 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:03,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:03,542 INFO L85 PathProgramCache]: Analyzing trace with hash 933775747, now seen corresponding path program 3 times [2024-06-14 13:24:03,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:03,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881829412] [2024-06-14 13:24:03,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:03,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:06,202 INFO 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 13:24:06,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:06,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881829412] [2024-06-14 13:24:06,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881829412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:06,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:06,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:06,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188058505] [2024-06-14 13:24:06,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:06,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:06,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:06,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:06,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:06,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:24:06,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 197 transitions, 2051 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:06,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:06,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:24:06,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:09,007 INFO L124 PetriNetUnfolderBase]: 8116/11592 cut-off events. [2024-06-14 13:24:09,007 INFO L125 PetriNetUnfolderBase]: For 308947/309021 co-relation queries the response was YES. [2024-06-14 13:24:09,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74681 conditions, 11592 events. 8116/11592 cut-off events. For 308947/309021 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 64875 event pairs, 2910 based on Foata normal form. 31/11535 useless extension candidates. Maximal degree in co-relation 74616. Up to 10367 conditions per place. [2024-06-14 13:24:09,113 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 164 selfloop transitions, 62 changer transitions 0/245 dead transitions. [2024-06-14 13:24:09,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 245 transitions, 2893 flow [2024-06-14 13:24:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:24:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:24:09,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 13:24:09,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-14 13:24:09,115 INFO L175 Difference]: Start difference. First operand has 143 places, 197 transitions, 2051 flow. Second operand 6 states and 152 transitions. [2024-06-14 13:24:09,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 245 transitions, 2893 flow [2024-06-14 13:24:09,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 245 transitions, 2766 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 13:24:09,423 INFO L231 Difference]: Finished difference. Result has 146 places, 211 transitions, 2281 flow [2024-06-14 13:24:09,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2281, PETRI_PLACES=146, PETRI_TRANSITIONS=211} [2024-06-14 13:24:09,423 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-06-14 13:24:09,423 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 211 transitions, 2281 flow [2024-06-14 13:24:09,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:09,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:09,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:09,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:24:09,424 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:09,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:09,424 INFO L85 PathProgramCache]: Analyzing trace with hash 955171719, now seen corresponding path program 1 times [2024-06-14 13:24:09,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:09,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984147541] [2024-06-14 13:24:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:09,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:11,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:11,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984147541] [2024-06-14 13:24:11,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984147541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:11,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:11,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:11,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116889891] [2024-06-14 13:24:11,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:11,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:11,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:11,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:11,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:11,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:24:11,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 211 transitions, 2281 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:11,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:11,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:24:11,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:14,949 INFO L124 PetriNetUnfolderBase]: 8852/12465 cut-off events. [2024-06-14 13:24:14,950 INFO L125 PetriNetUnfolderBase]: For 317605/317605 co-relation queries the response was YES. [2024-06-14 13:24:15,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82030 conditions, 12465 events. 8852/12465 cut-off events. For 317605/317605 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 67833 event pairs, 2971 based on Foata normal form. 8/12465 useless extension candidates. Maximal degree in co-relation 81963. Up to 11852 conditions per place. [2024-06-14 13:24:15,060 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 230 selfloop transitions, 37 changer transitions 0/273 dead transitions. [2024-06-14 13:24:15,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 273 transitions, 3439 flow [2024-06-14 13:24:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:24:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:24:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 13:24:15,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-14 13:24:15,062 INFO L175 Difference]: Start difference. First operand has 146 places, 211 transitions, 2281 flow. Second operand 7 states and 176 transitions. [2024-06-14 13:24:15,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 273 transitions, 3439 flow [2024-06-14 13:24:15,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 273 transitions, 3341 flow, removed 48 selfloop flow, removed 1 redundant places. [2024-06-14 13:24:15,445 INFO L231 Difference]: Finished difference. Result has 154 places, 226 transitions, 2525 flow [2024-06-14 13:24:15,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2203, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2525, PETRI_PLACES=154, PETRI_TRANSITIONS=226} [2024-06-14 13:24:15,446 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-14 13:24:15,446 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 226 transitions, 2525 flow [2024-06-14 13:24:15,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:15,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:15,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:15,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:24:15,446 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:15,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:15,447 INFO L85 PathProgramCache]: Analyzing trace with hash 933781699, now seen corresponding path program 2 times [2024-06-14 13:24:15,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:15,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892062268] [2024-06-14 13:24:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:15,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:17,776 INFO 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 13:24:17,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:17,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892062268] [2024-06-14 13:24:17,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892062268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:17,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:17,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:17,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798314945] [2024-06-14 13:24:17,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:17,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:17,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:17,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:17,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:17,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:24:17,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 226 transitions, 2525 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:17,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:17,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:24:17,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:21,071 INFO L124 PetriNetUnfolderBase]: 8974/12634 cut-off events. [2024-06-14 13:24:21,072 INFO L125 PetriNetUnfolderBase]: For 341717/341723 co-relation queries the response was YES. [2024-06-14 13:24:21,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84185 conditions, 12634 events. 8974/12634 cut-off events. For 341717/341723 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 68676 event pairs, 2962 based on Foata normal form. 12/12640 useless extension candidates. Maximal degree in co-relation 84113. Up to 12048 conditions per place. [2024-06-14 13:24:21,189 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 244 selfloop transitions, 39 changer transitions 0/289 dead transitions. [2024-06-14 13:24:21,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 289 transitions, 3671 flow [2024-06-14 13:24:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:21,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:21,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:24:21,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-14 13:24:21,191 INFO L175 Difference]: Start difference. First operand has 154 places, 226 transitions, 2525 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:24:21,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 289 transitions, 3671 flow [2024-06-14 13:24:21,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 289 transitions, 3536 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-06-14 13:24:21,494 INFO L231 Difference]: Finished difference. Result has 161 places, 237 transitions, 2705 flow [2024-06-14 13:24:21,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2705, PETRI_PLACES=161, PETRI_TRANSITIONS=237} [2024-06-14 13:24:21,495 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 105 predicate places. [2024-06-14 13:24:21,495 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 237 transitions, 2705 flow [2024-06-14 13:24:21,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:21,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:21,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:21,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:24:21,495 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:21,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:21,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1463552981, now seen corresponding path program 3 times [2024-06-14 13:24:21,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:21,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558733819] [2024-06-14 13:24:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:21,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:23,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:23,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558733819] [2024-06-14 13:24:23,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558733819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:23,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:23,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:23,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145636195] [2024-06-14 13:24:23,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:23,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:23,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:23,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:23,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:23,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:24:23,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 237 transitions, 2705 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:23,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:23,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:24:23,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:26,722 INFO L124 PetriNetUnfolderBase]: 8956/12613 cut-off events. [2024-06-14 13:24:26,723 INFO L125 PetriNetUnfolderBase]: For 362239/362239 co-relation queries the response was YES. [2024-06-14 13:24:26,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85105 conditions, 12613 events. 8956/12613 cut-off events. For 362239/362239 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 68648 event pairs, 2986 based on Foata normal form. 8/12613 useless extension candidates. Maximal degree in co-relation 85030. Up to 12038 conditions per place. [2024-06-14 13:24:26,837 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 232 selfloop transitions, 35 changer transitions 0/273 dead transitions. [2024-06-14 13:24:26,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 273 transitions, 3473 flow [2024-06-14 13:24:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:24:26,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:24:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 13:24:26,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-14 13:24:26,840 INFO L175 Difference]: Start difference. First operand has 161 places, 237 transitions, 2705 flow. Second operand 6 states and 151 transitions. [2024-06-14 13:24:26,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 273 transitions, 3473 flow [2024-06-14 13:24:27,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 273 transitions, 3298 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-14 13:24:27,261 INFO L231 Difference]: Finished difference. Result has 163 places, 237 transitions, 2611 flow [2024-06-14 13:24:27,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2530, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2611, PETRI_PLACES=163, PETRI_TRANSITIONS=237} [2024-06-14 13:24:27,262 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 107 predicate places. [2024-06-14 13:24:27,262 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 237 transitions, 2611 flow [2024-06-14 13:24:27,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:27,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:27,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:27,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:24:27,263 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:27,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:27,263 INFO L85 PathProgramCache]: Analyzing trace with hash 933789635, now seen corresponding path program 1 times [2024-06-14 13:24:27,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:27,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873733775] [2024-06-14 13:24:27,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:27,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:30,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:30,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873733775] [2024-06-14 13:24:30,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873733775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:30,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:30,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:30,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020973315] [2024-06-14 13:24:30,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:30,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:30,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:30,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:30,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:30,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:24:30,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 237 transitions, 2611 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:30,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:30,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:24:30,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:33,701 INFO L124 PetriNetUnfolderBase]: 8400/12020 cut-off events. [2024-06-14 13:24:33,702 INFO L125 PetriNetUnfolderBase]: For 374157/374236 co-relation queries the response was YES. [2024-06-14 13:24:33,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81941 conditions, 12020 events. 8400/12020 cut-off events. For 374157/374236 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 67403 event pairs, 2913 based on Foata normal form. 18/11974 useless extension candidates. Maximal degree in co-relation 81864. Up to 11301 conditions per place. [2024-06-14 13:24:33,846 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 236 selfloop transitions, 20 changer transitions 0/275 dead transitions. [2024-06-14 13:24:33,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 275 transitions, 3385 flow [2024-06-14 13:24:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:24:33,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:24:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 13:24:33,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-14 13:24:33,848 INFO L175 Difference]: Start difference. First operand has 163 places, 237 transitions, 2611 flow. Second operand 6 states and 151 transitions. [2024-06-14 13:24:33,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 275 transitions, 3385 flow [2024-06-14 13:24:34,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 275 transitions, 3315 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:24:34,270 INFO L231 Difference]: Finished difference. Result has 164 places, 240 transitions, 2670 flow [2024-06-14 13:24:34,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2670, PETRI_PLACES=164, PETRI_TRANSITIONS=240} [2024-06-14 13:24:34,271 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 108 predicate places. [2024-06-14 13:24:34,271 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 240 transitions, 2670 flow [2024-06-14 13:24:34,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:34,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:34,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:34,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:24:34,272 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:34,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1661044091, now seen corresponding path program 1 times [2024-06-14 13:24:34,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:34,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280663938] [2024-06-14 13:24:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:34,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:37,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:37,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280663938] [2024-06-14 13:24:37,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280663938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:37,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:37,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:37,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390583042] [2024-06-14 13:24:37,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:37,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:37,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:37,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:37,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:37,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:24:37,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 240 transitions, 2670 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:37,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:37,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:24:37,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:40,586 INFO L124 PetriNetUnfolderBase]: 9085/12771 cut-off events. [2024-06-14 13:24:40,586 INFO L125 PetriNetUnfolderBase]: For 419882/419894 co-relation queries the response was YES. [2024-06-14 13:24:40,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88233 conditions, 12771 events. 9085/12771 cut-off events. For 419882/419894 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 69663 event pairs, 3070 based on Foata normal form. 10/12771 useless extension candidates. Maximal degree in co-relation 88155. Up to 12254 conditions per place. [2024-06-14 13:24:40,708 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 230 selfloop transitions, 61 changer transitions 0/297 dead transitions. [2024-06-14 13:24:40,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 297 transitions, 3904 flow [2024-06-14 13:24:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:24:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:24:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 13:24:40,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636118598382749 [2024-06-14 13:24:40,711 INFO L175 Difference]: Start difference. First operand has 164 places, 240 transitions, 2670 flow. Second operand 7 states and 172 transitions. [2024-06-14 13:24:40,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 297 transitions, 3904 flow [2024-06-14 13:24:41,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 297 transitions, 3809 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 13:24:41,160 INFO L231 Difference]: Finished difference. Result has 167 places, 252 transitions, 3004 flow [2024-06-14 13:24:41,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2575, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3004, PETRI_PLACES=167, PETRI_TRANSITIONS=252} [2024-06-14 13:24:41,160 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 111 predicate places. [2024-06-14 13:24:41,160 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 252 transitions, 3004 flow [2024-06-14 13:24:41,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:41,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:41,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:41,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:24:41,161 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:41,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1660924121, now seen corresponding path program 2 times [2024-06-14 13:24:41,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:41,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328450510] [2024-06-14 13:24:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:41,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:43,998 INFO 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 13:24:43,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:43,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328450510] [2024-06-14 13:24:43,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328450510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:43,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:43,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:43,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290291190] [2024-06-14 13:24:43,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:44,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:44,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:44,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:44,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:44,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:24:44,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 252 transitions, 3004 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:44,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:44,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:24:44,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:47,147 INFO L124 PetriNetUnfolderBase]: 9123/12848 cut-off events. [2024-06-14 13:24:47,147 INFO L125 PetriNetUnfolderBase]: For 452515/452518 co-relation queries the response was YES. [2024-06-14 13:24:47,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90734 conditions, 12848 events. 9123/12848 cut-off events. For 452515/452518 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70179 event pairs, 3069 based on Foata normal form. 4/12847 useless extension candidates. Maximal degree in co-relation 90655. Up to 12400 conditions per place. [2024-06-14 13:24:47,276 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 252 selfloop transitions, 41 changer transitions 0/299 dead transitions. [2024-06-14 13:24:47,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 299 transitions, 3851 flow [2024-06-14 13:24:47,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:24:47,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:24:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:24:47,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420485175202156 [2024-06-14 13:24:47,278 INFO L175 Difference]: Start difference. First operand has 167 places, 252 transitions, 3004 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:24:47,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 299 transitions, 3851 flow [2024-06-14 13:24:47,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 299 transitions, 3684 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-06-14 13:24:47,802 INFO L231 Difference]: Finished difference. Result has 172 places, 260 transitions, 3085 flow [2024-06-14 13:24:47,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2859, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3085, PETRI_PLACES=172, PETRI_TRANSITIONS=260} [2024-06-14 13:24:47,803 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-06-14 13:24:47,803 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 260 transitions, 3085 flow [2024-06-14 13:24:47,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:47,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:47,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:47,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:24:47,804 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:47,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:47,804 INFO L85 PathProgramCache]: Analyzing trace with hash 253398419, now seen corresponding path program 3 times [2024-06-14 13:24:47,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:47,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783276709] [2024-06-14 13:24:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:47,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:50,433 INFO 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 13:24:50,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:50,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783276709] [2024-06-14 13:24:50,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783276709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:50,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:50,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:50,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411707629] [2024-06-14 13:24:50,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:50,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:50,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:50,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:50,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:50,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:24:50,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 260 transitions, 3085 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:50,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:50,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:24:50,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:53,915 INFO L124 PetriNetUnfolderBase]: 9142/12866 cut-off events. [2024-06-14 13:24:53,915 INFO L125 PetriNetUnfolderBase]: For 472776/472827 co-relation queries the response was YES. [2024-06-14 13:24:53,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91054 conditions, 12866 events. 9142/12866 cut-off events. For 472776/472827 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 70321 event pairs, 3071 based on Foata normal form. 29/12882 useless extension candidates. Maximal degree in co-relation 90973. Up to 12319 conditions per place. [2024-06-14 13:24:54,041 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 233 selfloop transitions, 68 changer transitions 0/307 dead transitions. [2024-06-14 13:24:54,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 307 transitions, 4157 flow [2024-06-14 13:24:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:24:54,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:24:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:24:54,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:24:54,056 INFO L175 Difference]: Start difference. First operand has 172 places, 260 transitions, 3085 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:24:54,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 307 transitions, 4157 flow [2024-06-14 13:24:54,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 307 transitions, 4019 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 13:24:54,660 INFO L231 Difference]: Finished difference. Result has 174 places, 264 transitions, 3183 flow [2024-06-14 13:24:54,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2947, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3183, PETRI_PLACES=174, PETRI_TRANSITIONS=264} [2024-06-14 13:24:54,661 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 118 predicate places. [2024-06-14 13:24:54,661 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 264 transitions, 3183 flow [2024-06-14 13:24:54,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:54,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:54,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:54,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:24:54,661 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:54,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:54,662 INFO L85 PathProgramCache]: Analyzing trace with hash 253696949, now seen corresponding path program 4 times [2024-06-14 13:24:54,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:54,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59348342] [2024-06-14 13:24:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:54,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:57,493 INFO 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 13:24:57,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:57,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59348342] [2024-06-14 13:24:57,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59348342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:57,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:57,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:57,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659141228] [2024-06-14 13:24:57,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:57,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:57,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:57,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:24:57,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 264 transitions, 3183 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:57,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:57,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:24:57,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:00,837 INFO L124 PetriNetUnfolderBase]: 9161/12891 cut-off events. [2024-06-14 13:25:00,837 INFO L125 PetriNetUnfolderBase]: For 493832/493876 co-relation queries the response was YES. [2024-06-14 13:25:00,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92076 conditions, 12891 events. 9161/12891 cut-off events. For 493832/493876 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 70426 event pairs, 3071 based on Foata normal form. 25/12903 useless extension candidates. Maximal degree in co-relation 91994. Up to 12339 conditions per place. [2024-06-14 13:25:00,977 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 224 selfloop transitions, 74 changer transitions 0/304 dead transitions. [2024-06-14 13:25:00,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 304 transitions, 4113 flow [2024-06-14 13:25:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:25:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:25:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:25:00,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366576819407008 [2024-06-14 13:25:00,979 INFO L175 Difference]: Start difference. First operand has 174 places, 264 transitions, 3183 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:25:00,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 304 transitions, 4113 flow [2024-06-14 13:25:01,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 304 transitions, 3853 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 13:25:01,521 INFO L231 Difference]: Finished difference. Result has 175 places, 268 transitions, 3178 flow [2024-06-14 13:25:01,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2939, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3178, PETRI_PLACES=175, PETRI_TRANSITIONS=268} [2024-06-14 13:25:01,522 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 119 predicate places. [2024-06-14 13:25:01,522 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 268 transitions, 3178 flow [2024-06-14 13:25:01,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:01,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:01,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:01,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:25:01,523 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:01,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1123978457, now seen corresponding path program 5 times [2024-06-14 13:25:01,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:01,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862650085] [2024-06-14 13:25:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:01,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:04,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:04,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862650085] [2024-06-14 13:25:04,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862650085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:04,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:04,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:25:04,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877136893] [2024-06-14 13:25:04,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:04,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:25:04,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:04,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:25:04,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:25:04,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:25:04,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 268 transitions, 3178 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:04,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:04,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:25:04,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:07,822 INFO L124 PetriNetUnfolderBase]: 9154/12873 cut-off events. [2024-06-14 13:25:07,822 INFO L125 PetriNetUnfolderBase]: For 513099/513128 co-relation queries the response was YES. [2024-06-14 13:25:07,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92365 conditions, 12873 events. 9154/12873 cut-off events. For 513099/513128 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 70235 event pairs, 3094 based on Foata normal form. 15/12870 useless extension candidates. Maximal degree in co-relation 92283. Up to 12286 conditions per place. [2024-06-14 13:25:07,979 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 218 selfloop transitions, 80 changer transitions 0/304 dead transitions. [2024-06-14 13:25:07,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 304 transitions, 4020 flow [2024-06-14 13:25:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:25:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:25:07,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 13:25:07,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46855345911949686 [2024-06-14 13:25:07,981 INFO L175 Difference]: Start difference. First operand has 175 places, 268 transitions, 3178 flow. Second operand 6 states and 149 transitions. [2024-06-14 13:25:07,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 304 transitions, 4020 flow [2024-06-14 13:25:08,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 304 transitions, 3799 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-14 13:25:08,616 INFO L231 Difference]: Finished difference. Result has 177 places, 268 transitions, 3135 flow [2024-06-14 13:25:08,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3135, PETRI_PLACES=177, PETRI_TRANSITIONS=268} [2024-06-14 13:25:08,616 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 121 predicate places. [2024-06-14 13:25:08,616 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 268 transitions, 3135 flow [2024-06-14 13:25:08,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:08,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:08,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:08,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:25:08,617 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:08,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash -769519187, now seen corresponding path program 6 times [2024-06-14 13:25:08,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:08,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399372538] [2024-06-14 13:25:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:08,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:11,226 INFO 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 13:25:11,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:11,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399372538] [2024-06-14 13:25:11,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399372538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:11,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:11,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:25:11,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074495993] [2024-06-14 13:25:11,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:11,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:25:11,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:11,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:25:11,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:25:11,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:25:11,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 268 transitions, 3135 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:11,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:11,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:25:11,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:14,665 INFO L124 PetriNetUnfolderBase]: 9147/12868 cut-off events. [2024-06-14 13:25:14,665 INFO L125 PetriNetUnfolderBase]: For 533009/533012 co-relation queries the response was YES. [2024-06-14 13:25:14,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92860 conditions, 12868 events. 9147/12868 cut-off events. For 533009/533012 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 70201 event pairs, 3051 based on Foata normal form. 4/12867 useless extension candidates. Maximal degree in co-relation 92777. Up to 12279 conditions per place. [2024-06-14 13:25:14,817 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 236 selfloop transitions, 82 changer transitions 0/324 dead transitions. [2024-06-14 13:25:14,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 324 transitions, 3945 flow [2024-06-14 13:25:14,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:14,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:25:14,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-14 13:25:14,819 INFO L175 Difference]: Start difference. First operand has 177 places, 268 transitions, 3135 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:25:14,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 324 transitions, 3945 flow [2024-06-14 13:25:15,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 324 transitions, 3661 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 13:25:15,594 INFO L231 Difference]: Finished difference. Result has 178 places, 268 transitions, 3058 flow [2024-06-14 13:25:15,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2851, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3058, PETRI_PLACES=178, PETRI_TRANSITIONS=268} [2024-06-14 13:25:15,594 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 122 predicate places. [2024-06-14 13:25:15,595 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 268 transitions, 3058 flow [2024-06-14 13:25:15,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:15,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:15,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:15,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:25:15,595 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:15,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:15,596 INFO L85 PathProgramCache]: Analyzing trace with hash -457307771, now seen corresponding path program 1 times [2024-06-14 13:25:15,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:15,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334201607] [2024-06-14 13:25:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:15,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:17,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:17,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334201607] [2024-06-14 13:25:17,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334201607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:17,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:17,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:25:17,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484799151] [2024-06-14 13:25:17,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:17,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:25:17,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:17,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:25:17,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:25:18,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:25:18,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 268 transitions, 3058 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:18,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:18,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:25:18,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:21,109 INFO L124 PetriNetUnfolderBase]: 9179/12900 cut-off events. [2024-06-14 13:25:21,109 INFO L125 PetriNetUnfolderBase]: For 531612/531615 co-relation queries the response was YES. [2024-06-14 13:25:21,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93242 conditions, 12900 events. 9179/12900 cut-off events. For 531612/531615 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 70129 event pairs, 2892 based on Foata normal form. 6/12900 useless extension candidates. Maximal degree in co-relation 93159. Up to 12490 conditions per place. [2024-06-14 13:25:21,245 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 279 selfloop transitions, 29 changer transitions 0/314 dead transitions. [2024-06-14 13:25:21,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 314 transitions, 4102 flow [2024-06-14 13:25:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:25:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:25:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:25:21,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420485175202156 [2024-06-14 13:25:21,252 INFO L175 Difference]: Start difference. First operand has 178 places, 268 transitions, 3058 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:25:21,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 314 transitions, 4102 flow [2024-06-14 13:25:21,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 314 transitions, 3908 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 13:25:21,818 INFO L231 Difference]: Finished difference. Result has 177 places, 274 transitions, 3124 flow [2024-06-14 13:25:21,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3124, PETRI_PLACES=177, PETRI_TRANSITIONS=274} [2024-06-14 13:25:21,819 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 121 predicate places. [2024-06-14 13:25:21,819 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 274 transitions, 3124 flow [2024-06-14 13:25:21,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:21,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:21,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:21,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:25:21,826 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:21,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:21,826 INFO L85 PathProgramCache]: Analyzing trace with hash -454450811, now seen corresponding path program 2 times [2024-06-14 13:25:21,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:21,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029133093] [2024-06-14 13:25:21,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:21,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:24,211 INFO 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 13:25:24,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:24,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029133093] [2024-06-14 13:25:24,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029133093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:24,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:24,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:25:24,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366378270] [2024-06-14 13:25:24,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:24,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:25:24,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:24,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:25:24,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:25:24,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:25:24,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 274 transitions, 3124 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:24,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:24,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:25:24,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:27,601 INFO L124 PetriNetUnfolderBase]: 9211/12955 cut-off events. [2024-06-14 13:25:27,601 INFO L125 PetriNetUnfolderBase]: For 519254/519257 co-relation queries the response was YES. [2024-06-14 13:25:27,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93544 conditions, 12955 events. 9211/12955 cut-off events. For 519254/519257 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 70693 event pairs, 3042 based on Foata normal form. 6/12955 useless extension candidates. Maximal degree in co-relation 93461. Up to 12612 conditions per place. [2024-06-14 13:25:27,753 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 280 selfloop transitions, 24 changer transitions 0/310 dead transitions. [2024-06-14 13:25:27,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 310 transitions, 3922 flow [2024-06-14 13:25:27,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:25:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:25:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 13:25:27,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42318059299191374 [2024-06-14 13:25:27,755 INFO L175 Difference]: Start difference. First operand has 177 places, 274 transitions, 3124 flow. Second operand 7 states and 157 transitions. [2024-06-14 13:25:27,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 310 transitions, 3922 flow [2024-06-14 13:25:28,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 310 transitions, 3755 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-14 13:25:28,564 INFO L231 Difference]: Finished difference. Result has 181 places, 277 transitions, 3115 flow [2024-06-14 13:25:28,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3115, PETRI_PLACES=181, PETRI_TRANSITIONS=277} [2024-06-14 13:25:28,565 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 125 predicate places. [2024-06-14 13:25:28,565 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 277 transitions, 3115 flow [2024-06-14 13:25:28,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:28,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:28,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:28,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:25:28,566 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:28,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:28,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1123970521, now seen corresponding path program 3 times [2024-06-14 13:25:28,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:28,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387301172] [2024-06-14 13:25:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:28,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:30,889 INFO 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 13:25:30,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:30,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387301172] [2024-06-14 13:25:30,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387301172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:30,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:30,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:25:30,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402031087] [2024-06-14 13:25:30,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:30,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:25:30,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:30,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:25:30,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:25:30,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:25:30,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 277 transitions, 3115 flow. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:30,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:30,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:25:30,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:34,127 INFO L124 PetriNetUnfolderBase]: 9199/12928 cut-off events. [2024-06-14 13:25:34,128 INFO L125 PetriNetUnfolderBase]: For 537839/537842 co-relation queries the response was YES. [2024-06-14 13:25:34,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93541 conditions, 12928 events. 9199/12928 cut-off events. For 537839/537842 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 70384 event pairs, 2890 based on Foata normal form. 6/12928 useless extension candidates. Maximal degree in co-relation 93456. Up to 12569 conditions per place. [2024-06-14 13:25:34,273 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 280 selfloop transitions, 23 changer transitions 0/309 dead transitions. [2024-06-14 13:25:34,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 309 transitions, 3813 flow [2024-06-14 13:25:34,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:25:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:25:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 13:25:34,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2024-06-14 13:25:34,275 INFO L175 Difference]: Start difference. First operand has 181 places, 277 transitions, 3115 flow. Second operand 6 states and 143 transitions. [2024-06-14 13:25:34,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 309 transitions, 3813 flow [2024-06-14 13:25:35,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 309 transitions, 3665 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 13:25:35,204 INFO L231 Difference]: Finished difference. Result has 182 places, 277 transitions, 3025 flow [2024-06-14 13:25:35,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3025, PETRI_PLACES=182, PETRI_TRANSITIONS=277} [2024-06-14 13:25:35,205 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 126 predicate places. [2024-06-14 13:25:35,205 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 277 transitions, 3025 flow [2024-06-14 13:25:35,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:35,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:35,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:35,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:25:35,206 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:35,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:35,206 INFO L85 PathProgramCache]: Analyzing trace with hash -323911289, now seen corresponding path program 1 times [2024-06-14 13:25:35,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:35,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452689779] [2024-06-14 13:25:35,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:35,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:36,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:36,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452689779] [2024-06-14 13:25:36,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452689779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:36,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:36,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:25:36,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346844140] [2024-06-14 13:25:36,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:36,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:25:36,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:36,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:25:36,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:25:36,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 13:25:36,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 277 transitions, 3025 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:36,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:36,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 13:25:36,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:39,958 INFO L124 PetriNetUnfolderBase]: 8106/11743 cut-off events. [2024-06-14 13:25:39,959 INFO L125 PetriNetUnfolderBase]: For 557787/558277 co-relation queries the response was YES. [2024-06-14 13:25:40,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87090 conditions, 11743 events. 8106/11743 cut-off events. For 557787/558277 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 67850 event pairs, 2777 based on Foata normal form. 8/11557 useless extension candidates. Maximal degree in co-relation 87004. Up to 10782 conditions per place. [2024-06-14 13:25:40,073 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 223 selfloop transitions, 18 changer transitions 0/295 dead transitions. [2024-06-14 13:25:40,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 295 transitions, 3555 flow [2024-06-14 13:25:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:25:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:25:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-14 13:25:40,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-14 13:25:40,075 INFO L175 Difference]: Start difference. First operand has 182 places, 277 transitions, 3025 flow. Second operand 5 states and 123 transitions. [2024-06-14 13:25:40,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 295 transitions, 3555 flow [2024-06-14 13:25:40,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 295 transitions, 3489 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:25:40,712 INFO L231 Difference]: Finished difference. Result has 182 places, 277 transitions, 3005 flow [2024-06-14 13:25:40,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3005, PETRI_PLACES=182, PETRI_TRANSITIONS=277} [2024-06-14 13:25:40,713 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 126 predicate places. [2024-06-14 13:25:40,713 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 277 transitions, 3005 flow [2024-06-14 13:25:40,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:40,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:40,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:40,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:25:40,713 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:40,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:40,714 INFO L85 PathProgramCache]: Analyzing trace with hash 42504871, now seen corresponding path program 1 times [2024-06-14 13:25:40,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:40,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796068089] [2024-06-14 13:25:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:40,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:43,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:43,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796068089] [2024-06-14 13:25:43,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796068089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:43,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:43,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:43,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95498045] [2024-06-14 13:25:43,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:43,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:43,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:43,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:43,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:25:43,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 277 transitions, 3005 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:43,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:43,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:25:43,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:47,150 INFO L124 PetriNetUnfolderBase]: 9110/12825 cut-off events. [2024-06-14 13:25:47,150 INFO L125 PetriNetUnfolderBase]: For 561376/561379 co-relation queries the response was YES. [2024-06-14 13:25:47,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93755 conditions, 12825 events. 9110/12825 cut-off events. For 561376/561379 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 70121 event pairs, 2970 based on Foata normal form. 4/12824 useless extension candidates. Maximal degree in co-relation 93668. Up to 12355 conditions per place. [2024-06-14 13:25:47,296 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 280 selfloop transitions, 49 changer transitions 0/335 dead transitions. [2024-06-14 13:25:47,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 335 transitions, 3929 flow [2024-06-14 13:25:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:47,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 13:25:47,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45754716981132076 [2024-06-14 13:25:47,298 INFO L175 Difference]: Start difference. First operand has 182 places, 277 transitions, 3005 flow. Second operand 8 states and 194 transitions. [2024-06-14 13:25:47,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 335 transitions, 3929 flow [2024-06-14 13:25:48,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 335 transitions, 3883 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 13:25:48,172 INFO L231 Difference]: Finished difference. Result has 186 places, 281 transitions, 3178 flow [2024-06-14 13:25:48,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2959, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3178, PETRI_PLACES=186, PETRI_TRANSITIONS=281} [2024-06-14 13:25:48,173 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 130 predicate places. [2024-06-14 13:25:48,173 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 281 transitions, 3178 flow [2024-06-14 13:25:48,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:48,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:48,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:48,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:25:48,174 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:48,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:48,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1634702817, now seen corresponding path program 2 times [2024-06-14 13:25:48,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:48,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073954936] [2024-06-14 13:25:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:48,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:51,431 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 13:25:51,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:51,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073954936] [2024-06-14 13:25:51,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073954936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:51,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:51,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:51,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086015815] [2024-06-14 13:25:51,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:51,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:51,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:51,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:51,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:51,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:25:51,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 281 transitions, 3178 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:51,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:51,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:25:51,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:55,127 INFO L124 PetriNetUnfolderBase]: 9155/12873 cut-off events. [2024-06-14 13:25:55,128 INFO L125 PetriNetUnfolderBase]: For 599635/599647 co-relation queries the response was YES. [2024-06-14 13:25:55,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96921 conditions, 12873 events. 9155/12873 cut-off events. For 599635/599647 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 70331 event pairs, 2989 based on Foata normal form. 10/12873 useless extension candidates. Maximal degree in co-relation 96834. Up to 12087 conditions per place. [2024-06-14 13:25:55,278 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 235 selfloop transitions, 107 changer transitions 0/348 dead transitions. [2024-06-14 13:25:55,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 348 transitions, 4652 flow [2024-06-14 13:25:55,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 13:25:55,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669811320754717 [2024-06-14 13:25:55,280 INFO L175 Difference]: Start difference. First operand has 186 places, 281 transitions, 3178 flow. Second operand 8 states and 198 transitions. [2024-06-14 13:25:55,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 348 transitions, 4652 flow [2024-06-14 13:25:56,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 348 transitions, 4463 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 13:25:56,034 INFO L231 Difference]: Finished difference. Result has 188 places, 293 transitions, 3556 flow [2024-06-14 13:25:56,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2989, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3556, PETRI_PLACES=188, PETRI_TRANSITIONS=293} [2024-06-14 13:25:56,035 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 132 predicate places. [2024-06-14 13:25:56,035 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 293 transitions, 3556 flow [2024-06-14 13:25:56,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:56,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:56,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:56,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:25:56,036 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:56,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:56,036 INFO L85 PathProgramCache]: Analyzing trace with hash 47242291, now seen corresponding path program 3 times [2024-06-14 13:25:56,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:56,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76779060] [2024-06-14 13:25:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:56,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:59,242 INFO 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 13:25:59,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:59,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76779060] [2024-06-14 13:25:59,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76779060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:59,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:59,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:59,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243549333] [2024-06-14 13:25:59,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:59,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:59,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:59,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:59,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:59,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:25:59,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 293 transitions, 3556 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:59,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:59,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:25:59,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:02,997 INFO L124 PetriNetUnfolderBase]: 9174/12904 cut-off events. [2024-06-14 13:26:02,997 INFO L125 PetriNetUnfolderBase]: For 641111/641123 co-relation queries the response was YES. [2024-06-14 13:26:03,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99697 conditions, 12904 events. 9174/12904 cut-off events. For 641111/641123 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 70525 event pairs, 2989 based on Foata normal form. 10/12904 useless extension candidates. Maximal degree in co-relation 99609. Up to 12107 conditions per place. [2024-06-14 13:26:03,142 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 232 selfloop transitions, 110 changer transitions 0/348 dead transitions. [2024-06-14 13:26:03,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 348 transitions, 4810 flow [2024-06-14 13:26:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:03,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 13:26:03,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45754716981132076 [2024-06-14 13:26:03,145 INFO L175 Difference]: Start difference. First operand has 188 places, 293 transitions, 3556 flow. Second operand 8 states and 194 transitions. [2024-06-14 13:26:03,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 348 transitions, 4810 flow [2024-06-14 13:26:04,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 348 transitions, 4554 flow, removed 97 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:04,219 INFO L231 Difference]: Finished difference. Result has 193 places, 297 transitions, 3649 flow [2024-06-14 13:26:04,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3649, PETRI_PLACES=193, PETRI_TRANSITIONS=297} [2024-06-14 13:26:04,220 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 137 predicate places. [2024-06-14 13:26:04,220 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 297 transitions, 3649 flow [2024-06-14 13:26:04,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:04,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:04,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:04,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:26:04,221 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:04,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash 47242632, now seen corresponding path program 1 times [2024-06-14 13:26:04,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:04,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434337150] [2024-06-14 13:26:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:04,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:07,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:07,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434337150] [2024-06-14 13:26:07,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434337150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:07,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:07,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:07,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469951101] [2024-06-14 13:26:07,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:07,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:07,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:07,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:07,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:07,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:26:07,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 297 transitions, 3649 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:07,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:07,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:26:07,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:11,450 INFO L124 PetriNetUnfolderBase]: 9598/13450 cut-off events. [2024-06-14 13:26:11,451 INFO L125 PetriNetUnfolderBase]: For 698172/698184 co-relation queries the response was YES. [2024-06-14 13:26:11,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105591 conditions, 13450 events. 9598/13450 cut-off events. For 698172/698184 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 73373 event pairs, 2999 based on Foata normal form. 16/13456 useless extension candidates. Maximal degree in co-relation 105501. Up to 12372 conditions per place. [2024-06-14 13:26:11,588 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 298 selfloop transitions, 104 changer transitions 0/408 dead transitions. [2024-06-14 13:26:11,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 408 transitions, 5785 flow [2024-06-14 13:26:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:26:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:26:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-06-14 13:26:11,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44939965694682676 [2024-06-14 13:26:11,590 INFO L175 Difference]: Start difference. First operand has 193 places, 297 transitions, 3649 flow. Second operand 11 states and 262 transitions. [2024-06-14 13:26:11,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 408 transitions, 5785 flow [2024-06-14 13:26:12,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 408 transitions, 5590 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 13:26:12,540 INFO L231 Difference]: Finished difference. Result has 203 places, 328 transitions, 4201 flow [2024-06-14 13:26:12,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4201, PETRI_PLACES=203, PETRI_TRANSITIONS=328} [2024-06-14 13:26:12,541 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 147 predicate places. [2024-06-14 13:26:12,541 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 328 transitions, 4201 flow [2024-06-14 13:26:12,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:12,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:12,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:12,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:26:12,542 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:12,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:12,542 INFO L85 PathProgramCache]: Analyzing trace with hash 194852232, now seen corresponding path program 2 times [2024-06-14 13:26:12,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:12,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140533308] [2024-06-14 13:26:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:12,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:16,050 INFO 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 13:26:16,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:16,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140533308] [2024-06-14 13:26:16,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140533308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:16,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:16,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:16,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840921989] [2024-06-14 13:26:16,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:16,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:16,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:16,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:16,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:16,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:26:16,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 328 transitions, 4201 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:16,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:16,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:26:16,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:20,642 INFO L124 PetriNetUnfolderBase]: 9990/13995 cut-off events. [2024-06-14 13:26:20,642 INFO L125 PetriNetUnfolderBase]: For 785260/785263 co-relation queries the response was YES. [2024-06-14 13:26:20,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114920 conditions, 13995 events. 9990/13995 cut-off events. For 785260/785263 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 76528 event pairs, 3011 based on Foata normal form. 18/14008 useless extension candidates. Maximal degree in co-relation 114826. Up to 12799 conditions per place. [2024-06-14 13:26:20,806 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 323 selfloop transitions, 86 changer transitions 0/415 dead transitions. [2024-06-14 13:26:20,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 415 transitions, 5940 flow [2024-06-14 13:26:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:26:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:26:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-14 13:26:20,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46037735849056605 [2024-06-14 13:26:20,808 INFO L175 Difference]: Start difference. First operand has 203 places, 328 transitions, 4201 flow. Second operand 10 states and 244 transitions. [2024-06-14 13:26:20,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 415 transitions, 5940 flow [2024-06-14 13:26:21,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 415 transitions, 5657 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:21,865 INFO L231 Difference]: Finished difference. Result has 209 places, 346 transitions, 4471 flow [2024-06-14 13:26:21,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3947, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4471, PETRI_PLACES=209, PETRI_TRANSITIONS=346} [2024-06-14 13:26:21,866 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 153 predicate places. [2024-06-14 13:26:21,866 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 346 transitions, 4471 flow [2024-06-14 13:26:21,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:21,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:21,866 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 13:26:21,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:26:21,867 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:21,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:21,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1159701982, now seen corresponding path program 3 times [2024-06-14 13:26:21,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:21,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475848664] [2024-06-14 13:26:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:21,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:25,118 INFO 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 13:26:25,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:25,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475848664] [2024-06-14 13:26:25,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475848664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:25,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:25,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:25,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021203233] [2024-06-14 13:26:25,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:25,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:25,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:25,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:25,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:26:25,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 346 transitions, 4471 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:25,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:25,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:26:25,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:29,777 INFO L124 PetriNetUnfolderBase]: 10042/14087 cut-off events. [2024-06-14 13:26:29,778 INFO L125 PetriNetUnfolderBase]: For 826063/826066 co-relation queries the response was YES. [2024-06-14 13:26:29,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118369 conditions, 14087 events. 10042/14087 cut-off events. For 826063/826066 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 77442 event pairs, 2981 based on Foata normal form. 18/14100 useless extension candidates. Maximal degree in co-relation 118272. Up to 12851 conditions per place. [2024-06-14 13:26:29,929 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 330 selfloop transitions, 97 changer transitions 0/433 dead transitions. [2024-06-14 13:26:29,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 433 transitions, 6016 flow [2024-06-14 13:26:29,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:26:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:26:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 284 transitions. [2024-06-14 13:26:29,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-06-14 13:26:29,931 INFO L175 Difference]: Start difference. First operand has 209 places, 346 transitions, 4471 flow. Second operand 12 states and 284 transitions. [2024-06-14 13:26:29,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 433 transitions, 6016 flow [2024-06-14 13:26:30,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 433 transitions, 5770 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:30,945 INFO L231 Difference]: Finished difference. Result has 215 places, 355 transitions, 4624 flow [2024-06-14 13:26:30,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4241, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4624, PETRI_PLACES=215, PETRI_TRANSITIONS=355} [2024-06-14 13:26:30,946 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 159 predicate places. [2024-06-14 13:26:30,946 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 355 transitions, 4624 flow [2024-06-14 13:26:30,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:30,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:30,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:30,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:26:30,947 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:30,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:30,947 INFO L85 PathProgramCache]: Analyzing trace with hash 194851891, now seen corresponding path program 4 times [2024-06-14 13:26:30,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:30,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314548776] [2024-06-14 13:26:30,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:30,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:34,584 INFO 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 13:26:34,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:34,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314548776] [2024-06-14 13:26:34,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314548776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:34,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:34,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:34,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005662529] [2024-06-14 13:26:34,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:34,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:34,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:34,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:34,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:34,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:26:34,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 355 transitions, 4624 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:34,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:34,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:26:34,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:38,925 INFO L124 PetriNetUnfolderBase]: 10061/14124 cut-off events. [2024-06-14 13:26:38,925 INFO L125 PetriNetUnfolderBase]: For 844159/844162 co-relation queries the response was YES. [2024-06-14 13:26:39,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119463 conditions, 14124 events. 10061/14124 cut-off events. For 844159/844162 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 77734 event pairs, 3085 based on Foata normal form. 4/14123 useless extension candidates. Maximal degree in co-relation 119364. Up to 13605 conditions per place. [2024-06-14 13:26:39,241 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 352 selfloop transitions, 45 changer transitions 0/403 dead transitions. [2024-06-14 13:26:39,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 403 transitions, 5644 flow [2024-06-14 13:26:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:39,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:26:39,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43160377358490565 [2024-06-14 13:26:39,243 INFO L175 Difference]: Start difference. First operand has 215 places, 355 transitions, 4624 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:26:39,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 403 transitions, 5644 flow [2024-06-14 13:26:40,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 403 transitions, 5339 flow, removed 66 selfloop flow, removed 9 redundant places. [2024-06-14 13:26:40,458 INFO L231 Difference]: Finished difference. Result has 214 places, 359 transitions, 4514 flow [2024-06-14 13:26:40,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4514, PETRI_PLACES=214, PETRI_TRANSITIONS=359} [2024-06-14 13:26:40,459 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 158 predicate places. [2024-06-14 13:26:40,459 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 359 transitions, 4514 flow [2024-06-14 13:26:40,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:40,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:40,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:40,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:26:40,459 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:40,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:40,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1012316868, now seen corresponding path program 1 times [2024-06-14 13:26:40,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:40,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877955978] [2024-06-14 13:26:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:40,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:44,900 INFO 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 13:26:44,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:44,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877955978] [2024-06-14 13:26:44,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877955978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:44,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:44,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:26:44,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178064785] [2024-06-14 13:26:44,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:44,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:26:44,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:44,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:26:44,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:26:44,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:26:44,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 359 transitions, 4514 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:44,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:44,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:26:44,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:49,478 INFO L124 PetriNetUnfolderBase]: 10086/14273 cut-off events. [2024-06-14 13:26:49,479 INFO L125 PetriNetUnfolderBase]: For 961243/961364 co-relation queries the response was YES. [2024-06-14 13:26:49,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119393 conditions, 14273 events. 10086/14273 cut-off events. For 961243/961364 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 80366 event pairs, 3020 based on Foata normal form. 82/14261 useless extension candidates. Maximal degree in co-relation 119293. Up to 12427 conditions per place. [2024-06-14 13:26:49,658 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 328 selfloop transitions, 66 changer transitions 0/426 dead transitions. [2024-06-14 13:26:49,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 426 transitions, 5764 flow [2024-06-14 13:26:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:26:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:26:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-14 13:26:49,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45660377358490567 [2024-06-14 13:26:49,660 INFO L175 Difference]: Start difference. First operand has 214 places, 359 transitions, 4514 flow. Second operand 10 states and 242 transitions. [2024-06-14 13:26:49,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 426 transitions, 5764 flow [2024-06-14 13:26:50,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 426 transitions, 5611 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:50,724 INFO L231 Difference]: Finished difference. Result has 218 places, 361 transitions, 4586 flow [2024-06-14 13:26:50,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4361, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4586, PETRI_PLACES=218, PETRI_TRANSITIONS=361} [2024-06-14 13:26:50,724 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 162 predicate places. [2024-06-14 13:26:50,724 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 361 transitions, 4586 flow [2024-06-14 13:26:50,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:50,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:50,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:50,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:26:50,725 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:50,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:50,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1528068129, now seen corresponding path program 5 times [2024-06-14 13:26:50,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:50,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670068451] [2024-06-14 13:26:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:50,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:54,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:54,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670068451] [2024-06-14 13:26:54,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670068451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:54,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:54,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:54,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17917793] [2024-06-14 13:26:54,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:54,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:54,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:54,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:54,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:54,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:26:54,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 361 transitions, 4586 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:54,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:54,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:26:54,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:58,838 INFO L124 PetriNetUnfolderBase]: 10676/14987 cut-off events. [2024-06-14 13:26:58,839 INFO L125 PetriNetUnfolderBase]: For 926282/926318 co-relation queries the response was YES. [2024-06-14 13:26:58,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125741 conditions, 14987 events. 10676/14987 cut-off events. For 926282/926318 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 83163 event pairs, 3308 based on Foata normal form. 19/14988 useless extension candidates. Maximal degree in co-relation 125640. Up to 14105 conditions per place. [2024-06-14 13:26:59,017 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 293 selfloop transitions, 118 changer transitions 0/417 dead transitions. [2024-06-14 13:26:59,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 417 transitions, 6020 flow [2024-06-14 13:26:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:59,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 13:26:59,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45754716981132076 [2024-06-14 13:26:59,019 INFO L175 Difference]: Start difference. First operand has 218 places, 361 transitions, 4586 flow. Second operand 8 states and 194 transitions. [2024-06-14 13:26:59,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 417 transitions, 6020 flow [2024-06-14 13:27:00,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 417 transitions, 5869 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:00,334 INFO L231 Difference]: Finished difference. Result has 219 places, 365 transitions, 4786 flow [2024-06-14 13:27:00,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4435, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4786, PETRI_PLACES=219, PETRI_TRANSITIONS=365} [2024-06-14 13:27:00,335 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 163 predicate places. [2024-06-14 13:27:00,335 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 365 transitions, 4786 flow [2024-06-14 13:27:00,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:00,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:00,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:00,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:27:00,336 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:27:00,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:00,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1528058829, now seen corresponding path program 6 times [2024-06-14 13:27:00,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:00,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244656571] [2024-06-14 13:27:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:00,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat