./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe027_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe027_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:30:03,127 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:30:03,190 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:30:03,193 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:30:03,193 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:30:03,206 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:30:03,207 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:30:03,207 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:30:03,207 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:30:03,208 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:30:03,208 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:30:03,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:30:03,209 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:30:03,209 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:30:03,209 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:30:03,210 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:30:03,210 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:30:03,210 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:30:03,211 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:30:03,211 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:30:03,211 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:30:03,215 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:30:03,216 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:30:03,216 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:30:03,216 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:30:03,216 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:30:03,217 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:30:03,221 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:30:03,221 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:30:03,221 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:30:03,222 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:30:03,222 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:30:03,222 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:30:03,222 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:30:03,223 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:30:03,223 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:30:03,223 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:30:03,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:30:03,223 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:30:03,224 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:30:03,224 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:30:03,224 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:30:03,224 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:30:03,224 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:30:03,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:30:03,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:30:03,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:30:03,472 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:30:03,472 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:30:03,473 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe027_power.oepc.yml/witness.yml [2024-06-14 13:30:03,803 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:30:03,804 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:30:03,806 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i [2024-06-14 13:30:04,889 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:30:05,090 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:30:05,091 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_power.oepc.i [2024-06-14 13:30:05,103 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b6c40a9e/68d0ef24f8e1496aabb4945378d8e906/FLAG48d903917 [2024-06-14 13:30:05,114 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b6c40a9e/68d0ef24f8e1496aabb4945378d8e906 [2024-06-14 13:30:05,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:30:05,118 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:30:05,121 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:30:05,122 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:30:05,126 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:30:05,127 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:30:03" (1/2) ... [2024-06-14 13:30:05,128 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6ba1b3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:30:05, skipping insertion in model container [2024-06-14 13:30:05,128 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:30:03" (1/2) ... [2024-06-14 13:30:05,130 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@42e116c1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:30:05, skipping insertion in model container [2024-06-14 13:30:05,130 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:30:05" (2/2) ... [2024-06-14 13:30:05,130 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6ba1b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05, skipping insertion in model container [2024-06-14 13:30:05,130 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:30:05" (2/2) ... [2024-06-14 13:30:05,130 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:30:05,311 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:30:05,312 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 13:30:05,312 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] (((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 13:30:05,312 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 13:30:05,312 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] (((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & y) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 13:30:05,312 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:30:05,312 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-14 13:30:05,349 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:30:05,670 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:30:05,684 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 13:30:05,864 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:30:05,907 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:30:05,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05 WrapperNode [2024-06-14 13:30:05,908 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:30:05,920 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:30:05,920 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:30:05,921 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:30:05,926 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05" (1/1) ... [2024-06-14 13:30:05,958 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05" (1/1) ... [2024-06-14 13:30:06,006 INFO L138 Inliner]: procedures = 176, calls = 101, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 246 [2024-06-14 13:30:06,007 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:30:06,008 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:30:06,008 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:30:06,011 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:30:06,020 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05" (1/1) ... [2024-06-14 13:30:06,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05" (1/1) ... [2024-06-14 13:30:06,024 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05" (1/1) ... [2024-06-14 13:30:06,044 INFO L175 MemorySlicer]: Split 55 memory accesses to 2 slices as follows [2, 53]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 7 writes are split as follows [0, 7]. [2024-06-14 13:30:06,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05" (1/1) ... [2024-06-14 13:30:06,045 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05" (1/1) ... [2024-06-14 13:30:06,059 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05" (1/1) ... [2024-06-14 13:30:06,064 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05" (1/1) ... [2024-06-14 13:30:06,074 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05" (1/1) ... [2024-06-14 13:30:06,077 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05" (1/1) ... [2024-06-14 13:30:06,081 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:30:06,082 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:30:06,082 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:30:06,082 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:30:06,083 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05" (1/1) ... [2024-06-14 13:30:06,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:30:06,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:30:06,146 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 13:30:06,166 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 13:30:06,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:30:06,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:30:06,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:30:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:30:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:30:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:30:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:30:06,183 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:30:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:30:06,183 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:30:06,183 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:30:06,184 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:30:06,184 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 13:30:06,184 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 13:30:06,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:30:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:30:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:30:06,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:30:06,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:30:06,187 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 13:30:06,320 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:30:06,322 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:30:06,922 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:30:06,922 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:30:07,384 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:30:07,384 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:30:07,385 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:30:07 BoogieIcfgContainer [2024-06-14 13:30:07,385 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:30:07,388 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:30:07,388 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:30:07,390 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:30:07,390 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:30:03" (1/4) ... [2024-06-14 13:30:07,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1d1961 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:30:07, skipping insertion in model container [2024-06-14 13:30:07,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:30:05" (2/4) ... [2024-06-14 13:30:07,392 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1d1961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:30:07, skipping insertion in model container [2024-06-14 13:30:07,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:30:05" (3/4) ... [2024-06-14 13:30:07,393 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1d1961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:30:07, skipping insertion in model container [2024-06-14 13:30:07,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:30:07" (4/4) ... [2024-06-14 13:30:07,394 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_power.oepc.i [2024-06-14 13:30:07,408 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:30:07,408 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 13:30:07,408 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:30:07,467 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:30:07,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:30:07,544 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 13:30:07,544 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:30:07,547 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 74 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 13:30:07,547 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:30:07,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 13:30:07,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:30:07,561 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;@10c24f74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:30:07,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 13:30:07,566 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:30:07,566 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 13:30:07,566 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:30:07,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:07,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:30:07,567 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 13:30:07,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:07,571 INFO L85 PathProgramCache]: Analyzing trace with hash 890432090, now seen corresponding path program 1 times [2024-06-14 13:30:07,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:07,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759818992] [2024-06-14 13:30:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:07,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:09,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:09,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759818992] [2024-06-14 13:30:09,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759818992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:09,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:09,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:30:09,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632167328] [2024-06-14 13:30:09,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:09,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:30:09,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:30:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:30:10,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 13:30:10,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:10,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:10,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 13:30:10,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:11,310 INFO L124 PetriNetUnfolderBase]: 3447/4990 cut-off events. [2024-06-14 13:30:11,311 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-06-14 13:30:11,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9990 conditions, 4990 events. 3447/4990 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26739 event pairs, 2406 based on Foata normal form. 2/4889 useless extension candidates. Maximal degree in co-relation 9974. Up to 4797 conditions per place. [2024-06-14 13:30:11,341 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 47 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-06-14 13:30:11,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 247 flow [2024-06-14 13:30:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:30:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:30:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-14 13:30:11,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-06-14 13:30:11,352 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 95 transitions. [2024-06-14 13:30:11,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 247 flow [2024-06-14 13:30:11,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 240 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:30:11,357 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 13:30:11,358 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 13:30:11,360 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 13:30:11,361 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 13:30:11,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:11,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:11,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:11,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:30:11,362 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 13:30:11,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:11,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1006792825, now seen corresponding path program 1 times [2024-06-14 13:30:11,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:11,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686620214] [2024-06-14 13:30:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:11,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:14,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:14,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686620214] [2024-06-14 13:30:14,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686620214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:14,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:14,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:30:14,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982201950] [2024-06-14 13:30:14,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:14,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:30:14,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:14,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:30:14,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:30:14,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 13:30:14,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:14,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:14,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 13:30:14,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:15,789 INFO L124 PetriNetUnfolderBase]: 3430/4914 cut-off events. [2024-06-14 13:30:15,790 INFO L125 PetriNetUnfolderBase]: For 959/959 co-relation queries the response was YES. [2024-06-14 13:30:15,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11501 conditions, 4914 events. 3430/4914 cut-off events. For 959/959 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26105 event pairs, 1692 based on Foata normal form. 6/4917 useless extension candidates. Maximal degree in co-relation 11486. Up to 4730 conditions per place. [2024-06-14 13:30:15,811 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 61 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2024-06-14 13:30:15,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 79 transitions, 355 flow [2024-06-14 13:30:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:30:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:30:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-14 13:30:15,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5943396226415094 [2024-06-14 13:30:15,814 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 126 transitions. [2024-06-14 13:30:15,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 79 transitions, 355 flow [2024-06-14 13:30:15,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:30:15,816 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-14 13:30:15,817 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 13:30:15,818 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-14 13:30:15,818 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-14 13:30:15,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:15,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:15,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:15,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:30:15,825 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 13:30:15,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:15,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1609918088, now seen corresponding path program 1 times [2024-06-14 13:30:15,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:15,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525564141] [2024-06-14 13:30:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:15,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:19,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:19,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525564141] [2024-06-14 13:30:19,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525564141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:19,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:19,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:30:19,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341631079] [2024-06-14 13:30:19,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:19,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:30:19,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:19,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:30:19,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:30:19,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 13:30:19,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:19,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:19,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 13:30:19,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:21,892 INFO L124 PetriNetUnfolderBase]: 4421/6338 cut-off events. [2024-06-14 13:30:21,893 INFO L125 PetriNetUnfolderBase]: For 3802/3862 co-relation queries the response was YES. [2024-06-14 13:30:21,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16592 conditions, 6338 events. 4421/6338 cut-off events. For 3802/3862 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 33898 event pairs, 1887 based on Foata normal form. 24/6344 useless extension candidates. Maximal degree in co-relation 16575. Up to 5862 conditions per place. [2024-06-14 13:30:21,930 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 89 selfloop transitions, 15 changer transitions 0/112 dead transitions. [2024-06-14 13:30:21,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 112 transitions, 558 flow [2024-06-14 13:30:21,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:30:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:30:21,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-14 13:30:21,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-14 13:30:21,933 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 180 transitions. [2024-06-14 13:30:21,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 112 transitions, 558 flow [2024-06-14 13:30:21,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 112 transitions, 530 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 13:30:21,937 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 233 flow [2024-06-14 13:30:21,937 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=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=233, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-14 13:30:21,938 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-14 13:30:21,938 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 233 flow [2024-06-14 13:30:21,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:21,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:21,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:21,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:30:21,939 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 13:30:21,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:21,939 INFO L85 PathProgramCache]: Analyzing trace with hash -665534727, now seen corresponding path program 1 times [2024-06-14 13:30:21,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:21,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455889561] [2024-06-14 13:30:21,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:21,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:23,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:23,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455889561] [2024-06-14 13:30:23,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455889561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:23,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:23,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:30:23,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250671649] [2024-06-14 13:30:23,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:23,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:30:23,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:23,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:30:23,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:30:23,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:30:23,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:23,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:23,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:30:23,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:25,512 INFO L124 PetriNetUnfolderBase]: 5539/7856 cut-off events. [2024-06-14 13:30:25,513 INFO L125 PetriNetUnfolderBase]: For 8059/8059 co-relation queries the response was YES. [2024-06-14 13:30:25,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22199 conditions, 7856 events. 5539/7856 cut-off events. For 8059/8059 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 41363 event pairs, 2800 based on Foata normal form. 3/7858 useless extension candidates. Maximal degree in co-relation 22180. Up to 7625 conditions per place. [2024-06-14 13:30:25,559 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 69 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-14 13:30:25,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 484 flow [2024-06-14 13:30:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:30:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:30:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-14 13:30:25,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-14 13:30:25,561 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 233 flow. Second operand 5 states and 123 transitions. [2024-06-14 13:30:25,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 484 flow [2024-06-14 13:30:25,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 454 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:30:25,567 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 292 flow [2024-06-14 13:30:25,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-14 13:30:25,568 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-06-14 13:30:25,568 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 292 flow [2024-06-14 13:30:25,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:25,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:25,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:25,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:30:25,569 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 13:30:25,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:25,569 INFO L85 PathProgramCache]: Analyzing trace with hash 157098560, now seen corresponding path program 1 times [2024-06-14 13:30:25,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:25,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123184587] [2024-06-14 13:30:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:25,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:28,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:28,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123184587] [2024-06-14 13:30:28,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123184587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:28,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:28,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:30:28,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804169344] [2024-06-14 13:30:28,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:28,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:30:28,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:28,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:30:28,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:30:28,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:30:28,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:28,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:28,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:30:28,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:30,879 INFO L124 PetriNetUnfolderBase]: 5566/7888 cut-off events. [2024-06-14 13:30:30,879 INFO L125 PetriNetUnfolderBase]: For 11592/11592 co-relation queries the response was YES. [2024-06-14 13:30:30,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24331 conditions, 7888 events. 5566/7888 cut-off events. For 11592/11592 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41587 event pairs, 2657 based on Foata normal form. 3/7888 useless extension candidates. Maximal degree in co-relation 24309. Up to 7594 conditions per place. [2024-06-14 13:30:30,941 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 86 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-14 13:30:30,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 113 transitions, 679 flow [2024-06-14 13:30:30,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:30:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:30:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 13:30:30,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 13:30:30,947 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 292 flow. Second operand 6 states and 156 transitions. [2024-06-14 13:30:30,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 113 transitions, 679 flow [2024-06-14 13:30:30,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 113 transitions, 669 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-14 13:30:30,955 INFO L231 Difference]: Finished difference. Result has 71 places, 75 transitions, 415 flow [2024-06-14 13:30:30,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=415, PETRI_PLACES=71, PETRI_TRANSITIONS=75} [2024-06-14 13:30:30,958 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-14 13:30:30,959 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 75 transitions, 415 flow [2024-06-14 13:30:30,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:30,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:30,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:30,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:30:30,960 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 13:30:30,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:30,960 INFO L85 PathProgramCache]: Analyzing trace with hash 386485466, now seen corresponding path program 2 times [2024-06-14 13:30:30,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:30,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349650106] [2024-06-14 13:30:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:30,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:33,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:33,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349650106] [2024-06-14 13:30:33,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349650106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:33,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:33,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:30:33,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910162306] [2024-06-14 13:30:33,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:33,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:30:33,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:33,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:30:33,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:30:33,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:30:33,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 75 transitions, 415 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:33,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:33,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:30:33,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:35,935 INFO L124 PetriNetUnfolderBase]: 5557/7886 cut-off events. [2024-06-14 13:30:35,936 INFO L125 PetriNetUnfolderBase]: For 16947/16958 co-relation queries the response was YES. [2024-06-14 13:30:35,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26602 conditions, 7886 events. 5557/7886 cut-off events. For 16947/16958 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41581 event pairs, 2675 based on Foata normal form. 13/7897 useless extension candidates. Maximal degree in co-relation 26576. Up to 7585 conditions per place. [2024-06-14 13:30:35,978 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 79 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-14 13:30:35,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 107 transitions, 698 flow [2024-06-14 13:30:35,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:30:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:30:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 13:30:35,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46855345911949686 [2024-06-14 13:30:35,981 INFO L175 Difference]: Start difference. First operand has 71 places, 75 transitions, 415 flow. Second operand 6 states and 149 transitions. [2024-06-14 13:30:35,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 107 transitions, 698 flow [2024-06-14 13:30:35,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 107 transitions, 652 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 13:30:36,001 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 429 flow [2024-06-14 13:30:36,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=429, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-14 13:30:36,002 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-14 13:30:36,002 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 429 flow [2024-06-14 13:30:36,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:36,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:36,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:36,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:30:36,003 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 13:30:36,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:36,004 INFO L85 PathProgramCache]: Analyzing trace with hash 371299992, now seen corresponding path program 1 times [2024-06-14 13:30:36,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:36,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532060502] [2024-06-14 13:30:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:36,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:37,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:37,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532060502] [2024-06-14 13:30:37,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532060502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:37,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:37,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:30:37,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650038793] [2024-06-14 13:30:37,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:37,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:30:37,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:37,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:30:37,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:30:37,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:30:37,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 429 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:37,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:37,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:30:37,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:39,756 INFO L124 PetriNetUnfolderBase]: 5542/7864 cut-off events. [2024-06-14 13:30:39,757 INFO L125 PetriNetUnfolderBase]: For 19247/19247 co-relation queries the response was YES. [2024-06-14 13:30:39,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26765 conditions, 7864 events. 5542/7864 cut-off events. For 19247/19247 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 41439 event pairs, 2523 based on Foata normal form. 6/7869 useless extension candidates. Maximal degree in co-relation 26738. Up to 7591 conditions per place. [2024-06-14 13:30:39,814 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 91 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2024-06-14 13:30:39,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 111 transitions, 737 flow [2024-06-14 13:30:39,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:30:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:30:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:30:39,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 13:30:39,817 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 429 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:30:39,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 111 transitions, 737 flow [2024-06-14 13:30:39,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 111 transitions, 704 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 13:30:39,830 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 460 flow [2024-06-14 13:30:39,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=460, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2024-06-14 13:30:39,831 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-14 13:30:39,831 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 460 flow [2024-06-14 13:30:39,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:39,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:39,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:39,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:30:39,832 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 13:30:39,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:39,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1885778298, now seen corresponding path program 1 times [2024-06-14 13:30:39,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:39,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937314147] [2024-06-14 13:30:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:39,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:43,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:43,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937314147] [2024-06-14 13:30:43,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937314147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:43,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:43,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:43,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779434104] [2024-06-14 13:30:43,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:43,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:43,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:43,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:43,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:43,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:30:43,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 460 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:43,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:43,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:30:43,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:45,619 INFO L124 PetriNetUnfolderBase]: 5607/7987 cut-off events. [2024-06-14 13:30:45,620 INFO L125 PetriNetUnfolderBase]: For 24976/24976 co-relation queries the response was YES. [2024-06-14 13:30:45,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28621 conditions, 7987 events. 5607/7987 cut-off events. For 24976/24976 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 42795 event pairs, 2297 based on Foata normal form. 7/7992 useless extension candidates. Maximal degree in co-relation 28592. Up to 7544 conditions per place. [2024-06-14 13:30:45,659 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 105 selfloop transitions, 25 changer transitions 0/137 dead transitions. [2024-06-14 13:30:45,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 137 transitions, 888 flow [2024-06-14 13:30:45,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 13:30:45,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040431266846361 [2024-06-14 13:30:45,662 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 460 flow. Second operand 7 states and 187 transitions. [2024-06-14 13:30:45,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 137 transitions, 888 flow [2024-06-14 13:30:45,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 137 transitions, 850 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:30:45,679 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 530 flow [2024-06-14 13:30:45,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-14 13:30:45,682 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-14 13:30:45,682 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 530 flow [2024-06-14 13:30:45,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:45,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:45,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:45,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:30:45,683 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 13:30:45,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:45,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1885898268, now seen corresponding path program 2 times [2024-06-14 13:30:45,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:45,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358237318] [2024-06-14 13:30:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:45,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:48,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:48,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358237318] [2024-06-14 13:30:48,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358237318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:48,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:48,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:48,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956241765] [2024-06-14 13:30:48,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:48,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:48,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:48,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:48,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:48,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:30:48,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 530 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:48,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:48,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:30:48,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:51,348 INFO L124 PetriNetUnfolderBase]: 5634/8009 cut-off events. [2024-06-14 13:30:51,348 INFO L125 PetriNetUnfolderBase]: For 32173/32173 co-relation queries the response was YES. [2024-06-14 13:30:51,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31349 conditions, 8009 events. 5634/8009 cut-off events. For 32173/32173 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42374 event pairs, 2484 based on Foata normal form. 3/8009 useless extension candidates. Maximal degree in co-relation 31319. Up to 7601 conditions per place. [2024-06-14 13:30:51,385 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 104 selfloop transitions, 34 changer transitions 0/145 dead transitions. [2024-06-14 13:30:51,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 145 transitions, 1098 flow [2024-06-14 13:30:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:51,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 13:30:51,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 13:30:51,387 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 530 flow. Second operand 7 states and 182 transitions. [2024-06-14 13:30:51,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 145 transitions, 1098 flow [2024-06-14 13:30:51,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 145 transitions, 1002 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:30:51,404 INFO L231 Difference]: Finished difference. Result has 84 places, 98 transitions, 688 flow [2024-06-14 13:30:51,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=688, PETRI_PLACES=84, PETRI_TRANSITIONS=98} [2024-06-14 13:30:51,405 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 28 predicate places. [2024-06-14 13:30:51,405 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 98 transitions, 688 flow [2024-06-14 13:30:51,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:51,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:51,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:51,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:30:51,406 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 13:30:51,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:51,406 INFO L85 PathProgramCache]: Analyzing trace with hash -903851206, now seen corresponding path program 3 times [2024-06-14 13:30:51,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:51,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782452862] [2024-06-14 13:30:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:51,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:54,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:54,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782452862] [2024-06-14 13:30:54,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782452862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:54,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:54,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:54,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177929648] [2024-06-14 13:30:54,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:54,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:54,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:54,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:54,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:54,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:30:54,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 98 transitions, 688 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:54,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:54,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:30:54,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:56,851 INFO L124 PetriNetUnfolderBase]: 5625/7999 cut-off events. [2024-06-14 13:30:56,851 INFO L125 PetriNetUnfolderBase]: For 41308/41308 co-relation queries the response was YES. [2024-06-14 13:30:56,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33416 conditions, 7999 events. 5625/7999 cut-off events. For 41308/41308 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 42221 event pairs, 2501 based on Foata normal form. 3/7998 useless extension candidates. Maximal degree in co-relation 33383. Up to 7592 conditions per place. [2024-06-14 13:30:56,897 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 97 selfloop transitions, 35 changer transitions 0/139 dead transitions. [2024-06-14 13:30:56,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 139 transitions, 1061 flow [2024-06-14 13:30:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 13:30:56,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-14 13:30:56,900 INFO L175 Difference]: Start difference. First operand has 84 places, 98 transitions, 688 flow. Second operand 7 states and 175 transitions. [2024-06-14 13:30:56,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 139 transitions, 1061 flow [2024-06-14 13:30:56,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 139 transitions, 997 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 13:30:56,947 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 716 flow [2024-06-14 13:30:56,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=716, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2024-06-14 13:30:56,959 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 33 predicate places. [2024-06-14 13:30:56,959 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 716 flow [2024-06-14 13:30:56,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:56,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:56,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:56,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:30:56,960 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 13:30:56,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:56,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2045193063, now seen corresponding path program 1 times [2024-06-14 13:30:56,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:56,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138837927] [2024-06-14 13:30:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:56,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:59,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:59,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138837927] [2024-06-14 13:30:59,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138837927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:59,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:59,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:30:59,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469057503] [2024-06-14 13:30:59,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:59,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:30:59,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:59,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:30:59,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:30:59,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:30:59,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 716 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:59,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:59,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:30:59,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:01,643 INFO L124 PetriNetUnfolderBase]: 5771/8218 cut-off events. [2024-06-14 13:31:01,644 INFO L125 PetriNetUnfolderBase]: For 47315/47315 co-relation queries the response was YES. [2024-06-14 13:31:01,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35197 conditions, 8218 events. 5771/8218 cut-off events. For 47315/47315 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 43500 event pairs, 2484 based on Foata normal form. 6/8221 useless extension candidates. Maximal degree in co-relation 35162. Up to 7798 conditions per place. [2024-06-14 13:31:01,699 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 125 selfloop transitions, 42 changer transitions 0/174 dead transitions. [2024-06-14 13:31:01,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 174 transitions, 1396 flow [2024-06-14 13:31:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:01,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 13:31:01,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-14 13:31:01,703 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 716 flow. Second operand 8 states and 204 transitions. [2024-06-14 13:31:01,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 174 transitions, 1396 flow [2024-06-14 13:31:01,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 174 transitions, 1310 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:31:01,781 INFO L231 Difference]: Finished difference. Result has 95 places, 121 transitions, 983 flow [2024-06-14 13:31:01,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=983, PETRI_PLACES=95, PETRI_TRANSITIONS=121} [2024-06-14 13:31:01,782 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-14 13:31:01,782 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 121 transitions, 983 flow [2024-06-14 13:31:01,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:01,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:01,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:01,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:31:01,782 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 13:31:01,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:01,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1666688617, now seen corresponding path program 2 times [2024-06-14 13:31:01,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:01,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771374478] [2024-06-14 13:31:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:01,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:04,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:04,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771374478] [2024-06-14 13:31:04,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771374478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:04,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:04,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:31:04,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868547502] [2024-06-14 13:31:04,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:04,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:31:04,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:31:04,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:31:04,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:31:04,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 121 transitions, 983 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:04,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:04,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:31:04,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:07,597 INFO L124 PetriNetUnfolderBase]: 5815/8286 cut-off events. [2024-06-14 13:31:07,598 INFO L125 PetriNetUnfolderBase]: For 57163/57163 co-relation queries the response was YES. [2024-06-14 13:31:07,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37335 conditions, 8286 events. 5815/8286 cut-off events. For 57163/57163 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 44000 event pairs, 2446 based on Foata normal form. 6/8289 useless extension candidates. Maximal degree in co-relation 37296. Up to 7816 conditions per place. [2024-06-14 13:31:07,645 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 120 selfloop transitions, 43 changer transitions 0/170 dead transitions. [2024-06-14 13:31:07,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 170 transitions, 1487 flow [2024-06-14 13:31:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:07,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 13:31:07,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-14 13:31:07,647 INFO L175 Difference]: Start difference. First operand has 95 places, 121 transitions, 983 flow. Second operand 7 states and 177 transitions. [2024-06-14 13:31:07,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 170 transitions, 1487 flow [2024-06-14 13:31:07,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 170 transitions, 1415 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 13:31:07,692 INFO L231 Difference]: Finished difference. Result has 99 places, 124 transitions, 1058 flow [2024-06-14 13:31:07,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1058, PETRI_PLACES=99, PETRI_TRANSITIONS=124} [2024-06-14 13:31:07,692 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-14 13:31:07,692 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 124 transitions, 1058 flow [2024-06-14 13:31:07,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:07,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:07,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:07,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:31:07,693 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 13:31:07,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:07,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2045390905, now seen corresponding path program 3 times [2024-06-14 13:31:07,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:07,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82324961] [2024-06-14 13:31:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:07,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:10,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:10,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82324961] [2024-06-14 13:31:10,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82324961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:10,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:10,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:31:10,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190184809] [2024-06-14 13:31:10,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:10,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:31:10,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:10,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:31:10,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:31:10,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:31:10,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 124 transitions, 1058 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:10,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:10,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:31:10,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:13,007 INFO L124 PetriNetUnfolderBase]: 5859/8360 cut-off events. [2024-06-14 13:31:13,008 INFO L125 PetriNetUnfolderBase]: For 67789/67800 co-relation queries the response was YES. [2024-06-14 13:31:13,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39240 conditions, 8360 events. 5859/8360 cut-off events. For 67789/67800 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 44370 event pairs, 2465 based on Foata normal form. 16/8373 useless extension candidates. Maximal degree in co-relation 39200. Up to 7918 conditions per place. [2024-06-14 13:31:13,054 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 124 selfloop transitions, 40 changer transitions 0/171 dead transitions. [2024-06-14 13:31:13,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 171 transitions, 1570 flow [2024-06-14 13:31:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:13,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 13:31:13,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46630727762803237 [2024-06-14 13:31:13,057 INFO L175 Difference]: Start difference. First operand has 99 places, 124 transitions, 1058 flow. Second operand 7 states and 173 transitions. [2024-06-14 13:31:13,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 171 transitions, 1570 flow [2024-06-14 13:31:13,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 171 transitions, 1447 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:13,110 INFO L231 Difference]: Finished difference. Result has 101 places, 127 transitions, 1078 flow [2024-06-14 13:31:13,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1078, PETRI_PLACES=101, PETRI_TRANSITIONS=127} [2024-06-14 13:31:13,111 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-14 13:31:13,111 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 127 transitions, 1078 flow [2024-06-14 13:31:13,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:13,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:13,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:31:13,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:31:13,112 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 13:31:13,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1649096707, now seen corresponding path program 4 times [2024-06-14 13:31:13,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:13,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825217768] [2024-06-14 13:31:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:13,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:15,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:15,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:15,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825217768] [2024-06-14 13:31:15,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825217768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:15,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:15,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:31:15,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927554513] [2024-06-14 13:31:15,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:15,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:31:15,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:15,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:31:15,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:31:15,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:31:15,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 127 transitions, 1078 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:15,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:15,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:31:15,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:18,115 INFO L124 PetriNetUnfolderBase]: 5844/8347 cut-off events. [2024-06-14 13:31:18,116 INFO L125 PetriNetUnfolderBase]: For 67144/67155 co-relation queries the response was YES. [2024-06-14 13:31:18,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38935 conditions, 8347 events. 5844/8347 cut-off events. For 67144/67155 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 44354 event pairs, 2268 based on Foata normal form. 16/8360 useless extension candidates. Maximal degree in co-relation 38894. Up to 7727 conditions per place. [2024-06-14 13:31:18,170 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 116 selfloop transitions, 51 changer transitions 0/174 dead transitions. [2024-06-14 13:31:18,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 174 transitions, 1590 flow [2024-06-14 13:31:18,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 13:31:18,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46900269541778977 [2024-06-14 13:31:18,172 INFO L175 Difference]: Start difference. First operand has 101 places, 127 transitions, 1078 flow. Second operand 7 states and 174 transitions. [2024-06-14 13:31:18,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 174 transitions, 1590 flow [2024-06-14 13:31:18,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 174 transitions, 1481 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:18,225 INFO L231 Difference]: Finished difference. Result has 103 places, 130 transitions, 1133 flow [2024-06-14 13:31:18,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1133, PETRI_PLACES=103, PETRI_TRANSITIONS=130} [2024-06-14 13:31:18,225 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-14 13:31:18,225 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 130 transitions, 1133 flow [2024-06-14 13:31:18,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:18,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:18,226 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 13:31:18,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:31:18,226 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 13:31:18,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:18,226 INFO L85 PathProgramCache]: Analyzing trace with hash -445469353, now seen corresponding path program 1 times [2024-06-14 13:31:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:18,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809923583] [2024-06-14 13:31:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:18,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:21,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:21,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809923583] [2024-06-14 13:31:21,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809923583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:21,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:21,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:21,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334410168] [2024-06-14 13:31:21,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:21,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:21,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:21,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:21,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:21,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:31:21,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 130 transitions, 1133 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:21,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:21,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:31:21,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:24,848 INFO L124 PetriNetUnfolderBase]: 7286/10530 cut-off events. [2024-06-14 13:31:24,848 INFO L125 PetriNetUnfolderBase]: For 103987/103987 co-relation queries the response was YES. [2024-06-14 13:31:24,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50795 conditions, 10530 events. 7286/10530 cut-off events. For 103987/103987 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 60038 event pairs, 2102 based on Foata normal form. 78/10606 useless extension candidates. Maximal degree in co-relation 50753. Up to 7983 conditions per place. [2024-06-14 13:31:24,920 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 177 selfloop transitions, 40 changer transitions 0/224 dead transitions. [2024-06-14 13:31:24,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 224 transitions, 2023 flow [2024-06-14 13:31:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-06-14 13:31:24,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220125786163522 [2024-06-14 13:31:24,922 INFO L175 Difference]: Start difference. First operand has 103 places, 130 transitions, 1133 flow. Second operand 9 states and 249 transitions. [2024-06-14 13:31:24,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 224 transitions, 2023 flow [2024-06-14 13:31:25,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 224 transitions, 1885 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:25,036 INFO L231 Difference]: Finished difference. Result has 108 places, 136 transitions, 1200 flow [2024-06-14 13:31:25,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1200, PETRI_PLACES=108, PETRI_TRANSITIONS=136} [2024-06-14 13:31:25,037 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-14 13:31:25,037 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 136 transitions, 1200 flow [2024-06-14 13:31:25,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:25,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:25,038 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 13:31:25,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:31:25,038 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 13:31:25,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:25,038 INFO L85 PathProgramCache]: Analyzing trace with hash -132391439, now seen corresponding path program 2 times [2024-06-14 13:31:25,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:25,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099351800] [2024-06-14 13:31:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:25,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:29,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:29,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099351800] [2024-06-14 13:31:29,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099351800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:29,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:29,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:29,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182450086] [2024-06-14 13:31:29,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:29,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:29,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:29,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:29,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:29,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:31:29,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 136 transitions, 1200 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:29,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:29,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:31:29,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:31,858 INFO L124 PetriNetUnfolderBase]: 7060/10226 cut-off events. [2024-06-14 13:31:31,858 INFO L125 PetriNetUnfolderBase]: For 112474/112474 co-relation queries the response was YES. [2024-06-14 13:31:31,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49737 conditions, 10226 events. 7060/10226 cut-off events. For 112474/112474 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 58346 event pairs, 2606 based on Foata normal form. 92/10316 useless extension candidates. Maximal degree in co-relation 49693. Up to 8833 conditions per place. [2024-06-14 13:31:31,915 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 163 selfloop transitions, 36 changer transitions 0/206 dead transitions. [2024-06-14 13:31:31,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 206 transitions, 1833 flow [2024-06-14 13:31:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-14 13:31:31,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-14 13:31:31,918 INFO L175 Difference]: Start difference. First operand has 108 places, 136 transitions, 1200 flow. Second operand 8 states and 216 transitions. [2024-06-14 13:31:31,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 206 transitions, 1833 flow [2024-06-14 13:31:32,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 206 transitions, 1749 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:32,027 INFO L231 Difference]: Finished difference. Result has 111 places, 137 transitions, 1222 flow [2024-06-14 13:31:32,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1222, PETRI_PLACES=111, PETRI_TRANSITIONS=137} [2024-06-14 13:31:32,028 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-14 13:31:32,028 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 137 transitions, 1222 flow [2024-06-14 13:31:32,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:32,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:32,028 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 13:31:32,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:31:32,029 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 13:31:32,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:32,029 INFO L85 PathProgramCache]: Analyzing trace with hash -298174779, now seen corresponding path program 3 times [2024-06-14 13:31:32,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:32,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523248238] [2024-06-14 13:31:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:32,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:35,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:35,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523248238] [2024-06-14 13:31:35,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523248238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:35,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:35,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:35,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232481287] [2024-06-14 13:31:35,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:35,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:35,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:35,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:31:35,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 137 transitions, 1222 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:35,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:35,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:31:35,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:38,714 INFO L124 PetriNetUnfolderBase]: 7216/10437 cut-off events. [2024-06-14 13:31:38,715 INFO L125 PetriNetUnfolderBase]: For 110233/110233 co-relation queries the response was YES. [2024-06-14 13:31:38,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50890 conditions, 10437 events. 7216/10437 cut-off events. For 110233/110233 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 59695 event pairs, 2729 based on Foata normal form. 24/10458 useless extension candidates. Maximal degree in co-relation 50844. Up to 9653 conditions per place. [2024-06-14 13:31:38,788 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 140 selfloop transitions, 51 changer transitions 0/198 dead transitions. [2024-06-14 13:31:38,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 198 transitions, 1836 flow [2024-06-14 13:31:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:38,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 13:31:38,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834905660377358 [2024-06-14 13:31:38,797 INFO L175 Difference]: Start difference. First operand has 111 places, 137 transitions, 1222 flow. Second operand 8 states and 205 transitions. [2024-06-14 13:31:38,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 198 transitions, 1836 flow [2024-06-14 13:31:38,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 198 transitions, 1769 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:38,886 INFO L231 Difference]: Finished difference. Result has 113 places, 139 transitions, 1315 flow [2024-06-14 13:31:38,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1315, PETRI_PLACES=113, PETRI_TRANSITIONS=139} [2024-06-14 13:31:38,887 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-14 13:31:38,888 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 139 transitions, 1315 flow [2024-06-14 13:31:38,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:38,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:38,889 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 13:31:38,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:31:38,889 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 13:31:38,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:38,889 INFO L85 PathProgramCache]: Analyzing trace with hash -127738339, now seen corresponding path program 1 times [2024-06-14 13:31:38,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:38,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077515559] [2024-06-14 13:31:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:38,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:42,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:42,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077515559] [2024-06-14 13:31:42,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077515559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:42,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:42,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:42,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204423006] [2024-06-14 13:31:42,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:42,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:42,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:42,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:42,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:42,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:31:42,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 139 transitions, 1315 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:42,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:42,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:31:42,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:45,419 INFO L124 PetriNetUnfolderBase]: 7328/10629 cut-off events. [2024-06-14 13:31:45,419 INFO L125 PetriNetUnfolderBase]: For 124149/124149 co-relation queries the response was YES. [2024-06-14 13:31:45,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52945 conditions, 10629 events. 7328/10629 cut-off events. For 124149/124149 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 61298 event pairs, 2713 based on Foata normal form. 18/10644 useless extension candidates. Maximal degree in co-relation 52898. Up to 9385 conditions per place. [2024-06-14 13:31:45,492 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 139 selfloop transitions, 58 changer transitions 0/204 dead transitions. [2024-06-14 13:31:45,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 204 transitions, 1976 flow [2024-06-14 13:31:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:45,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 13:31:45,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-14 13:31:45,496 INFO L175 Difference]: Start difference. First operand has 113 places, 139 transitions, 1315 flow. Second operand 8 states and 207 transitions. [2024-06-14 13:31:45,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 204 transitions, 1976 flow [2024-06-14 13:31:45,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 204 transitions, 1854 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:45,622 INFO L231 Difference]: Finished difference. Result has 116 places, 142 transitions, 1409 flow [2024-06-14 13:31:45,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1409, PETRI_PLACES=116, PETRI_TRANSITIONS=142} [2024-06-14 13:31:45,623 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2024-06-14 13:31:45,624 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 142 transitions, 1409 flow [2024-06-14 13:31:45,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:45,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:45,624 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 13:31:45,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:31:45,625 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 13:31:45,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:45,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1017574599, now seen corresponding path program 4 times [2024-06-14 13:31:45,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:45,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981357661] [2024-06-14 13:31:45,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:45,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:49,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:49,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981357661] [2024-06-14 13:31:49,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981357661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:49,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:49,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:49,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796939686] [2024-06-14 13:31:49,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:49,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:49,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:49,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:49,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:49,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:31:49,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 142 transitions, 1409 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:49,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:49,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:31:49,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:52,195 INFO L124 PetriNetUnfolderBase]: 7425/10781 cut-off events. [2024-06-14 13:31:52,196 INFO L125 PetriNetUnfolderBase]: For 139855/139855 co-relation queries the response was YES. [2024-06-14 13:31:52,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54922 conditions, 10781 events. 7425/10781 cut-off events. For 139855/139855 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 62231 event pairs, 2790 based on Foata normal form. 24/10800 useless extension candidates. Maximal degree in co-relation 54873. Up to 9976 conditions per place. [2024-06-14 13:31:52,271 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 143 selfloop transitions, 50 changer transitions 0/200 dead transitions. [2024-06-14 13:31:52,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 200 transitions, 2031 flow [2024-06-14 13:31:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:52,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 13:31:52,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740566037735849 [2024-06-14 13:31:52,273 INFO L175 Difference]: Start difference. First operand has 116 places, 142 transitions, 1409 flow. Second operand 8 states and 201 transitions. [2024-06-14 13:31:52,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 200 transitions, 2031 flow [2024-06-14 13:31:52,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 200 transitions, 1900 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:52,430 INFO L231 Difference]: Finished difference. Result has 119 places, 144 transitions, 1444 flow [2024-06-14 13:31:52,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1444, PETRI_PLACES=119, PETRI_TRANSITIONS=144} [2024-06-14 13:31:52,430 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-14 13:31:52,430 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 144 transitions, 1444 flow [2024-06-14 13:31:52,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:52,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:52,431 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 13:31:52,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:31:52,431 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 13:31:52,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:52,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1703039459, now seen corresponding path program 2 times [2024-06-14 13:31:52,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:52,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311152909] [2024-06-14 13:31:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:52,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:55,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:55,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311152909] [2024-06-14 13:31:55,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311152909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:55,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:55,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:55,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318043938] [2024-06-14 13:31:55,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:55,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:55,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:55,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:55,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:31:55,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 144 transitions, 1444 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:55,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:55,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:31:55,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:58,404 INFO L124 PetriNetUnfolderBase]: 7537/10957 cut-off events. [2024-06-14 13:31:58,404 INFO L125 PetriNetUnfolderBase]: For 155183/155183 co-relation queries the response was YES. [2024-06-14 13:31:58,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56631 conditions, 10957 events. 7537/10957 cut-off events. For 155183/155183 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 63408 event pairs, 2790 based on Foata normal form. 18/10970 useless extension candidates. Maximal degree in co-relation 56581. Up to 9958 conditions per place. [2024-06-14 13:31:58,487 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 146 selfloop transitions, 53 changer transitions 0/206 dead transitions. [2024-06-14 13:31:58,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 206 transitions, 2098 flow [2024-06-14 13:31:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 13:31:58,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-14 13:31:58,490 INFO L175 Difference]: Start difference. First operand has 119 places, 144 transitions, 1444 flow. Second operand 8 states and 204 transitions. [2024-06-14 13:31:58,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 206 transitions, 2098 flow [2024-06-14 13:31:58,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 206 transitions, 1970 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:58,632 INFO L231 Difference]: Finished difference. Result has 121 places, 146 transitions, 1491 flow [2024-06-14 13:31:58,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1491, PETRI_PLACES=121, PETRI_TRANSITIONS=146} [2024-06-14 13:31:58,632 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-14 13:31:58,633 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 146 transitions, 1491 flow [2024-06-14 13:31:58,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:58,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:58,633 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 13:31:58,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:31:58,633 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 13:31:58,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:58,634 INFO L85 PathProgramCache]: Analyzing trace with hash -417608399, now seen corresponding path program 3 times [2024-06-14 13:31:58,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:58,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049062752] [2024-06-14 13:31:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:58,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:01,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:01,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049062752] [2024-06-14 13:32:01,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049062752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:01,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:01,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:32:01,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548568116] [2024-06-14 13:32:01,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:01,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:32:01,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:01,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:32:01,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:32:01,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:01,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 146 transitions, 1491 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:01,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:01,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:01,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:04,324 INFO L124 PetriNetUnfolderBase]: 7498/10916 cut-off events. [2024-06-14 13:32:04,324 INFO L125 PetriNetUnfolderBase]: For 161724/161724 co-relation queries the response was YES. [2024-06-14 13:32:04,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56662 conditions, 10916 events. 7498/10916 cut-off events. For 161724/161724 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 62496 event pairs, 2483 based on Foata normal form. 18/10929 useless extension candidates. Maximal degree in co-relation 56611. Up to 9039 conditions per place. [2024-06-14 13:32:04,401 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 130 selfloop transitions, 69 changer transitions 0/206 dead transitions. [2024-06-14 13:32:04,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 206 transitions, 2099 flow [2024-06-14 13:32:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:32:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:32:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 13:32:04,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-14 13:32:04,403 INFO L175 Difference]: Start difference. First operand has 121 places, 146 transitions, 1491 flow. Second operand 8 states and 203 transitions. [2024-06-14 13:32:04,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 206 transitions, 2099 flow [2024-06-14 13:32:04,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 206 transitions, 1954 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:04,554 INFO L231 Difference]: Finished difference. Result has 122 places, 147 transitions, 1515 flow [2024-06-14 13:32:04,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1515, PETRI_PLACES=122, PETRI_TRANSITIONS=147} [2024-06-14 13:32:04,554 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-14 13:32:04,554 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 147 transitions, 1515 flow [2024-06-14 13:32:04,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:04,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:04,555 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 13:32:04,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:32:04,555 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 13:32:04,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:04,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1268354946, now seen corresponding path program 1 times [2024-06-14 13:32:04,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:04,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344655486] [2024-06-14 13:32:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:04,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:06,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:06,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344655486] [2024-06-14 13:32:06,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344655486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:06,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:06,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:32:06,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78406783] [2024-06-14 13:32:06,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:06,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:32:06,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:06,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:32:06,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:32:06,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:06,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 147 transitions, 1515 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 13:32:06,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:06,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:06,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:09,251 INFO L124 PetriNetUnfolderBase]: 7536/10967 cut-off events. [2024-06-14 13:32:09,252 INFO L125 PetriNetUnfolderBase]: For 174609/174609 co-relation queries the response was YES. [2024-06-14 13:32:09,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57828 conditions, 10967 events. 7536/10967 cut-off events. For 174609/174609 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 63620 event pairs, 2773 based on Foata normal form. 4/10968 useless extension candidates. Maximal degree in co-relation 57776. Up to 10486 conditions per place. [2024-06-14 13:32:09,324 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 159 selfloop transitions, 21 changer transitions 0/187 dead transitions. [2024-06-14 13:32:09,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 187 transitions, 2167 flow [2024-06-14 13:32:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:32:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:32:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 13:32:09,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2024-06-14 13:32:09,326 INFO L175 Difference]: Start difference. First operand has 122 places, 147 transitions, 1515 flow. Second operand 6 states and 148 transitions. [2024-06-14 13:32:09,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 187 transitions, 2167 flow [2024-06-14 13:32:09,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 187 transitions, 1986 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:09,491 INFO L231 Difference]: Finished difference. Result has 122 places, 155 transitions, 1517 flow [2024-06-14 13:32:09,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1517, PETRI_PLACES=122, PETRI_TRANSITIONS=155} [2024-06-14 13:32:09,492 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-14 13:32:09,492 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 155 transitions, 1517 flow [2024-06-14 13:32:09,492 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 13:32:09,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:09,492 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 13:32:09,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:32:09,492 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 13:32:09,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:09,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1213919256, now seen corresponding path program 2 times [2024-06-14 13:32:09,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:09,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989790360] [2024-06-14 13:32:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:09,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:11,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:11,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989790360] [2024-06-14 13:32:11,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989790360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:11,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:11,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:32:11,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612446585] [2024-06-14 13:32:11,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:11,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:32:11,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:11,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:32:11,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:32:11,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:11,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 155 transitions, 1517 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 13:32:11,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:11,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:11,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:13,727 INFO L124 PetriNetUnfolderBase]: 7522/10947 cut-off events. [2024-06-14 13:32:13,727 INFO L125 PetriNetUnfolderBase]: For 184709/184709 co-relation queries the response was YES. [2024-06-14 13:32:13,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58787 conditions, 10947 events. 7522/10947 cut-off events. For 184709/184709 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 63384 event pairs, 2769 based on Foata normal form. 4/10948 useless extension candidates. Maximal degree in co-relation 58734. Up to 10496 conditions per place. [2024-06-14 13:32:13,808 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 155 selfloop transitions, 17 changer transitions 0/179 dead transitions. [2024-06-14 13:32:13,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 179 transitions, 1929 flow [2024-06-14 13:32:13,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:32:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:32:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 13:32:13,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-14 13:32:13,810 INFO L175 Difference]: Start difference. First operand has 122 places, 155 transitions, 1517 flow. Second operand 5 states and 125 transitions. [2024-06-14 13:32:13,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 179 transitions, 1929 flow [2024-06-14 13:32:14,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 179 transitions, 1825 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-14 13:32:14,048 INFO L231 Difference]: Finished difference. Result has 125 places, 155 transitions, 1461 flow [2024-06-14 13:32:14,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1461, PETRI_PLACES=125, PETRI_TRANSITIONS=155} [2024-06-14 13:32:14,049 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-14 13:32:14,049 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 155 transitions, 1461 flow [2024-06-14 13:32:14,049 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 13:32:14,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:14,049 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 13:32:14,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:32:14,049 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 13:32:14,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:14,050 INFO L85 PathProgramCache]: Analyzing trace with hash 976058571, now seen corresponding path program 1 times [2024-06-14 13:32:14,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:14,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39549141] [2024-06-14 13:32:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:14,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:17,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:17,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39549141] [2024-06-14 13:32:17,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39549141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:17,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:17,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:32:17,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72922963] [2024-06-14 13:32:17,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:17,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:32:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:32:17,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:32:17,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 13:32:17,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 155 transitions, 1461 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:17,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:17,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 13:32:17,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:19,377 INFO L124 PetriNetUnfolderBase]: 7091/10460 cut-off events. [2024-06-14 13:32:19,377 INFO L125 PetriNetUnfolderBase]: For 191496/191516 co-relation queries the response was YES. [2024-06-14 13:32:19,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56361 conditions, 10460 events. 7091/10460 cut-off events. For 191496/191516 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 62117 event pairs, 2716 based on Foata normal form. 4/10415 useless extension candidates. Maximal degree in co-relation 56306. Up to 9853 conditions per place. [2024-06-14 13:32:19,457 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 146 selfloop transitions, 12 changer transitions 0/178 dead transitions. [2024-06-14 13:32:19,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 178 transitions, 1889 flow [2024-06-14 13:32:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:32:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:32:19,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-14 13:32:19,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-14 13:32:19,459 INFO L175 Difference]: Start difference. First operand has 125 places, 155 transitions, 1461 flow. Second operand 5 states and 123 transitions. [2024-06-14 13:32:19,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 178 transitions, 1889 flow [2024-06-14 13:32:19,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 178 transitions, 1855 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:32:19,638 INFO L231 Difference]: Finished difference. Result has 126 places, 158 transitions, 1521 flow [2024-06-14 13:32:19,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1521, PETRI_PLACES=126, PETRI_TRANSITIONS=158} [2024-06-14 13:32:19,639 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 70 predicate places. [2024-06-14 13:32:19,639 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 158 transitions, 1521 flow [2024-06-14 13:32:19,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:19,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:19,640 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 13:32:19,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:32:19,640 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 13:32:19,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:19,640 INFO L85 PathProgramCache]: Analyzing trace with hash -320762185, now seen corresponding path program 1 times [2024-06-14 13:32:19,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:19,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184197036] [2024-06-14 13:32:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:19,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:22,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:22,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184197036] [2024-06-14 13:32:22,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184197036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:22,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:22,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:32:22,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164314004] [2024-06-14 13:32:22,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:22,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:32:22,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:22,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:32:22,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:32:22,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:22,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 158 transitions, 1521 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 13:32:22,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:22,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:22,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:25,843 INFO L124 PetriNetUnfolderBase]: 7600/11073 cut-off events. [2024-06-14 13:32:25,843 INFO L125 PetriNetUnfolderBase]: For 214120/214120 co-relation queries the response was YES. [2024-06-14 13:32:25,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61344 conditions, 11073 events. 7600/11073 cut-off events. For 214120/214120 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 64284 event pairs, 2743 based on Foata normal form. 4/11072 useless extension candidates. Maximal degree in co-relation 61288. Up to 10301 conditions per place. [2024-06-14 13:32:25,940 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 154 selfloop transitions, 58 changer transitions 0/219 dead transitions. [2024-06-14 13:32:25,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 219 transitions, 2491 flow [2024-06-14 13:32:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:32:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:32:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 13:32:25,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 13:32:25,943 INFO L175 Difference]: Start difference. First operand has 126 places, 158 transitions, 1521 flow. Second operand 7 states and 182 transitions. [2024-06-14 13:32:25,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 219 transitions, 2491 flow [2024-06-14 13:32:26,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 219 transitions, 2421 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 13:32:26,155 INFO L231 Difference]: Finished difference. Result has 130 places, 170 transitions, 1808 flow [2024-06-14 13:32:26,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1808, PETRI_PLACES=130, PETRI_TRANSITIONS=170} [2024-06-14 13:32:26,156 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-14 13:32:26,156 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 170 transitions, 1808 flow [2024-06-14 13:32:26,156 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 13:32:26,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:26,156 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 13:32:26,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:32:26,156 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 13:32:26,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:26,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1075846501, now seen corresponding path program 2 times [2024-06-14 13:32:26,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:26,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262440245] [2024-06-14 13:32:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:26,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:29,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:29,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262440245] [2024-06-14 13:32:29,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262440245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:29,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:29,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:32:29,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959198005] [2024-06-14 13:32:29,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:29,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:32:29,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:29,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:32:29,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:32:29,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:29,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 170 transitions, 1808 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 13:32:29,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:29,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:29,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:32,264 INFO L124 PetriNetUnfolderBase]: 7752/11304 cut-off events. [2024-06-14 13:32:32,264 INFO L125 PetriNetUnfolderBase]: For 236268/236268 co-relation queries the response was YES. [2024-06-14 13:32:32,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64844 conditions, 11304 events. 7752/11304 cut-off events. For 236268/236268 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 65802 event pairs, 2608 based on Foata normal form. 4/11306 useless extension candidates. Maximal degree in co-relation 64787. Up to 10594 conditions per place. [2024-06-14 13:32:32,369 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 180 selfloop transitions, 41 changer transitions 0/228 dead transitions. [2024-06-14 13:32:32,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 228 transitions, 2561 flow [2024-06-14 13:32:32,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:32:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:32:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 13:32:32,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46900269541778977 [2024-06-14 13:32:32,371 INFO L175 Difference]: Start difference. First operand has 130 places, 170 transitions, 1808 flow. Second operand 7 states and 174 transitions. [2024-06-14 13:32:32,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 228 transitions, 2561 flow [2024-06-14 13:32:32,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 228 transitions, 2448 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-14 13:32:32,689 INFO L231 Difference]: Finished difference. Result has 135 places, 185 transitions, 1985 flow [2024-06-14 13:32:32,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1985, PETRI_PLACES=135, PETRI_TRANSITIONS=185} [2024-06-14 13:32:32,690 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-14 13:32:32,690 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 185 transitions, 1985 flow [2024-06-14 13:32:32,690 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 13:32:32,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:32,690 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 13:32:32,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:32:32,691 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 13:32:32,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:32,691 INFO L85 PathProgramCache]: Analyzing trace with hash -121460395, now seen corresponding path program 3 times [2024-06-14 13:32:32,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:32,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955163916] [2024-06-14 13:32:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:32,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:35,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:35,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955163916] [2024-06-14 13:32:35,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955163916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:35,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:35,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:32:35,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678427375] [2024-06-14 13:32:35,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:35,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:32:35,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:35,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:32:35,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:32:35,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:35,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 185 transitions, 1985 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 13:32:35,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:35,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:35,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:38,459 INFO L124 PetriNetUnfolderBase]: 7790/11359 cut-off events. [2024-06-14 13:32:38,459 INFO L125 PetriNetUnfolderBase]: For 249467/249484 co-relation queries the response was YES. [2024-06-14 13:32:38,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65505 conditions, 11359 events. 7790/11359 cut-off events. For 249467/249484 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 66101 event pairs, 2732 based on Foata normal form. 18/11372 useless extension candidates. Maximal degree in co-relation 65446. Up to 10491 conditions per place. [2024-06-14 13:32:38,548 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 161 selfloop transitions, 68 changer transitions 0/236 dead transitions. [2024-06-14 13:32:38,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 236 transitions, 2859 flow [2024-06-14 13:32:38,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:32:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:32:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 13:32:38,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-14 13:32:38,550 INFO L175 Difference]: Start difference. First operand has 135 places, 185 transitions, 1985 flow. Second operand 7 states and 178 transitions. [2024-06-14 13:32:38,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 236 transitions, 2859 flow [2024-06-14 13:32:38,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 236 transitions, 2754 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 13:32:38,905 INFO L231 Difference]: Finished difference. Result has 139 places, 189 transitions, 2102 flow [2024-06-14 13:32:38,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2102, PETRI_PLACES=139, PETRI_TRANSITIONS=189} [2024-06-14 13:32:38,906 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-14 13:32:38,906 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 189 transitions, 2102 flow [2024-06-14 13:32:38,906 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 13:32:38,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:38,907 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 13:32:38,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:32:38,907 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 13:32:38,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:38,907 INFO L85 PathProgramCache]: Analyzing trace with hash -110984875, now seen corresponding path program 4 times [2024-06-14 13:32:38,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:38,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251711315] [2024-06-14 13:32:38,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:38,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:41,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:41,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251711315] [2024-06-14 13:32:41,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251711315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:41,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:41,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:32:41,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676668158] [2024-06-14 13:32:41,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:41,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:32:41,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:41,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:32:41,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:32:41,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:41,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 189 transitions, 2102 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 13:32:41,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:41,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:41,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:44,447 INFO L124 PetriNetUnfolderBase]: 7828/11409 cut-off events. [2024-06-14 13:32:44,448 INFO L125 PetriNetUnfolderBase]: For 263931/263948 co-relation queries the response was YES. [2024-06-14 13:32:44,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66542 conditions, 11409 events. 7828/11409 cut-off events. For 263931/263948 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 66462 event pairs, 2732 based on Foata normal form. 18/11422 useless extension candidates. Maximal degree in co-relation 66482. Up to 10525 conditions per place. [2024-06-14 13:32:44,537 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 152 selfloop transitions, 74 changer transitions 0/233 dead transitions. [2024-06-14 13:32:44,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 233 transitions, 2858 flow [2024-06-14 13:32:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:32:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:32:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 13:32:44,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636118598382749 [2024-06-14 13:32:44,539 INFO L175 Difference]: Start difference. First operand has 139 places, 189 transitions, 2102 flow. Second operand 7 states and 172 transitions. [2024-06-14 13:32:44,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 233 transitions, 2858 flow [2024-06-14 13:32:44,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 233 transitions, 2620 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:44,878 INFO L231 Difference]: Finished difference. Result has 140 places, 193 transitions, 2105 flow [2024-06-14 13:32:44,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2105, PETRI_PLACES=140, PETRI_TRANSITIONS=193} [2024-06-14 13:32:44,882 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 84 predicate places. [2024-06-14 13:32:44,883 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 193 transitions, 2105 flow [2024-06-14 13:32:44,883 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 13:32:44,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:44,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:44,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:32:44,883 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 13:32:44,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:44,884 INFO L85 PathProgramCache]: Analyzing trace with hash 180644945, now seen corresponding path program 5 times [2024-06-14 13:32:44,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:44,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086083736] [2024-06-14 13:32:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:44,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:48,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:48,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086083736] [2024-06-14 13:32:48,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086083736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:48,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:48,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:32:48,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27858093] [2024-06-14 13:32:48,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:48,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:32:48,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:48,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:32:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:32:48,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:48,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 193 transitions, 2105 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 13:32:48,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:48,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:48,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:51,084 INFO L124 PetriNetUnfolderBase]: 7814/11386 cut-off events. [2024-06-14 13:32:51,085 INFO L125 PetriNetUnfolderBase]: For 273667/273667 co-relation queries the response was YES. [2024-06-14 13:32:51,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66489 conditions, 11386 events. 7814/11386 cut-off events. For 273667/273667 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 66234 event pairs, 2612 based on Foata normal form. 4/11388 useless extension candidates. Maximal degree in co-relation 66429. Up to 10449 conditions per place. [2024-06-14 13:32:51,185 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 167 selfloop transitions, 82 changer transitions 0/256 dead transitions. [2024-06-14 13:32:51,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 256 transitions, 2899 flow [2024-06-14 13:32:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:32:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:32:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 13:32:51,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-14 13:32:51,187 INFO L175 Difference]: Start difference. First operand has 140 places, 193 transitions, 2105 flow. Second operand 8 states and 211 transitions. [2024-06-14 13:32:51,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 256 transitions, 2899 flow [2024-06-14 13:32:51,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 256 transitions, 2692 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-14 13:32:51,570 INFO L231 Difference]: Finished difference. Result has 144 places, 193 transitions, 2105 flow [2024-06-14 13:32:51,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2105, PETRI_PLACES=144, PETRI_TRANSITIONS=193} [2024-06-14 13:32:51,571 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 88 predicate places. [2024-06-14 13:32:51,571 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 193 transitions, 2105 flow [2024-06-14 13:32:51,571 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 13:32:51,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:51,571 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 13:32:51,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:32:51,572 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 13:32:51,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:51,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1654757255, now seen corresponding path program 6 times [2024-06-14 13:32:51,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:51,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090076058] [2024-06-14 13:32:51,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:51,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:54,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:54,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090076058] [2024-06-14 13:32:54,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090076058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:54,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:54,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:32:54,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115101868] [2024-06-14 13:32:54,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:54,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:32:54,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:54,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:32:54,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:32:54,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:32:54,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 193 transitions, 2105 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 13:32:54,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:54,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:32:54,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:57,234 INFO L124 PetriNetUnfolderBase]: 7800/11362 cut-off events. [2024-06-14 13:32:57,235 INFO L125 PetriNetUnfolderBase]: For 287098/287104 co-relation queries the response was YES. [2024-06-14 13:32:57,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66804 conditions, 11362 events. 7800/11362 cut-off events. For 287098/287104 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 66096 event pairs, 2687 based on Foata normal form. 4/11358 useless extension candidates. Maximal degree in co-relation 66743. Up to 10437 conditions per place. [2024-06-14 13:32:57,334 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 143 selfloop transitions, 80 changer transitions 0/230 dead transitions. [2024-06-14 13:32:57,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 230 transitions, 2667 flow [2024-06-14 13:32:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:32:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:32:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 13:32:57,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2024-06-14 13:32:57,337 INFO L175 Difference]: Start difference. First operand has 144 places, 193 transitions, 2105 flow. Second operand 6 states and 155 transitions. [2024-06-14 13:32:57,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 230 transitions, 2667 flow [2024-06-14 13:32:57,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 230 transitions, 2386 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-14 13:32:57,698 INFO L231 Difference]: Finished difference. Result has 141 places, 193 transitions, 2002 flow [2024-06-14 13:32:57,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2002, PETRI_PLACES=141, PETRI_TRANSITIONS=193} [2024-06-14 13:32:57,699 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-14 13:32:57,699 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 193 transitions, 2002 flow [2024-06-14 13:32:57,699 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 13:32:57,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:57,699 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 13:32:57,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:32:57,700 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 13:32:57,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:57,700 INFO L85 PathProgramCache]: Analyzing trace with hash -113833899, now seen corresponding path program 1 times [2024-06-14 13:32:57,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:57,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347301697] [2024-06-14 13:32:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:57,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:00,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:00,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347301697] [2024-06-14 13:33:00,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347301697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:00,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:00,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:33:00,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069031469] [2024-06-14 13:33:00,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:00,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:33:00,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:00,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:33:00,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:33:00,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:33:00,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 193 transitions, 2002 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 13:33:00,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:00,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:33:00,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:02,880 INFO L124 PetriNetUnfolderBase]: 8032/11702 cut-off events. [2024-06-14 13:33:02,881 INFO L125 PetriNetUnfolderBase]: For 288440/288440 co-relation queries the response was YES. [2024-06-14 13:33:02,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68390 conditions, 11702 events. 8032/11702 cut-off events. For 288440/288440 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 68364 event pairs, 2659 based on Foata normal form. 16/11715 useless extension candidates. Maximal degree in co-relation 68329. Up to 10808 conditions per place. [2024-06-14 13:33:02,980 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 212 selfloop transitions, 27 changer transitions 0/246 dead transitions. [2024-06-14 13:33:02,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 246 transitions, 2858 flow [2024-06-14 13:33:02,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:33:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:33:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 13:33:02,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-14 13:33:02,982 INFO L175 Difference]: Start difference. First operand has 141 places, 193 transitions, 2002 flow. Second operand 7 states and 177 transitions. [2024-06-14 13:33:02,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 246 transitions, 2858 flow [2024-06-14 13:33:03,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 246 transitions, 2681 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:33:03,345 INFO L231 Difference]: Finished difference. Result has 142 places, 197 transitions, 2002 flow [2024-06-14 13:33:03,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2002, PETRI_PLACES=142, PETRI_TRANSITIONS=197} [2024-06-14 13:33:03,345 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-06-14 13:33:03,345 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 197 transitions, 2002 flow [2024-06-14 13:33:03,346 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 13:33:03,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:03,346 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 13:33:03,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:33:03,346 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 13:33:03,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:03,347 INFO L85 PathProgramCache]: Analyzing trace with hash -110976939, now seen corresponding path program 2 times [2024-06-14 13:33:03,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:03,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489671133] [2024-06-14 13:33:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:03,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:05,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:05,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489671133] [2024-06-14 13:33:05,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489671133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:05,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:05,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:33:05,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313741890] [2024-06-14 13:33:05,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:05,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:33:05,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:05,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:33:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:33:05,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:33:05,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 197 transitions, 2002 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 13:33:05,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:05,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:33:05,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:09,141 INFO L124 PetriNetUnfolderBase]: 8180/11917 cut-off events. [2024-06-14 13:33:09,142 INFO L125 PetriNetUnfolderBase]: For 296715/296715 co-relation queries the response was YES. [2024-06-14 13:33:09,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70007 conditions, 11917 events. 8180/11917 cut-off events. For 296715/296715 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 69855 event pairs, 2807 based on Foata normal form. 20/11934 useless extension candidates. Maximal degree in co-relation 69946. Up to 11230 conditions per place. [2024-06-14 13:33:09,229 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 209 selfloop transitions, 23 changer transitions 0/239 dead transitions. [2024-06-14 13:33:09,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 239 transitions, 2654 flow [2024-06-14 13:33:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:33:09,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:33:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:33:09,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555256064690027 [2024-06-14 13:33:09,253 INFO L175 Difference]: Start difference. First operand has 142 places, 197 transitions, 2002 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:33:09,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 239 transitions, 2654 flow [2024-06-14 13:33:09,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 239 transitions, 2591 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 13:33:09,653 INFO L231 Difference]: Finished difference. Result has 146 places, 199 transitions, 2055 flow [2024-06-14 13:33:09,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1941, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2055, PETRI_PLACES=146, PETRI_TRANSITIONS=199} [2024-06-14 13:33:09,654 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-06-14 13:33:09,654 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 199 transitions, 2055 flow [2024-06-14 13:33:09,654 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 13:33:09,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:09,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:33:09,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:33:09,655 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 13:33:09,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:09,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1654765191, now seen corresponding path program 3 times [2024-06-14 13:33:09,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:09,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384544940] [2024-06-14 13:33:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:09,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:12,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:12,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384544940] [2024-06-14 13:33:12,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384544940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:12,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:12,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:33:12,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504047057] [2024-06-14 13:33:12,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:12,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:33:12,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:33:12,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:33:12,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:33:12,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 199 transitions, 2055 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 13:33:12,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:12,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:33:12,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:14,907 INFO L124 PetriNetUnfolderBase]: 8124/11822 cut-off events. [2024-06-14 13:33:14,907 INFO L125 PetriNetUnfolderBase]: For 301694/301694 co-relation queries the response was YES. [2024-06-14 13:33:14,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69394 conditions, 11822 events. 8124/11822 cut-off events. For 301694/301694 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 68856 event pairs, 2677 based on Foata normal form. 20/11839 useless extension candidates. Maximal degree in co-relation 69331. Up to 11138 conditions per place. [2024-06-14 13:33:14,989 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 208 selfloop transitions, 22 changer transitions 0/237 dead transitions. [2024-06-14 13:33:14,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 237 transitions, 2641 flow [2024-06-14 13:33:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:33:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:33:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 13:33:14,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-14 13:33:14,992 INFO L175 Difference]: Start difference. First operand has 146 places, 199 transitions, 2055 flow. Second operand 6 states and 153 transitions. [2024-06-14 13:33:14,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 237 transitions, 2641 flow [2024-06-14 13:33:15,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 237 transitions, 2551 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 13:33:15,356 INFO L231 Difference]: Finished difference. Result has 147 places, 199 transitions, 2021 flow [2024-06-14 13:33:15,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2021, PETRI_PLACES=147, PETRI_TRANSITIONS=199} [2024-06-14 13:33:15,356 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-06-14 13:33:15,356 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 199 transitions, 2021 flow [2024-06-14 13:33:15,357 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 13:33:15,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:15,357 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 13:33:15,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:33:15,357 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:33:15,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:15,357 INFO L85 PathProgramCache]: Analyzing trace with hash 802513923, now seen corresponding path program 1 times [2024-06-14 13:33:15,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:15,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61960611] [2024-06-14 13:33:15,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:15,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:17,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:17,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61960611] [2024-06-14 13:33:17,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61960611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:17,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:17,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:33:17,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143527893] [2024-06-14 13:33:17,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:17,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:33:17,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:33:17,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:33:17,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 13:33:17,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 199 transitions, 2021 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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 13:33:17,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:17,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 13:33:17,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:19,622 INFO L124 PetriNetUnfolderBase]: 7290/10882 cut-off events. [2024-06-14 13:33:19,622 INFO L125 PetriNetUnfolderBase]: For 302303/302641 co-relation queries the response was YES. [2024-06-14 13:33:19,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63603 conditions, 10882 events. 7290/10882 cut-off events. For 302303/302641 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 67044 event pairs, 2659 based on Foata normal form. 4/10657 useless extension candidates. Maximal degree in co-relation 63539. Up to 9913 conditions per place. [2024-06-14 13:33:19,735 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 156 selfloop transitions, 13 changer transitions 0/222 dead transitions. [2024-06-14 13:33:19,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 222 transitions, 2467 flow [2024-06-14 13:33:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:33:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:33:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-14 13:33:19,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45660377358490567 [2024-06-14 13:33:19,737 INFO L175 Difference]: Start difference. First operand has 147 places, 199 transitions, 2021 flow. Second operand 5 states and 121 transitions. [2024-06-14 13:33:19,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 222 transitions, 2467 flow [2024-06-14 13:33:20,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 222 transitions, 2409 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:33:20,088 INFO L231 Difference]: Finished difference. Result has 148 places, 207 transitions, 2085 flow [2024-06-14 13:33:20,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1969, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2085, PETRI_PLACES=148, PETRI_TRANSITIONS=207} [2024-06-14 13:33:20,088 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-14 13:33:20,088 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 207 transitions, 2085 flow [2024-06-14 13:33:20,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 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 13:33:20,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:20,089 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 13:33:20,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:33:20,089 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 13:33:20,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:20,089 INFO L85 PathProgramCache]: Analyzing trace with hash -147572575, now seen corresponding path program 1 times [2024-06-14 13:33:20,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:20,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489611722] [2024-06-14 13:33:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:20,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:24,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489611722] [2024-06-14 13:33:24,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489611722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:24,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:24,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:24,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012884844] [2024-06-14 13:33:24,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:24,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:24,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:24,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:24,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:24,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:33:24,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 207 transitions, 2085 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 13:33:24,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:24,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:33:24,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:27,719 INFO L124 PetriNetUnfolderBase]: 8146/11970 cut-off events. [2024-06-14 13:33:27,719 INFO L125 PetriNetUnfolderBase]: For 317018/317018 co-relation queries the response was YES. [2024-06-14 13:33:27,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71429 conditions, 11970 events. 8146/11970 cut-off events. For 317018/317018 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 71205 event pairs, 2728 based on Foata normal form. 4/11972 useless extension candidates. Maximal degree in co-relation 71363. Up to 11107 conditions per place. [2024-06-14 13:33:27,815 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 210 selfloop transitions, 52 changer transitions 0/269 dead transitions. [2024-06-14 13:33:27,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 269 transitions, 2865 flow [2024-06-14 13:33:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:33:27,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:33:27,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 13:33:27,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-06-14 13:33:27,817 INFO L175 Difference]: Start difference. First operand has 148 places, 207 transitions, 2085 flow. Second operand 8 states and 206 transitions. [2024-06-14 13:33:27,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 269 transitions, 2865 flow [2024-06-14 13:33:28,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 269 transitions, 2839 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-14 13:33:28,167 INFO L231 Difference]: Finished difference. Result has 155 places, 211 transitions, 2258 flow [2024-06-14 13:33:28,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2258, PETRI_PLACES=155, PETRI_TRANSITIONS=211} [2024-06-14 13:33:28,168 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 99 predicate places. [2024-06-14 13:33:28,168 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 211 transitions, 2258 flow [2024-06-14 13:33:28,168 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 13:33:28,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:28,168 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 13:33:28,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:33:28,169 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 13:33:28,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash -289790965, now seen corresponding path program 2 times [2024-06-14 13:33:28,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:28,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407266200] [2024-06-14 13:33:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:28,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:32,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:32,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407266200] [2024-06-14 13:33:32,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407266200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:32,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:32,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:32,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258672218] [2024-06-14 13:33:32,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:32,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:32,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:32,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:32,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:33:32,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 211 transitions, 2258 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 13:33:32,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:32,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:33:32,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:35,508 INFO L124 PetriNetUnfolderBase]: 8236/12009 cut-off events. [2024-06-14 13:33:35,508 INFO L125 PetriNetUnfolderBase]: For 344679/344679 co-relation queries the response was YES. [2024-06-14 13:33:35,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75099 conditions, 12009 events. 8236/12009 cut-off events. For 344679/344679 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 70754 event pairs, 2609 based on Foata normal form. 4/12007 useless extension candidates. Maximal degree in co-relation 75030. Up to 10703 conditions per place. [2024-06-14 13:33:35,604 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 167 selfloop transitions, 109 changer transitions 0/283 dead transitions. [2024-06-14 13:33:35,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 283 transitions, 3494 flow [2024-06-14 13:33:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:33:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:33:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-14 13:33:35,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49528301886792453 [2024-06-14 13:33:35,606 INFO L175 Difference]: Start difference. First operand has 155 places, 211 transitions, 2258 flow. Second operand 8 states and 210 transitions. [2024-06-14 13:33:35,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 283 transitions, 3494 flow [2024-06-14 13:33:36,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 283 transitions, 3325 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 13:33:36,052 INFO L231 Difference]: Finished difference. Result has 157 places, 223 transitions, 2582 flow [2024-06-14 13:33:36,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2582, PETRI_PLACES=157, PETRI_TRANSITIONS=223} [2024-06-14 13:33:36,052 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 101 predicate places. [2024-06-14 13:33:36,052 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 223 transitions, 2582 flow [2024-06-14 13:33:36,053 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 13:33:36,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:36,053 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 13:33:36,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:33:36,053 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 13:33:36,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:36,054 INFO L85 PathProgramCache]: Analyzing trace with hash -847709701, now seen corresponding path program 3 times [2024-06-14 13:33:36,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:36,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525016131] [2024-06-14 13:33:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:36,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:40,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:40,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525016131] [2024-06-14 13:33:40,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525016131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:40,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:40,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:40,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957566206] [2024-06-14 13:33:40,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:40,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:40,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:33:40,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 223 transitions, 2582 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 13:33:40,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:40,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:33:40,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:43,710 INFO L124 PetriNetUnfolderBase]: 8274/12065 cut-off events. [2024-06-14 13:33:43,711 INFO L125 PetriNetUnfolderBase]: For 374225/374225 co-relation queries the response was YES. [2024-06-14 13:33:43,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78124 conditions, 12065 events. 8274/12065 cut-off events. For 374225/374225 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 71086 event pairs, 2609 based on Foata normal form. 4/12064 useless extension candidates. Maximal degree in co-relation 78054. Up to 10737 conditions per place. [2024-06-14 13:33:43,842 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 164 selfloop transitions, 112 changer transitions 0/283 dead transitions. [2024-06-14 13:33:43,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 283 transitions, 3650 flow [2024-06-14 13:33:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:33:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:33:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 13:33:43,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-06-14 13:33:43,844 INFO L175 Difference]: Start difference. First operand has 157 places, 223 transitions, 2582 flow. Second operand 8 states and 206 transitions. [2024-06-14 13:33:43,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 283 transitions, 3650 flow [2024-06-14 13:33:44,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 283 transitions, 3460 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-14 13:33:44,397 INFO L231 Difference]: Finished difference. Result has 162 places, 227 transitions, 2719 flow [2024-06-14 13:33:44,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2719, PETRI_PLACES=162, PETRI_TRANSITIONS=227} [2024-06-14 13:33:44,398 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-06-14 13:33:44,398 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 227 transitions, 2719 flow [2024-06-14 13:33:44,398 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 13:33:44,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:44,398 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 13:33:44,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:33:44,398 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 13:33:44,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:44,399 INFO L85 PathProgramCache]: Analyzing trace with hash -141912595, now seen corresponding path program 4 times [2024-06-14 13:33:44,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:44,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779700447] [2024-06-14 13:33:44,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:44,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:47,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779700447] [2024-06-14 13:33:47,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779700447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:47,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:47,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:47,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82784008] [2024-06-14 13:33:47,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:47,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:47,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:47,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:47,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:33:47,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 227 transitions, 2719 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 13:33:47,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:47,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:33:47,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:51,113 INFO L124 PetriNetUnfolderBase]: 8312/12148 cut-off events. [2024-06-14 13:33:51,114 INFO L125 PetriNetUnfolderBase]: For 390815/390815 co-relation queries the response was YES. [2024-06-14 13:33:51,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79397 conditions, 12148 events. 8312/12148 cut-off events. For 390815/390815 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 71775 event pairs, 2640 based on Foata normal form. 4/12150 useless extension candidates. Maximal degree in co-relation 79325. Up to 11338 conditions per place. [2024-06-14 13:33:51,219 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 224 selfloop transitions, 48 changer transitions 0/279 dead transitions. [2024-06-14 13:33:51,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 279 transitions, 3498 flow [2024-06-14 13:33:51,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:33:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:33:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 13:33:51,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45990566037735847 [2024-06-14 13:33:51,227 INFO L175 Difference]: Start difference. First operand has 162 places, 227 transitions, 2719 flow. Second operand 8 states and 195 transitions. [2024-06-14 13:33:51,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 279 transitions, 3498 flow [2024-06-14 13:33:51,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 279 transitions, 3306 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 13:33:51,957 INFO L231 Difference]: Finished difference. Result has 166 places, 231 transitions, 2722 flow [2024-06-14 13:33:51,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2722, PETRI_PLACES=166, PETRI_TRANSITIONS=231} [2024-06-14 13:33:51,958 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 110 predicate places. [2024-06-14 13:33:51,958 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 231 transitions, 2722 flow [2024-06-14 13:33:51,958 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 13:33:51,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:51,958 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 13:33:51,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:33:51,959 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 13:33:51,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:51,959 INFO L85 PathProgramCache]: Analyzing trace with hash -699884434, now seen corresponding path program 1 times [2024-06-14 13:33:51,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:51,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153533294] [2024-06-14 13:33:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:51,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:56,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:56,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153533294] [2024-06-14 13:33:56,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153533294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:56,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:56,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:33:56,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46689331] [2024-06-14 13:33:56,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:56,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:33:56,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:56,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:33:56,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:33:56,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 13:33:56,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 231 transitions, 2722 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:56,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:56,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 13:33:56,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:59,622 INFO L124 PetriNetUnfolderBase]: 8071/11959 cut-off events. [2024-06-14 13:33:59,623 INFO L125 PetriNetUnfolderBase]: For 419953/419989 co-relation queries the response was YES. [2024-06-14 13:33:59,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78366 conditions, 11959 events. 8071/11959 cut-off events. For 419953/419989 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 72529 event pairs, 2652 based on Foata normal form. 26/11901 useless extension candidates. Maximal degree in co-relation 78293. Up to 10810 conditions per place. [2024-06-14 13:33:59,746 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 217 selfloop transitions, 46 changer transitions 0/289 dead transitions. [2024-06-14 13:33:59,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 289 transitions, 3572 flow [2024-06-14 13:33:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:33:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:33:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 13:33:59,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669811320754717 [2024-06-14 13:33:59,748 INFO L175 Difference]: Start difference. First operand has 166 places, 231 transitions, 2722 flow. Second operand 8 states and 198 transitions. [2024-06-14 13:33:59,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 289 transitions, 3572 flow [2024-06-14 13:34:00,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 289 transitions, 3413 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 13:34:00,663 INFO L231 Difference]: Finished difference. Result has 169 places, 241 transitions, 2843 flow [2024-06-14 13:34:00,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2843, PETRI_PLACES=169, PETRI_TRANSITIONS=241} [2024-06-14 13:34:00,663 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 113 predicate places. [2024-06-14 13:34:00,664 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 241 transitions, 2843 flow [2024-06-14 13:34:00,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:00,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:00,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:34:00,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:34:00,664 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 13:34:00,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:00,665 INFO L85 PathProgramCache]: Analyzing trace with hash -362572467, now seen corresponding path program 5 times [2024-06-14 13:34:00,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:00,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325538488] [2024-06-14 13:34:00,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:00,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:04,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:04,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325538488] [2024-06-14 13:34:04,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325538488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:04,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:04,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:04,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214315035] [2024-06-14 13:34:04,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:04,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:04,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:04,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:04,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:04,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:34:04,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 241 transitions, 2843 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 13:34:04,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:04,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:34:04,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:08,326 INFO L124 PetriNetUnfolderBase]: 8582/12567 cut-off events. [2024-06-14 13:34:08,326 INFO L125 PetriNetUnfolderBase]: For 438792/438799 co-relation queries the response was YES. [2024-06-14 13:34:08,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83485 conditions, 12567 events. 8582/12567 cut-off events. For 438792/438799 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 74842 event pairs, 2723 based on Foata normal form. 4/12565 useless extension candidates. Maximal degree in co-relation 83410. Up to 11133 conditions per place. [2024-06-14 13:34:08,436 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 170 selfloop transitions, 125 changer transitions 0/302 dead transitions. [2024-06-14 13:34:08,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 302 transitions, 3987 flow [2024-06-14 13:34:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 13:34:08,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-06-14 13:34:08,439 INFO L175 Difference]: Start difference. First operand has 169 places, 241 transitions, 2843 flow. Second operand 8 states and 206 transitions. [2024-06-14 13:34:08,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 302 transitions, 3987 flow [2024-06-14 13:34:09,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 302 transitions, 3880 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:34:09,090 INFO L231 Difference]: Finished difference. Result has 172 places, 245 transitions, 3085 flow [2024-06-14 13:34:09,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3085, PETRI_PLACES=172, PETRI_TRANSITIONS=245} [2024-06-14 13:34:09,091 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-06-14 13:34:09,091 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 245 transitions, 3085 flow [2024-06-14 13:34:09,091 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 13:34:09,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:09,092 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 13:34:09,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:34:09,092 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:34:09,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:09,092 INFO L85 PathProgramCache]: Analyzing trace with hash 529696917, now seen corresponding path program 6 times [2024-06-14 13:34:09,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:09,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028117981] [2024-06-14 13:34:09,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:09,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:12,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:12,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028117981] [2024-06-14 13:34:12,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028117981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:12,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:12,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:12,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193384020] [2024-06-14 13:34:12,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:12,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:12,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:12,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:12,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:34:12,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 245 transitions, 3085 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 13:34:12,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:12,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:34:12,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:16,559 INFO L124 PetriNetUnfolderBase]: 8620/12634 cut-off events. [2024-06-14 13:34:16,559 INFO L125 PetriNetUnfolderBase]: For 458299/458308 co-relation queries the response was YES. [2024-06-14 13:34:16,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84801 conditions, 12634 events. 8620/12634 cut-off events. For 458299/458308 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 75394 event pairs, 2729 based on Foata normal form. 4/12631 useless extension candidates. Maximal degree in co-relation 84725. Up to 11167 conditions per place. [2024-06-14 13:34:16,687 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 169 selfloop transitions, 127 changer transitions 0/303 dead transitions. [2024-06-14 13:34:16,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 303 transitions, 4239 flow [2024-06-14 13:34:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 13:34:16,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-14 13:34:16,690 INFO L175 Difference]: Start difference. First operand has 172 places, 245 transitions, 3085 flow. Second operand 8 states and 203 transitions. [2024-06-14 13:34:16,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 303 transitions, 4239 flow [2024-06-14 13:34:17,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 303 transitions, 3789 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-14 13:34:17,451 INFO L231 Difference]: Finished difference. Result has 173 places, 249 transitions, 2996 flow [2024-06-14 13:34:17,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2996, PETRI_PLACES=173, PETRI_TRANSITIONS=249} [2024-06-14 13:34:17,451 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 117 predicate places. [2024-06-14 13:34:17,451 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 249 transitions, 2996 flow [2024-06-14 13:34:17,452 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 13:34:17,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:17,452 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 13:34:17,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:34:17,452 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 13:34:17,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:17,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2098269701, now seen corresponding path program 7 times [2024-06-14 13:34:17,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:17,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63684226] [2024-06-14 13:34:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:17,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:20,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:20,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63684226] [2024-06-14 13:34:20,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63684226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:20,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:20,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:20,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171193944] [2024-06-14 13:34:20,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:20,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:20,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:20,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:20,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:20,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:34:20,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 249 transitions, 2996 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 13:34:20,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:20,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:34:20,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:24,731 INFO L124 PetriNetUnfolderBase]: 8658/12696 cut-off events. [2024-06-14 13:34:24,731 INFO L125 PetriNetUnfolderBase]: For 472207/472216 co-relation queries the response was YES. [2024-06-14 13:34:24,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85322 conditions, 12696 events. 8658/12696 cut-off events. For 472207/472216 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 75886 event pairs, 2735 based on Foata normal form. 4/12693 useless extension candidates. Maximal degree in co-relation 85245. Up to 11201 conditions per place. [2024-06-14 13:34:24,845 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 157 selfloop transitions, 135 changer transitions 0/299 dead transitions. [2024-06-14 13:34:24,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 299 transitions, 3960 flow [2024-06-14 13:34:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:34:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:34:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:34:24,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 13:34:24,847 INFO L175 Difference]: Start difference. First operand has 173 places, 249 transitions, 2996 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:34:24,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 299 transitions, 3960 flow [2024-06-14 13:34:25,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 299 transitions, 3672 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 13:34:25,564 INFO L231 Difference]: Finished difference. Result has 176 places, 253 transitions, 3069 flow [2024-06-14 13:34:25,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2712, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3069, PETRI_PLACES=176, PETRI_TRANSITIONS=253} [2024-06-14 13:34:25,565 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 120 predicate places. [2024-06-14 13:34:25,565 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 253 transitions, 3069 flow [2024-06-14 13:34:25,565 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 13:34:25,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:25,565 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, 1] [2024-06-14 13:34:25,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:34:25,566 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 13:34:25,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:25,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1305027865, now seen corresponding path program 8 times [2024-06-14 13:34:25,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:25,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673888796] [2024-06-14 13:34:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:25,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:29,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:29,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673888796] [2024-06-14 13:34:29,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673888796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:29,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:29,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:29,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653851254] [2024-06-14 13:34:29,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:29,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:29,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:29,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:29,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:29,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:34:29,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 253 transitions, 3069 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 13:34:29,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:29,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:34:29,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:33,381 INFO L124 PetriNetUnfolderBase]: 8644/12686 cut-off events. [2024-06-14 13:34:33,381 INFO L125 PetriNetUnfolderBase]: For 487258/487258 co-relation queries the response was YES. [2024-06-14 13:34:33,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85457 conditions, 12686 events. 8644/12686 cut-off events. For 487258/487258 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 75927 event pairs, 2726 based on Foata normal form. 4/12688 useless extension candidates. Maximal degree in co-relation 85379. Up to 11451 conditions per place. [2024-06-14 13:34:33,504 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 212 selfloop transitions, 107 changer transitions 0/326 dead transitions. [2024-06-14 13:34:33,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 326 transitions, 4095 flow [2024-06-14 13:34:33,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:33,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-14 13:34:33,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4989517819706499 [2024-06-14 13:34:33,506 INFO L175 Difference]: Start difference. First operand has 176 places, 253 transitions, 3069 flow. Second operand 9 states and 238 transitions. [2024-06-14 13:34:33,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 326 transitions, 4095 flow [2024-06-14 13:34:34,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 326 transitions, 3794 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-14 13:34:34,336 INFO L231 Difference]: Finished difference. Result has 180 places, 253 transitions, 3003 flow [2024-06-14 13:34:34,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2768, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3003, PETRI_PLACES=180, PETRI_TRANSITIONS=253} [2024-06-14 13:34:34,337 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 124 predicate places. [2024-06-14 13:34:34,337 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 253 transitions, 3003 flow [2024-06-14 13:34:34,337 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 13:34:34,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:34,337 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 13:34:34,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:34:34,338 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 13:34:34,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:34,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1482159385, now seen corresponding path program 9 times [2024-06-14 13:34:34,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:34,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089947698] [2024-06-14 13:34:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:34,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:37,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:37,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089947698] [2024-06-14 13:34:37,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089947698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:37,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:37,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:37,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699813961] [2024-06-14 13:34:37,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:37,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:37,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:37,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:37,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:37,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:34:37,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 253 transitions, 3003 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 13:34:37,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:37,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:34:37,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:41,536 INFO L124 PetriNetUnfolderBase]: 8630/12655 cut-off events. [2024-06-14 13:34:41,536 INFO L125 PetriNetUnfolderBase]: For 503772/503779 co-relation queries the response was YES. [2024-06-14 13:34:41,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85313 conditions, 12655 events. 8630/12655 cut-off events. For 503772/503779 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 75546 event pairs, 2789 based on Foata normal form. 4/12653 useless extension candidates. Maximal degree in co-relation 85234. Up to 11439 conditions per place. [2024-06-14 13:34:41,675 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 191 selfloop transitions, 102 changer transitions 0/300 dead transitions. [2024-06-14 13:34:41,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 300 transitions, 3749 flow [2024-06-14 13:34:41,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:34:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:34:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 13:34:41,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-14 13:34:41,677 INFO L175 Difference]: Start difference. First operand has 180 places, 253 transitions, 3003 flow. Second operand 7 states and 181 transitions. [2024-06-14 13:34:41,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 300 transitions, 3749 flow [2024-06-14 13:34:42,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 300 transitions, 3333 flow, removed 30 selfloop flow, removed 11 redundant places. [2024-06-14 13:34:42,401 INFO L231 Difference]: Finished difference. Result has 176 places, 253 transitions, 2806 flow [2024-06-14 13:34:42,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2587, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2806, PETRI_PLACES=176, PETRI_TRANSITIONS=253} [2024-06-14 13:34:42,402 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 120 predicate places. [2024-06-14 13:34:42,402 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 253 transitions, 2806 flow [2024-06-14 13:34:42,402 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 13:34:42,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:42,402 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 13:34:42,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:34:42,402 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 13:34:42,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:42,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1676141482, now seen corresponding path program 2 times [2024-06-14 13:34:42,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:42,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619988808] [2024-06-14 13:34:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:42,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:46,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:46,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619988808] [2024-06-14 13:34:46,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619988808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:46,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:46,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:46,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603389275] [2024-06-14 13:34:46,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:46,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:46,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:46,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 13:34:46,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 253 transitions, 2806 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:46,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:46,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 13:34:46,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:50,258 INFO L124 PetriNetUnfolderBase]: 8203/12189 cut-off events. [2024-06-14 13:34:50,259 INFO L125 PetriNetUnfolderBase]: For 492247/492295 co-relation queries the response was YES. [2024-06-14 13:34:50,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82224 conditions, 12189 events. 8203/12189 cut-off events. For 492247/492295 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74323 event pairs, 2182 based on Foata normal form. 14/12105 useless extension candidates. Maximal degree in co-relation 82145. Up to 10604 conditions per place. [2024-06-14 13:34:50,381 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 224 selfloop transitions, 48 changer transitions 0/298 dead transitions. [2024-06-14 13:34:50,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 298 transitions, 3572 flow [2024-06-14 13:34:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:34:50,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:34:50,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-14 13:34:50,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-14 13:34:50,383 INFO L175 Difference]: Start difference. First operand has 176 places, 253 transitions, 2806 flow. Second operand 6 states and 162 transitions. [2024-06-14 13:34:50,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 298 transitions, 3572 flow [2024-06-14 13:34:51,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 298 transitions, 3329 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:34:51,044 INFO L231 Difference]: Finished difference. Result has 174 places, 255 transitions, 2749 flow [2024-06-14 13:34:51,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2749, PETRI_PLACES=174, PETRI_TRANSITIONS=255} [2024-06-14 13:34:51,045 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 118 predicate places. [2024-06-14 13:34:51,045 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 255 transitions, 2749 flow [2024-06-14 13:34:51,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:51,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:51,045 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 13:34:51,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:34:51,046 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 13:34:51,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:51,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1689473962, now seen corresponding path program 3 times [2024-06-14 13:34:51,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:51,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010664804] [2024-06-14 13:34:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:51,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:55,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:55,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010664804] [2024-06-14 13:34:55,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010664804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:55,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:55,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:34:55,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388250936] [2024-06-14 13:34:55,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:55,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:34:55,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:55,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:34:55,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:34:55,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 13:34:55,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 255 transitions, 2749 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:55,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:55,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 13:34:55,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:58,466 INFO L124 PetriNetUnfolderBase]: 8158/12143 cut-off events. [2024-06-14 13:34:58,466 INFO L125 PetriNetUnfolderBase]: For 482918/482928 co-relation queries the response was YES. [2024-06-14 13:34:58,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81835 conditions, 12143 events. 8158/12143 cut-off events. For 482918/482928 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 74150 event pairs, 2119 based on Foata normal form. 16/12070 useless extension candidates. Maximal degree in co-relation 81756. Up to 10444 conditions per place. [2024-06-14 13:34:58,589 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 219 selfloop transitions, 50 changer transitions 0/295 dead transitions. [2024-06-14 13:34:58,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 295 transitions, 3505 flow [2024-06-14 13:34:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:34:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:34:58,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 13:34:58,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2024-06-14 13:34:58,591 INFO L175 Difference]: Start difference. First operand has 174 places, 255 transitions, 2749 flow. Second operand 6 states and 155 transitions. [2024-06-14 13:34:58,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 295 transitions, 3505 flow [2024-06-14 13:34:59,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 295 transitions, 3381 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:34:59,135 INFO L231 Difference]: Finished difference. Result has 176 places, 257 transitions, 2804 flow [2024-06-14 13:34:59,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2804, PETRI_PLACES=176, PETRI_TRANSITIONS=257} [2024-06-14 13:34:59,136 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 120 predicate places. [2024-06-14 13:34:59,136 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 257 transitions, 2804 flow [2024-06-14 13:34:59,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:34:59,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:59,136 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 13:34:59,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:34:59,137 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 13:34:59,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:59,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1689479914, now seen corresponding path program 1 times [2024-06-14 13:34:59,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:59,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646746918] [2024-06-14 13:34:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:59,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:02,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:02,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646746918] [2024-06-14 13:35:02,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646746918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:02,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:02,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:02,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67558363] [2024-06-14 13:35:02,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:02,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:02,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:02,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:02,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:02,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:35:02,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 257 transitions, 2804 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 13:35:02,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:02,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:35:02,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:06,067 INFO L124 PetriNetUnfolderBase]: 8670/12722 cut-off events. [2024-06-14 13:35:06,067 INFO L125 PetriNetUnfolderBase]: For 452193/452193 co-relation queries the response was YES. [2024-06-14 13:35:06,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83309 conditions, 12722 events. 8670/12722 cut-off events. For 452193/452193 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 75945 event pairs, 2577 based on Foata normal form. 12/12731 useless extension candidates. Maximal degree in co-relation 83229. Up to 11782 conditions per place. [2024-06-14 13:35:06,193 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 267 selfloop transitions, 30 changer transitions 0/304 dead transitions. [2024-06-14 13:35:06,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 304 transitions, 3640 flow [2024-06-14 13:35:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:35:06,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:35:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 13:35:06,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-14 13:35:06,196 INFO L175 Difference]: Start difference. First operand has 176 places, 257 transitions, 2804 flow. Second operand 7 states and 175 transitions. [2024-06-14 13:35:06,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 304 transitions, 3640 flow [2024-06-14 13:35:06,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 304 transitions, 3509 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:06,747 INFO L231 Difference]: Finished difference. Result has 179 places, 259 transitions, 2810 flow [2024-06-14 13:35:06,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2810, PETRI_PLACES=179, PETRI_TRANSITIONS=259} [2024-06-14 13:35:06,748 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 123 predicate places. [2024-06-14 13:35:06,748 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 259 transitions, 2810 flow [2024-06-14 13:35:06,748 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 13:35:06,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:06,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:06,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:35:06,749 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 13:35:06,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:06,749 INFO L85 PathProgramCache]: Analyzing trace with hash -512046066, now seen corresponding path program 1 times [2024-06-14 13:35:06,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:06,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699119335] [2024-06-14 13:35:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:06,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:10,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:10,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699119335] [2024-06-14 13:35:10,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699119335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:10,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:10,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:10,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913541549] [2024-06-14 13:35:10,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:10,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:10,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:10,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:10,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:10,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:35:10,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 259 transitions, 2810 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 13:35:10,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:10,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:35:10,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:14,417 INFO L124 PetriNetUnfolderBase]: 8990/13217 cut-off events. [2024-06-14 13:35:14,417 INFO L125 PetriNetUnfolderBase]: For 500409/500409 co-relation queries the response was YES. [2024-06-14 13:35:14,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87397 conditions, 13217 events. 8990/13217 cut-off events. For 500409/500409 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 79896 event pairs, 2739 based on Foata normal form. 16/13228 useless extension candidates. Maximal degree in co-relation 87316. Up to 11723 conditions per place. [2024-06-14 13:35:14,539 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 237 selfloop transitions, 84 changer transitions 0/328 dead transitions. [2024-06-14 13:35:14,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 328 transitions, 3977 flow [2024-06-14 13:35:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-14 13:35:14,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292452830188677 [2024-06-14 13:35:14,541 INFO L175 Difference]: Start difference. First operand has 179 places, 259 transitions, 2810 flow. Second operand 8 states and 209 transitions. [2024-06-14 13:35:14,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 328 transitions, 3977 flow [2024-06-14 13:35:15,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 328 transitions, 3878 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:35:15,187 INFO L231 Difference]: Finished difference. Result has 182 places, 263 transitions, 3019 flow [2024-06-14 13:35:15,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2711, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3019, PETRI_PLACES=182, PETRI_TRANSITIONS=263} [2024-06-14 13:35:15,188 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 126 predicate places. [2024-06-14 13:35:15,188 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 263 transitions, 3019 flow [2024-06-14 13:35:15,188 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 13:35:15,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:15,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:15,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:35:15,189 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 13:35:15,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash -385245604, now seen corresponding path program 2 times [2024-06-14 13:35:15,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:15,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456129538] [2024-06-14 13:35:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:15,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:18,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:18,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456129538] [2024-06-14 13:35:18,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456129538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:18,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:18,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:18,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228255654] [2024-06-14 13:35:18,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:18,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:18,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:18,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:18,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:18,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:35:18,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 263 transitions, 3019 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 13:35:18,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:18,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:35:18,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:23,081 INFO L124 PetriNetUnfolderBase]: 9138/13437 cut-off events. [2024-06-14 13:35:23,082 INFO L125 PetriNetUnfolderBase]: For 530041/530041 co-relation queries the response was YES. [2024-06-14 13:35:23,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90120 conditions, 13437 events. 9138/13437 cut-off events. For 530041/530041 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 81359 event pairs, 2811 based on Foata normal form. 20/13452 useless extension candidates. Maximal degree in co-relation 90038. Up to 12221 conditions per place. [2024-06-14 13:35:23,199 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 235 selfloop transitions, 79 changer transitions 0/321 dead transitions. [2024-06-14 13:35:23,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 321 transitions, 3926 flow [2024-06-14 13:35:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 13:35:23,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740566037735849 [2024-06-14 13:35:23,201 INFO L175 Difference]: Start difference. First operand has 182 places, 263 transitions, 3019 flow. Second operand 8 states and 201 transitions. [2024-06-14 13:35:23,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 321 transitions, 3926 flow [2024-06-14 13:35:23,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 321 transitions, 3788 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:23,987 INFO L231 Difference]: Finished difference. Result has 186 places, 265 transitions, 3119 flow [2024-06-14 13:35:23,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2885, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3119, PETRI_PLACES=186, PETRI_TRANSITIONS=265} [2024-06-14 13:35:23,988 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 130 predicate places. [2024-06-14 13:35:23,988 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 265 transitions, 3119 flow [2024-06-14 13:35:23,988 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 13:35:23,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:23,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:23,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:35:23,989 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 13:35:23,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:23,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1364204314, now seen corresponding path program 3 times [2024-06-14 13:35:23,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:23,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245893625] [2024-06-14 13:35:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:23,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245893625] [2024-06-14 13:35:28,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245893625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:28,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:28,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:28,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472202477] [2024-06-14 13:35:28,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:28,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:28,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:28,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:35:28,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 265 transitions, 3119 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 13:35:28,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:28,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:35:28,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:32,004 INFO L124 PetriNetUnfolderBase]: 9734/14274 cut-off events. [2024-06-14 13:35:32,004 INFO L125 PetriNetUnfolderBase]: For 559840/559840 co-relation queries the response was YES. [2024-06-14 13:35:32,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95627 conditions, 14274 events. 9734/14274 cut-off events. For 559840/559840 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 86830 event pairs, 2918 based on Foata normal form. 20/14292 useless extension candidates. Maximal degree in co-relation 95543. Up to 12624 conditions per place. [2024-06-14 13:35:32,133 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 262 selfloop transitions, 52 changer transitions 0/321 dead transitions. [2024-06-14 13:35:32,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 321 transitions, 4046 flow [2024-06-14 13:35:32,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:32,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 13:35:32,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693396226415094 [2024-06-14 13:35:32,135 INFO L175 Difference]: Start difference. First operand has 186 places, 265 transitions, 3119 flow. Second operand 8 states and 199 transitions. [2024-06-14 13:35:32,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 321 transitions, 4046 flow [2024-06-14 13:35:32,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 321 transitions, 3858 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:32,774 INFO L231 Difference]: Finished difference. Result has 188 places, 268 transitions, 3144 flow [2024-06-14 13:35:32,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2933, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3144, PETRI_PLACES=188, PETRI_TRANSITIONS=268} [2024-06-14 13:35:32,775 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 132 predicate places. [2024-06-14 13:35:32,775 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 268 transitions, 3144 flow [2024-06-14 13:35:32,775 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 13:35:32,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:32,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:32,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:35:32,776 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:35:32,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:32,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1894352478, now seen corresponding path program 1 times [2024-06-14 13:35:32,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:32,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80257762] [2024-06-14 13:35:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:32,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:36,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:36,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80257762] [2024-06-14 13:35:36,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80257762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:36,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:36,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:35:36,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298646057] [2024-06-14 13:35:36,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:36,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:35:36,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:35:36,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:35:36,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 13:35:36,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 268 transitions, 3144 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:36,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:36,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 13:35:36,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:39,363 INFO L124 PetriNetUnfolderBase]: 8761/13172 cut-off events. [2024-06-14 13:35:39,363 INFO L125 PetriNetUnfolderBase]: For 587191/587607 co-relation queries the response was YES. [2024-06-14 13:35:39,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89881 conditions, 13172 events. 8761/13172 cut-off events. For 587191/587607 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 84418 event pairs, 2751 based on Foata normal form. 12/12893 useless extension candidates. Maximal degree in co-relation 89796. Up to 11712 conditions per place. [2024-06-14 13:35:39,535 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 204 selfloop transitions, 43 changer transitions 0/304 dead transitions. [2024-06-14 13:35:39,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 304 transitions, 3788 flow [2024-06-14 13:35:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:35:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:35:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 13:35:39,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-14 13:35:39,537 INFO L175 Difference]: Start difference. First operand has 188 places, 268 transitions, 3144 flow. Second operand 6 states and 154 transitions. [2024-06-14 13:35:39,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 304 transitions, 3788 flow [2024-06-14 13:35:40,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 304 transitions, 3654 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:35:40,591 INFO L231 Difference]: Finished difference. Result has 188 places, 273 transitions, 3174 flow [2024-06-14 13:35:40,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3010, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3174, PETRI_PLACES=188, PETRI_TRANSITIONS=273} [2024-06-14 13:35:40,592 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 132 predicate places. [2024-06-14 13:35:40,592 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 273 transitions, 3174 flow [2024-06-14 13:35:40,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:35:40,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:40,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:40,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:35:40,593 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:35:40,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:40,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2101740530, now seen corresponding path program 4 times [2024-06-14 13:35:40,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:40,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759531409] [2024-06-14 13:35:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:40,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:44,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:44,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759531409] [2024-06-14 13:35:44,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759531409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:44,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:44,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:44,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090906996] [2024-06-14 13:35:44,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:44,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:44,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:44,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:44,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:35:44,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 273 transitions, 3174 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 13:35:44,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:44,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:35:44,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:48,089 INFO L124 PetriNetUnfolderBase]: 10138/14864 cut-off events. [2024-06-14 13:35:48,090 INFO L125 PetriNetUnfolderBase]: For 622235/622251 co-relation queries the response was YES. [2024-06-14 13:35:48,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103029 conditions, 14864 events. 10138/14864 cut-off events. For 622235/622251 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 91334 event pairs, 2954 based on Foata normal form. 28/14888 useless extension candidates. Maximal degree in co-relation 102943. Up to 13397 conditions per place. [2024-06-14 13:35:48,310 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 252 selfloop transitions, 81 changer transitions 0/340 dead transitions. [2024-06-14 13:35:48,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 340 transitions, 4401 flow [2024-06-14 13:35:48,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 13:35:48,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834905660377358 [2024-06-14 13:35:48,312 INFO L175 Difference]: Start difference. First operand has 188 places, 273 transitions, 3174 flow. Second operand 8 states and 205 transitions. [2024-06-14 13:35:48,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 340 transitions, 4401 flow [2024-06-14 13:35:49,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 340 transitions, 4295 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:49,302 INFO L231 Difference]: Finished difference. Result has 192 places, 277 transitions, 3377 flow [2024-06-14 13:35:49,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3068, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3377, PETRI_PLACES=192, PETRI_TRANSITIONS=277} [2024-06-14 13:35:49,302 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 136 predicate places. [2024-06-14 13:35:49,303 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 277 transitions, 3377 flow [2024-06-14 13:35:49,303 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 13:35:49,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:49,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:49,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:35:49,303 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:35:49,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:49,304 INFO L85 PathProgramCache]: Analyzing trace with hash -759256908, now seen corresponding path program 5 times [2024-06-14 13:35:49,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:49,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505750947] [2024-06-14 13:35:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:49,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:53,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:53,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505750947] [2024-06-14 13:35:53,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505750947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:53,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:53,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:35:53,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092205040] [2024-06-14 13:35:53,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:53,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:35:53,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:53,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:35:53,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:35:53,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:35:53,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 277 transitions, 3377 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 13:35:53,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:53,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:35:53,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:57,324 INFO L124 PetriNetUnfolderBase]: 10286/15087 cut-off events. [2024-06-14 13:35:57,325 INFO L125 PetriNetUnfolderBase]: For 663175/663196 co-relation queries the response was YES. [2024-06-14 13:35:57,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106013 conditions, 15087 events. 10286/15087 cut-off events. For 663175/663196 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 92943 event pairs, 3000 based on Foata normal form. 32/15114 useless extension candidates. Maximal degree in co-relation 105926. Up to 13845 conditions per place. [2024-06-14 13:35:57,491 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 248 selfloop transitions, 78 changer transitions 0/333 dead transitions. [2024-06-14 13:35:57,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 333 transitions, 4324 flow [2024-06-14 13:35:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:35:57,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:35:57,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:35:57,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-14 13:35:57,494 INFO L175 Difference]: Start difference. First operand has 192 places, 277 transitions, 3377 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:35:57,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 333 transitions, 4324 flow [2024-06-14 13:35:58,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 333 transitions, 4174 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:58,618 INFO L231 Difference]: Finished difference. Result has 196 places, 279 transitions, 3467 flow [2024-06-14 13:35:58,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3235, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3467, PETRI_PLACES=196, PETRI_TRANSITIONS=279} [2024-06-14 13:35:58,618 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 140 predicate places. [2024-06-14 13:35:58,618 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 279 transitions, 3467 flow [2024-06-14 13:35:58,619 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 13:35:58,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:58,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:35:58,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:35:58,619 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:35:58,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:58,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1881508810, now seen corresponding path program 6 times [2024-06-14 13:35:58,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:58,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954652195] [2024-06-14 13:35:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:58,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:02,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:02,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954652195] [2024-06-14 13:36:02,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954652195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:02,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:02,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:02,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450153292] [2024-06-14 13:36:02,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:02,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:02,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:02,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:02,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:02,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:36:02,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 279 transitions, 3467 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 13:36:02,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:02,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:36:02,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:07,032 INFO L124 PetriNetUnfolderBase]: 10518/15423 cut-off events. [2024-06-14 13:36:07,032 INFO L125 PetriNetUnfolderBase]: For 695986/696007 co-relation queries the response was YES. [2024-06-14 13:36:07,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109507 conditions, 15423 events. 10518/15423 cut-off events. For 695986/696007 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 95023 event pairs, 2740 based on Foata normal form. 28/15446 useless extension candidates. Maximal degree in co-relation 109418. Up to 12169 conditions per place. [2024-06-14 13:36:07,170 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 238 selfloop transitions, 106 changer transitions 0/351 dead transitions. [2024-06-14 13:36:07,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 351 transitions, 4940 flow [2024-06-14 13:36:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:07,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-14 13:36:07,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49528301886792453 [2024-06-14 13:36:07,173 INFO L175 Difference]: Start difference. First operand has 196 places, 279 transitions, 3467 flow. Second operand 8 states and 210 transitions. [2024-06-14 13:36:07,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 351 transitions, 4940 flow [2024-06-14 13:36:08,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 351 transitions, 4756 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:36:08,045 INFO L231 Difference]: Finished difference. Result has 198 places, 283 transitions, 3650 flow [2024-06-14 13:36:08,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3650, PETRI_PLACES=198, PETRI_TRANSITIONS=283} [2024-06-14 13:36:08,046 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 142 predicate places. [2024-06-14 13:36:08,046 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 283 transitions, 3650 flow [2024-06-14 13:36:08,046 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 13:36:08,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:08,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:08,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:36:08,046 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:36:08,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:08,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1067338270, now seen corresponding path program 7 times [2024-06-14 13:36:08,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:08,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389664219] [2024-06-14 13:36:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:08,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:11,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:11,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389664219] [2024-06-14 13:36:11,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389664219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:11,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:11,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:11,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118604536] [2024-06-14 13:36:11,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:11,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:11,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:11,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:11,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:11,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:36:11,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 283 transitions, 3650 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 13:36:11,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:11,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:36:11,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:15,645 INFO L124 PetriNetUnfolderBase]: 10634/15587 cut-off events. [2024-06-14 13:36:15,645 INFO L125 PetriNetUnfolderBase]: For 730969/730990 co-relation queries the response was YES. [2024-06-14 13:36:15,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112450 conditions, 15587 events. 10634/15587 cut-off events. For 730969/730990 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 96210 event pairs, 2750 based on Foata normal form. 28/15610 useless extension candidates. Maximal degree in co-relation 112360. Up to 12233 conditions per place. [2024-06-14 13:36:15,810 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 230 selfloop transitions, 109 changer transitions 0/346 dead transitions. [2024-06-14 13:36:15,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 346 transitions, 4843 flow [2024-06-14 13:36:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 13:36:15,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-14 13:36:15,814 INFO L175 Difference]: Start difference. First operand has 198 places, 283 transitions, 3650 flow. Second operand 8 states and 203 transitions. [2024-06-14 13:36:15,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 346 transitions, 4843 flow [2024-06-14 13:36:17,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 346 transitions, 4502 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-14 13:36:17,016 INFO L231 Difference]: Finished difference. Result has 200 places, 285 transitions, 3610 flow [2024-06-14 13:36:17,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3321, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3610, PETRI_PLACES=200, PETRI_TRANSITIONS=285} [2024-06-14 13:36:17,016 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 144 predicate places. [2024-06-14 13:36:17,016 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 285 transitions, 3610 flow [2024-06-14 13:36:17,017 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 13:36:17,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:17,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:17,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:36:17,017 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:36:17,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:17,017 INFO L85 PathProgramCache]: Analyzing trace with hash -614224882, now seen corresponding path program 8 times [2024-06-14 13:36:17,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:17,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565739498] [2024-06-14 13:36:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:17,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:20,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:20,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565739498] [2024-06-14 13:36:20,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565739498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:20,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:20,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:20,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964184598] [2024-06-14 13:36:20,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:20,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:20,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:20,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:20,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:20,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:36:20,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 285 transitions, 3610 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 13:36:20,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:20,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:36:20,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:25,285 INFO L124 PetriNetUnfolderBase]: 10986/16071 cut-off events. [2024-06-14 13:36:25,285 INFO L125 PetriNetUnfolderBase]: For 770798/770819 co-relation queries the response was YES. [2024-06-14 13:36:25,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115834 conditions, 16071 events. 10986/16071 cut-off events. For 770798/770819 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 99544 event pairs, 3170 based on Foata normal form. 32/16098 useless extension candidates. Maximal degree in co-relation 115744. Up to 14157 conditions per place. [2024-06-14 13:36:25,444 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 250 selfloop transitions, 87 changer transitions 0/344 dead transitions. [2024-06-14 13:36:25,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 344 transitions, 4851 flow [2024-06-14 13:36:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 13:36:25,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669811320754717 [2024-06-14 13:36:25,446 INFO L175 Difference]: Start difference. First operand has 200 places, 285 transitions, 3610 flow. Second operand 8 states and 198 transitions. [2024-06-14 13:36:25,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 344 transitions, 4851 flow [2024-06-14 13:36:26,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 344 transitions, 4642 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:36:26,810 INFO L231 Difference]: Finished difference. Result has 204 places, 289 transitions, 3746 flow [2024-06-14 13:36:26,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3405, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3746, PETRI_PLACES=204, PETRI_TRANSITIONS=289} [2024-06-14 13:36:26,810 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 148 predicate places. [2024-06-14 13:36:26,810 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 289 transitions, 3746 flow [2024-06-14 13:36:26,811 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 13:36:26,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:26,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:26,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:36:26,811 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:36:26,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:26,811 INFO L85 PathProgramCache]: Analyzing trace with hash -621843442, now seen corresponding path program 9 times [2024-06-14 13:36:26,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:26,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703513578] [2024-06-14 13:36:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:26,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:30,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:30,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703513578] [2024-06-14 13:36:30,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703513578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:30,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:30,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:30,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121132397] [2024-06-14 13:36:30,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:30,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:30,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:30,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:30,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:30,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:36:30,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 289 transitions, 3746 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 13:36:30,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:30,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:36:30,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:35,205 INFO L124 PetriNetUnfolderBase]: 10930/15995 cut-off events. [2024-06-14 13:36:35,205 INFO L125 PetriNetUnfolderBase]: For 776988/777009 co-relation queries the response was YES. [2024-06-14 13:36:35,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114430 conditions, 15995 events. 10930/15995 cut-off events. For 776988/777009 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 99216 event pairs, 3202 based on Foata normal form. 32/16022 useless extension candidates. Maximal degree in co-relation 114338. Up to 14753 conditions per place. [2024-06-14 13:36:35,352 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 251 selfloop transitions, 80 changer transitions 0/338 dead transitions. [2024-06-14 13:36:35,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 338 transitions, 4611 flow [2024-06-14 13:36:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:35,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 13:36:35,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455188679245283 [2024-06-14 13:36:35,354 INFO L175 Difference]: Start difference. First operand has 204 places, 289 transitions, 3746 flow. Second operand 8 states and 193 transitions. [2024-06-14 13:36:35,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 338 transitions, 4611 flow [2024-06-14 13:36:37,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 338 transitions, 4392 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 13:36:37,037 INFO L231 Difference]: Finished difference. Result has 207 places, 289 transitions, 3695 flow [2024-06-14 13:36:37,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3527, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3695, PETRI_PLACES=207, PETRI_TRANSITIONS=289} [2024-06-14 13:36:37,038 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 151 predicate places. [2024-06-14 13:36:37,038 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 289 transitions, 3695 flow [2024-06-14 13:36:37,038 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 13:36:37,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:37,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:37,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:36:37,038 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:36:37,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1801166000, now seen corresponding path program 10 times [2024-06-14 13:36:37,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:37,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024598576] [2024-06-14 13:36:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:37,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:40,776 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 13:36:40,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:40,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024598576] [2024-06-14 13:36:40,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024598576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:40,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:40,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:40,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462977813] [2024-06-14 13:36:40,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:40,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:40,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:40,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:40,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:40,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:36:40,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 289 transitions, 3695 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 13:36:40,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:40,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:36:40,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:45,773 INFO L124 PetriNetUnfolderBase]: 10874/15900 cut-off events. [2024-06-14 13:36:45,773 INFO L125 PetriNetUnfolderBase]: For 771652/771652 co-relation queries the response was YES. [2024-06-14 13:36:45,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112384 conditions, 15900 events. 10874/15900 cut-off events. For 771652/771652 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 98592 event pairs, 3194 based on Foata normal form. 20/15918 useless extension candidates. Maximal degree in co-relation 112291. Up to 12963 conditions per place. [2024-06-14 13:36:45,925 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 254 selfloop transitions, 104 changer transitions 0/365 dead transitions. [2024-06-14 13:36:45,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 365 transitions, 4707 flow [2024-06-14 13:36:45,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-14 13:36:45,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010482180293501 [2024-06-14 13:36:45,927 INFO L175 Difference]: Start difference. First operand has 207 places, 289 transitions, 3695 flow. Second operand 9 states and 239 transitions. [2024-06-14 13:36:45,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 365 transitions, 4707 flow [2024-06-14 13:36:47,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 365 transitions, 4503 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:47,209 INFO L231 Difference]: Finished difference. Result has 209 places, 289 transitions, 3732 flow [2024-06-14 13:36:47,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3491, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3732, PETRI_PLACES=209, PETRI_TRANSITIONS=289} [2024-06-14 13:36:47,210 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 153 predicate places. [2024-06-14 13:36:47,210 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 289 transitions, 3732 flow [2024-06-14 13:36:47,210 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 13:36:47,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:47,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:47,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:36:47,211 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:36:47,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:47,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1297691472, now seen corresponding path program 11 times [2024-06-14 13:36:47,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:47,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377843037] [2024-06-14 13:36:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:47,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:50,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:50,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377843037] [2024-06-14 13:36:50,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377843037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:50,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:50,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:36:50,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330691779] [2024-06-14 13:36:50,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:50,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:36:50,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:50,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:36:50,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:36:50,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:36:50,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 289 transitions, 3732 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 13:36:50,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:50,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:36:50,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:55,203 INFO L124 PetriNetUnfolderBase]: 10818/15829 cut-off events. [2024-06-14 13:36:55,203 INFO L125 PetriNetUnfolderBase]: For 767888/767895 co-relation queries the response was YES. [2024-06-14 13:36:55,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111640 conditions, 15829 events. 10818/15829 cut-off events. For 767888/767895 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 98237 event pairs, 3249 based on Foata normal form. 20/15843 useless extension candidates. Maximal degree in co-relation 111546. Up to 14491 conditions per place. [2024-06-14 13:36:55,364 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 241 selfloop transitions, 92 changer transitions 0/340 dead transitions. [2024-06-14 13:36:55,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 340 transitions, 4606 flow [2024-06-14 13:36:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:36:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:36:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 13:36:55,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-14 13:36:55,366 INFO L175 Difference]: Start difference. First operand has 209 places, 289 transitions, 3732 flow. Second operand 7 states and 183 transitions. [2024-06-14 13:36:55,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 340 transitions, 4606 flow [2024-06-14 13:36:57,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 340 transitions, 4391 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:57,076 INFO L231 Difference]: Finished difference. Result has 209 places, 289 transitions, 3714 flow [2024-06-14 13:36:57,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3517, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3714, PETRI_PLACES=209, PETRI_TRANSITIONS=289} [2024-06-14 13:36:57,077 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 153 predicate places. [2024-06-14 13:36:57,077 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 289 transitions, 3714 flow [2024-06-14 13:36:57,077 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 13:36:57,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:57,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:57,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:36:57,077 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:36:57,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:57,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1091506790, now seen corresponding path program 12 times [2024-06-14 13:36:57,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:57,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411233421] [2024-06-14 13:36:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:57,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:00,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:00,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411233421] [2024-06-14 13:37:00,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411233421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:00,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:00,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:37:00,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757084503] [2024-06-14 13:37:00,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:00,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:37:00,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:00,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:37:00,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:37:00,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-14 13:37:00,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 289 transitions, 3714 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 13:37:00,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:00,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-14 13:37:00,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand