./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_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/safe012_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/safe012_power.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe012_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 13:06:11,000 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:06:11,067 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:06:11,072 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:06:11,073 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:06:11,098 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:06:11,098 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:06:11,098 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:06:11,099 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:06:11,102 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:06:11,102 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:06:11,103 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:06:11,103 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:06:11,104 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:06:11,105 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:06:11,105 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:06:11,105 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:06:11,105 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:06:11,106 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:06:11,106 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:06:11,107 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:06:11,107 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:06:11,107 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:06:11,108 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:06:11,108 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:06:11,108 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:06:11,108 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:06:11,109 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:06:11,109 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:06:11,109 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:06:11,110 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:06:11,110 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:06:11,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:06:11,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:06:11,111 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:06:11,111 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:06:11,111 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:06:11,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:06:11,112 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:06:11,112 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:06:11,112 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:06:11,112 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:06:11,112 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:06:11,113 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:06:11,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:06:11,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:06:11,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:06:11,449 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:06:11,450 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:06:11,451 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_power.oepc.i [2024-06-14 13:06:12,509 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:06:12,749 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:06:12,749 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_power.oepc.i [2024-06-14 13:06:12,771 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3fec5fac/8a2dd6fdbb45401f9f0446954a08c3ec/FLAG00c321073 [2024-06-14 13:06:12,783 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3fec5fac/8a2dd6fdbb45401f9f0446954a08c3ec [2024-06-14 13:06:12,786 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:06:12,787 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:06:12,792 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe012_power.oepc.yml/witness.yml [2024-06-14 13:06:12,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:06:12,988 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:06:12,989 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:06:12,989 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:06:12,993 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:06:12,993 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:06:12" (1/2) ... [2024-06-14 13:06:12,994 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f0d48d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:06:12, skipping insertion in model container [2024-06-14 13:06:12,994 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:06:12" (1/2) ... [2024-06-14 13:06:12,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d3dce1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:06:12, skipping insertion in model container [2024-06-14 13:06:12,996 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:06:12" (2/2) ... [2024-06-14 13:06:12,997 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f0d48d0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:12, skipping insertion in model container [2024-06-14 13:06:12,997 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:06:12" (2/2) ... [2024-06-14 13:06:12,997 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:06:13,144 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:06:13,146 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 13:06:13,146 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 13:06:13,146 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 1) && __unbuffered_p0_EAX$read_delayed_var == & z) && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$w_buff1_used == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-14 13:06:13,146 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:06:13,147 INFO L106 edCorrectnessWitness]: ghost_update [L838-L838] multithreaded = 1; [2024-06-14 13:06:13,186 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:06:13,485 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:06:13,499 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:06:13,634 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:06:13,675 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:06:13,676 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13 WrapperNode [2024-06-14 13:06:13,676 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:06:13,677 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:06:13,677 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:06:13,677 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:06:13,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13" (1/1) ... [2024-06-14 13:06:13,703 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13" (1/1) ... [2024-06-14 13:06:13,733 INFO L138 Inliner]: procedures = 175, calls = 82, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 209 [2024-06-14 13:06:13,733 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:06:13,734 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:06:13,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:06:13,734 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:06:13,755 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13" (1/1) ... [2024-06-14 13:06:13,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13" (1/1) ... [2024-06-14 13:06:13,759 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13" (1/1) ... [2024-06-14 13:06:13,774 INFO L175 MemorySlicer]: Split 41 memory accesses to 2 slices as follows [2, 39]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-14 13:06:13,774 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13" (1/1) ... [2024-06-14 13:06:13,775 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13" (1/1) ... [2024-06-14 13:06:13,785 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13" (1/1) ... [2024-06-14 13:06:13,787 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13" (1/1) ... [2024-06-14 13:06:13,798 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13" (1/1) ... [2024-06-14 13:06:13,799 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13" (1/1) ... [2024-06-14 13:06:13,803 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:06:13,804 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:06:13,804 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:06:13,804 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:06:13,805 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13" (1/1) ... [2024-06-14 13:06:13,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:06:13,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:06:13,865 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 13:06:13,880 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 13:06:13,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:06:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:06:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:06:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:06:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:06:13,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:06:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:06:13,913 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:06:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:06:13,913 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:06:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:06:13,913 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:06:13,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:06:13,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:06:13,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:06:13,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:06:13,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:06:13,917 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 13:06:14,045 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:06:14,047 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:06:14,494 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:06:14,495 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:06:14,925 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:06:14,925 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:06:14,926 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:06:14 BoogieIcfgContainer [2024-06-14 13:06:14,926 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:06:14,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:06:14,928 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:06:14,931 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:06:14,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:06:12" (1/4) ... [2024-06-14 13:06:14,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cc5065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:06:14, skipping insertion in model container [2024-06-14 13:06:14,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:06:12" (2/4) ... [2024-06-14 13:06:14,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cc5065 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:06:14, skipping insertion in model container [2024-06-14 13:06:14,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:06:13" (3/4) ... [2024-06-14 13:06:14,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58cc5065 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:06:14, skipping insertion in model container [2024-06-14 13:06:14,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:06:14" (4/4) ... [2024-06-14 13:06:14,933 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_power.oepc.i [2024-06-14 13:06:14,983 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:06:14,983 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:06:14,983 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:06:15,033 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:06:15,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:06:15,096 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 13:06:15,096 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:06:15,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:06:15,100 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 13:06:15,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 13:06:15,110 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:06:15,117 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;@68412376, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:06:15,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:06:15,121 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:06:15,121 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:06:15,121 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:06:15,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:15,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:06:15,122 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:15,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:15,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1008493454, now seen corresponding path program 1 times [2024-06-14 13:06:15,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:15,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408903262] [2024-06-14 13:06:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:15,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:17,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:17,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408903262] [2024-06-14 13:06:17,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408903262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:17,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:17,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:06:17,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653078053] [2024-06-14 13:06:17,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:17,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:06:17,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:17,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:06:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:06:17,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 13:06:17,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:17,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:17,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 13:06:17,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:17,570 INFO L124 PetriNetUnfolderBase]: 770/1240 cut-off events. [2024-06-14 13:06:17,570 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-14 13:06:17,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2485 conditions, 1240 events. 770/1240 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5959 event pairs, 479 based on Foata normal form. 1/1210 useless extension candidates. Maximal degree in co-relation 2470. Up to 1178 conditions per place. [2024-06-14 13:06:17,580 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-14 13:06:17,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-14 13:06:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:06:17,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:06:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-14 13:06:17,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-14 13:06:17,591 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-14 13:06:17,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-14 13:06:17,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:17,595 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 13:06:17,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 13:06:17,599 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 13:06:17,600 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 13:06:17,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:17,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:17,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:17,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:06:17,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:17,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:17,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1500341491, now seen corresponding path program 1 times [2024-06-14 13:06:17,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:17,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150063093] [2024-06-14 13:06:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:17,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:19,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:19,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150063093] [2024-06-14 13:06:19,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150063093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:19,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:19,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:06:19,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679061220] [2024-06-14 13:06:19,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:19,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:06:19,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:19,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:06:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:06:19,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-14 13:06:19,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:19,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:19,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-14 13:06:19,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:20,448 INFO L124 PetriNetUnfolderBase]: 764/1232 cut-off events. [2024-06-14 13:06:20,448 INFO L125 PetriNetUnfolderBase]: For 253/261 co-relation queries the response was YES. [2024-06-14 13:06:20,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2840 conditions, 1232 events. 764/1232 cut-off events. For 253/261 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5880 event pairs, 369 based on Foata normal form. 6/1235 useless extension candidates. Maximal degree in co-relation 2825. Up to 1150 conditions per place. [2024-06-14 13:06:20,454 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-14 13:06:20,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 260 flow [2024-06-14 13:06:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:06:20,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:06:20,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-14 13:06:20,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-06-14 13:06:20,456 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 94 transitions. [2024-06-14 13:06:20,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 260 flow [2024-06-14 13:06:20,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:06:20,458 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 13:06:20,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 13:06:20,459 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 13:06:20,459 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 13:06:20,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:20,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:20,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:20,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:06:20,460 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:20,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:20,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1053155975, now seen corresponding path program 1 times [2024-06-14 13:06:20,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:20,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056785696] [2024-06-14 13:06:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:20,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:23,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:23,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056785696] [2024-06-14 13:06:23,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056785696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:23,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:23,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:06:23,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187200118] [2024-06-14 13:06:23,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:23,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:06:23,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:23,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:06:23,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:06:23,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:06:23,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:23,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:23,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:06:23,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:24,232 INFO L124 PetriNetUnfolderBase]: 969/1527 cut-off events. [2024-06-14 13:06:24,232 INFO L125 PetriNetUnfolderBase]: For 847/863 co-relation queries the response was YES. [2024-06-14 13:06:24,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3918 conditions, 1527 events. 969/1527 cut-off events. For 847/863 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7173 event pairs, 305 based on Foata normal form. 12/1533 useless extension candidates. Maximal degree in co-relation 3901. Up to 1394 conditions per place. [2024-06-14 13:06:24,242 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-14 13:06:24,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-14 13:06:24,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:24,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-14 13:06:24,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-14 13:06:24,248 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-14 13:06:24,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-14 13:06:24,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 13:06:24,252 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-14 13:06:24,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-14 13:06:24,254 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-14 13:06:24,254 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-14 13:06:24,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:24,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:24,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:24,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:06:24,254 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:24,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1373797094, now seen corresponding path program 1 times [2024-06-14 13:06:24,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:24,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732584205] [2024-06-14 13:06:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:24,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:25,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:25,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732584205] [2024-06-14 13:06:25,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732584205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:25,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:25,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:06:25,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117152432] [2024-06-14 13:06:25,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:25,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:06:25,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:25,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:06:25,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:06:25,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:06:25,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:25,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:25,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:06:25,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:26,754 INFO L124 PetriNetUnfolderBase]: 964/1519 cut-off events. [2024-06-14 13:06:26,755 INFO L125 PetriNetUnfolderBase]: For 1574/1586 co-relation queries the response was YES. [2024-06-14 13:06:26,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4300 conditions, 1519 events. 964/1519 cut-off events. For 1574/1586 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7104 event pairs, 382 based on Foata normal form. 8/1526 useless extension candidates. Maximal degree in co-relation 4281. Up to 1452 conditions per place. [2024-06-14 13:06:26,764 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 47 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-14 13:06:26,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 341 flow [2024-06-14 13:06:26,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:06:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:06:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-14 13:06:26,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-14 13:06:26,766 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 94 transitions. [2024-06-14 13:06:26,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 341 flow [2024-06-14 13:06:26,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 314 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:26,770 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-14 13:06:26,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-14 13:06:26,772 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-14 13:06:26,772 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-14 13:06:26,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:26,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:26,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:26,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:06:26,773 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:26,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:26,774 INFO L85 PathProgramCache]: Analyzing trace with hash -377155083, now seen corresponding path program 1 times [2024-06-14 13:06:26,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:26,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411101753] [2024-06-14 13:06:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:26,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:28,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:28,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411101753] [2024-06-14 13:06:28,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411101753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:28,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:28,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:06:28,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736474111] [2024-06-14 13:06:28,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:28,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:06:28,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:28,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:06:28,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:06:28,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:28,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:28,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:28,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:28,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:29,675 INFO L124 PetriNetUnfolderBase]: 1112/1733 cut-off events. [2024-06-14 13:06:29,676 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2024-06-14 13:06:29,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5222 conditions, 1733 events. 1112/1733 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8155 event pairs, 451 based on Foata normal form. 2/1735 useless extension candidates. Maximal degree in co-relation 5201. Up to 1656 conditions per place. [2024-06-14 13:06:29,684 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-14 13:06:29,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 428 flow [2024-06-14 13:06:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 13:06:29,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-14 13:06:29,688 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 6 states and 106 transitions. [2024-06-14 13:06:29,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 428 flow [2024-06-14 13:06:29,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 401 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:29,695 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 267 flow [2024-06-14 13:06:29,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-14 13:06:29,697 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 13:06:29,697 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 267 flow [2024-06-14 13:06:29,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:29,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:29,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:29,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:06:29,698 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:29,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:29,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1663876103, now seen corresponding path program 1 times [2024-06-14 13:06:29,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:29,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313269733] [2024-06-14 13:06:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:29,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:32,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:32,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313269733] [2024-06-14 13:06:32,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313269733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:32,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:32,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:06:32,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179412837] [2024-06-14 13:06:32,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:32,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:06:32,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:32,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:06:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:06:32,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:06:32,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:32,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:32,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:06:32,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:33,200 INFO L124 PetriNetUnfolderBase]: 1067/1678 cut-off events. [2024-06-14 13:06:33,200 INFO L125 PetriNetUnfolderBase]: For 3654/3686 co-relation queries the response was YES. [2024-06-14 13:06:33,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5606 conditions, 1678 events. 1067/1678 cut-off events. For 3654/3686 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7967 event pairs, 390 based on Foata normal form. 14/1682 useless extension candidates. Maximal degree in co-relation 5582. Up to 1549 conditions per place. [2024-06-14 13:06:33,209 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 19 changer transitions 0/87 dead transitions. [2024-06-14 13:06:33,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 539 flow [2024-06-14 13:06:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:33,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 13:06:33,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-14 13:06:33,211 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 267 flow. Second operand 6 states and 119 transitions. [2024-06-14 13:06:33,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 539 flow [2024-06-14 13:06:33,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 533 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 13:06:33,215 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 349 flow [2024-06-14 13:06:33,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=349, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-14 13:06:33,219 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-14 13:06:33,219 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 349 flow [2024-06-14 13:06:33,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:33,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:33,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:33,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:06:33,220 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:33,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:33,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1680487763, now seen corresponding path program 2 times [2024-06-14 13:06:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:33,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157072812] [2024-06-14 13:06:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:33,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:35,221 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 13:06:35,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:35,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157072812] [2024-06-14 13:06:35,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157072812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:35,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:35,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:06:35,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938449477] [2024-06-14 13:06:35,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:35,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:06:35,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:35,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:06:35,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:06:35,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:06:35,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:35,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:35,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:06:35,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:36,206 INFO L124 PetriNetUnfolderBase]: 1082/1705 cut-off events. [2024-06-14 13:06:36,206 INFO L125 PetriNetUnfolderBase]: For 5169/5209 co-relation queries the response was YES. [2024-06-14 13:06:36,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6224 conditions, 1705 events. 1082/1705 cut-off events. For 5169/5209 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8152 event pairs, 390 based on Foata normal form. 16/1713 useless extension candidates. Maximal degree in co-relation 6197. Up to 1574 conditions per place. [2024-06-14 13:06:36,217 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 53 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-14 13:06:36,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 539 flow [2024-06-14 13:06:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-14 13:06:36,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-14 13:06:36,219 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 349 flow. Second operand 6 states and 113 transitions. [2024-06-14 13:06:36,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 539 flow [2024-06-14 13:06:36,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 506 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:06:36,224 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 363 flow [2024-06-14 13:06:36,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-06-14 13:06:36,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-14 13:06:36,225 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 363 flow [2024-06-14 13:06:36,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:36,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:36,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:36,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:06:36,226 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:36,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:36,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1154661264, now seen corresponding path program 1 times [2024-06-14 13:06:36,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:36,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081579021] [2024-06-14 13:06:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:36,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:38,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:38,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081579021] [2024-06-14 13:06:38,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081579021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:38,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:38,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:06:38,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633089657] [2024-06-14 13:06:38,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:38,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:06:38,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:06:38,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:06:38,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:06:38,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:38,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:38,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:06:38,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:39,652 INFO L124 PetriNetUnfolderBase]: 1118/1770 cut-off events. [2024-06-14 13:06:39,653 INFO L125 PetriNetUnfolderBase]: For 5990/6030 co-relation queries the response was YES. [2024-06-14 13:06:39,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6522 conditions, 1770 events. 1118/1770 cut-off events. For 5990/6030 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8475 event pairs, 385 based on Foata normal form. 16/1777 useless extension candidates. Maximal degree in co-relation 6493. Up to 1608 conditions per place. [2024-06-14 13:06:39,663 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 76 selfloop transitions, 26 changer transitions 0/111 dead transitions. [2024-06-14 13:06:39,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 111 transitions, 737 flow [2024-06-14 13:06:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 13:06:39,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-14 13:06:39,665 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 363 flow. Second operand 8 states and 155 transitions. [2024-06-14 13:06:39,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 111 transitions, 737 flow [2024-06-14 13:06:39,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 111 transitions, 673 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:39,671 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 470 flow [2024-06-14 13:06:39,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=470, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2024-06-14 13:06:39,672 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-14 13:06:39,672 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 470 flow [2024-06-14 13:06:39,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:39,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:39,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:39,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:06:39,674 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:39,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1846234694, now seen corresponding path program 2 times [2024-06-14 13:06:39,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:39,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713320224] [2024-06-14 13:06:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:39,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:42,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:42,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713320224] [2024-06-14 13:06:42,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713320224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:42,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:42,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:06:42,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950357779] [2024-06-14 13:06:42,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:42,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:06:42,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:42,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:06:42,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:06:42,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:06:42,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 470 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:42,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:42,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:06:42,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:43,461 INFO L124 PetriNetUnfolderBase]: 1131/1795 cut-off events. [2024-06-14 13:06:43,462 INFO L125 PetriNetUnfolderBase]: For 7743/7798 co-relation queries the response was YES. [2024-06-14 13:06:43,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7124 conditions, 1795 events. 1131/1795 cut-off events. For 7743/7798 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8661 event pairs, 370 based on Foata normal form. 28/1814 useless extension candidates. Maximal degree in co-relation 7093. Up to 1610 conditions per place. [2024-06-14 13:06:43,474 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 74 selfloop transitions, 28 changer transitions 0/111 dead transitions. [2024-06-14 13:06:43,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 111 transitions, 798 flow [2024-06-14 13:06:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 13:06:43,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-14 13:06:43,477 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 470 flow. Second operand 7 states and 136 transitions. [2024-06-14 13:06:43,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 111 transitions, 798 flow [2024-06-14 13:06:43,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 111 transitions, 755 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:43,483 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 530 flow [2024-06-14 13:06:43,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-06-14 13:06:43,484 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2024-06-14 13:06:43,484 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 530 flow [2024-06-14 13:06:43,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:43,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:43,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:43,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:06:43,485 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:43,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:43,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1846114724, now seen corresponding path program 3 times [2024-06-14 13:06:43,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:43,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673961113] [2024-06-14 13:06:43,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:43,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:46,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:46,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673961113] [2024-06-14 13:06:46,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673961113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:46,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:46,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:06:46,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3680103] [2024-06-14 13:06:46,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:46,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:06:46,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:46,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:06:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:06:46,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:06:46,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 530 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:46,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:46,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:06:46,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:47,386 INFO L124 PetriNetUnfolderBase]: 1146/1823 cut-off events. [2024-06-14 13:06:47,386 INFO L125 PetriNetUnfolderBase]: For 10258/10328 co-relation queries the response was YES. [2024-06-14 13:06:47,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7715 conditions, 1823 events. 1146/1823 cut-off events. For 10258/10328 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8837 event pairs, 381 based on Foata normal form. 18/1828 useless extension candidates. Maximal degree in co-relation 7683. Up to 1564 conditions per place. [2024-06-14 13:06:47,407 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 40 changer transitions 0/114 dead transitions. [2024-06-14 13:06:47,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 114 transitions, 924 flow [2024-06-14 13:06:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 13:06:47,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-14 13:06:47,409 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 530 flow. Second operand 7 states and 138 transitions. [2024-06-14 13:06:47,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 114 transitions, 924 flow [2024-06-14 13:06:47,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 114 transitions, 835 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:06:47,418 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 607 flow [2024-06-14 13:06:47,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=607, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2024-06-14 13:06:47,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-14 13:06:47,419 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 607 flow [2024-06-14 13:06:47,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:47,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:47,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:47,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:06:47,420 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:47,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:47,420 INFO L85 PathProgramCache]: Analyzing trace with hash 446852456, now seen corresponding path program 1 times [2024-06-14 13:06:47,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:47,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112042743] [2024-06-14 13:06:47,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:47,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:49,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:49,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112042743] [2024-06-14 13:06:49,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112042743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:49,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:49,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:06:49,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701431606] [2024-06-14 13:06:49,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:49,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:06:49,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:49,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:06:49,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:06:50,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:50,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 607 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:50,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:50,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:50,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:51,248 INFO L124 PetriNetUnfolderBase]: 1249/1966 cut-off events. [2024-06-14 13:06:51,248 INFO L125 PetriNetUnfolderBase]: For 10087/10091 co-relation queries the response was YES. [2024-06-14 13:06:51,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8087 conditions, 1966 events. 1249/1966 cut-off events. For 10087/10091 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9473 event pairs, 407 based on Foata normal form. 6/1971 useless extension candidates. Maximal degree in co-relation 8054. Up to 1774 conditions per place. [2024-06-14 13:06:51,276 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 103 selfloop transitions, 23 changer transitions 0/131 dead transitions. [2024-06-14 13:06:51,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 131 transitions, 1077 flow [2024-06-14 13:06:51,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:06:51,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 13:06:51,278 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 607 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:06:51,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 131 transitions, 1077 flow [2024-06-14 13:06:51,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 131 transitions, 1026 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:51,289 INFO L231 Difference]: Finished difference. Result has 83 places, 99 transitions, 729 flow [2024-06-14 13:06:51,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=729, PETRI_PLACES=83, PETRI_TRANSITIONS=99} [2024-06-14 13:06:51,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-14 13:06:51,290 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 99 transitions, 729 flow [2024-06-14 13:06:51,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:51,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:51,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:51,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:06:51,291 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:51,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash 555514288, now seen corresponding path program 4 times [2024-06-14 13:06:51,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:51,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577922271] [2024-06-14 13:06:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:51,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:53,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:53,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577922271] [2024-06-14 13:06:53,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577922271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:53,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:53,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:06:53,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144115060] [2024-06-14 13:06:53,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:53,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:06:53,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:53,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:06:53,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:06:53,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:06:53,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 99 transitions, 729 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:53,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:53,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:06:53,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:54,953 INFO L124 PetriNetUnfolderBase]: 1174/1873 cut-off events. [2024-06-14 13:06:54,954 INFO L125 PetriNetUnfolderBase]: For 12289/12399 co-relation queries the response was YES. [2024-06-14 13:06:54,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8330 conditions, 1873 events. 1174/1873 cut-off events. For 12289/12399 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9119 event pairs, 365 based on Foata normal form. 22/1854 useless extension candidates. Maximal degree in co-relation 8293. Up to 1579 conditions per place. [2024-06-14 13:06:54,992 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 44 changer transitions 0/123 dead transitions. [2024-06-14 13:06:54,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 123 transitions, 1019 flow [2024-06-14 13:06:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:06:54,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-14 13:06:54,994 INFO L175 Difference]: Start difference. First operand has 83 places, 99 transitions, 729 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:06:54,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 123 transitions, 1019 flow [2024-06-14 13:06:55,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 123 transitions, 975 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:55,005 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 782 flow [2024-06-14 13:06:55,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=782, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-14 13:06:55,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-14 13:06:55,020 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 782 flow [2024-06-14 13:06:55,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:55,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:55,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:55,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:06:55,021 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:55,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:55,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1668745868, now seen corresponding path program 2 times [2024-06-14 13:06:55,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:55,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713025544] [2024-06-14 13:06:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:55,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:57,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:57,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713025544] [2024-06-14 13:06:57,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713025544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:57,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:57,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:06:57,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892499492] [2024-06-14 13:06:57,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:57,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:06:57,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:57,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:06:57,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:06:57,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:06:57,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 782 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:57,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:57,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:06:57,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:58,564 INFO L124 PetriNetUnfolderBase]: 1254/1977 cut-off events. [2024-06-14 13:06:58,565 INFO L125 PetriNetUnfolderBase]: For 13630/13644 co-relation queries the response was YES. [2024-06-14 13:06:58,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8851 conditions, 1977 events. 1254/1977 cut-off events. For 13630/13644 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9524 event pairs, 403 based on Foata normal form. 16/1993 useless extension candidates. Maximal degree in co-relation 8813. Up to 1777 conditions per place. [2024-06-14 13:06:58,576 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 99 selfloop transitions, 29 changer transitions 0/133 dead transitions. [2024-06-14 13:06:58,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 133 transitions, 1204 flow [2024-06-14 13:06:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:06:58,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 13:06:58,578 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 782 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:06:58,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 133 transitions, 1204 flow [2024-06-14 13:06:58,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 1086 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:58,591 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 781 flow [2024-06-14 13:06:58,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=781, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-14 13:06:58,592 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-14 13:06:58,592 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 781 flow [2024-06-14 13:06:58,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:58,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:58,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:58,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:06:58,592 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:58,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:58,593 INFO L85 PathProgramCache]: Analyzing trace with hash 451494086, now seen corresponding path program 3 times [2024-06-14 13:06:58,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:58,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455561089] [2024-06-14 13:06:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:58,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:00,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:00,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455561089] [2024-06-14 13:07:00,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455561089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:00,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:00,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:07:00,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138275533] [2024-06-14 13:07:00,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:00,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:07:00,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:00,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:07:00,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:07:00,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:00,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 781 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:00,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:00,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:00,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:01,945 INFO L124 PetriNetUnfolderBase]: 1249/1970 cut-off events. [2024-06-14 13:07:01,946 INFO L125 PetriNetUnfolderBase]: For 14602/14616 co-relation queries the response was YES. [2024-06-14 13:07:01,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8894 conditions, 1970 events. 1249/1970 cut-off events. For 14602/14616 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9499 event pairs, 403 based on Foata normal form. 16/1986 useless extension candidates. Maximal degree in co-relation 8854. Up to 1772 conditions per place. [2024-06-14 13:07:01,971 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 98 selfloop transitions, 28 changer transitions 0/131 dead transitions. [2024-06-14 13:07:01,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 131 transitions, 1113 flow [2024-06-14 13:07:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:07:01,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:07:01,986 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 781 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:07:01,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 131 transitions, 1113 flow [2024-06-14 13:07:01,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 1082 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 13:07:01,999 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 814 flow [2024-06-14 13:07:01,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=814, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2024-06-14 13:07:02,000 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-14 13:07:02,000 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 814 flow [2024-06-14 13:07:02,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:02,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:02,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:02,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:07:02,001 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:02,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:02,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1668736940, now seen corresponding path program 1 times [2024-06-14 13:07:02,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:02,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448113108] [2024-06-14 13:07:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:02,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:04,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:04,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448113108] [2024-06-14 13:07:04,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448113108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:04,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:04,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:07:04,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101311542] [2024-06-14 13:07:04,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:04,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:07:04,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:04,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:07:04,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:07:04,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:04,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 814 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:04,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:04,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:04,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:05,407 INFO L124 PetriNetUnfolderBase]: 1241/1952 cut-off events. [2024-06-14 13:07:05,407 INFO L125 PetriNetUnfolderBase]: For 16486/16488 co-relation queries the response was YES. [2024-06-14 13:07:05,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8973 conditions, 1952 events. 1241/1952 cut-off events. For 16486/16488 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9334 event pairs, 390 based on Foata normal form. 4/1956 useless extension candidates. Maximal degree in co-relation 8931. Up to 1825 conditions per place. [2024-06-14 13:07:05,418 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 114 selfloop transitions, 13 changer transitions 0/132 dead transitions. [2024-06-14 13:07:05,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 132 transitions, 1150 flow [2024-06-14 13:07:05,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:07:05,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:07:05,420 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 814 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:07:05,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 132 transitions, 1150 flow [2024-06-14 13:07:05,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 132 transitions, 1094 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:05,435 INFO L231 Difference]: Finished difference. Result has 96 places, 107 transitions, 807 flow [2024-06-14 13:07:05,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=807, PETRI_PLACES=96, PETRI_TRANSITIONS=107} [2024-06-14 13:07:05,435 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-14 13:07:05,435 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 107 transitions, 807 flow [2024-06-14 13:07:05,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:05,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:05,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:05,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:07:05,436 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:05,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:05,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1398699293, now seen corresponding path program 1 times [2024-06-14 13:07:05,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:05,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950550695] [2024-06-14 13:07:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:05,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:08,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:08,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950550695] [2024-06-14 13:07:08,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950550695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:08,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:08,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:08,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810561064] [2024-06-14 13:07:08,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:08,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:08,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:08,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:08,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:08,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:08,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 107 transitions, 807 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:08,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:08,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:08,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:09,573 INFO L124 PetriNetUnfolderBase]: 1254/1979 cut-off events. [2024-06-14 13:07:09,573 INFO L125 PetriNetUnfolderBase]: For 18303/18311 co-relation queries the response was YES. [2024-06-14 13:07:09,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9276 conditions, 1979 events. 1254/1979 cut-off events. For 18303/18311 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 9484 event pairs, 365 based on Foata normal form. 10/1989 useless extension candidates. Maximal degree in co-relation 9233. Up to 1776 conditions per place. [2024-06-14 13:07:09,585 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 129 selfloop transitions, 25 changer transitions 0/159 dead transitions. [2024-06-14 13:07:09,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 159 transitions, 1336 flow [2024-06-14 13:07:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:07:09,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:07:09,587 INFO L175 Difference]: Start difference. First operand has 96 places, 107 transitions, 807 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:07:09,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 159 transitions, 1336 flow [2024-06-14 13:07:09,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 159 transitions, 1305 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:09,603 INFO L231 Difference]: Finished difference. Result has 101 places, 122 transitions, 989 flow [2024-06-14 13:07:09,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=989, PETRI_PLACES=101, PETRI_TRANSITIONS=122} [2024-06-14 13:07:09,604 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-14 13:07:09,604 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 122 transitions, 989 flow [2024-06-14 13:07:09,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:09,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:09,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:09,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:07:09,605 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:09,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:09,605 INFO L85 PathProgramCache]: Analyzing trace with hash 967519855, now seen corresponding path program 2 times [2024-06-14 13:07:09,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:09,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794699326] [2024-06-14 13:07:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:09,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:12,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:12,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794699326] [2024-06-14 13:07:12,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794699326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:12,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:12,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:12,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220011228] [2024-06-14 13:07:12,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:12,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:12,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:12,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:12,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:12,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:12,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 122 transitions, 989 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:12,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:12,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:12,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:13,868 INFO L124 PetriNetUnfolderBase]: 1285/2032 cut-off events. [2024-06-14 13:07:13,869 INFO L125 PetriNetUnfolderBase]: For 21711/21713 co-relation queries the response was YES. [2024-06-14 13:07:13,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10068 conditions, 2032 events. 1285/2032 cut-off events. For 21711/21713 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9809 event pairs, 381 based on Foata normal form. 2/2033 useless extension candidates. Maximal degree in co-relation 10022. Up to 1667 conditions per place. [2024-06-14 13:07:13,881 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 119 selfloop transitions, 47 changer transitions 0/171 dead transitions. [2024-06-14 13:07:13,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 171 transitions, 1637 flow [2024-06-14 13:07:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:07:13,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-14 13:07:13,883 INFO L175 Difference]: Start difference. First operand has 101 places, 122 transitions, 989 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:07:13,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 171 transitions, 1637 flow [2024-06-14 13:07:13,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 171 transitions, 1585 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:13,923 INFO L231 Difference]: Finished difference. Result has 107 places, 134 transitions, 1173 flow [2024-06-14 13:07:13,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1173, PETRI_PLACES=107, PETRI_TRANSITIONS=134} [2024-06-14 13:07:13,923 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-14 13:07:13,923 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 134 transitions, 1173 flow [2024-06-14 13:07:13,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:13,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:13,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:13,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:07:13,924 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:13,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:13,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2114829859, now seen corresponding path program 3 times [2024-06-14 13:07:13,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:13,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654515788] [2024-06-14 13:07:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:13,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:16,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:16,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654515788] [2024-06-14 13:07:16,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654515788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:16,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:16,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:16,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755785450] [2024-06-14 13:07:16,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:16,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:16,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:16,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:16,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:16,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 134 transitions, 1173 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:16,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:16,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:16,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:18,278 INFO L124 PetriNetUnfolderBase]: 1280/2025 cut-off events. [2024-06-14 13:07:18,279 INFO L125 PetriNetUnfolderBase]: For 24742/24744 co-relation queries the response was YES. [2024-06-14 13:07:18,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10691 conditions, 2025 events. 1280/2025 cut-off events. For 24742/24744 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9780 event pairs, 381 based on Foata normal form. 2/2026 useless extension candidates. Maximal degree in co-relation 10642. Up to 1662 conditions per place. [2024-06-14 13:07:18,291 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 115 selfloop transitions, 50 changer transitions 0/170 dead transitions. [2024-06-14 13:07:18,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 170 transitions, 1677 flow [2024-06-14 13:07:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:07:18,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-14 13:07:18,293 INFO L175 Difference]: Start difference. First operand has 107 places, 134 transitions, 1173 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:07:18,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 170 transitions, 1677 flow [2024-06-14 13:07:18,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 170 transitions, 1605 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 13:07:18,319 INFO L231 Difference]: Finished difference. Result has 112 places, 135 transitions, 1220 flow [2024-06-14 13:07:18,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1220, PETRI_PLACES=112, PETRI_TRANSITIONS=135} [2024-06-14 13:07:18,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-14 13:07:18,320 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 135 transitions, 1220 flow [2024-06-14 13:07:18,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:18,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:18,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:18,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:07:18,321 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:18,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash -256329583, now seen corresponding path program 4 times [2024-06-14 13:07:18,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:18,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717236279] [2024-06-14 13:07:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:18,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:21,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:21,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717236279] [2024-06-14 13:07:21,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717236279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:21,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:21,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:21,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994616321] [2024-06-14 13:07:21,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:21,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:21,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:21,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:21,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:21,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:21,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 135 transitions, 1220 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:21,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:21,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:21,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:22,620 INFO L124 PetriNetUnfolderBase]: 1293/2049 cut-off events. [2024-06-14 13:07:22,620 INFO L125 PetriNetUnfolderBase]: For 27673/27685 co-relation queries the response was YES. [2024-06-14 13:07:22,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11071 conditions, 2049 events. 1293/2049 cut-off events. For 27673/27685 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9916 event pairs, 385 based on Foata normal form. 6/2054 useless extension candidates. Maximal degree in co-relation 11020. Up to 1676 conditions per place. [2024-06-14 13:07:22,633 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 110 selfloop transitions, 56 changer transitions 0/171 dead transitions. [2024-06-14 13:07:22,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 171 transitions, 1765 flow [2024-06-14 13:07:22,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:07:22,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:07:22,636 INFO L175 Difference]: Start difference. First operand has 112 places, 135 transitions, 1220 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:07:22,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 171 transitions, 1765 flow [2024-06-14 13:07:22,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 171 transitions, 1674 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:22,662 INFO L231 Difference]: Finished difference. Result has 116 places, 140 transitions, 1333 flow [2024-06-14 13:07:22,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1333, PETRI_PLACES=116, PETRI_TRANSITIONS=140} [2024-06-14 13:07:22,663 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-14 13:07:22,663 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 140 transitions, 1333 flow [2024-06-14 13:07:22,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:22,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:22,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:22,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:07:22,664 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:22,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:22,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1456446411, now seen corresponding path program 5 times [2024-06-14 13:07:22,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:22,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68310627] [2024-06-14 13:07:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:22,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:25,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:25,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68310627] [2024-06-14 13:07:25,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68310627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:25,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:25,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:25,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040064898] [2024-06-14 13:07:25,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:25,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:25,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:25,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:25,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:25,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:25,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 140 transitions, 1333 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:25,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:25,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:25,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:26,997 INFO L124 PetriNetUnfolderBase]: 1306/2074 cut-off events. [2024-06-14 13:07:26,998 INFO L125 PetriNetUnfolderBase]: For 30614/30626 co-relation queries the response was YES. [2024-06-14 13:07:27,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11487 conditions, 2074 events. 1306/2074 cut-off events. For 30614/30626 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10090 event pairs, 385 based on Foata normal form. 6/2079 useless extension candidates. Maximal degree in co-relation 11434. Up to 1690 conditions per place. [2024-06-14 13:07:27,011 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 114 selfloop transitions, 55 changer transitions 0/174 dead transitions. [2024-06-14 13:07:27,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 174 transitions, 1870 flow [2024-06-14 13:07:27,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:27,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:07:27,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-14 13:07:27,013 INFO L175 Difference]: Start difference. First operand has 116 places, 140 transitions, 1333 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:07:27,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 174 transitions, 1870 flow [2024-06-14 13:07:27,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 174 transitions, 1782 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:27,042 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 1404 flow [2024-06-14 13:07:27,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1404, PETRI_PLACES=120, PETRI_TRANSITIONS=143} [2024-06-14 13:07:27,043 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-14 13:07:27,043 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 1404 flow [2024-06-14 13:07:27,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:27,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:27,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:27,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:07:27,043 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:27,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash -198870399, now seen corresponding path program 6 times [2024-06-14 13:07:27,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:27,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132178121] [2024-06-14 13:07:27,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:27,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:27,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:29,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:29,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132178121] [2024-06-14 13:07:29,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132178121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:29,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:29,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:29,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602675627] [2024-06-14 13:07:29,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:29,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:29,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:29,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:29,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:29,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:29,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 143 transitions, 1404 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:29,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:29,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:29,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:31,003 INFO L124 PetriNetUnfolderBase]: 1301/2067 cut-off events. [2024-06-14 13:07:31,003 INFO L125 PetriNetUnfolderBase]: For 33041/33053 co-relation queries the response was YES. [2024-06-14 13:07:31,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11559 conditions, 2067 events. 1301/2067 cut-off events. For 33041/33053 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10024 event pairs, 385 based on Foata normal form. 6/2072 useless extension candidates. Maximal degree in co-relation 11505. Up to 1685 conditions per place. [2024-06-14 13:07:31,017 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 111 selfloop transitions, 56 changer transitions 0/172 dead transitions. [2024-06-14 13:07:31,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 172 transitions, 1820 flow [2024-06-14 13:07:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:31,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:07:31,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-14 13:07:31,031 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 1404 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:07:31,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 172 transitions, 1820 flow [2024-06-14 13:07:31,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 172 transitions, 1626 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:07:31,057 INFO L231 Difference]: Finished difference. Result has 121 places, 143 transitions, 1330 flow [2024-06-14 13:07:31,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1330, PETRI_PLACES=121, PETRI_TRANSITIONS=143} [2024-06-14 13:07:31,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-14 13:07:31,058 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 143 transitions, 1330 flow [2024-06-14 13:07:31,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:31,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:31,059 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 13:07:31,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:07:31,059 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:31,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:31,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1094280653, now seen corresponding path program 1 times [2024-06-14 13:07:31,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:31,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477685514] [2024-06-14 13:07:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:31,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:34,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:34,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477685514] [2024-06-14 13:07:34,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477685514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:34,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:34,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:34,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775256008] [2024-06-14 13:07:34,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:34,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:34,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:34,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:34,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:34,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:07:34,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 143 transitions, 1330 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:34,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:34,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:07:34,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:35,812 INFO L124 PetriNetUnfolderBase]: 1307/2103 cut-off events. [2024-06-14 13:07:35,813 INFO L125 PetriNetUnfolderBase]: For 39438/39464 co-relation queries the response was YES. [2024-06-14 13:07:35,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11987 conditions, 2103 events. 1307/2103 cut-off events. For 39438/39464 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10610 event pairs, 212 based on Foata normal form. 20/2079 useless extension candidates. Maximal degree in co-relation 11933. Up to 1677 conditions per place. [2024-06-14 13:07:35,834 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 119 selfloop transitions, 48 changer transitions 0/193 dead transitions. [2024-06-14 13:07:35,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 193 transitions, 1928 flow [2024-06-14 13:07:35,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:35,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 13:07:35,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-14 13:07:35,836 INFO L175 Difference]: Start difference. First operand has 121 places, 143 transitions, 1330 flow. Second operand 9 states and 173 transitions. [2024-06-14 13:07:35,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 193 transitions, 1928 flow [2024-06-14 13:07:35,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 193 transitions, 1818 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:35,878 INFO L231 Difference]: Finished difference. Result has 124 places, 147 transitions, 1379 flow [2024-06-14 13:07:35,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1220, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1379, PETRI_PLACES=124, PETRI_TRANSITIONS=147} [2024-06-14 13:07:35,879 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-14 13:07:35,879 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 147 transitions, 1379 flow [2024-06-14 13:07:35,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:35,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:35,881 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 13:07:35,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:07:35,881 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:35,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:35,881 INFO L85 PathProgramCache]: Analyzing trace with hash -412805189, now seen corresponding path program 2 times [2024-06-14 13:07:35,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:35,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724292421] [2024-06-14 13:07:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:35,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:38,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:38,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724292421] [2024-06-14 13:07:38,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724292421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:38,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:38,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:38,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382828103] [2024-06-14 13:07:38,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:38,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:38,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:38,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:38,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:38,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:07:38,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 147 transitions, 1379 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:38,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:38,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:07:38,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:40,017 INFO L124 PetriNetUnfolderBase]: 1295/2085 cut-off events. [2024-06-14 13:07:40,017 INFO L125 PetriNetUnfolderBase]: For 42171/42204 co-relation queries the response was YES. [2024-06-14 13:07:40,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12047 conditions, 2085 events. 1295/2085 cut-off events. For 42171/42204 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10490 event pairs, 297 based on Foata normal form. 18/2060 useless extension candidates. Maximal degree in co-relation 11992. Up to 1758 conditions per place. [2024-06-14 13:07:40,030 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 115 selfloop transitions, 44 changer transitions 0/185 dead transitions. [2024-06-14 13:07:40,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 185 transitions, 1809 flow [2024-06-14 13:07:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:07:40,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 13:07:40,032 INFO L175 Difference]: Start difference. First operand has 124 places, 147 transitions, 1379 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:07:40,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 185 transitions, 1809 flow [2024-06-14 13:07:40,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 185 transitions, 1712 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:40,068 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1380 flow [2024-06-14 13:07:40,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1380, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-14 13:07:40,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-14 13:07:40,069 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1380 flow [2024-06-14 13:07:40,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:40,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:40,069 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 13:07:40,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:07:40,069 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:40,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:40,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1135039653, now seen corresponding path program 3 times [2024-06-14 13:07:40,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:40,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735822664] [2024-06-14 13:07:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:40,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:42,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:42,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735822664] [2024-06-14 13:07:42,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735822664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:42,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:42,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:42,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744325380] [2024-06-14 13:07:42,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:42,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:42,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:42,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:42,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:42,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:07:42,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1380 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:42,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:42,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:07:42,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:43,803 INFO L124 PetriNetUnfolderBase]: 1319/2122 cut-off events. [2024-06-14 13:07:43,804 INFO L125 PetriNetUnfolderBase]: For 46133/46152 co-relation queries the response was YES. [2024-06-14 13:07:43,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12380 conditions, 2122 events. 1319/2122 cut-off events. For 46133/46152 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10698 event pairs, 308 based on Foata normal form. 6/2077 useless extension candidates. Maximal degree in co-relation 12323. Up to 1729 conditions per place. [2024-06-14 13:07:43,817 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 95 selfloop transitions, 61 changer transitions 0/182 dead transitions. [2024-06-14 13:07:43,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 182 transitions, 1814 flow [2024-06-14 13:07:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:43,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:07:43,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-14 13:07:43,822 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1380 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:07:43,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 182 transitions, 1814 flow [2024-06-14 13:07:43,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 182 transitions, 1716 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:07:43,863 INFO L231 Difference]: Finished difference. Result has 128 places, 149 transitions, 1446 flow [2024-06-14 13:07:43,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1446, PETRI_PLACES=128, PETRI_TRANSITIONS=149} [2024-06-14 13:07:43,863 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-14 13:07:43,863 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 149 transitions, 1446 flow [2024-06-14 13:07:43,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:43,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:43,864 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 13:07:43,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:07:43,865 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:43,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:43,866 INFO L85 PathProgramCache]: Analyzing trace with hash -294532811, now seen corresponding path program 1 times [2024-06-14 13:07:43,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:43,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609534000] [2024-06-14 13:07:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:43,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:46,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:46,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609534000] [2024-06-14 13:07:46,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609534000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:46,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:46,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:46,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659620173] [2024-06-14 13:07:46,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:46,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:46,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:46,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:46,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:46,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 149 transitions, 1446 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:46,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:46,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:46,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:48,152 INFO L124 PetriNetUnfolderBase]: 1405/2235 cut-off events. [2024-06-14 13:07:48,152 INFO L125 PetriNetUnfolderBase]: For 46389/46401 co-relation queries the response was YES. [2024-06-14 13:07:48,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12919 conditions, 2235 events. 1405/2235 cut-off events. For 46389/46401 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11122 event pairs, 346 based on Foata normal form. 16/2250 useless extension candidates. Maximal degree in co-relation 12861. Up to 1990 conditions per place. [2024-06-14 13:07:48,168 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 151 selfloop transitions, 30 changer transitions 0/186 dead transitions. [2024-06-14 13:07:48,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 186 transitions, 1926 flow [2024-06-14 13:07:48,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:07:48,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:07:48,170 INFO L175 Difference]: Start difference. First operand has 128 places, 149 transitions, 1446 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:07:48,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 186 transitions, 1926 flow [2024-06-14 13:07:48,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 186 transitions, 1782 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:48,212 INFO L231 Difference]: Finished difference. Result has 130 places, 151 transitions, 1387 flow [2024-06-14 13:07:48,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1387, PETRI_PLACES=130, PETRI_TRANSITIONS=151} [2024-06-14 13:07:48,212 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-14 13:07:48,213 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 151 transitions, 1387 flow [2024-06-14 13:07:48,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:48,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:48,213 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 13:07:48,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:07:48,213 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:48,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:48,214 INFO L85 PathProgramCache]: Analyzing trace with hash 415639833, now seen corresponding path program 4 times [2024-06-14 13:07:48,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:48,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547336950] [2024-06-14 13:07:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:48,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:50,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:50,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547336950] [2024-06-14 13:07:50,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547336950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:50,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:50,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:50,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321699171] [2024-06-14 13:07:50,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:50,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:50,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:50,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:50,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:50,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 151 transitions, 1387 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:50,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:50,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:50,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:52,371 INFO L124 PetriNetUnfolderBase]: 1392/2212 cut-off events. [2024-06-14 13:07:52,371 INFO L125 PetriNetUnfolderBase]: For 47924/47936 co-relation queries the response was YES. [2024-06-14 13:07:52,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12776 conditions, 2212 events. 1392/2212 cut-off events. For 47924/47936 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10936 event pairs, 358 based on Foata normal form. 10/2221 useless extension candidates. Maximal degree in co-relation 12717. Up to 1851 conditions per place. [2024-06-14 13:07:52,387 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 118 selfloop transitions, 61 changer transitions 0/184 dead transitions. [2024-06-14 13:07:52,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 184 transitions, 1873 flow [2024-06-14 13:07:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:52,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:07:52,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-14 13:07:52,389 INFO L175 Difference]: Start difference. First operand has 130 places, 151 transitions, 1387 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:07:52,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 184 transitions, 1873 flow [2024-06-14 13:07:52,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 184 transitions, 1806 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:52,430 INFO L231 Difference]: Finished difference. Result has 132 places, 153 transitions, 1488 flow [2024-06-14 13:07:52,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1488, PETRI_PLACES=132, PETRI_TRANSITIONS=153} [2024-06-14 13:07:52,431 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-14 13:07:52,431 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 153 transitions, 1488 flow [2024-06-14 13:07:52,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:52,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:52,431 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 13:07:52,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:07:52,431 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:52,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:52,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1869833931, now seen corresponding path program 2 times [2024-06-14 13:07:52,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:52,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532737546] [2024-06-14 13:07:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:52,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:55,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:55,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532737546] [2024-06-14 13:07:55,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532737546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:55,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:55,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:55,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658211116] [2024-06-14 13:07:55,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:55,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:55,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:55,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:55,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:55,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:55,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 153 transitions, 1488 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:55,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:55,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:55,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:56,622 INFO L124 PetriNetUnfolderBase]: 1412/2251 cut-off events. [2024-06-14 13:07:56,622 INFO L125 PetriNetUnfolderBase]: For 51508/51528 co-relation queries the response was YES. [2024-06-14 13:07:56,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13218 conditions, 2251 events. 1412/2251 cut-off events. For 51508/51528 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11290 event pairs, 340 based on Foata normal form. 24/2275 useless extension candidates. Maximal degree in co-relation 13158. Up to 2003 conditions per place. [2024-06-14 13:07:56,639 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 152 selfloop transitions, 30 changer transitions 0/187 dead transitions. [2024-06-14 13:07:56,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 187 transitions, 1966 flow [2024-06-14 13:07:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:56,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:56,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:07:56,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:07:56,656 INFO L175 Difference]: Start difference. First operand has 132 places, 153 transitions, 1488 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:07:56,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 187 transitions, 1966 flow [2024-06-14 13:07:56,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 187 transitions, 1818 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:56,696 INFO L231 Difference]: Finished difference. Result has 134 places, 155 transitions, 1429 flow [2024-06-14 13:07:56,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1429, PETRI_PLACES=134, PETRI_TRANSITIONS=155} [2024-06-14 13:07:56,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-14 13:07:56,696 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 155 transitions, 1429 flow [2024-06-14 13:07:56,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:56,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:56,697 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 13:07:56,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:07:56,697 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:56,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1866892203, now seen corresponding path program 3 times [2024-06-14 13:07:56,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:56,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075071021] [2024-06-14 13:07:56,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:56,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:59,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:59,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075071021] [2024-06-14 13:07:59,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075071021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:59,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:59,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:59,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977283084] [2024-06-14 13:07:59,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:59,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:59,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:59,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:59,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:07:59,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 155 transitions, 1429 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:59,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:59,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:07:59,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:00,741 INFO L124 PetriNetUnfolderBase]: 1432/2283 cut-off events. [2024-06-14 13:08:00,741 INFO L125 PetriNetUnfolderBase]: For 54528/54548 co-relation queries the response was YES. [2024-06-14 13:08:00,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13433 conditions, 2283 events. 1432/2283 cut-off events. For 54528/54548 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11458 event pairs, 346 based on Foata normal form. 24/2307 useless extension candidates. Maximal degree in co-relation 13372. Up to 2035 conditions per place. [2024-06-14 13:08:00,758 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 153 selfloop transitions, 31 changer transitions 0/189 dead transitions. [2024-06-14 13:08:00,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 189 transitions, 1915 flow [2024-06-14 13:08:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:00,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:08:00,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 13:08:00,760 INFO L175 Difference]: Start difference. First operand has 134 places, 155 transitions, 1429 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:08:00,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 189 transitions, 1915 flow [2024-06-14 13:08:00,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 189 transitions, 1844 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:00,822 INFO L231 Difference]: Finished difference. Result has 136 places, 157 transitions, 1453 flow [2024-06-14 13:08:00,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1453, PETRI_PLACES=136, PETRI_TRANSITIONS=157} [2024-06-14 13:08:00,823 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-14 13:08:00,823 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 157 transitions, 1453 flow [2024-06-14 13:08:00,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:00,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:00,824 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 13:08:00,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:08:00,824 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:00,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:00,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1858321323, now seen corresponding path program 4 times [2024-06-14 13:08:00,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:00,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303798586] [2024-06-14 13:08:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:00,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:03,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:03,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303798586] [2024-06-14 13:08:03,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303798586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:03,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:03,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:03,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019199656] [2024-06-14 13:08:03,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:03,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:03,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:03,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:03,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:03,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:03,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 157 transitions, 1453 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:03,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:03,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:03,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:04,463 INFO L124 PetriNetUnfolderBase]: 1424/2271 cut-off events. [2024-06-14 13:08:04,463 INFO L125 PetriNetUnfolderBase]: For 56856/56876 co-relation queries the response was YES. [2024-06-14 13:08:04,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13516 conditions, 2271 events. 1424/2271 cut-off events. For 56856/56876 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 11438 event pairs, 308 based on Foata normal form. 24/2295 useless extension candidates. Maximal degree in co-relation 13454. Up to 1929 conditions per place. [2024-06-14 13:08:04,476 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 149 selfloop transitions, 38 changer transitions 0/192 dead transitions. [2024-06-14 13:08:04,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 192 transitions, 1951 flow [2024-06-14 13:08:04,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:08:04,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 13:08:04,478 INFO L175 Difference]: Start difference. First operand has 136 places, 157 transitions, 1453 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:08:04,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 192 transitions, 1951 flow [2024-06-14 13:08:04,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 192 transitions, 1874 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:04,520 INFO L231 Difference]: Finished difference. Result has 138 places, 159 transitions, 1489 flow [2024-06-14 13:08:04,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1489, PETRI_PLACES=138, PETRI_TRANSITIONS=159} [2024-06-14 13:08:04,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-14 13:08:04,521 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 159 transitions, 1489 flow [2024-06-14 13:08:04,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:04,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:04,522 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 13:08:04,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:08:04,522 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:04,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:04,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1374144003, now seen corresponding path program 1 times [2024-06-14 13:08:04,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:04,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452792962] [2024-06-14 13:08:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:04,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:06,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:06,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452792962] [2024-06-14 13:08:06,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452792962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:06,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:06,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:08:06,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499204484] [2024-06-14 13:08:06,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:06,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:08:06,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:06,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:08:06,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:08:06,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:08:06,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 159 transitions, 1489 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:06,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:06,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:08:06,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:07,245 INFO L124 PetriNetUnfolderBase]: 1314/2146 cut-off events. [2024-06-14 13:08:07,245 INFO L125 PetriNetUnfolderBase]: For 57915/57949 co-relation queries the response was YES. [2024-06-14 13:08:07,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12963 conditions, 2146 events. 1314/2146 cut-off events. For 57915/57949 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11132 event pairs, 343 based on Foata normal form. 34/2178 useless extension candidates. Maximal degree in co-relation 12900. Up to 1925 conditions per place. [2024-06-14 13:08:07,261 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 142 selfloop transitions, 10 changer transitions 0/173 dead transitions. [2024-06-14 13:08:07,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 173 transitions, 1843 flow [2024-06-14 13:08:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:08:07,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:08:07,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 13:08:07,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 13:08:07,263 INFO L175 Difference]: Start difference. First operand has 138 places, 159 transitions, 1489 flow. Second operand 5 states and 91 transitions. [2024-06-14 13:08:07,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 173 transitions, 1843 flow [2024-06-14 13:08:07,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 173 transitions, 1748 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:07,308 INFO L231 Difference]: Finished difference. Result has 137 places, 162 transitions, 1446 flow [2024-06-14 13:08:07,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1446, PETRI_PLACES=137, PETRI_TRANSITIONS=162} [2024-06-14 13:08:07,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-14 13:08:07,309 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 162 transitions, 1446 flow [2024-06-14 13:08:07,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:07,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:07,310 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 13:08:07,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:08:07,310 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:07,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:07,310 INFO L85 PathProgramCache]: Analyzing trace with hash -533682708, now seen corresponding path program 1 times [2024-06-14 13:08:07,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:07,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424415130] [2024-06-14 13:08:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:07,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:10,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:10,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424415130] [2024-06-14 13:08:10,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424415130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:10,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:10,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:10,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197437662] [2024-06-14 13:08:10,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:10,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:10,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:10,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:10,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:10,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:10,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 162 transitions, 1446 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:10,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:10,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:10,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:12,003 INFO L124 PetriNetUnfolderBase]: 1562/2505 cut-off events. [2024-06-14 13:08:12,004 INFO L125 PetriNetUnfolderBase]: For 73028/73040 co-relation queries the response was YES. [2024-06-14 13:08:12,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15188 conditions, 2505 events. 1562/2505 cut-off events. For 73028/73040 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12991 event pairs, 249 based on Foata normal form. 24/2529 useless extension candidates. Maximal degree in co-relation 15124. Up to 1924 conditions per place. [2024-06-14 13:08:12,027 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 192 selfloop transitions, 28 changer transitions 0/225 dead transitions. [2024-06-14 13:08:12,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 225 transitions, 2248 flow [2024-06-14 13:08:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:08:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:08:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-14 13:08:12,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-14 13:08:12,029 INFO L175 Difference]: Start difference. First operand has 137 places, 162 transitions, 1446 flow. Second operand 10 states and 186 transitions. [2024-06-14 13:08:12,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 225 transitions, 2248 flow [2024-06-14 13:08:12,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 225 transitions, 2218 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:08:12,101 INFO L231 Difference]: Finished difference. Result has 146 places, 167 transitions, 1555 flow [2024-06-14 13:08:12,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1555, PETRI_PLACES=146, PETRI_TRANSITIONS=167} [2024-06-14 13:08:12,108 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-14 13:08:12,108 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 167 transitions, 1555 flow [2024-06-14 13:08:12,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:12,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:12,109 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 13:08:12,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:08:12,109 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:12,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:12,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1935155576, now seen corresponding path program 2 times [2024-06-14 13:08:12,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:12,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678262372] [2024-06-14 13:08:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:12,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:16,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:16,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678262372] [2024-06-14 13:08:16,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678262372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:16,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:16,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:16,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835711810] [2024-06-14 13:08:16,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:16,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:16,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:16,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:16,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:16,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:16,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 167 transitions, 1555 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:16,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:16,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:16,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:17,602 INFO L124 PetriNetUnfolderBase]: 1602/2589 cut-off events. [2024-06-14 13:08:17,602 INFO L125 PetriNetUnfolderBase]: For 78349/78361 co-relation queries the response was YES. [2024-06-14 13:08:17,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15768 conditions, 2589 events. 1602/2589 cut-off events. For 78349/78361 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13640 event pairs, 372 based on Foata normal form. 28/2617 useless extension candidates. Maximal degree in co-relation 15701. Up to 2238 conditions per place. [2024-06-14 13:08:17,622 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 26 changer transitions 0/214 dead transitions. [2024-06-14 13:08:17,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 214 transitions, 2142 flow [2024-06-14 13:08:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:08:17,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 13:08:17,624 INFO L175 Difference]: Start difference. First operand has 146 places, 167 transitions, 1555 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:08:17,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 214 transitions, 2142 flow [2024-06-14 13:08:17,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 214 transitions, 2088 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:17,690 INFO L231 Difference]: Finished difference. Result has 150 places, 168 transitions, 1581 flow [2024-06-14 13:08:17,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1581, PETRI_PLACES=150, PETRI_TRANSITIONS=168} [2024-06-14 13:08:17,691 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-14 13:08:17,691 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 168 transitions, 1581 flow [2024-06-14 13:08:17,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:17,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:17,692 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 13:08:17,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:08:17,692 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:17,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash -684834964, now seen corresponding path program 3 times [2024-06-14 13:08:17,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:17,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576536139] [2024-06-14 13:08:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:17,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:21,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:21,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576536139] [2024-06-14 13:08:21,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576536139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:21,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:21,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:21,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901777766] [2024-06-14 13:08:21,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:21,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:21,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:21,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:21,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:21,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:21,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 168 transitions, 1581 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:21,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:21,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:21,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:22,624 INFO L124 PetriNetUnfolderBase]: 1582/2557 cut-off events. [2024-06-14 13:08:22,625 INFO L125 PetriNetUnfolderBase]: For 76141/76153 co-relation queries the response was YES. [2024-06-14 13:08:22,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15473 conditions, 2557 events. 1582/2557 cut-off events. For 76141/76153 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13423 event pairs, 338 based on Foata normal form. 24/2581 useless extension candidates. Maximal degree in co-relation 15404. Up to 2094 conditions per place. [2024-06-14 13:08:22,644 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 188 selfloop transitions, 27 changer transitions 0/220 dead transitions. [2024-06-14 13:08:22,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 220 transitions, 2222 flow [2024-06-14 13:08:22,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:22,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:08:22,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 13:08:22,646 INFO L175 Difference]: Start difference. First operand has 150 places, 168 transitions, 1581 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:08:22,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 220 transitions, 2222 flow [2024-06-14 13:08:22,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 220 transitions, 2133 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:22,709 INFO L231 Difference]: Finished difference. Result has 153 places, 171 transitions, 1610 flow [2024-06-14 13:08:22,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1610, PETRI_PLACES=153, PETRI_TRANSITIONS=171} [2024-06-14 13:08:22,710 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-14 13:08:22,710 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 171 transitions, 1610 flow [2024-06-14 13:08:22,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:22,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:22,710 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 13:08:22,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:08:22,710 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:22,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1224847232, now seen corresponding path program 4 times [2024-06-14 13:08:22,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:22,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515720785] [2024-06-14 13:08:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:22,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:26,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:26,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515720785] [2024-06-14 13:08:26,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515720785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:26,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:26,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:26,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487833556] [2024-06-14 13:08:26,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:26,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:26,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:26,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:26,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:26,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:26,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 171 transitions, 1610 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:26,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:26,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:26,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:28,004 INFO L124 PetriNetUnfolderBase]: 1650/2681 cut-off events. [2024-06-14 13:08:28,004 INFO L125 PetriNetUnfolderBase]: For 82888/82890 co-relation queries the response was YES. [2024-06-14 13:08:28,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16004 conditions, 2681 events. 1650/2681 cut-off events. For 82888/82890 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14370 event pairs, 394 based on Foata normal form. 16/2696 useless extension candidates. Maximal degree in co-relation 15933. Up to 2162 conditions per place. [2024-06-14 13:08:28,024 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 152 selfloop transitions, 56 changer transitions 0/213 dead transitions. [2024-06-14 13:08:28,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 213 transitions, 2174 flow [2024-06-14 13:08:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:28,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:08:28,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:08:28,028 INFO L175 Difference]: Start difference. First operand has 153 places, 171 transitions, 1610 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:08:28,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 213 transitions, 2174 flow [2024-06-14 13:08:28,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 213 transitions, 2142 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:28,104 INFO L231 Difference]: Finished difference. Result has 157 places, 172 transitions, 1717 flow [2024-06-14 13:08:28,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1717, PETRI_PLACES=157, PETRI_TRANSITIONS=172} [2024-06-14 13:08:28,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-14 13:08:28,104 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 172 transitions, 1717 flow [2024-06-14 13:08:28,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:28,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:28,105 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 13:08:28,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:08:28,105 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:28,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:28,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1224699362, now seen corresponding path program 5 times [2024-06-14 13:08:28,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:28,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439044376] [2024-06-14 13:08:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:28,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:31,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:31,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439044376] [2024-06-14 13:08:31,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439044376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:31,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:31,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:31,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992372013] [2024-06-14 13:08:31,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:31,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:31,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:31,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:31,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:31,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:31,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 172 transitions, 1717 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:31,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:31,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:31,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:32,784 INFO L124 PetriNetUnfolderBase]: 1794/2937 cut-off events. [2024-06-14 13:08:32,784 INFO L125 PetriNetUnfolderBase]: For 95588/95590 co-relation queries the response was YES. [2024-06-14 13:08:32,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17981 conditions, 2937 events. 1794/2937 cut-off events. For 95588/95590 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16363 event pairs, 420 based on Foata normal form. 12/2948 useless extension candidates. Maximal degree in co-relation 17908. Up to 2152 conditions per place. [2024-06-14 13:08:32,807 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 158 selfloop transitions, 58 changer transitions 0/221 dead transitions. [2024-06-14 13:08:32,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 221 transitions, 2471 flow [2024-06-14 13:08:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:32,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 13:08:32,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 13:08:32,810 INFO L175 Difference]: Start difference. First operand has 157 places, 172 transitions, 1717 flow. Second operand 9 states and 172 transitions. [2024-06-14 13:08:32,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 221 transitions, 2471 flow [2024-06-14 13:08:32,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 221 transitions, 2350 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:32,896 INFO L231 Difference]: Finished difference. Result has 160 places, 175 transitions, 1774 flow [2024-06-14 13:08:32,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1596, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1774, PETRI_PLACES=160, PETRI_TRANSITIONS=175} [2024-06-14 13:08:32,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-14 13:08:32,897 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 175 transitions, 1774 flow [2024-06-14 13:08:32,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:32,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:32,897 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 13:08:32,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:08:32,897 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:32,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:32,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2079046106, now seen corresponding path program 6 times [2024-06-14 13:08:32,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:32,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185636697] [2024-06-14 13:08:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:32,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:35,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:35,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185636697] [2024-06-14 13:08:35,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185636697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:35,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:35,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:35,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909981083] [2024-06-14 13:08:35,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:35,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:35,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:35,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:35,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:35,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:35,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 175 transitions, 1774 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:35,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:35,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:35,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:37,547 INFO L124 PetriNetUnfolderBase]: 1766/2893 cut-off events. [2024-06-14 13:08:37,547 INFO L125 PetriNetUnfolderBase]: For 94168/94170 co-relation queries the response was YES. [2024-06-14 13:08:37,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17442 conditions, 2893 events. 1766/2893 cut-off events. For 94168/94170 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16102 event pairs, 424 based on Foata normal form. 16/2908 useless extension candidates. Maximal degree in co-relation 17367. Up to 2362 conditions per place. [2024-06-14 13:08:37,567 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 154 selfloop transitions, 58 changer transitions 0/217 dead transitions. [2024-06-14 13:08:37,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 217 transitions, 2351 flow [2024-06-14 13:08:37,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:37,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:08:37,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 13:08:37,569 INFO L175 Difference]: Start difference. First operand has 160 places, 175 transitions, 1774 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:08:37,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 217 transitions, 2351 flow [2024-06-14 13:08:37,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 217 transitions, 2248 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:37,662 INFO L231 Difference]: Finished difference. Result has 164 places, 176 transitions, 1819 flow [2024-06-14 13:08:37,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1819, PETRI_PLACES=164, PETRI_TRANSITIONS=176} [2024-06-14 13:08:37,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-14 13:08:37,663 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 176 transitions, 1819 flow [2024-06-14 13:08:37,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:37,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:37,663 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 13:08:37,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:08:37,663 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:37,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:37,664 INFO L85 PathProgramCache]: Analyzing trace with hash -540581362, now seen corresponding path program 1 times [2024-06-14 13:08:37,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:37,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570539492] [2024-06-14 13:08:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:37,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:41,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:41,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570539492] [2024-06-14 13:08:41,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570539492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:41,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:41,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:41,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457491857] [2024-06-14 13:08:41,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:41,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:41,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:41,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:41,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:41,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 176 transitions, 1819 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:41,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:41,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:41,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:42,609 INFO L124 PetriNetUnfolderBase]: 1814/2989 cut-off events. [2024-06-14 13:08:42,610 INFO L125 PetriNetUnfolderBase]: For 96064/96066 co-relation queries the response was YES. [2024-06-14 13:08:42,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17993 conditions, 2989 events. 1814/2989 cut-off events. For 96064/96066 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16890 event pairs, 420 based on Foata normal form. 12/3000 useless extension candidates. Maximal degree in co-relation 17916. Up to 2116 conditions per place. [2024-06-14 13:08:42,631 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 154 selfloop transitions, 62 changer transitions 0/221 dead transitions. [2024-06-14 13:08:42,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 221 transitions, 2419 flow [2024-06-14 13:08:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:08:42,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 13:08:42,633 INFO L175 Difference]: Start difference. First operand has 164 places, 176 transitions, 1819 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:08:42,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 221 transitions, 2419 flow [2024-06-14 13:08:42,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 221 transitions, 2304 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:42,729 INFO L231 Difference]: Finished difference. Result has 166 places, 177 transitions, 1858 flow [2024-06-14 13:08:42,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1704, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1858, PETRI_PLACES=166, PETRI_TRANSITIONS=177} [2024-06-14 13:08:42,729 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-14 13:08:42,730 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 177 transitions, 1858 flow [2024-06-14 13:08:42,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:42,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:42,730 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 13:08:42,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:08:42,730 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:42,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:42,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1519554384, now seen corresponding path program 7 times [2024-06-14 13:08:42,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:42,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8390240] [2024-06-14 13:08:42,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:42,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:46,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:46,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8390240] [2024-06-14 13:08:46,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8390240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:46,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:46,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:46,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093576771] [2024-06-14 13:08:46,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:46,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:46,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:46,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:46,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:46,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:46,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 177 transitions, 1858 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:46,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:46,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:46,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:47,871 INFO L124 PetriNetUnfolderBase]: 1882/3104 cut-off events. [2024-06-14 13:08:47,871 INFO L125 PetriNetUnfolderBase]: For 105370/105382 co-relation queries the response was YES. [2024-06-14 13:08:47,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18752 conditions, 3104 events. 1882/3104 cut-off events. For 105370/105382 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17756 event pairs, 458 based on Foata normal form. 20/3123 useless extension candidates. Maximal degree in co-relation 18674. Up to 2562 conditions per place. [2024-06-14 13:08:47,898 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 151 selfloop transitions, 60 changer transitions 0/216 dead transitions. [2024-06-14 13:08:47,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 216 transitions, 2426 flow [2024-06-14 13:08:47,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:47,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:08:47,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:08:47,900 INFO L175 Difference]: Start difference. First operand has 166 places, 177 transitions, 1858 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:08:47,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 216 transitions, 2426 flow [2024-06-14 13:08:48,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 216 transitions, 2286 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:48,012 INFO L231 Difference]: Finished difference. Result has 168 places, 178 transitions, 1871 flow [2024-06-14 13:08:48,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1871, PETRI_PLACES=168, PETRI_TRANSITIONS=178} [2024-06-14 13:08:48,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-14 13:08:48,012 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 178 transitions, 1871 flow [2024-06-14 13:08:48,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:48,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:48,013 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 13:08:48,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:08:48,013 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:48,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:48,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2130491028, now seen corresponding path program 8 times [2024-06-14 13:08:48,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:48,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742873793] [2024-06-14 13:08:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:48,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:50,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:50,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742873793] [2024-06-14 13:08:50,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742873793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:50,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:50,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:50,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882725404] [2024-06-14 13:08:50,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:50,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:51,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:51,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:51,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:51,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:51,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 178 transitions, 1871 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:51,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:51,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:51,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:52,916 INFO L124 PetriNetUnfolderBase]: 1950/3208 cut-off events. [2024-06-14 13:08:52,916 INFO L125 PetriNetUnfolderBase]: For 111548/111560 co-relation queries the response was YES. [2024-06-14 13:08:52,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19328 conditions, 3208 events. 1950/3208 cut-off events. For 111548/111560 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18459 event pairs, 464 based on Foata normal form. 20/3227 useless extension candidates. Maximal degree in co-relation 19249. Up to 2678 conditions per place. [2024-06-14 13:08:52,938 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 156 selfloop transitions, 56 changer transitions 0/217 dead transitions. [2024-06-14 13:08:52,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 217 transitions, 2443 flow [2024-06-14 13:08:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:52,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:08:52,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 13:08:52,959 INFO L175 Difference]: Start difference. First operand has 168 places, 178 transitions, 1871 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:08:52,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 217 transitions, 2443 flow [2024-06-14 13:08:53,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 217 transitions, 2308 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:53,082 INFO L231 Difference]: Finished difference. Result has 170 places, 179 transitions, 1883 flow [2024-06-14 13:08:53,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1883, PETRI_PLACES=170, PETRI_TRANSITIONS=179} [2024-06-14 13:08:53,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-14 13:08:53,084 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 179 transitions, 1883 flow [2024-06-14 13:08:53,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:53,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:53,084 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 13:08:53,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:08:53,084 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:53,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:53,085 INFO L85 PathProgramCache]: Analyzing trace with hash -519660898, now seen corresponding path program 9 times [2024-06-14 13:08:53,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:53,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728963401] [2024-06-14 13:08:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:53,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:56,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:56,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728963401] [2024-06-14 13:08:56,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728963401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:56,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:56,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:56,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636660111] [2024-06-14 13:08:56,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:56,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:56,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:56,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:56,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:08:56,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 179 transitions, 1883 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:56,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:56,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:08:56,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:58,457 INFO L124 PetriNetUnfolderBase]: 2018/3348 cut-off events. [2024-06-14 13:08:58,457 INFO L125 PetriNetUnfolderBase]: For 117798/117810 co-relation queries the response was YES. [2024-06-14 13:08:58,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19942 conditions, 3348 events. 2018/3348 cut-off events. For 117798/117810 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19665 event pairs, 488 based on Foata normal form. 20/3367 useless extension candidates. Maximal degree in co-relation 19862. Up to 2794 conditions per place. [2024-06-14 13:08:58,486 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 156 selfloop transitions, 57 changer transitions 0/218 dead transitions. [2024-06-14 13:08:58,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 218 transitions, 2459 flow [2024-06-14 13:08:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:58,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:08:58,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 13:08:58,488 INFO L175 Difference]: Start difference. First operand has 170 places, 179 transitions, 1883 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:08:58,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 218 transitions, 2459 flow [2024-06-14 13:08:58,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 218 transitions, 2330 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:58,604 INFO L231 Difference]: Finished difference. Result has 172 places, 180 transitions, 1905 flow [2024-06-14 13:08:58,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1905, PETRI_PLACES=172, PETRI_TRANSITIONS=180} [2024-06-14 13:08:58,604 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-14 13:08:58,604 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 180 transitions, 1905 flow [2024-06-14 13:08:58,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:58,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:58,605 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 13:08:58,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:08:58,605 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:58,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:58,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1606545004, now seen corresponding path program 10 times [2024-06-14 13:08:58,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:58,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165234939] [2024-06-14 13:08:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:58,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:01,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:01,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165234939] [2024-06-14 13:09:01,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165234939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:01,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:01,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:01,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5507962] [2024-06-14 13:09:01,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:01,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:01,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:01,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:01,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:01,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:01,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 180 transitions, 1905 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:01,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:01,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:01,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:03,196 INFO L124 PetriNetUnfolderBase]: 2038/3388 cut-off events. [2024-06-14 13:09:03,196 INFO L125 PetriNetUnfolderBase]: For 117059/117071 co-relation queries the response was YES. [2024-06-14 13:09:03,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19980 conditions, 3388 events. 2038/3388 cut-off events. For 117059/117071 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19922 event pairs, 478 based on Foata normal form. 16/3403 useless extension candidates. Maximal degree in co-relation 19899. Up to 2504 conditions per place. [2024-06-14 13:09:03,225 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 158 selfloop transitions, 61 changer transitions 0/224 dead transitions. [2024-06-14 13:09:03,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 224 transitions, 2543 flow [2024-06-14 13:09:03,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:03,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:03,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:09:03,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:09:03,226 INFO L175 Difference]: Start difference. First operand has 172 places, 180 transitions, 1905 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:09:03,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 224 transitions, 2543 flow [2024-06-14 13:09:03,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 224 transitions, 2410 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:09:03,371 INFO L231 Difference]: Finished difference. Result has 175 places, 183 transitions, 1980 flow [2024-06-14 13:09:03,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1980, PETRI_PLACES=175, PETRI_TRANSITIONS=183} [2024-06-14 13:09:03,372 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 131 predicate places. [2024-06-14 13:09:03,372 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 183 transitions, 1980 flow [2024-06-14 13:09:03,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:03,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:03,372 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 13:09:03,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:09:03,372 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:03,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:03,373 INFO L85 PathProgramCache]: Analyzing trace with hash -514083316, now seen corresponding path program 2 times [2024-06-14 13:09:03,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:03,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208989637] [2024-06-14 13:09:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:03,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:06,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:06,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208989637] [2024-06-14 13:09:06,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208989637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:06,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:06,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:06,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221068387] [2024-06-14 13:09:06,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:06,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:06,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:06,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:06,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:06,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:06,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 183 transitions, 1980 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:06,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:06,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:06,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:08,291 INFO L124 PetriNetUnfolderBase]: 2086/3484 cut-off events. [2024-06-14 13:09:08,291 INFO L125 PetriNetUnfolderBase]: For 123028/123040 co-relation queries the response was YES. [2024-06-14 13:09:08,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20533 conditions, 3484 events. 2086/3484 cut-off events. For 123028/123040 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20768 event pairs, 498 based on Foata normal form. 16/3499 useless extension candidates. Maximal degree in co-relation 20450. Up to 2700 conditions per place. [2024-06-14 13:09:08,334 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 161 selfloop transitions, 59 changer transitions 0/225 dead transitions. [2024-06-14 13:09:08,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 225 transitions, 2590 flow [2024-06-14 13:09:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 13:09:08,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-14 13:09:08,337 INFO L175 Difference]: Start difference. First operand has 175 places, 183 transitions, 1980 flow. Second operand 9 states and 166 transitions. [2024-06-14 13:09:08,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 225 transitions, 2590 flow [2024-06-14 13:09:08,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 225 transitions, 2481 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:08,497 INFO L231 Difference]: Finished difference. Result has 179 places, 184 transitions, 2029 flow [2024-06-14 13:09:08,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2029, PETRI_PLACES=179, PETRI_TRANSITIONS=184} [2024-06-14 13:09:08,498 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 135 predicate places. [2024-06-14 13:09:08,498 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 184 transitions, 2029 flow [2024-06-14 13:09:08,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:08,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:08,498 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 13:09:08,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:09:08,499 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:08,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:08,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1782581748, now seen corresponding path program 3 times [2024-06-14 13:09:08,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:08,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722643213] [2024-06-14 13:09:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:08,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:11,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:11,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722643213] [2024-06-14 13:09:11,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722643213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:11,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:11,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:11,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193242530] [2024-06-14 13:09:11,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:11,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:11,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:11,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:11,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:11,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 184 transitions, 2029 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:11,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:11,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:11,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:13,271 INFO L124 PetriNetUnfolderBase]: 2134/3580 cut-off events. [2024-06-14 13:09:13,271 INFO L125 PetriNetUnfolderBase]: For 129088/129100 co-relation queries the response was YES. [2024-06-14 13:09:13,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21206 conditions, 3580 events. 2134/3580 cut-off events. For 129088/129100 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 21584 event pairs, 516 based on Foata normal form. 16/3595 useless extension candidates. Maximal degree in co-relation 21121. Up to 2896 conditions per place. [2024-06-14 13:09:13,296 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 159 selfloop transitions, 62 changer transitions 0/226 dead transitions. [2024-06-14 13:09:13,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 226 transitions, 2643 flow [2024-06-14 13:09:13,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:09:13,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:09:13,298 INFO L175 Difference]: Start difference. First operand has 179 places, 184 transitions, 2029 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:09:13,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 226 transitions, 2643 flow [2024-06-14 13:09:13,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 226 transitions, 2499 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:09:13,456 INFO L231 Difference]: Finished difference. Result has 181 places, 185 transitions, 2051 flow [2024-06-14 13:09:13,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1885, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2051, PETRI_PLACES=181, PETRI_TRANSITIONS=185} [2024-06-14 13:09:13,457 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-14 13:09:13,457 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 185 transitions, 2051 flow [2024-06-14 13:09:13,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:13,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:13,457 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 13:09:13,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:09:13,457 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:13,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:13,458 INFO L85 PathProgramCache]: Analyzing trace with hash 905389808, now seen corresponding path program 4 times [2024-06-14 13:09:13,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:13,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404356934] [2024-06-14 13:09:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:13,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:16,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:16,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404356934] [2024-06-14 13:09:16,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404356934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:16,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:16,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:16,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323691515] [2024-06-14 13:09:16,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:16,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:16,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:16,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:16,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:16,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:16,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 185 transitions, 2051 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:16,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:16,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:16,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:18,049 INFO L124 PetriNetUnfolderBase]: 2114/3548 cut-off events. [2024-06-14 13:09:18,049 INFO L125 PetriNetUnfolderBase]: For 123483/123495 co-relation queries the response was YES. [2024-06-14 13:09:18,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20530 conditions, 3548 events. 2114/3548 cut-off events. For 123483/123495 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21302 event pairs, 451 based on Foata normal form. 16/3563 useless extension candidates. Maximal degree in co-relation 20444. Up to 1958 conditions per place. [2024-06-14 13:09:18,077 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 147 selfloop transitions, 74 changer transitions 0/226 dead transitions. [2024-06-14 13:09:18,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 226 transitions, 2549 flow [2024-06-14 13:09:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:18,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:18,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:09:18,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 13:09:18,079 INFO L175 Difference]: Start difference. First operand has 181 places, 185 transitions, 2051 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:09:18,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 226 transitions, 2549 flow [2024-06-14 13:09:18,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 226 transitions, 2397 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:09:18,243 INFO L231 Difference]: Finished difference. Result has 182 places, 184 transitions, 1967 flow [2024-06-14 13:09:18,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1815, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1967, PETRI_PLACES=182, PETRI_TRANSITIONS=184} [2024-06-14 13:09:18,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-14 13:09:18,244 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 184 transitions, 1967 flow [2024-06-14 13:09:18,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:18,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:18,244 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 13:09:18,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:09:18,245 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:18,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:18,245 INFO L85 PathProgramCache]: Analyzing trace with hash 186731906, now seen corresponding path program 1 times [2024-06-14 13:09:18,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:18,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842431313] [2024-06-14 13:09:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:18,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:21,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:21,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842431313] [2024-06-14 13:09:21,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842431313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:21,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:21,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:21,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531580710] [2024-06-14 13:09:21,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:21,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:21,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:21,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:21,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:21,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:09:21,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 184 transitions, 1967 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:21,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:21,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:09:21,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:22,691 INFO L124 PetriNetUnfolderBase]: 2022/3443 cut-off events. [2024-06-14 13:09:22,692 INFO L125 PetriNetUnfolderBase]: For 123772/123806 co-relation queries the response was YES. [2024-06-14 13:09:22,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20350 conditions, 3443 events. 2022/3443 cut-off events. For 123772/123806 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 21207 event pairs, 481 based on Foata normal form. 36/3453 useless extension candidates. Maximal degree in co-relation 20263. Up to 3049 conditions per place. [2024-06-14 13:09:22,720 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 156 selfloop transitions, 41 changer transitions 0/218 dead transitions. [2024-06-14 13:09:22,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 218 transitions, 2608 flow [2024-06-14 13:09:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:09:22,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-14 13:09:22,722 INFO L175 Difference]: Start difference. First operand has 182 places, 184 transitions, 1967 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:09:22,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 218 transitions, 2608 flow [2024-06-14 13:09:22,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 218 transitions, 2332 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-14 13:09:22,851 INFO L231 Difference]: Finished difference. Result has 180 places, 195 transitions, 1890 flow [2024-06-14 13:09:22,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1890, PETRI_PLACES=180, PETRI_TRANSITIONS=195} [2024-06-14 13:09:22,852 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 136 predicate places. [2024-06-14 13:09:22,852 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 195 transitions, 1890 flow [2024-06-14 13:09:22,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:22,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:22,852 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 13:09:22,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:09:22,852 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:22,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:22,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1718045408, now seen corresponding path program 2 times [2024-06-14 13:09:22,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:22,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113244377] [2024-06-14 13:09:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:22,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:25,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:25,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113244377] [2024-06-14 13:09:25,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113244377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:25,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:25,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:25,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442965303] [2024-06-14 13:09:25,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:25,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:25,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:25,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:25,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:25,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:09:25,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 195 transitions, 1890 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:25,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:25,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:09:25,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:26,730 INFO L124 PetriNetUnfolderBase]: 2008/3413 cut-off events. [2024-06-14 13:09:26,731 INFO L125 PetriNetUnfolderBase]: For 123673/123696 co-relation queries the response was YES. [2024-06-14 13:09:26,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19485 conditions, 3413 events. 2008/3413 cut-off events. For 123673/123696 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21045 event pairs, 488 based on Foata normal form. 26/3408 useless extension candidates. Maximal degree in co-relation 19400. Up to 3021 conditions per place. [2024-06-14 13:09:26,758 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 148 selfloop transitions, 43 changer transitions 0/212 dead transitions. [2024-06-14 13:09:26,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 212 transitions, 2428 flow [2024-06-14 13:09:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:09:26,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:09:26,760 INFO L175 Difference]: Start difference. First operand has 180 places, 195 transitions, 1890 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:09:26,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 212 transitions, 2428 flow [2024-06-14 13:09:26,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 212 transitions, 2384 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 13:09:26,921 INFO L231 Difference]: Finished difference. Result has 184 places, 198 transitions, 1976 flow [2024-06-14 13:09:26,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1846, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1976, PETRI_PLACES=184, PETRI_TRANSITIONS=198} [2024-06-14 13:09:26,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-14 13:09:26,922 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 198 transitions, 1976 flow [2024-06-14 13:09:26,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:26,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:26,922 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 13:09:26,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:09:26,923 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:26,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:26,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1718461118, now seen corresponding path program 3 times [2024-06-14 13:09:26,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:26,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300380424] [2024-06-14 13:09:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:26,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:29,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:29,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300380424] [2024-06-14 13:09:29,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300380424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:29,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:29,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:29,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654095876] [2024-06-14 13:09:29,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:29,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:29,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:29,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:29,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:29,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:09:29,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 198 transitions, 1976 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:29,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:29,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:09:29,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:31,060 INFO L124 PetriNetUnfolderBase]: 1997/3410 cut-off events. [2024-06-14 13:09:31,060 INFO L125 PetriNetUnfolderBase]: For 125638/125649 co-relation queries the response was YES. [2024-06-14 13:09:31,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19780 conditions, 3410 events. 1997/3410 cut-off events. For 125638/125649 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21090 event pairs, 478 based on Foata normal form. 13/3397 useless extension candidates. Maximal degree in co-relation 19693. Up to 3027 conditions per place. [2024-06-14 13:09:31,090 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 157 selfloop transitions, 39 changer transitions 0/217 dead transitions. [2024-06-14 13:09:31,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 217 transitions, 2420 flow [2024-06-14 13:09:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-14 13:09:31,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-14 13:09:31,092 INFO L175 Difference]: Start difference. First operand has 184 places, 198 transitions, 1976 flow. Second operand 6 states and 112 transitions. [2024-06-14 13:09:31,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 217 transitions, 2420 flow [2024-06-14 13:09:31,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 217 transitions, 2296 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 13:09:31,261 INFO L231 Difference]: Finished difference. Result has 186 places, 198 transitions, 1945 flow [2024-06-14 13:09:31,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1852, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1945, PETRI_PLACES=186, PETRI_TRANSITIONS=198} [2024-06-14 13:09:31,262 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-14 13:09:31,262 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 198 transitions, 1945 flow [2024-06-14 13:09:31,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:31,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:31,262 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 13:09:31,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:09:31,266 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:31,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1819999368, now seen corresponding path program 1 times [2024-06-14 13:09:31,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:31,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312465533] [2024-06-14 13:09:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:31,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:33,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:33,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312465533] [2024-06-14 13:09:33,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312465533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:33,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:33,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:33,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707613449] [2024-06-14 13:09:33,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:33,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:33,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:33,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:33,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:33,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:33,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 198 transitions, 1945 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:33,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:33,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:33,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:34,834 INFO L124 PetriNetUnfolderBase]: 2157/3620 cut-off events. [2024-06-14 13:09:34,835 INFO L125 PetriNetUnfolderBase]: For 128309/128311 co-relation queries the response was YES. [2024-06-14 13:09:34,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20749 conditions, 3620 events. 2157/3620 cut-off events. For 128309/128311 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22001 event pairs, 514 based on Foata normal form. 1/3621 useless extension candidates. Maximal degree in co-relation 20661. Up to 3378 conditions per place. [2024-06-14 13:09:34,866 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 199 selfloop transitions, 21 changer transitions 0/225 dead transitions. [2024-06-14 13:09:34,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 225 transitions, 2623 flow [2024-06-14 13:09:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:09:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:09:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:09:34,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 13:09:34,868 INFO L175 Difference]: Start difference. First operand has 186 places, 198 transitions, 1945 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:09:34,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 225 transitions, 2623 flow [2024-06-14 13:09:35,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 225 transitions, 2533 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:35,036 INFO L231 Difference]: Finished difference. Result has 187 places, 204 transitions, 1999 flow [2024-06-14 13:09:35,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1999, PETRI_PLACES=187, PETRI_TRANSITIONS=204} [2024-06-14 13:09:35,037 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-14 13:09:35,037 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 204 transitions, 1999 flow [2024-06-14 13:09:35,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:35,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:35,037 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 13:09:35,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:09:35,037 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:35,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:35,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1820119524, now seen corresponding path program 1 times [2024-06-14 13:09:35,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:35,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621695142] [2024-06-14 13:09:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:35,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:37,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:37,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621695142] [2024-06-14 13:09:37,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621695142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:37,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:37,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:37,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891139833] [2024-06-14 13:09:37,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:37,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:37,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:37,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:37,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:37,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:37,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 204 transitions, 1999 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:37,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:37,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:37,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:38,682 INFO L124 PetriNetUnfolderBase]: 2172/3641 cut-off events. [2024-06-14 13:09:38,682 INFO L125 PetriNetUnfolderBase]: For 130365/130367 co-relation queries the response was YES. [2024-06-14 13:09:38,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21082 conditions, 3641 events. 2172/3641 cut-off events. For 130365/130367 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22087 event pairs, 511 based on Foata normal form. 2/3643 useless extension candidates. Maximal degree in co-relation 20994. Up to 3391 conditions per place. [2024-06-14 13:09:38,714 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 205 selfloop transitions, 23 changer transitions 0/233 dead transitions. [2024-06-14 13:09:38,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 233 transitions, 2703 flow [2024-06-14 13:09:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:09:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:09:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-14 13:09:38,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-14 13:09:38,716 INFO L175 Difference]: Start difference. First operand has 187 places, 204 transitions, 1999 flow. Second operand 7 states and 120 transitions. [2024-06-14 13:09:38,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 233 transitions, 2703 flow [2024-06-14 13:09:38,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 233 transitions, 2641 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 13:09:38,895 INFO L231 Difference]: Finished difference. Result has 192 places, 213 transitions, 2105 flow [2024-06-14 13:09:38,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1940, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2105, PETRI_PLACES=192, PETRI_TRANSITIONS=213} [2024-06-14 13:09:38,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-14 13:09:38,896 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 213 transitions, 2105 flow [2024-06-14 13:09:38,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:38,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:38,896 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 13:09:38,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:09:38,896 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:38,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:38,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1820119338, now seen corresponding path program 2 times [2024-06-14 13:09:38,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:38,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499134494] [2024-06-14 13:09:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:38,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:41,077 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 13:09:41,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:41,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499134494] [2024-06-14 13:09:41,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499134494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:41,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:41,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:41,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348985204] [2024-06-14 13:09:41,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:41,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:41,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:41,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:41,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:41,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:41,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 213 transitions, 2105 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:41,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:41,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:41,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:42,353 INFO L124 PetriNetUnfolderBase]: 2177/3650 cut-off events. [2024-06-14 13:09:42,353 INFO L125 PetriNetUnfolderBase]: For 135210/135212 co-relation queries the response was YES. [2024-06-14 13:09:42,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21461 conditions, 3650 events. 2177/3650 cut-off events. For 135210/135212 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22141 event pairs, 515 based on Foata normal form. 1/3651 useless extension candidates. Maximal degree in co-relation 21370. Up to 3420 conditions per place. [2024-06-14 13:09:42,386 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 208 selfloop transitions, 19 changer transitions 0/232 dead transitions. [2024-06-14 13:09:42,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 232 transitions, 2647 flow [2024-06-14 13:09:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:09:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:09:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 13:09:42,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-14 13:09:42,387 INFO L175 Difference]: Start difference. First operand has 192 places, 213 transitions, 2105 flow. Second operand 7 states and 114 transitions. [2024-06-14 13:09:42,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 232 transitions, 2647 flow [2024-06-14 13:09:42,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 232 transitions, 2597 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 13:09:42,532 INFO L231 Difference]: Finished difference. Result has 197 places, 216 transitions, 2149 flow [2024-06-14 13:09:42,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2149, PETRI_PLACES=197, PETRI_TRANSITIONS=216} [2024-06-14 13:09:42,533 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-14 13:09:42,533 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 216 transitions, 2149 flow [2024-06-14 13:09:42,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:42,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:42,533 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 13:09:42,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:09:42,533 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:42,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1718039456, now seen corresponding path program 2 times [2024-06-14 13:09:42,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:42,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351971061] [2024-06-14 13:09:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:42,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:44,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:44,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351971061] [2024-06-14 13:09:44,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351971061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:44,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:44,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:44,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765475379] [2024-06-14 13:09:44,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:44,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:44,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:44,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:44,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:44,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:44,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 216 transitions, 2149 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:44,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:44,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:44,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:45,782 INFO L124 PetriNetUnfolderBase]: 2187/3665 cut-off events. [2024-06-14 13:09:45,783 INFO L125 PetriNetUnfolderBase]: For 141897/141901 co-relation queries the response was YES. [2024-06-14 13:09:45,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21661 conditions, 3665 events. 2187/3665 cut-off events. For 141897/141901 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 22272 event pairs, 516 based on Foata normal form. 4/3669 useless extension candidates. Maximal degree in co-relation 21568. Up to 3408 conditions per place. [2024-06-14 13:09:45,816 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 203 selfloop transitions, 25 changer transitions 0/233 dead transitions. [2024-06-14 13:09:45,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 233 transitions, 2777 flow [2024-06-14 13:09:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 13:09:45,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:09:45,821 INFO L175 Difference]: Start difference. First operand has 197 places, 216 transitions, 2149 flow. Second operand 6 states and 102 transitions. [2024-06-14 13:09:45,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 233 transitions, 2777 flow [2024-06-14 13:09:46,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 233 transitions, 2703 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:46,005 INFO L231 Difference]: Finished difference. Result has 197 places, 219 transitions, 2171 flow [2024-06-14 13:09:46,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2171, PETRI_PLACES=197, PETRI_TRANSITIONS=219} [2024-06-14 13:09:46,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-14 13:09:46,006 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 219 transitions, 2171 flow [2024-06-14 13:09:46,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:46,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:46,006 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 13:09:46,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:09:46,028 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:46,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:46,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1718276792, now seen corresponding path program 3 times [2024-06-14 13:09:46,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:46,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890252088] [2024-06-14 13:09:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:46,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:46,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:48,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:48,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890252088] [2024-06-14 13:09:48,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890252088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:48,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:48,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:48,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632400931] [2024-06-14 13:09:48,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:48,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:48,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:48,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:48,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:48,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:48,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 219 transitions, 2171 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:48,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:48,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:48,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:49,355 INFO L124 PetriNetUnfolderBase]: 2184/3660 cut-off events. [2024-06-14 13:09:49,355 INFO L125 PetriNetUnfolderBase]: For 144462/144464 co-relation queries the response was YES. [2024-06-14 13:09:49,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21691 conditions, 3660 events. 2184/3660 cut-off events. For 144462/144464 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22247 event pairs, 515 based on Foata normal form. 1/3661 useless extension candidates. Maximal degree in co-relation 21598. Up to 3416 conditions per place. [2024-06-14 13:09:49,387 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 209 selfloop transitions, 24 changer transitions 0/238 dead transitions. [2024-06-14 13:09:49,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 238 transitions, 2691 flow [2024-06-14 13:09:49,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:49,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:09:49,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:09:49,389 INFO L175 Difference]: Start difference. First operand has 197 places, 219 transitions, 2171 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:09:49,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 238 transitions, 2691 flow [2024-06-14 13:09:49,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 238 transitions, 2599 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 13:09:49,576 INFO L231 Difference]: Finished difference. Result has 200 places, 219 transitions, 2141 flow [2024-06-14 13:09:49,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2141, PETRI_PLACES=200, PETRI_TRANSITIONS=219} [2024-06-14 13:09:49,577 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-14 13:09:49,577 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 219 transitions, 2141 flow [2024-06-14 13:09:49,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:49,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:49,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:49,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:09:49,578 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:49,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:49,578 INFO L85 PathProgramCache]: Analyzing trace with hash -666364842, now seen corresponding path program 3 times [2024-06-14 13:09:49,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:49,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9180563] [2024-06-14 13:09:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:49,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:51,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:51,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9180563] [2024-06-14 13:09:51,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9180563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:51,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:51,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:09:51,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956947302] [2024-06-14 13:09:51,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:51,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:09:51,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:51,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:09:51,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:09:51,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:51,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 219 transitions, 2141 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:51,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:51,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:51,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:52,806 INFO L124 PetriNetUnfolderBase]: 2178/3652 cut-off events. [2024-06-14 13:09:52,806 INFO L125 PetriNetUnfolderBase]: For 148292/148294 co-relation queries the response was YES. [2024-06-14 13:09:52,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21590 conditions, 3652 events. 2178/3652 cut-off events. For 148292/148294 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22172 event pairs, 510 based on Foata normal form. 2/3654 useless extension candidates. Maximal degree in co-relation 21496. Up to 3399 conditions per place. [2024-06-14 13:09:52,837 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 206 selfloop transitions, 26 changer transitions 0/237 dead transitions. [2024-06-14 13:09:52,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 237 transitions, 2653 flow [2024-06-14 13:09:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:52,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:52,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:09:52,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 13:09:52,839 INFO L175 Difference]: Start difference. First operand has 200 places, 219 transitions, 2141 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:09:52,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 237 transitions, 2653 flow [2024-06-14 13:09:53,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 237 transitions, 2581 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:53,018 INFO L231 Difference]: Finished difference. Result has 201 places, 219 transitions, 2131 flow [2024-06-14 13:09:53,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2131, PETRI_PLACES=201, PETRI_TRANSITIONS=219} [2024-06-14 13:09:53,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 13:09:53,019 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 219 transitions, 2131 flow [2024-06-14 13:09:53,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:53,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:53,019 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 13:09:53,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:09:53,020 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:53,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1718030528, now seen corresponding path program 1 times [2024-06-14 13:09:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:53,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105238851] [2024-06-14 13:09:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:53,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:55,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:55,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105238851] [2024-06-14 13:09:55,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105238851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:55,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:55,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:55,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068505577] [2024-06-14 13:09:55,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:55,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:55,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:55,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:55,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:56,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:09:56,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 219 transitions, 2131 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:56,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:56,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:09:56,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:56,981 INFO L124 PetriNetUnfolderBase]: 2018/3445 cut-off events. [2024-06-14 13:09:56,981 INFO L125 PetriNetUnfolderBase]: For 144708/144719 co-relation queries the response was YES. [2024-06-14 13:09:57,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20571 conditions, 3445 events. 2018/3445 cut-off events. For 144708/144719 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21307 event pairs, 477 based on Foata normal form. 11/3430 useless extension candidates. Maximal degree in co-relation 20476. Up to 3128 conditions per place. [2024-06-14 13:09:57,014 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 201 selfloop transitions, 12 changer transitions 0/234 dead transitions. [2024-06-14 13:09:57,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 234 transitions, 2621 flow [2024-06-14 13:09:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:09:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:09:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 13:09:57,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-14 13:09:57,016 INFO L175 Difference]: Start difference. First operand has 201 places, 219 transitions, 2131 flow. Second operand 6 states and 103 transitions. [2024-06-14 13:09:57,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 234 transitions, 2621 flow [2024-06-14 13:09:57,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 234 transitions, 2559 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:57,220 INFO L231 Difference]: Finished difference. Result has 201 places, 221 transitions, 2132 flow [2024-06-14 13:09:57,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2132, PETRI_PLACES=201, PETRI_TRANSITIONS=221} [2024-06-14 13:09:57,221 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 13:09:57,221 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 221 transitions, 2132 flow [2024-06-14 13:09:57,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:57,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:57,221 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 13:09:57,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:09:57,222 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:57,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:57,222 INFO L85 PathProgramCache]: Analyzing trace with hash 585407719, now seen corresponding path program 1 times [2024-06-14 13:09:57,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:57,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313479151] [2024-06-14 13:09:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:57,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:59,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:59,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313479151] [2024-06-14 13:09:59,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313479151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:59,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:59,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:09:59,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42364842] [2024-06-14 13:09:59,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:59,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:09:59,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:59,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:09:59,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:09:59,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:09:59,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 221 transitions, 2132 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:59,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:59,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:09:59,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:01,184 INFO L124 PetriNetUnfolderBase]: 2183/3659 cut-off events. [2024-06-14 13:10:01,185 INFO L125 PetriNetUnfolderBase]: For 145855/145857 co-relation queries the response was YES. [2024-06-14 13:10:01,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21567 conditions, 3659 events. 2183/3659 cut-off events. For 145855/145857 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 22140 event pairs, 508 based on Foata normal form. 2/3661 useless extension candidates. Maximal degree in co-relation 21472. Up to 3357 conditions per place. [2024-06-14 13:10:01,220 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 208 selfloop transitions, 40 changer transitions 0/253 dead transitions. [2024-06-14 13:10:01,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 253 transitions, 2876 flow [2024-06-14 13:10:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:10:01,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-14 13:10:01,222 INFO L175 Difference]: Start difference. First operand has 201 places, 221 transitions, 2132 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:10:01,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 253 transitions, 2876 flow [2024-06-14 13:10:01,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 253 transitions, 2829 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:10:01,393 INFO L231 Difference]: Finished difference. Result has 205 places, 227 transitions, 2257 flow [2024-06-14 13:10:01,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2257, PETRI_PLACES=205, PETRI_TRANSITIONS=227} [2024-06-14 13:10:01,394 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-14 13:10:01,394 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 227 transitions, 2257 flow [2024-06-14 13:10:01,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:01,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:01,394 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 13:10:01,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:10:01,395 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:01,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:01,396 INFO L85 PathProgramCache]: Analyzing trace with hash 589126789, now seen corresponding path program 2 times [2024-06-14 13:10:01,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:01,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500193097] [2024-06-14 13:10:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:01,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:03,631 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 13:10:03,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:03,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500193097] [2024-06-14 13:10:03,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500193097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:03,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:03,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:03,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899632385] [2024-06-14 13:10:03,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:03,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:03,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:03,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:03,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:03,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:03,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 227 transitions, 2257 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:03,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:03,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:03,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:04,956 INFO L124 PetriNetUnfolderBase]: 2209/3701 cut-off events. [2024-06-14 13:10:04,956 INFO L125 PetriNetUnfolderBase]: For 155497/155499 co-relation queries the response was YES. [2024-06-14 13:10:04,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22368 conditions, 3701 events. 2209/3701 cut-off events. For 155497/155499 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22478 event pairs, 508 based on Foata normal form. 2/3703 useless extension candidates. Maximal degree in co-relation 22272. Up to 3422 conditions per place. [2024-06-14 13:10:04,992 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 217 selfloop transitions, 34 changer transitions 0/256 dead transitions. [2024-06-14 13:10:04,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 256 transitions, 3011 flow [2024-06-14 13:10:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:04,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:04,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:10:04,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:10:04,994 INFO L175 Difference]: Start difference. First operand has 205 places, 227 transitions, 2257 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:10:04,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 256 transitions, 3011 flow [2024-06-14 13:10:05,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 256 transitions, 2927 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:10:05,251 INFO L231 Difference]: Finished difference. Result has 209 places, 233 transitions, 2345 flow [2024-06-14 13:10:05,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2185, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2345, PETRI_PLACES=209, PETRI_TRANSITIONS=233} [2024-06-14 13:10:05,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-14 13:10:05,252 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 233 transitions, 2345 flow [2024-06-14 13:10:05,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:05,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:05,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:05,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:10:05,253 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:05,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:05,253 INFO L85 PathProgramCache]: Analyzing trace with hash 94198175, now seen corresponding path program 3 times [2024-06-14 13:10:05,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:05,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771495919] [2024-06-14 13:10:05,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:05,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:07,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:07,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771495919] [2024-06-14 13:10:07,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771495919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:07,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:07,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:07,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406998368] [2024-06-14 13:10:07,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:07,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:07,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:07,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:07,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:07,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:07,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 233 transitions, 2345 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:07,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:07,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:07,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:09,143 INFO L124 PetriNetUnfolderBase]: 2203/3695 cut-off events. [2024-06-14 13:10:09,144 INFO L125 PetriNetUnfolderBase]: For 158057/158059 co-relation queries the response was YES. [2024-06-14 13:10:09,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22354 conditions, 3695 events. 2203/3695 cut-off events. For 158057/158059 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 22422 event pairs, 507 based on Foata normal form. 2/3697 useless extension candidates. Maximal degree in co-relation 22256. Up to 3417 conditions per place. [2024-06-14 13:10:09,174 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 217 selfloop transitions, 35 changer transitions 0/257 dead transitions. [2024-06-14 13:10:09,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 257 transitions, 2909 flow [2024-06-14 13:10:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:10:09,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:10:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-14 13:10:09,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36511627906976746 [2024-06-14 13:10:09,176 INFO L175 Difference]: Start difference. First operand has 209 places, 233 transitions, 2345 flow. Second operand 10 states and 157 transitions. [2024-06-14 13:10:09,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 257 transitions, 2909 flow [2024-06-14 13:10:09,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 257 transitions, 2827 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:10:09,436 INFO L231 Difference]: Finished difference. Result has 215 places, 233 transitions, 2339 flow [2024-06-14 13:10:09,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2339, PETRI_PLACES=215, PETRI_TRANSITIONS=233} [2024-06-14 13:10:09,437 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 13:10:09,437 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 233 transitions, 2339 flow [2024-06-14 13:10:09,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:09,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:09,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:09,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:10:09,437 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:09,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:09,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1719613611, now seen corresponding path program 4 times [2024-06-14 13:10:09,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:09,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365232631] [2024-06-14 13:10:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:09,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:11,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:11,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365232631] [2024-06-14 13:10:11,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365232631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:11,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:11,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:11,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155642575] [2024-06-14 13:10:11,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:11,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:11,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:11,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:11,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:11,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:11,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 233 transitions, 2339 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:11,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:11,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:11,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:13,703 INFO L124 PetriNetUnfolderBase]: 2213/3712 cut-off events. [2024-06-14 13:10:13,703 INFO L125 PetriNetUnfolderBase]: For 163714/163718 co-relation queries the response was YES. [2024-06-14 13:10:13,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22573 conditions, 3712 events. 2213/3712 cut-off events. For 163714/163718 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22569 event pairs, 512 based on Foata normal form. 4/3716 useless extension candidates. Maximal degree in co-relation 22473. Up to 3396 conditions per place. [2024-06-14 13:10:13,739 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 208 selfloop transitions, 46 changer transitions 0/259 dead transitions. [2024-06-14 13:10:13,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 259 transitions, 3057 flow [2024-06-14 13:10:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:10:13,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467700258397935 [2024-06-14 13:10:13,741 INFO L175 Difference]: Start difference. First operand has 215 places, 233 transitions, 2339 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:10:13,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 259 transitions, 3057 flow [2024-06-14 13:10:13,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 259 transitions, 2979 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 13:10:13,997 INFO L231 Difference]: Finished difference. Result has 215 places, 236 transitions, 2405 flow [2024-06-14 13:10:13,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2405, PETRI_PLACES=215, PETRI_TRANSITIONS=236} [2024-06-14 13:10:13,998 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 13:10:13,998 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 236 transitions, 2405 flow [2024-06-14 13:10:13,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:13,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:13,998 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 13:10:13,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:10:13,998 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:14,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:14,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1339092021, now seen corresponding path program 5 times [2024-06-14 13:10:14,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:14,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907429178] [2024-06-14 13:10:14,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:14,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:16,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:16,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907429178] [2024-06-14 13:10:16,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907429178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:16,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:16,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:16,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427956250] [2024-06-14 13:10:16,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:16,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:16,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:16,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:16,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:16,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 236 transitions, 2405 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:16,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:16,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:16,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:17,771 INFO L124 PetriNetUnfolderBase]: 2223/3727 cut-off events. [2024-06-14 13:10:17,771 INFO L125 PetriNetUnfolderBase]: For 169390/169392 co-relation queries the response was YES. [2024-06-14 13:10:17,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22828 conditions, 3727 events. 2223/3727 cut-off events. For 169390/169392 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22666 event pairs, 507 based on Foata normal form. 2/3729 useless extension candidates. Maximal degree in co-relation 22727. Up to 3406 conditions per place. [2024-06-14 13:10:17,805 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 211 selfloop transitions, 48 changer transitions 0/264 dead transitions. [2024-06-14 13:10:17,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 264 transitions, 3149 flow [2024-06-14 13:10:17,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:10:17,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:10:17,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:10:17,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-14 13:10:17,807 INFO L175 Difference]: Start difference. First operand has 215 places, 236 transitions, 2405 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:10:17,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 264 transitions, 3149 flow [2024-06-14 13:10:18,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 264 transitions, 2993 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:18,089 INFO L231 Difference]: Finished difference. Result has 215 places, 239 transitions, 2407 flow [2024-06-14 13:10:18,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2407, PETRI_PLACES=215, PETRI_TRANSITIONS=239} [2024-06-14 13:10:18,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 13:10:18,090 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 239 transitions, 2407 flow [2024-06-14 13:10:18,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:18,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:18,090 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 13:10:18,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:10:18,090 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:18,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:18,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1339086441, now seen corresponding path program 6 times [2024-06-14 13:10:18,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:18,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627166037] [2024-06-14 13:10:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:18,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:20,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:20,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627166037] [2024-06-14 13:10:20,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627166037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:20,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:20,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:20,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621823276] [2024-06-14 13:10:20,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:20,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:20,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:20,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:20,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:20,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:20,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 239 transitions, 2407 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:20,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:20,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:20,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:21,764 INFO L124 PetriNetUnfolderBase]: 2217/3719 cut-off events. [2024-06-14 13:10:21,764 INFO L125 PetriNetUnfolderBase]: For 171458/171460 co-relation queries the response was YES. [2024-06-14 13:10:21,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22688 conditions, 3719 events. 2217/3719 cut-off events. For 171458/171460 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22590 event pairs, 507 based on Foata normal form. 2/3721 useless extension candidates. Maximal degree in co-relation 22586. Up to 3401 conditions per place. [2024-06-14 13:10:21,799 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 212 selfloop transitions, 50 changer transitions 0/267 dead transitions. [2024-06-14 13:10:21,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 267 transitions, 3003 flow [2024-06-14 13:10:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:10:21,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 13:10:21,800 INFO L175 Difference]: Start difference. First operand has 215 places, 239 transitions, 2407 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:10:21,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 267 transitions, 3003 flow [2024-06-14 13:10:22,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 267 transitions, 2893 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:22,016 INFO L231 Difference]: Finished difference. Result has 219 places, 239 transitions, 2407 flow [2024-06-14 13:10:22,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2407, PETRI_PLACES=219, PETRI_TRANSITIONS=239} [2024-06-14 13:10:22,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-14 13:10:22,017 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 239 transitions, 2407 flow [2024-06-14 13:10:22,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:22,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:22,017 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] [2024-06-14 13:10:22,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:10:22,017 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:22,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:22,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2107146191, now seen corresponding path program 1 times [2024-06-14 13:10:22,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:22,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84644783] [2024-06-14 13:10:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:22,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:24,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:24,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84644783] [2024-06-14 13:10:24,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84644783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:24,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:24,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:24,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723263945] [2024-06-14 13:10:24,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:24,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:24,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:24,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:24,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:24,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:24,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 239 transitions, 2407 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:24,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:24,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:24,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:26,559 INFO L124 PetriNetUnfolderBase]: 2230/3740 cut-off events. [2024-06-14 13:10:26,559 INFO L125 PetriNetUnfolderBase]: For 171790/171796 co-relation queries the response was YES. [2024-06-14 13:10:26,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22865 conditions, 3740 events. 2230/3740 cut-off events. For 171790/171796 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22762 event pairs, 519 based on Foata normal form. 7/3746 useless extension candidates. Maximal degree in co-relation 22763. Up to 3345 conditions per place. [2024-06-14 13:10:26,601 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 218 selfloop transitions, 57 changer transitions 0/280 dead transitions. [2024-06-14 13:10:26,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 280 transitions, 3427 flow [2024-06-14 13:10:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:26,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:10:26,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 13:10:26,603 INFO L175 Difference]: Start difference. First operand has 219 places, 239 transitions, 2407 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:10:26,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 280 transitions, 3427 flow [2024-06-14 13:10:26,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 280 transitions, 3285 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 13:10:26,949 INFO L231 Difference]: Finished difference. Result has 217 places, 248 transitions, 2551 flow [2024-06-14 13:10:26,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2551, PETRI_PLACES=217, PETRI_TRANSITIONS=248} [2024-06-14 13:10:26,950 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-14 13:10:26,950 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 248 transitions, 2551 flow [2024-06-14 13:10:26,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:26,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:26,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:26,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:10:26,951 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:26,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:26,951 INFO L85 PathProgramCache]: Analyzing trace with hash 682070363, now seen corresponding path program 2 times [2024-06-14 13:10:26,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:26,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45099313] [2024-06-14 13:10:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:26,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:29,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:29,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45099313] [2024-06-14 13:10:29,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45099313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:29,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:29,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:29,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164593353] [2024-06-14 13:10:29,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:29,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:29,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:29,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:29,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:29,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:29,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 248 transitions, 2551 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:29,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:29,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:29,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:31,296 INFO L124 PetriNetUnfolderBase]: 2240/3758 cut-off events. [2024-06-14 13:10:31,296 INFO L125 PetriNetUnfolderBase]: For 173659/173667 co-relation queries the response was YES. [2024-06-14 13:10:31,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23277 conditions, 3758 events. 2240/3758 cut-off events. For 173659/173667 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22869 event pairs, 511 based on Foata normal form. 9/3767 useless extension candidates. Maximal degree in co-relation 23175. Up to 3429 conditions per place. [2024-06-14 13:10:31,330 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 233 selfloop transitions, 42 changer transitions 0/280 dead transitions. [2024-06-14 13:10:31,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 280 transitions, 3266 flow [2024-06-14 13:10:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:31,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:10:31,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 13:10:31,332 INFO L175 Difference]: Start difference. First operand has 217 places, 248 transitions, 2551 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:10:31,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 280 transitions, 3266 flow [2024-06-14 13:10:31,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 280 transitions, 3151 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-14 13:10:31,644 INFO L231 Difference]: Finished difference. Result has 222 places, 254 transitions, 2619 flow [2024-06-14 13:10:31,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2453, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2619, PETRI_PLACES=222, PETRI_TRANSITIONS=254} [2024-06-14 13:10:31,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-14 13:10:31,645 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 254 transitions, 2619 flow [2024-06-14 13:10:31,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:31,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:31,645 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 13:10:31,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:10:31,646 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:31,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:31,646 INFO L85 PathProgramCache]: Analyzing trace with hash -2107026035, now seen corresponding path program 1 times [2024-06-14 13:10:31,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:31,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944742868] [2024-06-14 13:10:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:31,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:34,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:34,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944742868] [2024-06-14 13:10:34,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944742868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:34,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:34,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:34,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104279622] [2024-06-14 13:10:34,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:34,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:34,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:34,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:34,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:34,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:34,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 254 transitions, 2619 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:34,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:34,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:34,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:36,167 INFO L124 PetriNetUnfolderBase]: 2282/3816 cut-off events. [2024-06-14 13:10:36,167 INFO L125 PetriNetUnfolderBase]: For 187947/187955 co-relation queries the response was YES. [2024-06-14 13:10:36,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24045 conditions, 3816 events. 2282/3816 cut-off events. For 187947/187955 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23219 event pairs, 513 based on Foata normal form. 10/3826 useless extension candidates. Maximal degree in co-relation 23941. Up to 3444 conditions per place. [2024-06-14 13:10:36,209 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 243 selfloop transitions, 52 changer transitions 0/300 dead transitions. [2024-06-14 13:10:36,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 300 transitions, 3683 flow [2024-06-14 13:10:36,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:10:36,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:10:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:10:36,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-14 13:10:36,211 INFO L175 Difference]: Start difference. First operand has 222 places, 254 transitions, 2619 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:10:36,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 300 transitions, 3683 flow [2024-06-14 13:10:36,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 300 transitions, 3569 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:36,530 INFO L231 Difference]: Finished difference. Result has 228 places, 267 transitions, 2798 flow [2024-06-14 13:10:36,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2798, PETRI_PLACES=228, PETRI_TRANSITIONS=267} [2024-06-14 13:10:36,531 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-14 13:10:36,531 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 267 transitions, 2798 flow [2024-06-14 13:10:36,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:36,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:36,531 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 13:10:36,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:10:36,532 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:36,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:36,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2102377895, now seen corresponding path program 2 times [2024-06-14 13:10:36,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:36,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715022234] [2024-06-14 13:10:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:36,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:39,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:39,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715022234] [2024-06-14 13:10:39,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715022234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:39,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:39,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:39,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629276064] [2024-06-14 13:10:39,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:39,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:39,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:39,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:39,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:39,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 267 transitions, 2798 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:39,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:39,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:39,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:41,260 INFO L124 PetriNetUnfolderBase]: 2334/3890 cut-off events. [2024-06-14 13:10:41,260 INFO L125 PetriNetUnfolderBase]: For 202284/202292 co-relation queries the response was YES. [2024-06-14 13:10:41,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25186 conditions, 3890 events. 2334/3890 cut-off events. For 202284/202292 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23652 event pairs, 517 based on Foata normal form. 10/3900 useless extension candidates. Maximal degree in co-relation 25080. Up to 3492 conditions per place. [2024-06-14 13:10:41,295 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 242 selfloop transitions, 64 changer transitions 0/311 dead transitions. [2024-06-14 13:10:41,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 311 transitions, 3954 flow [2024-06-14 13:10:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:10:41,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 13:10:41,297 INFO L175 Difference]: Start difference. First operand has 228 places, 267 transitions, 2798 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:10:41,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 311 transitions, 3954 flow [2024-06-14 13:10:41,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 311 transitions, 3760 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:41,665 INFO L231 Difference]: Finished difference. Result has 232 places, 283 transitions, 2976 flow [2024-06-14 13:10:41,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2976, PETRI_PLACES=232, PETRI_TRANSITIONS=283} [2024-06-14 13:10:41,671 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-14 13:10:41,672 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 283 transitions, 2976 flow [2024-06-14 13:10:41,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:41,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:41,672 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 13:10:41,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:10:41,672 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:41,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:41,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1929894515, now seen corresponding path program 3 times [2024-06-14 13:10:41,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:41,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73040708] [2024-06-14 13:10:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:41,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:44,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:44,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73040708] [2024-06-14 13:10:44,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73040708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:44,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:44,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:44,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244183246] [2024-06-14 13:10:44,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:44,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:44,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:44,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:44,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:44,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:44,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 283 transitions, 2976 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:44,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:44,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:44,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:46,431 INFO L124 PetriNetUnfolderBase]: 2328/3882 cut-off events. [2024-06-14 13:10:46,431 INFO L125 PetriNetUnfolderBase]: For 204245/204253 co-relation queries the response was YES. [2024-06-14 13:10:46,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25007 conditions, 3882 events. 2328/3882 cut-off events. For 204245/204253 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23600 event pairs, 516 based on Foata normal form. 10/3892 useless extension candidates. Maximal degree in co-relation 24899. Up to 3487 conditions per place. [2024-06-14 13:10:46,496 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 243 selfloop transitions, 66 changer transitions 0/314 dead transitions. [2024-06-14 13:10:46,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 314 transitions, 3910 flow [2024-06-14 13:10:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:10:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:10:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-14 13:10:46,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37420718816067655 [2024-06-14 13:10:46,498 INFO L175 Difference]: Start difference. First operand has 232 places, 283 transitions, 2976 flow. Second operand 11 states and 177 transitions. [2024-06-14 13:10:46,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 314 transitions, 3910 flow [2024-06-14 13:10:46,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 314 transitions, 3824 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:10:46,978 INFO L231 Difference]: Finished difference. Result has 240 places, 283 transitions, 3028 flow [2024-06-14 13:10:46,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2890, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3028, PETRI_PLACES=240, PETRI_TRANSITIONS=283} [2024-06-14 13:10:46,993 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-14 13:10:46,993 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 283 transitions, 3028 flow [2024-06-14 13:10:46,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:46,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:46,993 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 13:10:46,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:10:46,994 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:46,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:46,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1813985269, now seen corresponding path program 3 times [2024-06-14 13:10:46,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:46,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675643563] [2024-06-14 13:10:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:46,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:50,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:50,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675643563] [2024-06-14 13:10:50,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675643563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:50,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:50,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:50,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794872037] [2024-06-14 13:10:50,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:50,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:50,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:50,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:50,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:50,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:10:50,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 283 transitions, 3028 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:50,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:50,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:10:50,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:51,653 INFO L124 PetriNetUnfolderBase]: 2341/3902 cut-off events. [2024-06-14 13:10:51,653 INFO L125 PetriNetUnfolderBase]: For 211232/211240 co-relation queries the response was YES. [2024-06-14 13:10:51,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25349 conditions, 3902 events. 2341/3902 cut-off events. For 211232/211240 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 23766 event pairs, 518 based on Foata normal form. 9/3911 useless extension candidates. Maximal degree in co-relation 25240. Up to 3560 conditions per place. [2024-06-14 13:10:51,687 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 254 selfloop transitions, 54 changer transitions 0/313 dead transitions. [2024-06-14 13:10:51,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 313 transitions, 3934 flow [2024-06-14 13:10:51,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:10:51,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-14 13:10:51,689 INFO L175 Difference]: Start difference. First operand has 240 places, 283 transitions, 3028 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:10:51,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 313 transitions, 3934 flow [2024-06-14 13:10:52,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 313 transitions, 3776 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 13:10:52,101 INFO L231 Difference]: Finished difference. Result has 242 places, 289 transitions, 3106 flow [2024-06-14 13:10:52,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2870, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3106, PETRI_PLACES=242, PETRI_TRANSITIONS=289} [2024-06-14 13:10:52,102 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-14 13:10:52,102 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 289 transitions, 3106 flow [2024-06-14 13:10:52,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:52,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:52,102 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 13:10:52,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:10:52,103 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:52,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1813739005, now seen corresponding path program 1 times [2024-06-14 13:10:52,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:52,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288031315] [2024-06-14 13:10:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:52,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:56,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:56,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288031315] [2024-06-14 13:10:56,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288031315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:56,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:56,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:56,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038543094] [2024-06-14 13:10:56,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:56,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:56,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:56,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:56,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:56,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:10:56,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 289 transitions, 3106 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:56,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:56,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:10:56,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:57,689 INFO L124 PetriNetUnfolderBase]: 2232/3768 cut-off events. [2024-06-14 13:10:57,689 INFO L125 PetriNetUnfolderBase]: For 237060/237073 co-relation queries the response was YES. [2024-06-14 13:10:57,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24835 conditions, 3768 events. 2232/3768 cut-off events. For 237060/237073 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23318 event pairs, 484 based on Foata normal form. 21/3759 useless extension candidates. Maximal degree in co-relation 24724. Up to 3259 conditions per place. [2024-06-14 13:10:57,722 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 235 selfloop transitions, 46 changer transitions 0/318 dead transitions. [2024-06-14 13:10:57,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 318 transitions, 3780 flow [2024-06-14 13:10:57,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:57,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:57,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:10:57,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-14 13:10:57,725 INFO L175 Difference]: Start difference. First operand has 242 places, 289 transitions, 3106 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:10:57,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 318 transitions, 3780 flow [2024-06-14 13:10:58,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 318 transitions, 3632 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:10:58,138 INFO L231 Difference]: Finished difference. Result has 245 places, 290 transitions, 3074 flow [2024-06-14 13:10:58,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2958, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3074, PETRI_PLACES=245, PETRI_TRANSITIONS=290} [2024-06-14 13:10:58,138 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-14 13:10:58,138 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 290 transitions, 3074 flow [2024-06-14 13:10:58,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:58,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:58,139 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 13:10:58,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:10:58,139 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:58,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:58,139 INFO L85 PathProgramCache]: Analyzing trace with hash 728544737, now seen corresponding path program 4 times [2024-06-14 13:10:58,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:58,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766387908] [2024-06-14 13:10:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:58,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:01,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766387908] [2024-06-14 13:11:01,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766387908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:01,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:01,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:01,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633165941] [2024-06-14 13:11:01,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:01,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:01,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:01,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:01,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:01,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:01,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 290 transitions, 3074 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:01,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:01,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:01,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:02,882 INFO L124 PetriNetUnfolderBase]: 2398/3995 cut-off events. [2024-06-14 13:11:02,882 INFO L125 PetriNetUnfolderBase]: For 227930/227944 co-relation queries the response was YES. [2024-06-14 13:11:02,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26153 conditions, 3995 events. 2398/3995 cut-off events. For 227930/227944 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24360 event pairs, 537 based on Foata normal form. 15/4010 useless extension candidates. Maximal degree in co-relation 26041. Up to 3569 conditions per place. [2024-06-14 13:11:02,922 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 241 selfloop transitions, 80 changer transitions 0/326 dead transitions. [2024-06-14 13:11:02,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 326 transitions, 4286 flow [2024-06-14 13:11:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:02,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:11:02,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 13:11:02,924 INFO L175 Difference]: Start difference. First operand has 245 places, 290 transitions, 3074 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:11:02,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 326 transitions, 4286 flow [2024-06-14 13:11:03,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 326 transitions, 4192 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:03,340 INFO L231 Difference]: Finished difference. Result has 246 places, 296 transitions, 3262 flow [2024-06-14 13:11:03,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3262, PETRI_PLACES=246, PETRI_TRANSITIONS=296} [2024-06-14 13:11:03,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-14 13:11:03,340 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 296 transitions, 3262 flow [2024-06-14 13:11:03,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:03,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:03,341 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 13:11:03,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:11:03,341 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:03,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:03,341 INFO L85 PathProgramCache]: Analyzing trace with hash 728549573, now seen corresponding path program 4 times [2024-06-14 13:11:03,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:03,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408027688] [2024-06-14 13:11:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:03,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:06,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:06,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408027688] [2024-06-14 13:11:06,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408027688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:06,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:06,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:06,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944895628] [2024-06-14 13:11:06,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:06,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:06,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:06,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:06,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:06,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:06,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 296 transitions, 3262 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:06,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:06,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:06,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:07,842 INFO L124 PetriNetUnfolderBase]: 2392/3983 cut-off events. [2024-06-14 13:11:07,842 INFO L125 PetriNetUnfolderBase]: For 232485/232499 co-relation queries the response was YES. [2024-06-14 13:11:07,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26096 conditions, 3983 events. 2392/3983 cut-off events. For 232485/232499 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 24279 event pairs, 532 based on Foata normal form. 16/3999 useless extension candidates. Maximal degree in co-relation 25983. Up to 3633 conditions per place. [2024-06-14 13:11:07,911 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 268 selfloop transitions, 52 changer transitions 0/325 dead transitions. [2024-06-14 13:11:07,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 325 transitions, 4132 flow [2024-06-14 13:11:07,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:07,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:07,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:11:07,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 13:11:07,913 INFO L175 Difference]: Start difference. First operand has 246 places, 296 transitions, 3262 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:11:07,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 325 transitions, 4132 flow [2024-06-14 13:11:08,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 325 transitions, 3875 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 13:11:08,291 INFO L231 Difference]: Finished difference. Result has 251 places, 298 transitions, 3151 flow [2024-06-14 13:11:08,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3151, PETRI_PLACES=251, PETRI_TRANSITIONS=298} [2024-06-14 13:11:08,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-14 13:11:08,292 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 298 transitions, 3151 flow [2024-06-14 13:11:08,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:08,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:08,292 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 13:11:08,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:11:08,293 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:08,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:08,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1501727559, now seen corresponding path program 5 times [2024-06-14 13:11:08,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:08,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651023336] [2024-06-14 13:11:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:08,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:11,273 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 13:11:11,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:11,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651023336] [2024-06-14 13:11:11,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651023336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:11,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:11,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:11,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231557586] [2024-06-14 13:11:11,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:11,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:11,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:11,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:11,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:11,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:11,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 298 transitions, 3151 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:11,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:11,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:11,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:13,101 INFO L124 PetriNetUnfolderBase]: 2397/3990 cut-off events. [2024-06-14 13:11:13,102 INFO L125 PetriNetUnfolderBase]: For 236337/236351 co-relation queries the response was YES. [2024-06-14 13:11:13,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26097 conditions, 3990 events. 2397/3990 cut-off events. For 236337/236351 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24323 event pairs, 532 based on Foata normal form. 15/4005 useless extension candidates. Maximal degree in co-relation 25982. Up to 3567 conditions per place. [2024-06-14 13:11:13,144 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 238 selfloop transitions, 87 changer transitions 0/330 dead transitions. [2024-06-14 13:11:13,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 330 transitions, 4189 flow [2024-06-14 13:11:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:11:13,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-14 13:11:13,145 INFO L175 Difference]: Start difference. First operand has 251 places, 298 transitions, 3151 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:11:13,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 330 transitions, 4189 flow [2024-06-14 13:11:13,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 330 transitions, 4091 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:11:13,505 INFO L231 Difference]: Finished difference. Result has 254 places, 301 transitions, 3283 flow [2024-06-14 13:11:13,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3053, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3283, PETRI_PLACES=254, PETRI_TRANSITIONS=301} [2024-06-14 13:11:13,506 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-14 13:11:13,506 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 301 transitions, 3283 flow [2024-06-14 13:11:13,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:13,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:13,506 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 13:11:13,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:11:13,506 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:13,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:13,507 INFO L85 PathProgramCache]: Analyzing trace with hash 728549387, now seen corresponding path program 6 times [2024-06-14 13:11:13,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:13,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136242910] [2024-06-14 13:11:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:13,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:16,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:16,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136242910] [2024-06-14 13:11:16,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136242910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:16,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:16,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:16,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029485177] [2024-06-14 13:11:16,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:16,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:16,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:16,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:16,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:16,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:16,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 301 transitions, 3283 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:16,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:16,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:16,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:18,162 INFO L124 PetriNetUnfolderBase]: 2394/3986 cut-off events. [2024-06-14 13:11:18,162 INFO L125 PetriNetUnfolderBase]: For 241409/241423 co-relation queries the response was YES. [2024-06-14 13:11:18,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26217 conditions, 3986 events. 2394/3986 cut-off events. For 241409/241423 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24299 event pairs, 532 based on Foata normal form. 15/4001 useless extension candidates. Maximal degree in co-relation 26101. Up to 3648 conditions per place. [2024-06-14 13:11:18,207 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 270 selfloop transitions, 49 changer transitions 0/324 dead transitions. [2024-06-14 13:11:18,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 324 transitions, 3991 flow [2024-06-14 13:11:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:11:18,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 13:11:18,208 INFO L175 Difference]: Start difference. First operand has 254 places, 301 transitions, 3283 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:11:18,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 324 transitions, 3991 flow [2024-06-14 13:11:18,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 324 transitions, 3738 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:18,627 INFO L231 Difference]: Finished difference. Result has 256 places, 301 transitions, 3134 flow [2024-06-14 13:11:18,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3134, PETRI_PLACES=256, PETRI_TRANSITIONS=301} [2024-06-14 13:11:18,629 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-14 13:11:18,629 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 301 transitions, 3134 flow [2024-06-14 13:11:18,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:18,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:18,630 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 13:11:18,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:11:18,630 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:18,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:18,630 INFO L85 PathProgramCache]: Analyzing trace with hash 967758407, now seen corresponding path program 7 times [2024-06-14 13:11:18,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:18,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058283830] [2024-06-14 13:11:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:18,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:21,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058283830] [2024-06-14 13:11:21,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058283830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:21,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:21,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:21,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548875351] [2024-06-14 13:11:21,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:21,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:21,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:21,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:21,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 301 transitions, 3134 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:21,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:21,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:21,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:23,193 INFO L124 PetriNetUnfolderBase]: 2399/3993 cut-off events. [2024-06-14 13:11:23,194 INFO L125 PetriNetUnfolderBase]: For 247886/247900 co-relation queries the response was YES. [2024-06-14 13:11:23,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26190 conditions, 3993 events. 2399/3993 cut-off events. For 247886/247900 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24316 event pairs, 532 based on Foata normal form. 15/4008 useless extension candidates. Maximal degree in co-relation 26073. Up to 3570 conditions per place. [2024-06-14 13:11:23,249 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 233 selfloop transitions, 90 changer transitions 0/328 dead transitions. [2024-06-14 13:11:23,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 328 transitions, 4026 flow [2024-06-14 13:11:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:11:23,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:11:23,251 INFO L175 Difference]: Start difference. First operand has 256 places, 301 transitions, 3134 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:11:23,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 328 transitions, 4026 flow [2024-06-14 13:11:23,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 328 transitions, 3924 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:23,726 INFO L231 Difference]: Finished difference. Result has 257 places, 304 transitions, 3262 flow [2024-06-14 13:11:23,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3262, PETRI_PLACES=257, PETRI_TRANSITIONS=304} [2024-06-14 13:11:23,727 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-14 13:11:23,727 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 304 transitions, 3262 flow [2024-06-14 13:11:23,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:23,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:23,727 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 13:11:23,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:11:23,727 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:23,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1083228323, now seen corresponding path program 5 times [2024-06-14 13:11:23,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:23,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582028038] [2024-06-14 13:11:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:23,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:26,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:26,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582028038] [2024-06-14 13:11:26,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582028038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:26,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:26,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:26,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85494088] [2024-06-14 13:11:26,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:26,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:26,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:26,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:26,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:26,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:26,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 304 transitions, 3262 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:26,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:26,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:26,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:28,090 INFO L124 PetriNetUnfolderBase]: 2430/4038 cut-off events. [2024-06-14 13:11:28,090 INFO L125 PetriNetUnfolderBase]: For 262097/262111 co-relation queries the response was YES. [2024-06-14 13:11:28,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26861 conditions, 4038 events. 2430/4038 cut-off events. For 262097/262111 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 24565 event pairs, 522 based on Foata normal form. 16/4054 useless extension candidates. Maximal degree in co-relation 26743. Up to 3568 conditions per place. [2024-06-14 13:11:28,133 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 254 selfloop transitions, 85 changer transitions 0/344 dead transitions. [2024-06-14 13:11:28,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 344 transitions, 4490 flow [2024-06-14 13:11:28,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:11:28,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-14 13:11:28,134 INFO L175 Difference]: Start difference. First operand has 257 places, 304 transitions, 3262 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:11:28,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 344 transitions, 4490 flow [2024-06-14 13:11:28,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 344 transitions, 4320 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:11:28,589 INFO L231 Difference]: Finished difference. Result has 262 places, 319 transitions, 3534 flow [2024-06-14 13:11:28,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3534, PETRI_PLACES=262, PETRI_TRANSITIONS=319} [2024-06-14 13:11:28,589 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-14 13:11:28,589 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 319 transitions, 3534 flow [2024-06-14 13:11:28,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:28,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:28,590 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 13:11:28,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:11:28,590 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:28,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:28,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1082812613, now seen corresponding path program 6 times [2024-06-14 13:11:28,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:28,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750565308] [2024-06-14 13:11:28,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:28,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:31,525 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 13:11:31,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:31,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750565308] [2024-06-14 13:11:31,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750565308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:31,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:31,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:31,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252815029] [2024-06-14 13:11:31,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:31,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:31,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:31,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:31,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:31,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:31,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 319 transitions, 3534 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:31,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:31,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:31,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:33,150 INFO L124 PetriNetUnfolderBase]: 2424/4032 cut-off events. [2024-06-14 13:11:33,151 INFO L125 PetriNetUnfolderBase]: For 266446/266460 co-relation queries the response was YES. [2024-06-14 13:11:33,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27110 conditions, 4032 events. 2424/4032 cut-off events. For 266446/266460 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24599 event pairs, 530 based on Foata normal form. 16/4048 useless extension candidates. Maximal degree in co-relation 26989. Up to 3686 conditions per place. [2024-06-14 13:11:33,196 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 282 selfloop transitions, 52 changer transitions 0/339 dead transitions. [2024-06-14 13:11:33,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 339 transitions, 4262 flow [2024-06-14 13:11:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:11:33,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 13:11:33,198 INFO L175 Difference]: Start difference. First operand has 262 places, 319 transitions, 3534 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:11:33,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 339 transitions, 4262 flow [2024-06-14 13:11:33,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 339 transitions, 4152 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-14 13:11:33,841 INFO L231 Difference]: Finished difference. Result has 268 places, 319 transitions, 3534 flow [2024-06-14 13:11:33,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3424, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3534, PETRI_PLACES=268, PETRI_TRANSITIONS=319} [2024-06-14 13:11:33,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-14 13:11:33,842 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 319 transitions, 3534 flow [2024-06-14 13:11:33,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:33,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:33,842 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 13:11:33,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:11:33,842 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:33,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:33,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1082812427, now seen corresponding path program 8 times [2024-06-14 13:11:33,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:33,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085305752] [2024-06-14 13:11:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:33,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:36,534 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 13:11:36,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:36,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085305752] [2024-06-14 13:11:36,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085305752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:36,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:36,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:36,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132052819] [2024-06-14 13:11:36,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:36,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:36,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:36,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:36,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:36,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:36,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 319 transitions, 3534 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:36,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:36,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:36,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:38,437 INFO L124 PetriNetUnfolderBase]: 2437/4048 cut-off events. [2024-06-14 13:11:38,437 INFO L125 PetriNetUnfolderBase]: For 272683/272697 co-relation queries the response was YES. [2024-06-14 13:11:38,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27222 conditions, 4048 events. 2437/4048 cut-off events. For 272683/272697 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24647 event pairs, 528 based on Foata normal form. 15/4063 useless extension candidates. Maximal degree in co-relation 27099. Up to 3694 conditions per place. [2024-06-14 13:11:38,481 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 278 selfloop transitions, 64 changer transitions 0/347 dead transitions. [2024-06-14 13:11:38,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 347 transitions, 4518 flow [2024-06-14 13:11:38,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:11:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:11:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-14 13:11:38,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-14 13:11:38,483 INFO L175 Difference]: Start difference. First operand has 268 places, 319 transitions, 3534 flow. Second operand 10 states and 155 transitions. [2024-06-14 13:11:38,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 347 transitions, 4518 flow [2024-06-14 13:11:38,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 347 transitions, 4402 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:39,001 INFO L231 Difference]: Finished difference. Result has 272 places, 325 transitions, 3668 flow [2024-06-14 13:11:39,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3418, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3668, PETRI_PLACES=272, PETRI_TRANSITIONS=325} [2024-06-14 13:11:39,002 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-14 13:11:39,002 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 325 transitions, 3668 flow [2024-06-14 13:11:39,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:39,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:39,002 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 13:11:39,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:11:39,002 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:39,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1083049577, now seen corresponding path program 9 times [2024-06-14 13:11:39,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:39,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196743135] [2024-06-14 13:11:39,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:39,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:41,599 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 13:11:41,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:41,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196743135] [2024-06-14 13:11:41,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196743135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:41,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:41,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:41,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207058013] [2024-06-14 13:11:41,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:41,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:41,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:41,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:41,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:41,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:41,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 325 transitions, 3668 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:41,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:41,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:41,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:43,091 INFO L124 PetriNetUnfolderBase]: 2434/4048 cut-off events. [2024-06-14 13:11:43,092 INFO L125 PetriNetUnfolderBase]: For 277712/277726 co-relation queries the response was YES. [2024-06-14 13:11:43,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27282 conditions, 4048 events. 2434/4048 cut-off events. For 277712/277726 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24723 event pairs, 532 based on Foata normal form. 15/4063 useless extension candidates. Maximal degree in co-relation 27158. Up to 3691 conditions per place. [2024-06-14 13:11:43,138 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 276 selfloop transitions, 63 changer transitions 0/344 dead transitions. [2024-06-14 13:11:43,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 344 transitions, 4404 flow [2024-06-14 13:11:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:11:43,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 13:11:43,140 INFO L175 Difference]: Start difference. First operand has 272 places, 325 transitions, 3668 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:11:43,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 344 transitions, 4404 flow [2024-06-14 13:11:43,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 344 transitions, 4214 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:43,666 INFO L231 Difference]: Finished difference. Result has 273 places, 325 transitions, 3610 flow [2024-06-14 13:11:43,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3610, PETRI_PLACES=273, PETRI_TRANSITIONS=325} [2024-06-14 13:11:43,666 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-14 13:11:43,667 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 325 transitions, 3610 flow [2024-06-14 13:11:43,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:43,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:43,667 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 13:11:43,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:11:43,667 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:43,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:43,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1996321471, now seen corresponding path program 7 times [2024-06-14 13:11:43,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:43,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103864042] [2024-06-14 13:11:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:43,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:46,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:46,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103864042] [2024-06-14 13:11:46,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103864042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:46,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:46,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:46,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357524205] [2024-06-14 13:11:46,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:46,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:46,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:46,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:46,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:46,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:46,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 325 transitions, 3610 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:46,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:46,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:46,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:48,117 INFO L124 PetriNetUnfolderBase]: 2460/4084 cut-off events. [2024-06-14 13:11:48,117 INFO L125 PetriNetUnfolderBase]: For 292752/292766 co-relation queries the response was YES. [2024-06-14 13:11:48,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27709 conditions, 4084 events. 2460/4084 cut-off events. For 292752/292766 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 24887 event pairs, 519 based on Foata normal form. 16/4100 useless extension candidates. Maximal degree in co-relation 27584. Up to 3602 conditions per place. [2024-06-14 13:11:48,165 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 257 selfloop transitions, 93 changer transitions 0/355 dead transitions. [2024-06-14 13:11:48,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 355 transitions, 4753 flow [2024-06-14 13:11:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:11:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:11:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:11:48,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 13:11:48,167 INFO L175 Difference]: Start difference. First operand has 273 places, 325 transitions, 3610 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:11:48,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 355 transitions, 4753 flow [2024-06-14 13:11:48,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 355 transitions, 4627 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:11:48,920 INFO L231 Difference]: Finished difference. Result has 273 places, 331 transitions, 3775 flow [2024-06-14 13:11:48,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3775, PETRI_PLACES=273, PETRI_TRANSITIONS=331} [2024-06-14 13:11:48,921 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-14 13:11:48,921 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 331 transitions, 3775 flow [2024-06-14 13:11:48,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:48,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:48,921 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 13:11:48,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:11:48,921 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:48,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:48,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1768420321, now seen corresponding path program 8 times [2024-06-14 13:11:48,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:48,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179321960] [2024-06-14 13:11:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:48,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:51,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:51,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179321960] [2024-06-14 13:11:51,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179321960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:51,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:51,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:51,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760825505] [2024-06-14 13:11:51,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:51,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:51,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:51,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:51,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:51,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:51,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 331 transitions, 3775 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:51,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:51,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:51,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:53,217 INFO L124 PetriNetUnfolderBase]: 2470/4101 cut-off events. [2024-06-14 13:11:53,217 INFO L125 PetriNetUnfolderBase]: For 302596/302624 co-relation queries the response was YES. [2024-06-14 13:11:53,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28113 conditions, 4101 events. 2470/4101 cut-off events. For 302596/302624 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25063 event pairs, 538 based on Foata normal form. 24/4125 useless extension candidates. Maximal degree in co-relation 27987. Up to 3612 conditions per place. [2024-06-14 13:11:53,263 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 256 selfloop transitions, 92 changer transitions 0/353 dead transitions. [2024-06-14 13:11:53,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 353 transitions, 4869 flow [2024-06-14 13:11:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:11:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:11:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:11:53,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:11:53,265 INFO L175 Difference]: Start difference. First operand has 273 places, 331 transitions, 3775 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:11:53,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 353 transitions, 4869 flow [2024-06-14 13:11:53,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 353 transitions, 4717 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 13:11:53,853 INFO L231 Difference]: Finished difference. Result has 276 places, 334 transitions, 3877 flow [2024-06-14 13:11:53,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3630, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3877, PETRI_PLACES=276, PETRI_TRANSITIONS=334} [2024-06-14 13:11:53,853 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 13:11:53,853 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 334 transitions, 3877 flow [2024-06-14 13:11:53,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:53,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:53,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:53,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:11:53,854 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:53,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:53,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1996500217, now seen corresponding path program 10 times [2024-06-14 13:11:53,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:53,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996031090] [2024-06-14 13:11:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:53,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:56,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:56,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996031090] [2024-06-14 13:11:56,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996031090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:56,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:56,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:56,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50595401] [2024-06-14 13:11:56,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:56,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:56,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:56,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:11:56,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 334 transitions, 3877 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:56,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:56,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:11:56,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:57,775 INFO L124 PetriNetUnfolderBase]: 2467/4090 cut-off events. [2024-06-14 13:11:57,775 INFO L125 PetriNetUnfolderBase]: For 296447/296461 co-relation queries the response was YES. [2024-06-14 13:11:57,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27975 conditions, 4090 events. 2467/4090 cut-off events. For 296447/296461 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24941 event pairs, 535 based on Foata normal form. 15/4105 useless extension candidates. Maximal degree in co-relation 27849. Up to 3676 conditions per place. [2024-06-14 13:11:57,824 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 269 selfloop transitions, 87 changer transitions 0/361 dead transitions. [2024-06-14 13:11:57,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 361 transitions, 4813 flow [2024-06-14 13:11:57,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:11:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:11:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:11:57,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 13:11:57,826 INFO L175 Difference]: Start difference. First operand has 276 places, 334 transitions, 3877 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:11:57,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 361 transitions, 4813 flow [2024-06-14 13:11:58,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 361 transitions, 4564 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 13:11:58,514 INFO L231 Difference]: Finished difference. Result has 279 places, 334 transitions, 3816 flow [2024-06-14 13:11:58,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3816, PETRI_PLACES=279, PETRI_TRANSITIONS=334} [2024-06-14 13:11:58,515 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-14 13:11:58,515 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 334 transitions, 3816 flow [2024-06-14 13:11:58,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:58,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:58,516 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 13:11:58,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:11:58,516 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:58,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:58,516 INFO L85 PathProgramCache]: Analyzing trace with hash -426846537, now seen corresponding path program 9 times [2024-06-14 13:11:58,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:58,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505678385] [2024-06-14 13:11:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:58,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:01,502 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 13:12:01,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:01,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505678385] [2024-06-14 13:12:01,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505678385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:01,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:01,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:01,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272477202] [2024-06-14 13:12:01,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:01,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:01,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:01,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:01,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:01,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:01,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 334 transitions, 3816 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:01,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:01,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:01,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:03,085 INFO L124 PetriNetUnfolderBase]: 2461/4086 cut-off events. [2024-06-14 13:12:03,085 INFO L125 PetriNetUnfolderBase]: For 301000/301014 co-relation queries the response was YES. [2024-06-14 13:12:03,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27732 conditions, 4086 events. 2461/4086 cut-off events. For 301000/301014 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24953 event pairs, 536 based on Foata normal form. 16/4102 useless extension candidates. Maximal degree in co-relation 27605. Up to 3726 conditions per place. [2024-06-14 13:12:03,127 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 295 selfloop transitions, 57 changer transitions 0/357 dead transitions. [2024-06-14 13:12:03,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 357 transitions, 4590 flow [2024-06-14 13:12:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:03,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:12:03,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:12:03,128 INFO L175 Difference]: Start difference. First operand has 279 places, 334 transitions, 3816 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:12:03,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 357 transitions, 4590 flow [2024-06-14 13:12:03,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 357 transitions, 4330 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 13:12:03,574 INFO L231 Difference]: Finished difference. Result has 277 places, 334 transitions, 3684 flow [2024-06-14 13:12:03,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3556, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3684, PETRI_PLACES=277, PETRI_TRANSITIONS=334} [2024-06-14 13:12:03,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-14 13:12:03,574 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 334 transitions, 3684 flow [2024-06-14 13:12:03,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:03,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:03,575 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 13:12:03,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:12:03,575 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:03,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:03,575 INFO L85 PathProgramCache]: Analyzing trace with hash -426846723, now seen corresponding path program 11 times [2024-06-14 13:12:03,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:03,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443463213] [2024-06-14 13:12:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:03,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:06,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:06,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443463213] [2024-06-14 13:12:06,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443463213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:06,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:06,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:06,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331730343] [2024-06-14 13:12:06,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:06,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:06,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:06,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:06,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:06,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:06,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 334 transitions, 3684 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:06,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:06,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:06,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:08,034 INFO L124 PetriNetUnfolderBase]: 2458/4082 cut-off events. [2024-06-14 13:12:08,034 INFO L125 PetriNetUnfolderBase]: For 287635/287649 co-relation queries the response was YES. [2024-06-14 13:12:08,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27376 conditions, 4082 events. 2458/4082 cut-off events. For 287635/287649 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24925 event pairs, 536 based on Foata normal form. 15/4097 useless extension candidates. Maximal degree in co-relation 27250. Up to 3665 conditions per place. [2024-06-14 13:12:08,106 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 276 selfloop transitions, 90 changer transitions 0/371 dead transitions. [2024-06-14 13:12:08,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 371 transitions, 4668 flow [2024-06-14 13:12:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:12:08,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:12:08,113 INFO L175 Difference]: Start difference. First operand has 277 places, 334 transitions, 3684 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:12:08,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 371 transitions, 4668 flow [2024-06-14 13:12:08,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 371 transitions, 4512 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:12:08,724 INFO L231 Difference]: Finished difference. Result has 278 places, 334 transitions, 3730 flow [2024-06-14 13:12:08,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3730, PETRI_PLACES=278, PETRI_TRANSITIONS=334} [2024-06-14 13:12:08,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-14 13:12:08,724 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 334 transitions, 3730 flow [2024-06-14 13:12:08,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:08,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:08,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:08,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:12:08,725 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:08,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:08,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1990272751, now seen corresponding path program 10 times [2024-06-14 13:12:08,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:08,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953288142] [2024-06-14 13:12:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:08,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:11,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:11,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953288142] [2024-06-14 13:12:11,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953288142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:11,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:11,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:11,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580467928] [2024-06-14 13:12:11,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:11,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:11,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:11,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:11,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:11,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:11,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 334 transitions, 3730 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:11,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:11,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:11,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:13,413 INFO L124 PetriNetUnfolderBase]: 2452/4075 cut-off events. [2024-06-14 13:12:13,413 INFO L125 PetriNetUnfolderBase]: For 279023/279051 co-relation queries the response was YES. [2024-06-14 13:12:13,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27157 conditions, 4075 events. 2452/4075 cut-off events. For 279023/279051 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24906 event pairs, 538 based on Foata normal form. 24/4099 useless extension candidates. Maximal degree in co-relation 27032. Up to 3594 conditions per place. [2024-06-14 13:12:13,466 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 255 selfloop transitions, 92 changer transitions 0/352 dead transitions. [2024-06-14 13:12:13,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 352 transitions, 4616 flow [2024-06-14 13:12:13,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:12:13,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-14 13:12:13,468 INFO L175 Difference]: Start difference. First operand has 278 places, 334 transitions, 3730 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:12:13,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 352 transitions, 4616 flow [2024-06-14 13:12:14,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 352 transitions, 4416 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 13:12:14,083 INFO L231 Difference]: Finished difference. Result has 275 places, 334 transitions, 3726 flow [2024-06-14 13:12:14,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3726, PETRI_PLACES=275, PETRI_TRANSITIONS=334} [2024-06-14 13:12:14,083 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-14 13:12:14,083 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 334 transitions, 3726 flow [2024-06-14 13:12:14,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:14,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:14,084 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 13:12:14,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:12:14,084 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:14,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:14,085 INFO L85 PathProgramCache]: Analyzing trace with hash 402160243, now seen corresponding path program 11 times [2024-06-14 13:12:14,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:14,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987399276] [2024-06-14 13:12:14,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:14,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:17,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:17,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987399276] [2024-06-14 13:12:17,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987399276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:17,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:17,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:17,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362073427] [2024-06-14 13:12:17,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:17,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:17,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:17,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:17,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:17,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 334 transitions, 3726 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:17,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:17,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:17,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:18,714 INFO L124 PetriNetUnfolderBase]: 2446/4063 cut-off events. [2024-06-14 13:12:18,714 INFO L125 PetriNetUnfolderBase]: For 258882/258890 co-relation queries the response was YES. [2024-06-14 13:12:18,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26782 conditions, 4063 events. 2446/4063 cut-off events. For 258882/258890 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24830 event pairs, 525 based on Foata normal form. 10/4073 useless extension candidates. Maximal degree in co-relation 26658. Up to 3655 conditions per place. [2024-06-14 13:12:18,763 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 282 selfloop transitions, 78 changer transitions 0/365 dead transitions. [2024-06-14 13:12:18,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 365 transitions, 4670 flow [2024-06-14 13:12:18,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:18,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:12:18,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 13:12:18,766 INFO L175 Difference]: Start difference. First operand has 275 places, 334 transitions, 3726 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:12:18,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 365 transitions, 4670 flow [2024-06-14 13:12:19,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 365 transitions, 4396 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:19,298 INFO L231 Difference]: Finished difference. Result has 279 places, 334 transitions, 3622 flow [2024-06-14 13:12:19,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3452, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3622, PETRI_PLACES=279, PETRI_TRANSITIONS=334} [2024-06-14 13:12:19,299 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 235 predicate places. [2024-06-14 13:12:19,299 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 334 transitions, 3622 flow [2024-06-14 13:12:19,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:19,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:19,300 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 13:12:19,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:12:19,300 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:19,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:19,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2121335745, now seen corresponding path program 12 times [2024-06-14 13:12:19,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:19,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151114607] [2024-06-14 13:12:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:19,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:22,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:22,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151114607] [2024-06-14 13:12:22,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151114607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:22,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:22,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:22,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752405982] [2024-06-14 13:12:22,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:22,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:22,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:22,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:22,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:22,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:22,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 334 transitions, 3622 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:22,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:22,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:22,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:23,427 INFO L124 PetriNetUnfolderBase]: 2440/4055 cut-off events. [2024-06-14 13:12:23,427 INFO L125 PetriNetUnfolderBase]: For 260521/260529 co-relation queries the response was YES. [2024-06-14 13:12:23,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26435 conditions, 4055 events. 2440/4055 cut-off events. For 260521/260529 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24742 event pairs, 525 based on Foata normal form. 10/4065 useless extension candidates. Maximal degree in co-relation 26311. Up to 3650 conditions per place. [2024-06-14 13:12:23,475 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 279 selfloop transitions, 73 changer transitions 0/357 dead transitions. [2024-06-14 13:12:23,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 357 transitions, 4394 flow [2024-06-14 13:12:23,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:12:23,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 13:12:23,476 INFO L175 Difference]: Start difference. First operand has 279 places, 334 transitions, 3622 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:12:23,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 357 transitions, 4394 flow [2024-06-14 13:12:24,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 357 transitions, 4178 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-14 13:12:24,152 INFO L231 Difference]: Finished difference. Result has 276 places, 334 transitions, 3562 flow [2024-06-14 13:12:24,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3562, PETRI_PLACES=276, PETRI_TRANSITIONS=334} [2024-06-14 13:12:24,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 13:12:24,152 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 334 transitions, 3562 flow [2024-06-14 13:12:24,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:24,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:24,153 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 13:12:24,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:12:24,153 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:24,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:24,153 INFO L85 PathProgramCache]: Analyzing trace with hash 402160057, now seen corresponding path program 12 times [2024-06-14 13:12:24,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:24,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395942585] [2024-06-14 13:12:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:24,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:27,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:27,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395942585] [2024-06-14 13:12:27,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395942585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:27,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:27,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:27,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529091501] [2024-06-14 13:12:27,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:27,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:27,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:27,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:27,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:27,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:27,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 334 transitions, 3562 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:27,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:27,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:27,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:28,967 INFO L124 PetriNetUnfolderBase]: 2437/4049 cut-off events. [2024-06-14 13:12:28,968 INFO L125 PetriNetUnfolderBase]: For 248880/248888 co-relation queries the response was YES. [2024-06-14 13:12:28,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26159 conditions, 4049 events. 2437/4049 cut-off events. For 248880/248888 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24692 event pairs, 529 based on Foata normal form. 9/4058 useless extension candidates. Maximal degree in co-relation 26036. Up to 3638 conditions per place. [2024-06-14 13:12:29,013 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 278 selfloop transitions, 90 changer transitions 0/373 dead transitions. [2024-06-14 13:12:29,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 373 transitions, 4414 flow [2024-06-14 13:12:29,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:12:29,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-14 13:12:29,015 INFO L175 Difference]: Start difference. First operand has 276 places, 334 transitions, 3562 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:12:29,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 373 transitions, 4414 flow [2024-06-14 13:12:29,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 373 transitions, 4236 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:12:29,503 INFO L231 Difference]: Finished difference. Result has 278 places, 334 transitions, 3582 flow [2024-06-14 13:12:29,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3582, PETRI_PLACES=278, PETRI_TRANSITIONS=334} [2024-06-14 13:12:29,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-14 13:12:29,504 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 334 transitions, 3582 flow [2024-06-14 13:12:29,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:29,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:29,505 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 13:12:29,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:12:29,505 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:29,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1773721693, now seen corresponding path program 2 times [2024-06-14 13:12:29,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:29,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94520231] [2024-06-14 13:12:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:29,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:33,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:33,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94520231] [2024-06-14 13:12:33,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94520231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:33,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:33,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:33,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338312132] [2024-06-14 13:12:33,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:33,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:33,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:33,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:33,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:33,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:12:33,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 334 transitions, 3582 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:33,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:33,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:12:33,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:35,315 INFO L124 PetriNetUnfolderBase]: 2332/3907 cut-off events. [2024-06-14 13:12:35,315 INFO L125 PetriNetUnfolderBase]: For 274016/274039 co-relation queries the response was YES. [2024-06-14 13:12:35,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25562 conditions, 3907 events. 2332/3907 cut-off events. For 274016/274039 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 24183 event pairs, 493 based on Foata normal form. 34/3910 useless extension candidates. Maximal degree in co-relation 25439. Up to 3367 conditions per place. [2024-06-14 13:12:35,380 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 251 selfloop transitions, 50 changer transitions 0/354 dead transitions. [2024-06-14 13:12:35,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 354 transitions, 4274 flow [2024-06-14 13:12:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:35,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:12:35,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-14 13:12:35,382 INFO L175 Difference]: Start difference. First operand has 278 places, 334 transitions, 3582 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:12:35,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 354 transitions, 4274 flow [2024-06-14 13:12:36,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 354 transitions, 4084 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 13:12:36,278 INFO L231 Difference]: Finished difference. Result has 276 places, 335 transitions, 3518 flow [2024-06-14 13:12:36,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3518, PETRI_PLACES=276, PETRI_TRANSITIONS=335} [2024-06-14 13:12:36,278 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-14 13:12:36,279 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 335 transitions, 3518 flow [2024-06-14 13:12:36,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:36,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:36,279 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 13:12:36,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:12:36,279 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:36,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:36,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2121344673, now seen corresponding path program 3 times [2024-06-14 13:12:36,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:36,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844496480] [2024-06-14 13:12:36,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:36,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:40,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:40,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844496480] [2024-06-14 13:12:40,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844496480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:40,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:40,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:40,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996339200] [2024-06-14 13:12:40,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:40,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:40,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:40,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:40,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:40,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:12:40,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 335 transitions, 3518 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:40,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:40,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:12:40,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:41,732 INFO L124 PetriNetUnfolderBase]: 2365/3980 cut-off events. [2024-06-14 13:12:41,732 INFO L125 PetriNetUnfolderBase]: For 260586/260597 co-relation queries the response was YES. [2024-06-14 13:12:41,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25801 conditions, 3980 events. 2365/3980 cut-off events. For 260586/260597 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24783 event pairs, 505 based on Foata normal form. 21/3975 useless extension candidates. Maximal degree in co-relation 25678. Up to 3389 conditions per place. [2024-06-14 13:12:41,776 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 263 selfloop transitions, 45 changer transitions 0/361 dead transitions. [2024-06-14 13:12:41,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 361 transitions, 4244 flow [2024-06-14 13:12:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:12:41,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-14 13:12:41,778 INFO L175 Difference]: Start difference. First operand has 276 places, 335 transitions, 3518 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:12:41,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 361 transitions, 4244 flow [2024-06-14 13:12:42,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 361 transitions, 4140 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:42,204 INFO L231 Difference]: Finished difference. Result has 278 places, 336 transitions, 3536 flow [2024-06-14 13:12:42,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3536, PETRI_PLACES=278, PETRI_TRANSITIONS=336} [2024-06-14 13:12:42,205 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-14 13:12:42,205 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 336 transitions, 3536 flow [2024-06-14 13:12:42,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:42,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:42,205 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 13:12:42,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:12:42,205 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:42,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:42,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1759840513, now seen corresponding path program 4 times [2024-06-14 13:12:42,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:42,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600718983] [2024-06-14 13:12:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:42,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:46,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:46,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600718983] [2024-06-14 13:12:46,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600718983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:46,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:46,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:46,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763282460] [2024-06-14 13:12:46,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:46,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:46,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:46,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:46,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:46,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-14 13:12:46,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 336 transitions, 3536 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:46,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:46,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-14 13:12:46,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:47,388 INFO L124 PetriNetUnfolderBase]: 2370/3977 cut-off events. [2024-06-14 13:12:47,389 INFO L125 PetriNetUnfolderBase]: For 249953/249976 co-relation queries the response was YES. [2024-06-14 13:12:47,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25589 conditions, 3977 events. 2370/3977 cut-off events. For 249953/249976 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 24672 event pairs, 497 based on Foata normal form. 30/3976 useless extension candidates. Maximal degree in co-relation 25465. Up to 3305 conditions per place. [2024-06-14 13:12:47,429 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 251 selfloop transitions, 54 changer transitions 0/358 dead transitions. [2024-06-14 13:12:47,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 358 transitions, 4258 flow [2024-06-14 13:12:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:12:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:12:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:12:47,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-14 13:12:47,431 INFO L175 Difference]: Start difference. First operand has 278 places, 336 transitions, 3536 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:12:47,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 358 transitions, 4258 flow [2024-06-14 13:12:47,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 358 transitions, 4162 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:47,922 INFO L231 Difference]: Finished difference. Result has 280 places, 337 transitions, 3576 flow [2024-06-14 13:12:47,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3442, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3576, PETRI_PLACES=280, PETRI_TRANSITIONS=337} [2024-06-14 13:12:47,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-14 13:12:47,922 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 337 transitions, 3576 flow [2024-06-14 13:12:47,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:47,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:47,923 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 13:12:47,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:12:47,923 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:47,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:47,923 INFO L85 PathProgramCache]: Analyzing trace with hash -371069497, now seen corresponding path program 1 times [2024-06-14 13:12:47,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:47,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204430867] [2024-06-14 13:12:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:47,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:50,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:50,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204430867] [2024-06-14 13:12:50,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204430867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:50,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:50,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:50,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408598008] [2024-06-14 13:12:50,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:50,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:50,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:50,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:50,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 337 transitions, 3576 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:50,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:50,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:50,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:52,303 INFO L124 PetriNetUnfolderBase]: 2535/4198 cut-off events. [2024-06-14 13:12:52,303 INFO L125 PetriNetUnfolderBase]: For 238335/238337 co-relation queries the response was YES. [2024-06-14 13:12:52,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26749 conditions, 4198 events. 2535/4198 cut-off events. For 238335/238337 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 25691 event pairs, 516 based on Foata normal form. 2/4200 useless extension candidates. Maximal degree in co-relation 26624. Up to 3886 conditions per place. [2024-06-14 13:12:52,347 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 332 selfloop transitions, 32 changer transitions 0/369 dead transitions. [2024-06-14 13:12:52,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 369 transitions, 4606 flow [2024-06-14 13:12:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:12:52,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-14 13:12:52,349 INFO L175 Difference]: Start difference. First operand has 280 places, 337 transitions, 3576 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:12:52,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 369 transitions, 4606 flow [2024-06-14 13:12:52,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 369 transitions, 4488 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:52,830 INFO L231 Difference]: Finished difference. Result has 283 places, 341 transitions, 3623 flow [2024-06-14 13:12:52,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3623, PETRI_PLACES=283, PETRI_TRANSITIONS=341} [2024-06-14 13:12:52,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-14 13:12:52,831 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 341 transitions, 3623 flow [2024-06-14 13:12:52,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:52,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:52,831 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 13:12:52,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:12:52,831 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:52,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash 967767335, now seen corresponding path program 2 times [2024-06-14 13:12:52,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:52,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428879730] [2024-06-14 13:12:52,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:52,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:55,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:55,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428879730] [2024-06-14 13:12:55,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428879730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:55,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:55,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:55,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901601971] [2024-06-14 13:12:55,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:55,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:55,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:55,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:55,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:55,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:55,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 341 transitions, 3623 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:55,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:55,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:55,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:56,782 INFO L124 PetriNetUnfolderBase]: 2543/4216 cut-off events. [2024-06-14 13:12:56,782 INFO L125 PetriNetUnfolderBase]: For 244345/244347 co-relation queries the response was YES. [2024-06-14 13:12:56,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26812 conditions, 4216 events. 2543/4216 cut-off events. For 244345/244347 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25840 event pairs, 554 based on Foata normal form. 2/4218 useless extension candidates. Maximal degree in co-relation 26686. Up to 3935 conditions per place. [2024-06-14 13:12:56,826 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 331 selfloop transitions, 29 changer transitions 0/365 dead transitions. [2024-06-14 13:12:56,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 365 transitions, 4453 flow [2024-06-14 13:12:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:12:56,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 13:12:56,827 INFO L175 Difference]: Start difference. First operand has 283 places, 341 transitions, 3623 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:12:56,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 365 transitions, 4453 flow [2024-06-14 13:12:57,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 365 transitions, 4347 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 13:12:57,341 INFO L231 Difference]: Finished difference. Result has 287 places, 343 transitions, 3634 flow [2024-06-14 13:12:57,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3634, PETRI_PLACES=287, PETRI_TRANSITIONS=343} [2024-06-14 13:12:57,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-14 13:12:57,354 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 343 transitions, 3634 flow [2024-06-14 13:12:57,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:57,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:57,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:57,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:12:57,354 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:57,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:57,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1374999621, now seen corresponding path program 3 times [2024-06-14 13:12:57,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:57,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154199876] [2024-06-14 13:12:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:57,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:59,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:59,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154199876] [2024-06-14 13:12:59,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154199876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:59,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:59,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:59,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470616662] [2024-06-14 13:12:59,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:59,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:59,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:59,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:12:59,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 343 transitions, 3634 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:59,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:59,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:12:59,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:01,547 INFO L124 PetriNetUnfolderBase]: 2551/4228 cut-off events. [2024-06-14 13:13:01,547 INFO L125 PetriNetUnfolderBase]: For 251261/251263 co-relation queries the response was YES. [2024-06-14 13:13:01,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26925 conditions, 4228 events. 2551/4228 cut-off events. For 251261/251263 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25900 event pairs, 554 based on Foata normal form. 2/4230 useless extension candidates. Maximal degree in co-relation 26797. Up to 3964 conditions per place. [2024-06-14 13:13:01,590 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 337 selfloop transitions, 21 changer transitions 0/363 dead transitions. [2024-06-14 13:13:01,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 363 transitions, 4436 flow [2024-06-14 13:13:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:13:01,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 13:13:01,592 INFO L175 Difference]: Start difference. First operand has 287 places, 343 transitions, 3634 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:13:01,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 363 transitions, 4436 flow [2024-06-14 13:13:02,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 363 transitions, 4355 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:02,115 INFO L231 Difference]: Finished difference. Result has 289 places, 345 transitions, 3642 flow [2024-06-14 13:13:02,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3553, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3642, PETRI_PLACES=289, PETRI_TRANSITIONS=345} [2024-06-14 13:13:02,116 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-14 13:13:02,116 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 345 transitions, 3642 flow [2024-06-14 13:13:02,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:02,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:02,116 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 13:13:02,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:13:02,116 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:02,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:02,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1374814923, now seen corresponding path program 1 times [2024-06-14 13:13:02,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:02,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63041025] [2024-06-14 13:13:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:02,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:05,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:05,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63041025] [2024-06-14 13:13:05,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63041025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:05,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:05,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:05,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037915060] [2024-06-14 13:13:05,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:05,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:05,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:05,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:05,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:05,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 345 transitions, 3642 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:05,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:05,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:05,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:07,899 INFO L124 PetriNetUnfolderBase]: 2559/4236 cut-off events. [2024-06-14 13:13:07,899 INFO L125 PetriNetUnfolderBase]: For 258161/258163 co-relation queries the response was YES. [2024-06-14 13:13:07,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27063 conditions, 4236 events. 2559/4236 cut-off events. For 258161/258163 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25954 event pairs, 532 based on Foata normal form. 2/4238 useless extension candidates. Maximal degree in co-relation 26934. Up to 3953 conditions per place. [2024-06-14 13:13:07,968 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 335 selfloop transitions, 28 changer transitions 0/368 dead transitions. [2024-06-14 13:13:07,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 368 transitions, 4464 flow [2024-06-14 13:13:07,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:07,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:13:07,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 13:13:07,973 INFO L175 Difference]: Start difference. First operand has 289 places, 345 transitions, 3642 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:13:07,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 368 transitions, 4464 flow [2024-06-14 13:13:08,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 368 transitions, 4395 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:08,671 INFO L231 Difference]: Finished difference. Result has 291 places, 347 transitions, 3680 flow [2024-06-14 13:13:08,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3680, PETRI_PLACES=291, PETRI_TRANSITIONS=347} [2024-06-14 13:13:08,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-14 13:13:08,673 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 347 transitions, 3680 flow [2024-06-14 13:13:08,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:08,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:08,673 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 13:13:08,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:13:08,674 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:08,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:08,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1996491289, now seen corresponding path program 4 times [2024-06-14 13:13:08,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:08,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738263080] [2024-06-14 13:13:08,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:08,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:10,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:10,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738263080] [2024-06-14 13:13:10,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738263080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:10,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:10,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:10,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582138272] [2024-06-14 13:13:10,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:10,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:10,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:10,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:10,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:10,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:10,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 347 transitions, 3680 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:10,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:10,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:10,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:12,435 INFO L124 PetriNetUnfolderBase]: 2554/4227 cut-off events. [2024-06-14 13:13:12,435 INFO L125 PetriNetUnfolderBase]: For 260216/260218 co-relation queries the response was YES. [2024-06-14 13:13:12,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27027 conditions, 4227 events. 2554/4227 cut-off events. For 260216/260218 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25843 event pairs, 515 based on Foata normal form. 2/4229 useless extension candidates. Maximal degree in co-relation 26897. Up to 3927 conditions per place. [2024-06-14 13:13:12,490 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 337 selfloop transitions, 30 changer transitions 0/372 dead transitions. [2024-06-14 13:13:12,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 372 transitions, 4484 flow [2024-06-14 13:13:12,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:12,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:12,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:13:12,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-14 13:13:12,492 INFO L175 Difference]: Start difference. First operand has 291 places, 347 transitions, 3680 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:13:12,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 372 transitions, 4484 flow [2024-06-14 13:13:13,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 372 transitions, 4369 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:13,166 INFO L231 Difference]: Finished difference. Result has 292 places, 347 transitions, 3636 flow [2024-06-14 13:13:13,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3636, PETRI_PLACES=292, PETRI_TRANSITIONS=347} [2024-06-14 13:13:13,167 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-14 13:13:13,167 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 347 transitions, 3636 flow [2024-06-14 13:13:13,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:13,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:13,168 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 13:13:13,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:13:13,168 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:13,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:13,168 INFO L85 PathProgramCache]: Analyzing trace with hash -426415947, now seen corresponding path program 2 times [2024-06-14 13:13:13,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:13,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614581668] [2024-06-14 13:13:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:13,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:16,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:16,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614581668] [2024-06-14 13:13:16,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614581668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:16,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:16,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:16,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005218919] [2024-06-14 13:13:16,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:16,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:16,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:16,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:16,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:16,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:16,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 347 transitions, 3636 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:16,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:16,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:16,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:18,325 INFO L124 PetriNetUnfolderBase]: 2562/4241 cut-off events. [2024-06-14 13:13:18,325 INFO L125 PetriNetUnfolderBase]: For 266919/266921 co-relation queries the response was YES. [2024-06-14 13:13:18,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27153 conditions, 4241 events. 2562/4241 cut-off events. For 266919/266921 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25976 event pairs, 531 based on Foata normal form. 2/4243 useless extension candidates. Maximal degree in co-relation 27022. Up to 3952 conditions per place. [2024-06-14 13:13:18,383 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 334 selfloop transitions, 30 changer transitions 0/369 dead transitions. [2024-06-14 13:13:18,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 369 transitions, 4462 flow [2024-06-14 13:13:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:13:18,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:13:18,385 INFO L175 Difference]: Start difference. First operand has 292 places, 347 transitions, 3636 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:13:18,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 369 transitions, 4462 flow [2024-06-14 13:13:19,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 369 transitions, 4393 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:19,009 INFO L231 Difference]: Finished difference. Result has 293 places, 349 transitions, 3685 flow [2024-06-14 13:13:19,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3685, PETRI_PLACES=293, PETRI_TRANSITIONS=349} [2024-06-14 13:13:19,009 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 249 predicate places. [2024-06-14 13:13:19,009 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 349 transitions, 3685 flow [2024-06-14 13:13:19,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:19,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:19,010 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 13:13:19,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:13:19,010 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:19,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1768174801, now seen corresponding path program 3 times [2024-06-14 13:13:19,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:19,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102308805] [2024-06-14 13:13:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:19,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:22,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:22,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102308805] [2024-06-14 13:13:22,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102308805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:22,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:22,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:22,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620780988] [2024-06-14 13:13:22,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:22,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:22,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:22,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:22,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:22,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 349 transitions, 3685 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:22,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:22,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:22,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:24,352 INFO L124 PetriNetUnfolderBase]: 2570/4258 cut-off events. [2024-06-14 13:13:24,352 INFO L125 PetriNetUnfolderBase]: For 268362/268366 co-relation queries the response was YES. [2024-06-14 13:13:24,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27361 conditions, 4258 events. 2570/4258 cut-off events. For 268362/268366 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 26084 event pairs, 538 based on Foata normal form. 4/4262 useless extension candidates. Maximal degree in co-relation 27229. Up to 3970 conditions per place. [2024-06-14 13:13:24,407 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 334 selfloop transitions, 27 changer transitions 0/366 dead transitions. [2024-06-14 13:13:24,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 366 transitions, 4495 flow [2024-06-14 13:13:24,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 13:13:24,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-14 13:13:24,408 INFO L175 Difference]: Start difference. First operand has 293 places, 349 transitions, 3685 flow. Second operand 7 states and 113 transitions. [2024-06-14 13:13:24,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 366 transitions, 4495 flow [2024-06-14 13:13:25,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 366 transitions, 4393 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:25,132 INFO L231 Difference]: Finished difference. Result has 295 places, 351 transitions, 3696 flow [2024-06-14 13:13:25,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3696, PETRI_PLACES=295, PETRI_TRANSITIONS=351} [2024-06-14 13:13:25,132 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-14 13:13:25,132 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 351 transitions, 3696 flow [2024-06-14 13:13:25,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:25,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:25,133 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 13:13:25,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:13:25,133 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:25,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1759834561, now seen corresponding path program 4 times [2024-06-14 13:13:25,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:25,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969120194] [2024-06-14 13:13:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:25,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:28,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:28,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969120194] [2024-06-14 13:13:28,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969120194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:28,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:28,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:28,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149618473] [2024-06-14 13:13:28,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:28,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:28,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:28,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:28,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:28,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:28,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 351 transitions, 3696 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:28,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:28,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:28,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:30,052 INFO L124 PetriNetUnfolderBase]: 2565/4251 cut-off events. [2024-06-14 13:13:30,052 INFO L125 PetriNetUnfolderBase]: For 262616/262620 co-relation queries the response was YES. [2024-06-14 13:13:30,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27072 conditions, 4251 events. 2565/4251 cut-off events. For 262616/262620 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 26056 event pairs, 529 based on Foata normal form. 4/4255 useless extension candidates. Maximal degree in co-relation 26939. Up to 3937 conditions per place. [2024-06-14 13:13:30,132 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 329 selfloop transitions, 34 changer transitions 0/368 dead transitions. [2024-06-14 13:13:30,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 368 transitions, 4510 flow [2024-06-14 13:13:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 13:13:30,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-14 13:13:30,134 INFO L175 Difference]: Start difference. First operand has 295 places, 351 transitions, 3696 flow. Second operand 7 states and 113 transitions. [2024-06-14 13:13:30,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 368 transitions, 4510 flow [2024-06-14 13:13:31,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 368 transitions, 4417 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:31,071 INFO L231 Difference]: Finished difference. Result has 297 places, 353 transitions, 3730 flow [2024-06-14 13:13:31,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3603, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3730, PETRI_PLACES=297, PETRI_TRANSITIONS=353} [2024-06-14 13:13:31,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-14 13:13:31,071 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 353 transitions, 3730 flow [2024-06-14 13:13:31,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:31,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:31,072 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 13:13:31,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:13:31,072 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:31,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash -954587168, now seen corresponding path program 1 times [2024-06-14 13:13:31,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:31,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366960909] [2024-06-14 13:13:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:31,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:34,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:34,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366960909] [2024-06-14 13:13:34,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366960909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:34,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:34,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:34,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422711207] [2024-06-14 13:13:34,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:34,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:34,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:34,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:34,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:34,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:34,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 353 transitions, 3730 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:34,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:34,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:34,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:36,068 INFO L124 PetriNetUnfolderBase]: 2641/4380 cut-off events. [2024-06-14 13:13:36,068 INFO L125 PetriNetUnfolderBase]: For 286209/286215 co-relation queries the response was YES. [2024-06-14 13:13:36,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27843 conditions, 4380 events. 2641/4380 cut-off events. For 286209/286215 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 26860 event pairs, 457 based on Foata normal form. 14/4394 useless extension candidates. Maximal degree in co-relation 27709. Up to 3762 conditions per place. [2024-06-14 13:13:36,211 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 343 selfloop transitions, 59 changer transitions 0/407 dead transitions. [2024-06-14 13:13:36,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 407 transitions, 4911 flow [2024-06-14 13:13:36,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:13:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:13:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-14 13:13:36,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39957716701902746 [2024-06-14 13:13:36,213 INFO L175 Difference]: Start difference. First operand has 297 places, 353 transitions, 3730 flow. Second operand 11 states and 189 transitions. [2024-06-14 13:13:36,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 407 transitions, 4911 flow [2024-06-14 13:13:36,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 407 transitions, 4800 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:36,869 INFO L231 Difference]: Finished difference. Result has 305 places, 358 transitions, 3830 flow [2024-06-14 13:13:36,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3619, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3830, PETRI_PLACES=305, PETRI_TRANSITIONS=358} [2024-06-14 13:13:36,870 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-14 13:13:36,870 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 358 transitions, 3830 flow [2024-06-14 13:13:36,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:36,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:36,870 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 13:13:36,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:13:36,870 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:36,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:36,871 INFO L85 PathProgramCache]: Analyzing trace with hash -706356062, now seen corresponding path program 2 times [2024-06-14 13:13:36,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:36,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564485517] [2024-06-14 13:13:36,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:36,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:40,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:40,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564485517] [2024-06-14 13:13:40,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564485517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:40,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:40,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:40,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369536440] [2024-06-14 13:13:40,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:40,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:40,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:40,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:40,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:40,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 358 transitions, 3830 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:40,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:40,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:40,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:42,342 INFO L124 PetriNetUnfolderBase]: 2733/4532 cut-off events. [2024-06-14 13:13:42,342 INFO L125 PetriNetUnfolderBase]: For 295111/295117 co-relation queries the response was YES. [2024-06-14 13:13:42,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29029 conditions, 4532 events. 2733/4532 cut-off events. For 295111/295117 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 28057 event pairs, 557 based on Foata normal form. 14/4546 useless extension candidates. Maximal degree in co-relation 28892. Up to 4048 conditions per place. [2024-06-14 13:13:42,400 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 347 selfloop transitions, 64 changer transitions 0/416 dead transitions. [2024-06-14 13:13:42,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 416 transitions, 4980 flow [2024-06-14 13:13:42,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:13:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:13:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 196 transitions. [2024-06-14 13:13:42,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-14 13:13:42,402 INFO L175 Difference]: Start difference. First operand has 305 places, 358 transitions, 3830 flow. Second operand 12 states and 196 transitions. [2024-06-14 13:13:42,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 416 transitions, 4980 flow [2024-06-14 13:13:43,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 416 transitions, 4804 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 13:13:43,158 INFO L231 Difference]: Finished difference. Result has 310 places, 371 transitions, 3974 flow [2024-06-14 13:13:43,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3974, PETRI_PLACES=310, PETRI_TRANSITIONS=371} [2024-06-14 13:13:43,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-14 13:13:43,159 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 371 transitions, 3974 flow [2024-06-14 13:13:43,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:43,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:43,159 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 13:13:43,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:13:43,160 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:43,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:43,160 INFO L85 PathProgramCache]: Analyzing trace with hash -478561570, now seen corresponding path program 1 times [2024-06-14 13:13:43,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:43,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914721562] [2024-06-14 13:13:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:43,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:46,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:46,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914721562] [2024-06-14 13:13:46,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914721562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:46,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:46,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:46,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268917020] [2024-06-14 13:13:46,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:46,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:46,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:46,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:46,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:46,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:46,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 371 transitions, 3974 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:46,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:46,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:46,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:48,499 INFO L124 PetriNetUnfolderBase]: 2746/4548 cut-off events. [2024-06-14 13:13:48,499 INFO L125 PetriNetUnfolderBase]: For 285806/285812 co-relation queries the response was YES. [2024-06-14 13:13:48,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29154 conditions, 4548 events. 2746/4548 cut-off events. For 285806/285812 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 28156 event pairs, 579 based on Foata normal form. 7/4555 useless extension candidates. Maximal degree in co-relation 29017. Up to 4124 conditions per place. [2024-06-14 13:13:48,557 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 348 selfloop transitions, 63 changer transitions 0/416 dead transitions. [2024-06-14 13:13:48,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 416 transitions, 5180 flow [2024-06-14 13:13:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:13:48,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:13:48,559 INFO L175 Difference]: Start difference. First operand has 310 places, 371 transitions, 3974 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:13:48,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 416 transitions, 5180 flow [2024-06-14 13:13:49,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 416 transitions, 5046 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:13:49,379 INFO L231 Difference]: Finished difference. Result has 312 places, 377 transitions, 4098 flow [2024-06-14 13:13:49,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3840, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4098, PETRI_PLACES=312, PETRI_TRANSITIONS=377} [2024-06-14 13:13:49,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-14 13:13:49,386 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 377 transitions, 4098 flow [2024-06-14 13:13:49,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:49,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:49,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:49,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:13:49,387 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:49,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash -865929338, now seen corresponding path program 2 times [2024-06-14 13:13:49,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:49,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586717858] [2024-06-14 13:13:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:49,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:53,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:53,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586717858] [2024-06-14 13:13:53,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586717858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:53,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:53,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:53,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791804247] [2024-06-14 13:13:53,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:53,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:53,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:53,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:53,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:53,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:53,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 377 transitions, 4098 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:53,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:53,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:53,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:55,223 INFO L124 PetriNetUnfolderBase]: 2761/4571 cut-off events. [2024-06-14 13:13:55,223 INFO L125 PetriNetUnfolderBase]: For 295003/295009 co-relation queries the response was YES. [2024-06-14 13:13:55,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29713 conditions, 4571 events. 2761/4571 cut-off events. For 295003/295009 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 28302 event pairs, 579 based on Foata normal form. 7/4578 useless extension candidates. Maximal degree in co-relation 29575. Up to 4164 conditions per place. [2024-06-14 13:13:55,278 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 351 selfloop transitions, 64 changer transitions 0/420 dead transitions. [2024-06-14 13:13:55,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 420 transitions, 5164 flow [2024-06-14 13:13:55,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:55,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:13:55,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:13:55,280 INFO L175 Difference]: Start difference. First operand has 312 places, 377 transitions, 4098 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:13:55,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 420 transitions, 5164 flow [2024-06-14 13:13:55,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 420 transitions, 4985 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:55,863 INFO L231 Difference]: Finished difference. Result has 316 places, 386 transitions, 4196 flow [2024-06-14 13:13:55,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3949, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4196, PETRI_PLACES=316, PETRI_TRANSITIONS=386} [2024-06-14 13:13:55,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-14 13:13:55,864 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 386 transitions, 4196 flow [2024-06-14 13:13:55,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:55,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:55,864 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 13:13:55,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:13:55,865 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:55,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:55,865 INFO L85 PathProgramCache]: Analyzing trace with hash -865929152, now seen corresponding path program 1 times [2024-06-14 13:13:55,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:55,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972697218] [2024-06-14 13:13:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:55,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:59,032 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 13:13:59,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:59,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972697218] [2024-06-14 13:13:59,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972697218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:59,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:59,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:59,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256609295] [2024-06-14 13:13:59,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:59,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:59,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:59,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:59,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:59,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:13:59,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 386 transitions, 4196 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:59,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:59,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:13:59,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:00,819 INFO L124 PetriNetUnfolderBase]: 2787/4607 cut-off events. [2024-06-14 13:14:00,820 INFO L125 PetriNetUnfolderBase]: For 312000/312006 co-relation queries the response was YES. [2024-06-14 13:14:00,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30306 conditions, 4607 events. 2787/4607 cut-off events. For 312000/312006 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 28587 event pairs, 567 based on Foata normal form. 8/4615 useless extension candidates. Maximal degree in co-relation 30166. Up to 4128 conditions per place. [2024-06-14 13:14:00,879 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 348 selfloop transitions, 80 changer transitions 0/433 dead transitions. [2024-06-14 13:14:00,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 433 transitions, 5436 flow [2024-06-14 13:14:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:14:00,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:14:00,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-14 13:14:00,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39323467230443976 [2024-06-14 13:14:00,881 INFO L175 Difference]: Start difference. First operand has 316 places, 386 transitions, 4196 flow. Second operand 11 states and 186 transitions. [2024-06-14 13:14:00,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 433 transitions, 5436 flow [2024-06-14 13:14:01,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 433 transitions, 5277 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:01,706 INFO L231 Difference]: Finished difference. Result has 321 places, 392 transitions, 4326 flow [2024-06-14 13:14:01,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4037, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4326, PETRI_PLACES=321, PETRI_TRANSITIONS=392} [2024-06-14 13:14:01,707 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-14 13:14:01,708 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 392 transitions, 4326 flow [2024-06-14 13:14:01,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:01,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:01,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:01,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:14:01,708 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:01,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:01,709 INFO L85 PathProgramCache]: Analyzing trace with hash -878753696, now seen corresponding path program 2 times [2024-06-14 13:14:01,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:01,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303521340] [2024-06-14 13:14:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:01,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:05,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:05,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303521340] [2024-06-14 13:14:05,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303521340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:05,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:05,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:05,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275417819] [2024-06-14 13:14:05,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:05,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:05,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:05,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:05,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:05,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 392 transitions, 4326 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:05,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:05,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:05,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:08,377 INFO L124 PetriNetUnfolderBase]: 2823/4657 cut-off events. [2024-06-14 13:14:08,378 INFO L125 PetriNetUnfolderBase]: For 328703/328709 co-relation queries the response was YES. [2024-06-14 13:14:08,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31361 conditions, 4657 events. 2823/4657 cut-off events. For 328703/328709 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28864 event pairs, 565 based on Foata normal form. 8/4665 useless extension candidates. Maximal degree in co-relation 31220. Up to 4161 conditions per place. [2024-06-14 13:14:08,433 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 356 selfloop transitions, 91 changer transitions 0/452 dead transitions. [2024-06-14 13:14:08,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 452 transitions, 5860 flow [2024-06-14 13:14:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:14:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:14:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 228 transitions. [2024-06-14 13:14:08,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-14 13:14:08,435 INFO L175 Difference]: Start difference. First operand has 321 places, 392 transitions, 4326 flow. Second operand 14 states and 228 transitions. [2024-06-14 13:14:08,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 452 transitions, 5860 flow [2024-06-14 13:14:09,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 452 transitions, 5675 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:09,407 INFO L231 Difference]: Finished difference. Result has 329 places, 404 transitions, 4547 flow [2024-06-14 13:14:09,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4173, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4547, PETRI_PLACES=329, PETRI_TRANSITIONS=404} [2024-06-14 13:14:09,410 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-14 13:14:09,410 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 404 transitions, 4547 flow [2024-06-14 13:14:09,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:09,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:09,410 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 13:14:09,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:14:09,410 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:09,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:09,411 INFO L85 PathProgramCache]: Analyzing trace with hash -707215948, now seen corresponding path program 3 times [2024-06-14 13:14:09,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:09,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605217864] [2024-06-14 13:14:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:09,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:13,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:13,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605217864] [2024-06-14 13:14:13,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605217864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:13,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:13,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314081186] [2024-06-14 13:14:13,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:13,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:13,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:13,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:13,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:13,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:13,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 404 transitions, 4547 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:13,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:13,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:13,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:15,590 INFO L124 PetriNetUnfolderBase]: 2817/4653 cut-off events. [2024-06-14 13:14:15,590 INFO L125 PetriNetUnfolderBase]: For 329327/329333 co-relation queries the response was YES. [2024-06-14 13:14:15,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31340 conditions, 4653 events. 2817/4653 cut-off events. For 329327/329333 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 28904 event pairs, 565 based on Foata normal form. 8/4661 useless extension candidates. Maximal degree in co-relation 31196. Up to 4156 conditions per place. [2024-06-14 13:14:15,644 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 352 selfloop transitions, 93 changer transitions 0/450 dead transitions. [2024-06-14 13:14:15,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 450 transitions, 5719 flow [2024-06-14 13:14:15,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:14:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:14:15,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 224 transitions. [2024-06-14 13:14:15,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:14:15,647 INFO L175 Difference]: Start difference. First operand has 329 places, 404 transitions, 4547 flow. Second operand 14 states and 224 transitions. [2024-06-14 13:14:15,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 450 transitions, 5719 flow [2024-06-14 13:14:16,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 450 transitions, 5473 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-06-14 13:14:16,611 INFO L231 Difference]: Finished difference. Result has 332 places, 404 transitions, 4493 flow [2024-06-14 13:14:16,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4493, PETRI_PLACES=332, PETRI_TRANSITIONS=404} [2024-06-14 13:14:16,611 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-14 13:14:16,612 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 404 transitions, 4493 flow [2024-06-14 13:14:16,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:16,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:16,612 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 13:14:16,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:14:16,612 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:16,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:16,613 INFO L85 PathProgramCache]: Analyzing trace with hash -706263992, now seen corresponding path program 3 times [2024-06-14 13:14:16,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:16,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296986897] [2024-06-14 13:14:16,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:16,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:20,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:20,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296986897] [2024-06-14 13:14:20,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296986897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:20,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:20,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:20,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819124867] [2024-06-14 13:14:20,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:20,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:20,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:20,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:20,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:20,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:20,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 404 transitions, 4493 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:20,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:20,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:20,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:22,333 INFO L124 PetriNetUnfolderBase]: 2822/4662 cut-off events. [2024-06-14 13:14:22,334 INFO L125 PetriNetUnfolderBase]: For 333173/333179 co-relation queries the response was YES. [2024-06-14 13:14:22,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31391 conditions, 4662 events. 2822/4662 cut-off events. For 333173/333179 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 28934 event pairs, 584 based on Foata normal form. 7/4669 useless extension candidates. Maximal degree in co-relation 31246. Up to 4242 conditions per place. [2024-06-14 13:14:22,417 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 365 selfloop transitions, 74 changer transitions 0/444 dead transitions. [2024-06-14 13:14:22,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 444 transitions, 5525 flow [2024-06-14 13:14:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:14:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:14:22,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-14 13:14:22,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:14:22,419 INFO L175 Difference]: Start difference. First operand has 332 places, 404 transitions, 4493 flow. Second operand 12 states and 192 transitions. [2024-06-14 13:14:22,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 444 transitions, 5525 flow [2024-06-14 13:14:23,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 444 transitions, 5347 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-14 13:14:23,689 INFO L231 Difference]: Finished difference. Result has 333 places, 407 transitions, 4524 flow [2024-06-14 13:14:23,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4315, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4524, PETRI_PLACES=333, PETRI_TRANSITIONS=407} [2024-06-14 13:14:23,690 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-14 13:14:23,690 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 407 transitions, 4524 flow [2024-06-14 13:14:23,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:23,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:23,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:23,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:14:23,708 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:23,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:23,709 INFO L85 PathProgramCache]: Analyzing trace with hash -402783424, now seen corresponding path program 3 times [2024-06-14 13:14:23,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:23,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013903442] [2024-06-14 13:14:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:23,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:27,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:27,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013903442] [2024-06-14 13:14:27,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013903442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:27,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:27,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:27,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914284790] [2024-06-14 13:14:27,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:27,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:27,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:27,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:27,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:27,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:27,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 407 transitions, 4524 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:27,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:27,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:27,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:29,364 INFO L124 PetriNetUnfolderBase]: 2858/4709 cut-off events. [2024-06-14 13:14:29,365 INFO L125 PetriNetUnfolderBase]: For 364955/364957 co-relation queries the response was YES. [2024-06-14 13:14:29,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31771 conditions, 4709 events. 2858/4709 cut-off events. For 364955/364957 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 29146 event pairs, 571 based on Foata normal form. 8/4717 useless extension candidates. Maximal degree in co-relation 31625. Up to 4230 conditions per place. [2024-06-14 13:14:29,416 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 380 selfloop transitions, 61 changer transitions 0/446 dead transitions. [2024-06-14 13:14:29,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 446 transitions, 5585 flow [2024-06-14 13:14:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:14:29,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:14:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 191 transitions. [2024-06-14 13:14:29,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3701550387596899 [2024-06-14 13:14:29,418 INFO L175 Difference]: Start difference. First operand has 333 places, 407 transitions, 4524 flow. Second operand 12 states and 191 transitions. [2024-06-14 13:14:29,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 446 transitions, 5585 flow [2024-06-14 13:14:30,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 446 transitions, 5360 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-14 13:14:30,586 INFO L231 Difference]: Finished difference. Result has 334 places, 410 transitions, 4485 flow [2024-06-14 13:14:30,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4299, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4485, PETRI_PLACES=334, PETRI_TRANSITIONS=410} [2024-06-14 13:14:30,587 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-14 13:14:30,587 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 410 transitions, 4485 flow [2024-06-14 13:14:30,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:30,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:30,587 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 13:14:30,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:14:30,587 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:30,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash 838306534, now seen corresponding path program 4 times [2024-06-14 13:14:30,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:30,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491539240] [2024-06-14 13:14:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:30,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:34,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:34,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491539240] [2024-06-14 13:14:34,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491539240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:34,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:34,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:34,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953992739] [2024-06-14 13:14:34,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:34,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:34,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:34,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:34,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:34,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:34,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 410 transitions, 4485 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:34,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:34,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:34,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:36,669 INFO L124 PetriNetUnfolderBase]: 2879/4741 cut-off events. [2024-06-14 13:14:36,669 INFO L125 PetriNetUnfolderBase]: For 358329/358331 co-relation queries the response was YES. [2024-06-14 13:14:36,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32335 conditions, 4741 events. 2879/4741 cut-off events. For 358329/358331 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 29398 event pairs, 614 based on Foata normal form. 1/4741 useless extension candidates. Maximal degree in co-relation 32188. Up to 4007 conditions per place. [2024-06-14 13:14:36,848 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 300 selfloop transitions, 154 changer transitions 0/459 dead transitions. [2024-06-14 13:14:36,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 459 transitions, 6421 flow [2024-06-14 13:14:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-14 13:14:36,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-14 13:14:36,850 INFO L175 Difference]: Start difference. First operand has 334 places, 410 transitions, 4485 flow. Second operand 9 states and 169 transitions. [2024-06-14 13:14:36,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 459 transitions, 6421 flow [2024-06-14 13:14:38,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 459 transitions, 6288 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:38,228 INFO L231 Difference]: Finished difference. Result has 336 places, 422 transitions, 4944 flow [2024-06-14 13:14:38,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4352, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4944, PETRI_PLACES=336, PETRI_TRANSITIONS=422} [2024-06-14 13:14:38,229 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-14 13:14:38,229 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 422 transitions, 4944 flow [2024-06-14 13:14:38,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:38,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:38,229 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 13:14:38,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:14:38,230 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:38,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1586870178, now seen corresponding path program 4 times [2024-06-14 13:14:38,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:38,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733549603] [2024-06-14 13:14:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:38,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:41,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733549603] [2024-06-14 13:14:41,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733549603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:41,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:41,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:41,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620207701] [2024-06-14 13:14:41,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:41,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:41,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:41,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:41,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:41,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:41,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 422 transitions, 4944 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:41,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:41,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:41,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:43,374 INFO L124 PetriNetUnfolderBase]: 2926/4818 cut-off events. [2024-06-14 13:14:43,375 INFO L125 PetriNetUnfolderBase]: For 387944/387948 co-relation queries the response was YES. [2024-06-14 13:14:43,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33864 conditions, 4818 events. 2926/4818 cut-off events. For 387944/387948 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 29906 event pairs, 597 based on Foata normal form. 4/4822 useless extension candidates. Maximal degree in co-relation 33716. Up to 4099 conditions per place. [2024-06-14 13:14:43,440 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 314 selfloop transitions, 154 changer transitions 0/473 dead transitions. [2024-06-14 13:14:43,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 473 transitions, 6703 flow [2024-06-14 13:14:43,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:14:43,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:14:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-14 13:14:43,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-14 13:14:43,442 INFO L175 Difference]: Start difference. First operand has 336 places, 422 transitions, 4944 flow. Second operand 12 states and 202 transitions. [2024-06-14 13:14:43,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 473 transitions, 6703 flow [2024-06-14 13:14:45,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 473 transitions, 6488 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-14 13:14:45,031 INFO L231 Difference]: Finished difference. Result has 345 places, 434 transitions, 5274 flow [2024-06-14 13:14:45,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4729, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5274, PETRI_PLACES=345, PETRI_TRANSITIONS=434} [2024-06-14 13:14:45,032 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-14 13:14:45,032 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 434 transitions, 5274 flow [2024-06-14 13:14:45,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:45,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:45,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:45,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:14:45,033 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:45,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1604336538, now seen corresponding path program 5 times [2024-06-14 13:14:45,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:45,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361165172] [2024-06-14 13:14:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:45,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:48,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:48,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361165172] [2024-06-14 13:14:48,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361165172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:48,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:48,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:48,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041142165] [2024-06-14 13:14:48,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:48,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:48,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:48,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:48,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:49,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:49,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 434 transitions, 5274 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:49,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:49,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:49,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:51,001 INFO L124 PetriNetUnfolderBase]: 2931/4827 cut-off events. [2024-06-14 13:14:51,001 INFO L125 PetriNetUnfolderBase]: For 395708/395712 co-relation queries the response was YES. [2024-06-14 13:14:51,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34634 conditions, 4827 events. 2931/4827 cut-off events. For 395708/395712 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29996 event pairs, 612 based on Foata normal form. 3/4830 useless extension candidates. Maximal degree in co-relation 34484. Up to 4300 conditions per place. [2024-06-14 13:14:51,066 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 359 selfloop transitions, 102 changer transitions 0/466 dead transitions. [2024-06-14 13:14:51,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 466 transitions, 6318 flow [2024-06-14 13:14:51,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:14:51,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 13:14:51,067 INFO L175 Difference]: Start difference. First operand has 345 places, 434 transitions, 5274 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:14:51,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 466 transitions, 6318 flow [2024-06-14 13:14:52,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 466 transitions, 6068 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:52,724 INFO L231 Difference]: Finished difference. Result has 349 places, 437 transitions, 5282 flow [2024-06-14 13:14:52,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5024, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5282, PETRI_PLACES=349, PETRI_TRANSITIONS=437} [2024-06-14 13:14:52,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-14 13:14:52,725 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 437 transitions, 5282 flow [2024-06-14 13:14:52,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:52,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:52,727 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 13:14:52,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:14:52,727 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:52,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:52,728 INFO L85 PathProgramCache]: Analyzing trace with hash -897319224, now seen corresponding path program 6 times [2024-06-14 13:14:52,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:52,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537802988] [2024-06-14 13:14:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:52,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:56,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:56,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537802988] [2024-06-14 13:14:56,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537802988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:56,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:56,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:14:56,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17172275] [2024-06-14 13:14:56,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:56,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:14:56,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:56,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:14:56,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:14:56,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:14:56,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 437 transitions, 5282 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:56,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:56,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:14:56,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:58,504 INFO L124 PetriNetUnfolderBase]: 2936/4834 cut-off events. [2024-06-14 13:14:58,504 INFO L125 PetriNetUnfolderBase]: For 402621/402623 co-relation queries the response was YES. [2024-06-14 13:14:58,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34742 conditions, 4834 events. 2936/4834 cut-off events. For 402621/402623 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 30038 event pairs, 620 based on Foata normal form. 1/4834 useless extension candidates. Maximal degree in co-relation 34590. Up to 4081 conditions per place. [2024-06-14 13:14:58,563 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 300 selfloop transitions, 171 changer transitions 0/476 dead transitions. [2024-06-14 13:14:58,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 476 transitions, 6878 flow [2024-06-14 13:14:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:58,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:14:58,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-14 13:14:58,565 INFO L175 Difference]: Start difference. First operand has 349 places, 437 transitions, 5282 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:14:58,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 476 transitions, 6878 flow [2024-06-14 13:14:59,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 476 transitions, 6642 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:59,931 INFO L231 Difference]: Finished difference. Result has 351 places, 440 transitions, 5440 flow [2024-06-14 13:14:59,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5046, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5440, PETRI_PLACES=351, PETRI_TRANSITIONS=440} [2024-06-14 13:14:59,931 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-14 13:14:59,931 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 440 transitions, 5440 flow [2024-06-14 13:14:59,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:59,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:59,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:59,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:14:59,932 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:59,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1598795598, now seen corresponding path program 7 times [2024-06-14 13:14:59,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:59,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176183371] [2024-06-14 13:14:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:59,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:59,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:03,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:03,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176183371] [2024-06-14 13:15:03,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176183371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:03,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:03,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:03,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127553046] [2024-06-14 13:15:03,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:03,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:03,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:03,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:03,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 440 transitions, 5440 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:03,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:03,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:03,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:05,414 INFO L124 PetriNetUnfolderBase]: 2941/4843 cut-off events. [2024-06-14 13:15:05,414 INFO L125 PetriNetUnfolderBase]: For 408223/408225 co-relation queries the response was YES. [2024-06-14 13:15:05,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34677 conditions, 4843 events. 2941/4843 cut-off events. For 408223/408225 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30187 event pairs, 620 based on Foata normal form. 1/4843 useless extension candidates. Maximal degree in co-relation 34524. Up to 4087 conditions per place. [2024-06-14 13:15:05,479 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 296 selfloop transitions, 173 changer transitions 0/474 dead transitions. [2024-06-14 13:15:05,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 474 transitions, 6858 flow [2024-06-14 13:15:05,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:05,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:05,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:15:05,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 13:15:05,481 INFO L175 Difference]: Start difference. First operand has 351 places, 440 transitions, 5440 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:15:05,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 474 transitions, 6858 flow [2024-06-14 13:15:06,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 474 transitions, 6458 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:06,960 INFO L231 Difference]: Finished difference. Result has 353 places, 443 transitions, 5444 flow [2024-06-14 13:15:06,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5050, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5444, PETRI_PLACES=353, PETRI_TRANSITIONS=443} [2024-06-14 13:15:06,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-14 13:15:06,961 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 443 transitions, 5444 flow [2024-06-14 13:15:06,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:06,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:06,973 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 13:15:06,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:15:06,974 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:06,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1598795226, now seen corresponding path program 1 times [2024-06-14 13:15:06,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:06,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470332375] [2024-06-14 13:15:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:06,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:10,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:10,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470332375] [2024-06-14 13:15:10,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470332375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:10,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:10,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:10,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862816207] [2024-06-14 13:15:10,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:10,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:10,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:10,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:10,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:11,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:11,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 443 transitions, 5444 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:11,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:11,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:11,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:13,201 INFO L124 PetriNetUnfolderBase]: 2983/4902 cut-off events. [2024-06-14 13:15:13,202 INFO L125 PetriNetUnfolderBase]: For 436470/436476 co-relation queries the response was YES. [2024-06-14 13:15:13,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35509 conditions, 4902 events. 2983/4902 cut-off events. For 436470/436476 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 30444 event pairs, 606 based on Foata normal form. 8/4909 useless extension candidates. Maximal degree in co-relation 35355. Up to 4296 conditions per place. [2024-06-14 13:15:13,260 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 356 selfloop transitions, 131 changer transitions 0/492 dead transitions. [2024-06-14 13:15:13,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 492 transitions, 7038 flow [2024-06-14 13:15:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:15:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:15:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-14 13:15:13,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-14 13:15:13,261 INFO L175 Difference]: Start difference. First operand has 353 places, 443 transitions, 5444 flow. Second operand 12 states and 200 transitions. [2024-06-14 13:15:13,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 492 transitions, 7038 flow [2024-06-14 13:15:14,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 492 transitions, 6716 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:14,571 INFO L231 Difference]: Finished difference. Result has 359 places, 452 transitions, 5558 flow [2024-06-14 13:15:14,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5122, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5558, PETRI_PLACES=359, PETRI_TRANSITIONS=452} [2024-06-14 13:15:14,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-14 13:15:14,572 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 452 transitions, 5558 flow [2024-06-14 13:15:14,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:14,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:14,572 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 13:15:14,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:15:14,573 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:14,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:14,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1595082108, now seen corresponding path program 8 times [2024-06-14 13:15:14,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:14,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856109757] [2024-06-14 13:15:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:14,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:17,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:17,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856109757] [2024-06-14 13:15:17,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856109757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:17,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:17,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:17,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739130084] [2024-06-14 13:15:17,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:17,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:17,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:17,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:17,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:17,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:17,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 452 transitions, 5558 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:17,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:17,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:17,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:20,259 INFO L124 PetriNetUnfolderBase]: 3001/4938 cut-off events. [2024-06-14 13:15:20,260 INFO L125 PetriNetUnfolderBase]: For 447861/447865 co-relation queries the response was YES. [2024-06-14 13:15:20,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36134 conditions, 4938 events. 3001/4938 cut-off events. For 447861/447865 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 30813 event pairs, 615 based on Foata normal form. 3/4941 useless extension candidates. Maximal degree in co-relation 35979. Up to 4381 conditions per place. [2024-06-14 13:15:20,328 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 368 selfloop transitions, 116 changer transitions 0/489 dead transitions. [2024-06-14 13:15:20,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 489 transitions, 6900 flow [2024-06-14 13:15:20,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:15:20,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:15:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-14 13:15:20,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763213530655391 [2024-06-14 13:15:20,330 INFO L175 Difference]: Start difference. First operand has 359 places, 452 transitions, 5558 flow. Second operand 11 states and 178 transitions. [2024-06-14 13:15:20,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 489 transitions, 6900 flow [2024-06-14 13:15:22,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 489 transitions, 6663 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:22,545 INFO L231 Difference]: Finished difference. Result has 364 places, 461 transitions, 5699 flow [2024-06-14 13:15:22,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5321, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5699, PETRI_PLACES=364, PETRI_TRANSITIONS=461} [2024-06-14 13:15:22,546 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-14 13:15:22,546 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 461 transitions, 5699 flow [2024-06-14 13:15:22,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:22,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:22,546 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 13:15:22,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:15:22,547 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:22,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:22,547 INFO L85 PathProgramCache]: Analyzing trace with hash -893295672, now seen corresponding path program 2 times [2024-06-14 13:15:22,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:22,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850032799] [2024-06-14 13:15:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:22,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:25,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:25,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850032799] [2024-06-14 13:15:25,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850032799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:25,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:25,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:25,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806823783] [2024-06-14 13:15:25,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:25,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:25,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:25,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:25,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:25,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:25,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 461 transitions, 5699 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:25,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:25,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:25,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:28,560 INFO L124 PetriNetUnfolderBase]: 3027/4975 cut-off events. [2024-06-14 13:15:28,560 INFO L125 PetriNetUnfolderBase]: For 468760/468768 co-relation queries the response was YES. [2024-06-14 13:15:28,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36652 conditions, 4975 events. 3027/4975 cut-off events. For 468760/468768 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 31004 event pairs, 600 based on Foata normal form. 10/4985 useless extension candidates. Maximal degree in co-relation 36494. Up to 4500 conditions per place. [2024-06-14 13:15:28,621 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 411 selfloop transitions, 88 changer transitions 0/504 dead transitions. [2024-06-14 13:15:28,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 504 transitions, 7031 flow [2024-06-14 13:15:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:15:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:15:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 204 transitions. [2024-06-14 13:15:28,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36493738819320215 [2024-06-14 13:15:28,623 INFO L175 Difference]: Start difference. First operand has 364 places, 461 transitions, 5699 flow. Second operand 13 states and 204 transitions. [2024-06-14 13:15:28,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 504 transitions, 7031 flow [2024-06-14 13:15:30,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 504 transitions, 6810 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:30,358 INFO L231 Difference]: Finished difference. Result has 371 places, 467 transitions, 5722 flow [2024-06-14 13:15:30,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5478, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5722, PETRI_PLACES=371, PETRI_TRANSITIONS=467} [2024-06-14 13:15:30,358 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-14 13:15:30,358 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 467 transitions, 5722 flow [2024-06-14 13:15:30,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:30,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:30,359 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 13:15:30,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:15:30,359 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:30,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:30,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1595070762, now seen corresponding path program 5 times [2024-06-14 13:15:30,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:30,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052875827] [2024-06-14 13:15:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:30,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:33,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:33,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052875827] [2024-06-14 13:15:33,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052875827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:33,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:33,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:33,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21737916] [2024-06-14 13:15:33,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:33,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:33,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:33,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:33,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:33,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:33,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 467 transitions, 5722 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:33,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:33,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:33,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:35,267 INFO L124 PetriNetUnfolderBase]: 3053/5016 cut-off events. [2024-06-14 13:15:35,267 INFO L125 PetriNetUnfolderBase]: For 486630/486634 co-relation queries the response was YES. [2024-06-14 13:15:35,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37145 conditions, 5016 events. 3053/5016 cut-off events. For 486630/486634 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 31329 event pairs, 601 based on Foata normal form. 4/5020 useless extension candidates. Maximal degree in co-relation 36986. Up to 4261 conditions per place. [2024-06-14 13:15:35,339 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 345 selfloop transitions, 157 changer transitions 0/507 dead transitions. [2024-06-14 13:15:35,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 507 transitions, 7428 flow [2024-06-14 13:15:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:15:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:15:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-14 13:15:35,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:15:35,341 INFO L175 Difference]: Start difference. First operand has 371 places, 467 transitions, 5722 flow. Second operand 11 states and 187 transitions. [2024-06-14 13:15:35,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 507 transitions, 7428 flow [2024-06-14 13:15:37,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 507 transitions, 7306 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 13:15:37,369 INFO L231 Difference]: Finished difference. Result has 373 places, 473 transitions, 5996 flow [2024-06-14 13:15:37,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5600, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5996, PETRI_PLACES=373, PETRI_TRANSITIONS=473} [2024-06-14 13:15:37,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-14 13:15:37,370 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 473 transitions, 5996 flow [2024-06-14 13:15:37,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:37,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:37,371 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 13:15:37,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:15:37,371 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:37,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1595081922, now seen corresponding path program 6 times [2024-06-14 13:15:37,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:37,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285161059] [2024-06-14 13:15:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:37,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:40,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:40,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285161059] [2024-06-14 13:15:40,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285161059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:40,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:40,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:40,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260773277] [2024-06-14 13:15:40,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:40,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:40,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:40,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:40,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:40,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:40,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 473 transitions, 5996 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:40,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:40,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:40,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:42,625 INFO L124 PetriNetUnfolderBase]: 3047/5004 cut-off events. [2024-06-14 13:15:42,625 INFO L125 PetriNetUnfolderBase]: For 489387/489391 co-relation queries the response was YES. [2024-06-14 13:15:42,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37430 conditions, 5004 events. 3047/5004 cut-off events. For 489387/489391 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 31197 event pairs, 601 based on Foata normal form. 4/5008 useless extension candidates. Maximal degree in co-relation 37269. Up to 4256 conditions per place. [2024-06-14 13:15:42,698 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 346 selfloop transitions, 158 changer transitions 0/509 dead transitions. [2024-06-14 13:15:42,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 509 transitions, 7458 flow [2024-06-14 13:15:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:15:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:15:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 211 transitions. [2024-06-14 13:15:42,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774597495527728 [2024-06-14 13:15:42,699 INFO L175 Difference]: Start difference. First operand has 373 places, 473 transitions, 5996 flow. Second operand 13 states and 211 transitions. [2024-06-14 13:15:42,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 509 transitions, 7458 flow [2024-06-14 13:15:44,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 509 transitions, 7145 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:44,642 INFO L231 Difference]: Finished difference. Result has 379 places, 473 transitions, 6005 flow [2024-06-14 13:15:44,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6005, PETRI_PLACES=379, PETRI_TRANSITIONS=473} [2024-06-14 13:15:44,642 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-14 13:15:44,643 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 473 transitions, 6005 flow [2024-06-14 13:15:44,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:44,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:44,643 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 13:15:44,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:15:44,643 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:44,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:44,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1577610354, now seen corresponding path program 9 times [2024-06-14 13:15:44,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:44,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207721780] [2024-06-14 13:15:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:44,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:47,959 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 13:15:47,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:47,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207721780] [2024-06-14 13:15:47,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207721780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:47,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:47,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:47,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110926228] [2024-06-14 13:15:47,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:47,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:47,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:48,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:48,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 473 transitions, 6005 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:48,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:48,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:48,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:49,964 INFO L124 PetriNetUnfolderBase]: 3044/5010 cut-off events. [2024-06-14 13:15:49,965 INFO L125 PetriNetUnfolderBase]: For 490420/490424 co-relation queries the response was YES. [2024-06-14 13:15:50,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37393 conditions, 5010 events. 3044/5010 cut-off events. For 490420/490424 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 31326 event pairs, 624 based on Foata normal form. 3/5013 useless extension candidates. Maximal degree in co-relation 37231. Up to 4442 conditions per place. [2024-06-14 13:15:50,032 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 378 selfloop transitions, 115 changer transitions 0/498 dead transitions. [2024-06-14 13:15:50,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 498 transitions, 7059 flow [2024-06-14 13:15:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:50,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:15:50,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 13:15:50,033 INFO L175 Difference]: Start difference. First operand has 379 places, 473 transitions, 6005 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:15:50,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 498 transitions, 7059 flow [2024-06-14 13:15:51,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 498 transitions, 6704 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-14 13:15:51,686 INFO L231 Difference]: Finished difference. Result has 376 places, 473 transitions, 5886 flow [2024-06-14 13:15:51,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5886, PETRI_PLACES=376, PETRI_TRANSITIONS=473} [2024-06-14 13:15:51,686 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-14 13:15:51,687 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 473 transitions, 5886 flow [2024-06-14 13:15:51,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:51,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:51,687 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 13:15:51,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:15:51,687 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:51,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:51,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1595076156, now seen corresponding path program 3 times [2024-06-14 13:15:51,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:51,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590834107] [2024-06-14 13:15:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:51,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:55,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:55,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590834107] [2024-06-14 13:15:55,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590834107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:55,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:55,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:55,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792802385] [2024-06-14 13:15:55,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:55,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:55,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:55,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:55,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:55,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:15:55,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 473 transitions, 5886 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:55,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:55,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:15:55,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:57,210 INFO L124 PetriNetUnfolderBase]: 3038/4991 cut-off events. [2024-06-14 13:15:57,211 INFO L125 PetriNetUnfolderBase]: For 495244/495252 co-relation queries the response was YES. [2024-06-14 13:15:57,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37064 conditions, 4991 events. 3038/4991 cut-off events. For 495244/495252 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 31149 event pairs, 599 based on Foata normal form. 10/5001 useless extension candidates. Maximal degree in co-relation 36901. Up to 4519 conditions per place. [2024-06-14 13:15:57,283 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 415 selfloop transitions, 88 changer transitions 0/508 dead transitions. [2024-06-14 13:15:57,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 508 transitions, 6988 flow [2024-06-14 13:15:57,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:15:57,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:15:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-06-14 13:15:57,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:15:57,285 INFO L175 Difference]: Start difference. First operand has 376 places, 473 transitions, 5886 flow. Second operand 12 states and 192 transitions. [2024-06-14 13:15:57,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 508 transitions, 6988 flow [2024-06-14 13:15:59,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 508 transitions, 6742 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:59,115 INFO L231 Difference]: Finished difference. Result has 380 places, 473 transitions, 5822 flow [2024-06-14 13:15:59,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5640, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5822, PETRI_PLACES=380, PETRI_TRANSITIONS=473} [2024-06-14 13:15:59,116 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-14 13:15:59,116 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 473 transitions, 5822 flow [2024-06-14 13:15:59,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:59,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:59,116 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 13:15:59,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:15:59,117 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:59,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:59,117 INFO L85 PathProgramCache]: Analyzing trace with hash -381500530, now seen corresponding path program 10 times [2024-06-14 13:15:59,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:59,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539153791] [2024-06-14 13:15:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:59,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:02,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:02,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539153791] [2024-06-14 13:16:02,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539153791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:02,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:02,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:02,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895088178] [2024-06-14 13:16:02,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:02,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:02,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:02,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:02,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:02,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:02,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 473 transitions, 5822 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:02,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:02,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:02,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:04,941 INFO L124 PetriNetUnfolderBase]: 3082/5068 cut-off events. [2024-06-14 13:16:04,941 INFO L125 PetriNetUnfolderBase]: For 514533/514537 co-relation queries the response was YES. [2024-06-14 13:16:04,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37920 conditions, 5068 events. 3082/5068 cut-off events. For 514533/514537 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31733 event pairs, 619 based on Foata normal form. 3/5071 useless extension candidates. Maximal degree in co-relation 37756. Up to 4462 conditions per place. [2024-06-14 13:16:05,007 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 373 selfloop transitions, 140 changer transitions 0/518 dead transitions. [2024-06-14 13:16:05,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 518 transitions, 7626 flow [2024-06-14 13:16:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:16:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:16:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 13:16:05,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813953488372093 [2024-06-14 13:16:05,009 INFO L175 Difference]: Start difference. First operand has 380 places, 473 transitions, 5822 flow. Second operand 10 states and 164 transitions. [2024-06-14 13:16:05,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 518 transitions, 7626 flow [2024-06-14 13:16:06,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 518 transitions, 7450 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 13:16:06,906 INFO L231 Difference]: Finished difference. Result has 381 places, 494 transitions, 6340 flow [2024-06-14 13:16:06,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5646, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6340, PETRI_PLACES=381, PETRI_TRANSITIONS=494} [2024-06-14 13:16:06,907 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-14 13:16:06,907 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 494 transitions, 6340 flow [2024-06-14 13:16:06,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:06,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:06,907 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, 1, 1] [2024-06-14 13:16:06,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:16:06,907 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:06,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash -749410722, now seen corresponding path program 4 times [2024-06-14 13:16:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:06,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356189997] [2024-06-14 13:16:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:06,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:10,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:10,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356189997] [2024-06-14 13:16:10,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356189997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:10,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:10,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:10,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802234530] [2024-06-14 13:16:10,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:10,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:10,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:10,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:10,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:10,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:10,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 494 transitions, 6340 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:10,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:10,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:10,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:12,487 INFO L124 PetriNetUnfolderBase]: 3124/5130 cut-off events. [2024-06-14 13:16:12,500 INFO L125 PetriNetUnfolderBase]: For 547825/547833 co-relation queries the response was YES. [2024-06-14 13:16:12,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38933 conditions, 5130 events. 3124/5130 cut-off events. For 547825/547833 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 32170 event pairs, 600 based on Foata normal form. 10/5140 useless extension candidates. Maximal degree in co-relation 38766. Up to 4598 conditions per place. [2024-06-14 13:16:12,578 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 434 selfloop transitions, 99 changer transitions 0/538 dead transitions. [2024-06-14 13:16:12,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 538 transitions, 7984 flow [2024-06-14 13:16:12,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:16:12,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:16:12,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 205 transitions. [2024-06-14 13:16:12,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667262969588551 [2024-06-14 13:16:12,580 INFO L175 Difference]: Start difference. First operand has 381 places, 494 transitions, 6340 flow. Second operand 13 states and 205 transitions. [2024-06-14 13:16:12,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 538 transitions, 7984 flow [2024-06-14 13:16:14,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 538 transitions, 7786 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-14 13:16:14,780 INFO L231 Difference]: Finished difference. Result has 392 places, 503 transitions, 6481 flow [2024-06-14 13:16:14,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6142, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6481, PETRI_PLACES=392, PETRI_TRANSITIONS=503} [2024-06-14 13:16:14,781 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-14 13:16:14,781 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 503 transitions, 6481 flow [2024-06-14 13:16:14,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:14,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:14,781 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 13:16:14,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:16:14,782 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:14,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:14,782 INFO L85 PathProgramCache]: Analyzing trace with hash -391609102, now seen corresponding path program 5 times [2024-06-14 13:16:14,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:14,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821356633] [2024-06-14 13:16:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:14,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:18,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:18,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821356633] [2024-06-14 13:16:18,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821356633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:18,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:18,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:18,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460846917] [2024-06-14 13:16:18,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:18,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:18,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:18,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:18,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:18,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 503 transitions, 6481 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:18,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:18,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:18,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:20,567 INFO L124 PetriNetUnfolderBase]: 3134/5146 cut-off events. [2024-06-14 13:16:20,567 INFO L125 PetriNetUnfolderBase]: For 558751/558759 co-relation queries the response was YES. [2024-06-14 13:16:20,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39153 conditions, 5146 events. 3134/5146 cut-off events. For 558751/558759 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 32250 event pairs, 600 based on Foata normal form. 10/5156 useless extension candidates. Maximal degree in co-relation 38984. Up to 4608 conditions per place. [2024-06-14 13:16:20,640 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 431 selfloop transitions, 102 changer transitions 0/538 dead transitions. [2024-06-14 13:16:20,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 538 transitions, 7865 flow [2024-06-14 13:16:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:16:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:16:20,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-14 13:16:20,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-14 13:16:20,642 INFO L175 Difference]: Start difference. First operand has 392 places, 503 transitions, 6481 flow. Second operand 12 states and 189 transitions. [2024-06-14 13:16:20,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 538 transitions, 7865 flow [2024-06-14 13:16:22,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 538 transitions, 7655 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-14 13:16:22,330 INFO L231 Difference]: Finished difference. Result has 395 places, 506 transitions, 6521 flow [2024-06-14 13:16:22,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6277, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6521, PETRI_PLACES=395, PETRI_TRANSITIONS=506} [2024-06-14 13:16:22,331 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-14 13:16:22,331 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 506 transitions, 6521 flow [2024-06-14 13:16:22,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:22,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:22,331 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 13:16:22,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:16:22,331 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:22,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:22,332 INFO L85 PathProgramCache]: Analyzing trace with hash -402454018, now seen corresponding path program 7 times [2024-06-14 13:16:22,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:22,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627657847] [2024-06-14 13:16:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:22,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:26,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:26,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627657847] [2024-06-14 13:16:26,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627657847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:26,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:26,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:26,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588744775] [2024-06-14 13:16:26,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:26,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:26,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:26,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:26,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:26,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:26,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 506 transitions, 6521 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:26,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:26,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:26,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:29,079 INFO L124 PetriNetUnfolderBase]: 3186/5222 cut-off events. [2024-06-14 13:16:29,079 INFO L125 PetriNetUnfolderBase]: For 589062/589064 co-relation queries the response was YES. [2024-06-14 13:16:29,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40121 conditions, 5222 events. 3186/5222 cut-off events. For 589062/589064 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 32796 event pairs, 601 based on Foata normal form. 2/5224 useless extension candidates. Maximal degree in co-relation 39951. Up to 4727 conditions per place. [2024-06-14 13:16:29,151 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 473 selfloop transitions, 75 changer transitions 0/553 dead transitions. [2024-06-14 13:16:29,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 553 transitions, 8274 flow [2024-06-14 13:16:29,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:16:29,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:16:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 216 transitions. [2024-06-14 13:16:29,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588039867109635 [2024-06-14 13:16:29,152 INFO L175 Difference]: Start difference. First operand has 395 places, 506 transitions, 6521 flow. Second operand 14 states and 216 transitions. [2024-06-14 13:16:29,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 553 transitions, 8274 flow [2024-06-14 13:16:31,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 553 transitions, 8079 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 13:16:31,649 INFO L231 Difference]: Finished difference. Result has 400 places, 518 transitions, 6673 flow [2024-06-14 13:16:31,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6326, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6673, PETRI_PLACES=400, PETRI_TRANSITIONS=518} [2024-06-14 13:16:31,649 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-14 13:16:31,649 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 518 transitions, 6673 flow [2024-06-14 13:16:31,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:31,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:31,650 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 13:16:31,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:16:31,650 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:31,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:31,650 INFO L85 PathProgramCache]: Analyzing trace with hash -391609288, now seen corresponding path program 8 times [2024-06-14 13:16:31,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:31,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433997163] [2024-06-14 13:16:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:31,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:35,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:35,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:35,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433997163] [2024-06-14 13:16:35,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433997163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:35,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:35,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:35,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814989321] [2024-06-14 13:16:35,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:35,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:35,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:35,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:35,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:35,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:35,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 518 transitions, 6673 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:35,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:35,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:35,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:37,214 INFO L124 PetriNetUnfolderBase]: 3228/5282 cut-off events. [2024-06-14 13:16:37,214 INFO L125 PetriNetUnfolderBase]: For 621169/621173 co-relation queries the response was YES. [2024-06-14 13:16:37,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40959 conditions, 5282 events. 3228/5282 cut-off events. For 621169/621173 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33151 event pairs, 614 based on Foata normal form. 4/5286 useless extension candidates. Maximal degree in co-relation 40788. Up to 4454 conditions per place. [2024-06-14 13:16:37,327 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 376 selfloop transitions, 175 changer transitions 0/556 dead transitions. [2024-06-14 13:16:37,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 556 transitions, 8569 flow [2024-06-14 13:16:37,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:16:37,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:16:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 13:16:37,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39767441860465114 [2024-06-14 13:16:37,329 INFO L175 Difference]: Start difference. First operand has 400 places, 518 transitions, 6673 flow. Second operand 10 states and 171 transitions. [2024-06-14 13:16:37,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 556 transitions, 8569 flow [2024-06-14 13:16:40,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 556 transitions, 8466 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 13:16:40,378 INFO L231 Difference]: Finished difference. Result has 402 places, 527 transitions, 7060 flow [2024-06-14 13:16:40,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6570, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7060, PETRI_PLACES=402, PETRI_TRANSITIONS=527} [2024-06-14 13:16:40,379 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-14 13:16:40,379 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 527 transitions, 7060 flow [2024-06-14 13:16:40,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:40,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:40,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:40,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:16:40,380 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:40,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:40,380 INFO L85 PathProgramCache]: Analyzing trace with hash -398960752, now seen corresponding path program 6 times [2024-06-14 13:16:40,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:40,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755419397] [2024-06-14 13:16:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:40,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:44,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:44,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755419397] [2024-06-14 13:16:44,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755419397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:44,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:44,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:44,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146797628] [2024-06-14 13:16:44,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:44,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:44,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:44,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:44,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:44,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:44,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 527 transitions, 7060 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:44,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:44,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:44,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:47,028 INFO L124 PetriNetUnfolderBase]: 3222/5272 cut-off events. [2024-06-14 13:16:47,028 INFO L125 PetriNetUnfolderBase]: For 624088/624096 co-relation queries the response was YES. [2024-06-14 13:16:47,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41313 conditions, 5272 events. 3222/5272 cut-off events. For 624088/624096 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33066 event pairs, 606 based on Foata normal form. 10/5282 useless extension candidates. Maximal degree in co-relation 41140. Up to 4733 conditions per place. [2024-06-14 13:16:47,098 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 458 selfloop transitions, 102 changer transitions 0/565 dead transitions. [2024-06-14 13:16:47,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 565 transitions, 8476 flow [2024-06-14 13:16:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:16:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:16:47,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 230 transitions. [2024-06-14 13:16:47,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35658914728682173 [2024-06-14 13:16:47,100 INFO L175 Difference]: Start difference. First operand has 402 places, 527 transitions, 7060 flow. Second operand 15 states and 230 transitions. [2024-06-14 13:16:47,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 565 transitions, 8476 flow [2024-06-14 13:16:49,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 565 transitions, 8193 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:16:49,729 INFO L231 Difference]: Finished difference. Result has 412 places, 527 transitions, 6987 flow [2024-06-14 13:16:49,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6777, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6987, PETRI_PLACES=412, PETRI_TRANSITIONS=527} [2024-06-14 13:16:49,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-14 13:16:49,730 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 527 transitions, 6987 flow [2024-06-14 13:16:49,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:49,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:49,731 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 13:16:49,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:16:49,731 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:49,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:49,731 INFO L85 PathProgramCache]: Analyzing trace with hash -391613938, now seen corresponding path program 9 times [2024-06-14 13:16:49,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:49,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379252660] [2024-06-14 13:16:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:49,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:53,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:53,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379252660] [2024-06-14 13:16:53,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379252660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:53,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:53,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:16:53,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823952569] [2024-06-14 13:16:53,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:53,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:16:53,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:53,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:16:53,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:16:53,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:16:53,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 527 transitions, 6987 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:53,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:53,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:16:53,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:55,867 INFO L124 PetriNetUnfolderBase]: 3216/5272 cut-off events. [2024-06-14 13:16:55,868 INFO L125 PetriNetUnfolderBase]: For 625339/625341 co-relation queries the response was YES. [2024-06-14 13:16:55,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40950 conditions, 5272 events. 3216/5272 cut-off events. For 625339/625341 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 33215 event pairs, 606 based on Foata normal form. 2/5274 useless extension candidates. Maximal degree in co-relation 40776. Up to 4797 conditions per place. [2024-06-14 13:16:55,949 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 487 selfloop transitions, 61 changer transitions 0/553 dead transitions. [2024-06-14 13:16:55,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 553 transitions, 8149 flow [2024-06-14 13:16:55,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:16:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:16:55,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 13:16:55,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-14 13:16:55,951 INFO L175 Difference]: Start difference. First operand has 412 places, 527 transitions, 6987 flow. Second operand 10 states and 162 transitions. [2024-06-14 13:16:55,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 553 transitions, 8149 flow [2024-06-14 13:16:58,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 553 transitions, 7911 flow, removed 13 selfloop flow, removed 14 redundant places. [2024-06-14 13:16:58,226 INFO L231 Difference]: Finished difference. Result has 408 places, 527 transitions, 6877 flow [2024-06-14 13:16:58,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6877, PETRI_PLACES=408, PETRI_TRANSITIONS=527} [2024-06-14 13:16:58,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-14 13:16:58,227 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 527 transitions, 6877 flow [2024-06-14 13:16:58,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:58,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:58,228 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 13:16:58,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:16:58,228 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:58,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash -402691168, now seen corresponding path program 10 times [2024-06-14 13:16:58,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:58,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023146365] [2024-06-14 13:16:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:58,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:58,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:01,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:01,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023146365] [2024-06-14 13:17:01,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023146365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:01,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:01,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:01,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366720241] [2024-06-14 13:17:01,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:01,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:01,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:01,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:01,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:01,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:01,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 527 transitions, 6877 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:01,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:01,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:01,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:03,472 INFO L124 PetriNetUnfolderBase]: 3210/5268 cut-off events. [2024-06-14 13:17:03,473 INFO L125 PetriNetUnfolderBase]: For 626497/626499 co-relation queries the response was YES. [2024-06-14 13:17:03,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40656 conditions, 5268 events. 3210/5268 cut-off events. For 626497/626499 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33204 event pairs, 607 based on Foata normal form. 2/5270 useless extension candidates. Maximal degree in co-relation 40481. Up to 4767 conditions per place. [2024-06-14 13:17:03,585 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 476 selfloop transitions, 75 changer transitions 0/556 dead transitions. [2024-06-14 13:17:03,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 556 transitions, 8051 flow [2024-06-14 13:17:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:17:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:17:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-14 13:17:03,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-14 13:17:03,602 INFO L175 Difference]: Start difference. First operand has 408 places, 527 transitions, 6877 flow. Second operand 12 states and 188 transitions. [2024-06-14 13:17:03,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 556 transitions, 8051 flow [2024-06-14 13:17:06,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 556 transitions, 7891 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 13:17:06,383 INFO L231 Difference]: Finished difference. Result has 411 places, 527 transitions, 6874 flow [2024-06-14 13:17:06,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6717, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6874, PETRI_PLACES=411, PETRI_TRANSITIONS=527} [2024-06-14 13:17:06,384 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 367 predicate places. [2024-06-14 13:17:06,384 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 527 transitions, 6874 flow [2024-06-14 13:17:06,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:06,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:06,384 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 13:17:06,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:17:06,384 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:06,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:06,385 INFO L85 PathProgramCache]: Analyzing trace with hash -402691354, now seen corresponding path program 11 times [2024-06-14 13:17:06,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:06,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648172285] [2024-06-14 13:17:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:06,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:09,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:09,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648172285] [2024-06-14 13:17:09,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648172285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:09,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:09,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:09,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775226819] [2024-06-14 13:17:09,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:09,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:09,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:09,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:09,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:09,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:09,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 527 transitions, 6874 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:09,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:09,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:09,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:11,816 INFO L124 PetriNetUnfolderBase]: 3207/5264 cut-off events. [2024-06-14 13:17:11,817 INFO L125 PetriNetUnfolderBase]: For 626676/626678 co-relation queries the response was YES. [2024-06-14 13:17:11,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40618 conditions, 5264 events. 3207/5264 cut-off events. For 626676/626678 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 33196 event pairs, 627 based on Foata normal form. 1/5265 useless extension candidates. Maximal degree in co-relation 40442. Up to 4832 conditions per place. [2024-06-14 13:17:11,895 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 491 selfloop transitions, 52 changer transitions 0/548 dead transitions. [2024-06-14 13:17:11,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 548 transitions, 8016 flow [2024-06-14 13:17:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:11,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:11,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:17:11,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:17:11,897 INFO L175 Difference]: Start difference. First operand has 411 places, 527 transitions, 6874 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:17:11,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 548 transitions, 8016 flow [2024-06-14 13:17:14,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 548 transitions, 7866 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 13:17:14,618 INFO L231 Difference]: Finished difference. Result has 409 places, 527 transitions, 6835 flow [2024-06-14 13:17:14,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6724, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6835, PETRI_PLACES=409, PETRI_TRANSITIONS=527} [2024-06-14 13:17:14,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-14 13:17:14,619 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 527 transitions, 6835 flow [2024-06-14 13:17:14,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:14,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:14,619 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 13:17:14,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:17:14,620 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:14,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:14,620 INFO L85 PathProgramCache]: Analyzing trace with hash -381494764, now seen corresponding path program 11 times [2024-06-14 13:17:14,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:14,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240993450] [2024-06-14 13:17:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:14,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:18,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:18,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240993450] [2024-06-14 13:17:18,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240993450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:18,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:18,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:18,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799973198] [2024-06-14 13:17:18,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:18,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:18,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:18,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:18,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:18,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:18,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 527 transitions, 6835 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:18,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:18,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:18,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:20,205 INFO L124 PetriNetUnfolderBase]: 3217/5270 cut-off events. [2024-06-14 13:17:20,206 INFO L125 PetriNetUnfolderBase]: For 645063/645067 co-relation queries the response was YES. [2024-06-14 13:17:20,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40735 conditions, 5270 events. 3217/5270 cut-off events. For 645063/645067 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 33184 event pairs, 608 based on Foata normal form. 4/5274 useless extension candidates. Maximal degree in co-relation 40558. Up to 4442 conditions per place. [2024-06-14 13:17:20,297 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 372 selfloop transitions, 185 changer transitions 0/562 dead transitions. [2024-06-14 13:17:20,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 562 transitions, 8689 flow [2024-06-14 13:17:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:17:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:17:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 198 transitions. [2024-06-14 13:17:20,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-14 13:17:20,299 INFO L175 Difference]: Start difference. First operand has 409 places, 527 transitions, 6835 flow. Second operand 12 states and 198 transitions. [2024-06-14 13:17:20,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 562 transitions, 8689 flow [2024-06-14 13:17:23,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 562 transitions, 8548 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:23,440 INFO L231 Difference]: Finished difference. Result has 414 places, 530 transitions, 7114 flow [2024-06-14 13:17:23,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6694, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7114, PETRI_PLACES=414, PETRI_TRANSITIONS=530} [2024-06-14 13:17:23,441 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-14 13:17:23,441 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 530 transitions, 7114 flow [2024-06-14 13:17:23,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:23,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:23,441 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 13:17:23,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:17:23,443 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:23,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:23,444 INFO L85 PathProgramCache]: Analyzing trace with hash -381506110, now seen corresponding path program 12 times [2024-06-14 13:17:23,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:23,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475747475] [2024-06-14 13:17:23,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:23,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:26,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:26,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475747475] [2024-06-14 13:17:26,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475747475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:26,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:26,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:26,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618796889] [2024-06-14 13:17:26,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:26,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:26,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:26,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:26,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:26,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:26,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 530 transitions, 7114 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:26,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:26,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:26,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:29,050 INFO L124 PetriNetUnfolderBase]: 3214/5268 cut-off events. [2024-06-14 13:17:29,050 INFO L125 PetriNetUnfolderBase]: For 646711/646715 co-relation queries the response was YES. [2024-06-14 13:17:29,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41100 conditions, 5268 events. 3214/5268 cut-off events. For 646711/646715 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 33157 event pairs, 634 based on Foata normal form. 3/5271 useless extension candidates. Maximal degree in co-relation 40922. Up to 4648 conditions per place. [2024-06-14 13:17:29,145 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 409 selfloop transitions, 141 changer transitions 0/555 dead transitions. [2024-06-14 13:17:29,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 555 transitions, 8486 flow [2024-06-14 13:17:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:17:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:17:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 187 transitions. [2024-06-14 13:17:29,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3624031007751938 [2024-06-14 13:17:29,150 INFO L175 Difference]: Start difference. First operand has 414 places, 530 transitions, 7114 flow. Second operand 12 states and 187 transitions. [2024-06-14 13:17:29,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 555 transitions, 8486 flow [2024-06-14 13:17:32,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 555 transitions, 8054 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-06-14 13:17:32,243 INFO L231 Difference]: Finished difference. Result has 417 places, 530 transitions, 6970 flow [2024-06-14 13:17:32,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6682, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6970, PETRI_PLACES=417, PETRI_TRANSITIONS=530} [2024-06-14 13:17:32,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-14 13:17:32,253 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 530 transitions, 6970 flow [2024-06-14 13:17:32,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:32,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:32,254 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 13:17:32,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:17:32,255 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:32,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:32,256 INFO L85 PathProgramCache]: Analyzing trace with hash -381505924, now seen corresponding path program 12 times [2024-06-14 13:17:32,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:32,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169330089] [2024-06-14 13:17:32,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:32,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:35,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:35,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169330089] [2024-06-14 13:17:35,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169330089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:35,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:35,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:35,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320540098] [2024-06-14 13:17:35,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:35,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:35,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:35,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:35,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:36,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:36,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 530 transitions, 6970 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:36,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:36,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:36,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:38,479 INFO L124 PetriNetUnfolderBase]: 3208/5256 cut-off events. [2024-06-14 13:17:38,479 INFO L125 PetriNetUnfolderBase]: For 652107/652111 co-relation queries the response was YES. [2024-06-14 13:17:38,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40669 conditions, 5256 events. 3208/5256 cut-off events. For 652107/652111 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 33045 event pairs, 607 based on Foata normal form. 4/5260 useless extension candidates. Maximal degree in co-relation 40490. Up to 4433 conditions per place. [2024-06-14 13:17:38,555 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 370 selfloop transitions, 187 changer transitions 0/562 dead transitions. [2024-06-14 13:17:38,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 562 transitions, 8582 flow [2024-06-14 13:17:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:17:38,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:17:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 208 transitions. [2024-06-14 13:17:38,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 13:17:38,558 INFO L175 Difference]: Start difference. First operand has 417 places, 530 transitions, 6970 flow. Second operand 13 states and 208 transitions. [2024-06-14 13:17:38,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 562 transitions, 8582 flow [2024-06-14 13:17:42,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 562 transitions, 8240 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-14 13:17:42,389 INFO L231 Difference]: Finished difference. Result has 419 places, 530 transitions, 7008 flow [2024-06-14 13:17:42,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6628, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7008, PETRI_PLACES=419, PETRI_TRANSITIONS=530} [2024-06-14 13:17:42,390 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-14 13:17:42,390 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 530 transitions, 7008 flow [2024-06-14 13:17:42,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:42,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:42,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:42,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:17:42,390 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:42,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:42,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1325726306, now seen corresponding path program 4 times [2024-06-14 13:17:42,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:42,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516844491] [2024-06-14 13:17:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:42,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:45,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:45,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516844491] [2024-06-14 13:17:45,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516844491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:45,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:45,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:45,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923579880] [2024-06-14 13:17:45,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:45,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:45,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:45,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:45,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:45,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:45,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 530 transitions, 7008 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:45,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:45,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:45,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:47,682 INFO L124 PetriNetUnfolderBase]: 3190/5235 cut-off events. [2024-06-14 13:17:47,682 INFO L125 PetriNetUnfolderBase]: For 652231/652237 co-relation queries the response was YES. [2024-06-14 13:17:47,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39911 conditions, 5235 events. 3190/5235 cut-off events. For 652231/652237 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 32857 event pairs, 467 based on Foata normal form. 14/5249 useless extension candidates. Maximal degree in co-relation 39731. Up to 4423 conditions per place. [2024-06-14 13:17:47,760 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 493 selfloop transitions, 78 changer transitions 0/576 dead transitions. [2024-06-14 13:17:47,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 576 transitions, 8330 flow [2024-06-14 13:17:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:17:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:17:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:17:47,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-14 13:17:47,762 INFO L175 Difference]: Start difference. First operand has 419 places, 530 transitions, 7008 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:17:47,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 576 transitions, 8330 flow [2024-06-14 13:17:50,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 576 transitions, 7932 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-14 13:17:50,431 INFO L231 Difference]: Finished difference. Result has 417 places, 530 transitions, 6776 flow [2024-06-14 13:17:50,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6610, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6776, PETRI_PLACES=417, PETRI_TRANSITIONS=530} [2024-06-14 13:17:50,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-14 13:17:50,432 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 530 transitions, 6776 flow [2024-06-14 13:17:50,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:50,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:50,432 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 13:17:50,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:17:50,432 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:50,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:50,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1106178704, now seen corresponding path program 13 times [2024-06-14 13:17:50,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:50,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281260985] [2024-06-14 13:17:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:50,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:53,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:53,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281260985] [2024-06-14 13:17:53,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281260985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:53,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:53,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:17:53,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555527619] [2024-06-14 13:17:53,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:53,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:17:53,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:53,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:17:53,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:17:53,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:17:53,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 530 transitions, 6776 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:53,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:53,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:17:53,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:55,981 INFO L124 PetriNetUnfolderBase]: 3219/5278 cut-off events. [2024-06-14 13:17:55,981 INFO L125 PetriNetUnfolderBase]: For 641541/641547 co-relation queries the response was YES. [2024-06-14 13:17:56,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40543 conditions, 5278 events. 3219/5278 cut-off events. For 641541/641547 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 33205 event pairs, 637 based on Foata normal form. 2/5279 useless extension candidates. Maximal degree in co-relation 40362. Up to 4447 conditions per place. [2024-06-14 13:17:56,066 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 367 selfloop transitions, 204 changer transitions 0/576 dead transitions. [2024-06-14 13:17:56,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 576 transitions, 9136 flow [2024-06-14 13:17:56,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:56,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:17:56,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 13:17:56,068 INFO L175 Difference]: Start difference. First operand has 417 places, 530 transitions, 6776 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:17:56,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 576 transitions, 9136 flow [2024-06-14 13:17:59,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 576 transitions, 8979 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 13:17:59,315 INFO L231 Difference]: Finished difference. Result has 418 places, 542 transitions, 7327 flow [2024-06-14 13:17:59,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6643, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7327, PETRI_PLACES=418, PETRI_TRANSITIONS=542} [2024-06-14 13:17:59,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-14 13:17:59,316 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 542 transitions, 7327 flow [2024-06-14 13:17:59,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:59,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:59,316 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 13:17:59,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:17:59,316 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:17:59,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:59,317 INFO L85 PathProgramCache]: Analyzing trace with hash 690789184, now seen corresponding path program 14 times [2024-06-14 13:17:59,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:59,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212807649] [2024-06-14 13:17:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:59,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:02,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:02,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212807649] [2024-06-14 13:18:02,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212807649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:02,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:02,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:02,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389354307] [2024-06-14 13:18:02,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:02,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:02,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:02,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:02,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:02,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:02,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 542 transitions, 7327 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:02,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:02,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:02,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:04,877 INFO L124 PetriNetUnfolderBase]: 3224/5291 cut-off events. [2024-06-14 13:18:04,878 INFO L125 PetriNetUnfolderBase]: For 620582/620588 co-relation queries the response was YES. [2024-06-14 13:18:04,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40641 conditions, 5291 events. 3224/5291 cut-off events. For 620582/620588 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 33391 event pairs, 639 based on Foata normal form. 2/5292 useless extension candidates. Maximal degree in co-relation 40460. Up to 4453 conditions per place. [2024-06-14 13:18:04,961 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 347 selfloop transitions, 225 changer transitions 0/577 dead transitions. [2024-06-14 13:18:04,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 577 transitions, 9057 flow [2024-06-14 13:18:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:04,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 13:18:04,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 13:18:04,963 INFO L175 Difference]: Start difference. First operand has 418 places, 542 transitions, 7327 flow. Second operand 9 states and 161 transitions. [2024-06-14 13:18:04,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 577 transitions, 9057 flow [2024-06-14 13:18:07,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 577 transitions, 8421 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-14 13:18:07,857 INFO L231 Difference]: Finished difference. Result has 421 places, 545 transitions, 7225 flow [2024-06-14 13:18:07,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6715, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7225, PETRI_PLACES=421, PETRI_TRANSITIONS=545} [2024-06-14 13:18:07,858 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 377 predicate places. [2024-06-14 13:18:07,858 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 545 transitions, 7225 flow [2024-06-14 13:18:07,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:07,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:07,858 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 13:18:07,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:18:07,858 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:07,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:07,859 INFO L85 PathProgramCache]: Analyzing trace with hash 691088086, now seen corresponding path program 7 times [2024-06-14 13:18:07,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:07,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868230708] [2024-06-14 13:18:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:07,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:11,042 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 13:18:11,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:11,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868230708] [2024-06-14 13:18:11,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868230708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:11,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:11,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:11,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919931548] [2024-06-14 13:18:11,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:11,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:11,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:11,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:11,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:11,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:11,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 545 transitions, 7225 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:11,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:11,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:11,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:13,213 INFO L124 PetriNetUnfolderBase]: 3250/5334 cut-off events. [2024-06-14 13:18:13,213 INFO L125 PetriNetUnfolderBase]: For 646451/646465 co-relation queries the response was YES. [2024-06-14 13:18:13,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40909 conditions, 5334 events. 3250/5334 cut-off events. For 646451/646465 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 33755 event pairs, 620 based on Foata normal form. 16/5350 useless extension candidates. Maximal degree in co-relation 40728. Up to 4788 conditions per place. [2024-06-14 13:18:13,294 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 473 selfloop transitions, 105 changer transitions 0/583 dead transitions. [2024-06-14 13:18:13,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 583 transitions, 8773 flow [2024-06-14 13:18:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:18:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:18:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 13:18:13,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.386046511627907 [2024-06-14 13:18:13,296 INFO L175 Difference]: Start difference. First operand has 421 places, 545 transitions, 7225 flow. Second operand 10 states and 166 transitions. [2024-06-14 13:18:13,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 583 transitions, 8773 flow [2024-06-14 13:18:16,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 583 transitions, 8233 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 13:18:16,130 INFO L231 Difference]: Finished difference. Result has 424 places, 551 transitions, 6995 flow [2024-06-14 13:18:16,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6689, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6995, PETRI_PLACES=424, PETRI_TRANSITIONS=551} [2024-06-14 13:18:16,130 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 380 predicate places. [2024-06-14 13:18:16,130 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 551 transitions, 6995 flow [2024-06-14 13:18:16,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:16,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:16,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:16,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:18:16,131 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:16,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:16,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1100816324, now seen corresponding path program 15 times [2024-06-14 13:18:16,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:16,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653263447] [2024-06-14 13:18:16,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:16,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:19,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:19,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653263447] [2024-06-14 13:18:19,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653263447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:19,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:19,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:19,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277006039] [2024-06-14 13:18:19,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:19,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:19,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:19,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:19,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:19,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:19,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 551 transitions, 6995 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:19,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:19,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:19,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:21,933 INFO L124 PetriNetUnfolderBase]: 3255/5336 cut-off events. [2024-06-14 13:18:21,934 INFO L125 PetriNetUnfolderBase]: For 648058/648064 co-relation queries the response was YES. [2024-06-14 13:18:21,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40364 conditions, 5336 events. 3255/5336 cut-off events. For 648058/648064 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 33685 event pairs, 638 based on Foata normal form. 2/5337 useless extension candidates. Maximal degree in co-relation 40182. Up to 4495 conditions per place. [2024-06-14 13:18:22,005 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 367 selfloop transitions, 215 changer transitions 0/587 dead transitions. [2024-06-14 13:18:22,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 587 transitions, 8945 flow [2024-06-14 13:18:22,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:22,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:18:22,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-14 13:18:22,007 INFO L175 Difference]: Start difference. First operand has 424 places, 551 transitions, 6995 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:18:22,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 587 transitions, 8945 flow [2024-06-14 13:18:25,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 587 transitions, 8778 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 13:18:25,132 INFO L231 Difference]: Finished difference. Result has 427 places, 554 transitions, 7318 flow [2024-06-14 13:18:25,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6828, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7318, PETRI_PLACES=427, PETRI_TRANSITIONS=554} [2024-06-14 13:18:25,132 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 383 predicate places. [2024-06-14 13:18:25,133 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 554 transitions, 7318 flow [2024-06-14 13:18:25,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:25,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:25,133 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 13:18:25,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:18:25,133 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:25,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1100936480, now seen corresponding path program 13 times [2024-06-14 13:18:25,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:25,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636175605] [2024-06-14 13:18:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:25,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:28,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:28,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636175605] [2024-06-14 13:18:28,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636175605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:28,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:28,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:28,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664328466] [2024-06-14 13:18:28,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:28,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:28,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:28,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:28,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:28,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:28,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 554 transitions, 7318 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:28,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:28,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:28,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:30,864 INFO L124 PetriNetUnfolderBase]: 3270/5365 cut-off events. [2024-06-14 13:18:30,865 INFO L125 PetriNetUnfolderBase]: For 666485/666491 co-relation queries the response was YES. [2024-06-14 13:18:30,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41090 conditions, 5365 events. 3270/5365 cut-off events. For 666485/666491 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 33899 event pairs, 636 based on Foata normal form. 3/5367 useless extension candidates. Maximal degree in co-relation 40906. Up to 4715 conditions per place. [2024-06-14 13:18:30,939 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 455 selfloop transitions, 132 changer transitions 0/592 dead transitions. [2024-06-14 13:18:30,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 592 transitions, 8882 flow [2024-06-14 13:18:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:18:30,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:18:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-14 13:18:30,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38054968287526425 [2024-06-14 13:18:30,941 INFO L175 Difference]: Start difference. First operand has 427 places, 554 transitions, 7318 flow. Second operand 11 states and 180 transitions. [2024-06-14 13:18:30,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 592 transitions, 8882 flow [2024-06-14 13:18:34,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 592 transitions, 8378 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 13:18:34,490 INFO L231 Difference]: Finished difference. Result has 431 places, 560 transitions, 7174 flow [2024-06-14 13:18:34,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6820, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7174, PETRI_PLACES=431, PETRI_TRANSITIONS=560} [2024-06-14 13:18:34,490 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-14 13:18:34,491 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 560 transitions, 7174 flow [2024-06-14 13:18:34,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:34,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:34,491 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 13:18:34,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:18:34,491 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:34,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:34,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2078880640, now seen corresponding path program 16 times [2024-06-14 13:18:34,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:34,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294097359] [2024-06-14 13:18:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:34,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:38,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:38,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294097359] [2024-06-14 13:18:38,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294097359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:38,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:38,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:38,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850418969] [2024-06-14 13:18:38,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:38,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:38,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:38,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:38,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:38,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:38,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 560 transitions, 7174 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:38,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:38,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:38,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:40,862 INFO L124 PetriNetUnfolderBase]: 3275/5372 cut-off events. [2024-06-14 13:18:40,862 INFO L125 PetriNetUnfolderBase]: For 671216/671222 co-relation queries the response was YES. [2024-06-14 13:18:40,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40982 conditions, 5372 events. 3275/5372 cut-off events. For 671216/671222 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 33956 event pairs, 642 based on Foata normal form. 2/5373 useless extension candidates. Maximal degree in co-relation 40797. Up to 4519 conditions per place. [2024-06-14 13:18:40,990 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 373 selfloop transitions, 214 changer transitions 0/592 dead transitions. [2024-06-14 13:18:40,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 592 transitions, 9128 flow [2024-06-14 13:18:40,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:40,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:18:40,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 13:18:40,992 INFO L175 Difference]: Start difference. First operand has 431 places, 560 transitions, 7174 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:18:40,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 592 transitions, 9128 flow [2024-06-14 13:18:44,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 592 transitions, 8698 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-14 13:18:44,760 INFO L231 Difference]: Finished difference. Result has 431 places, 563 transitions, 7226 flow [2024-06-14 13:18:44,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6744, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7226, PETRI_PLACES=431, PETRI_TRANSITIONS=563} [2024-06-14 13:18:44,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-14 13:18:44,776 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 563 transitions, 7226 flow [2024-06-14 13:18:44,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:44,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:44,777 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 13:18:44,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:18:44,777 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:44,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:44,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1100936294, now seen corresponding path program 17 times [2024-06-14 13:18:44,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:44,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888626666] [2024-06-14 13:18:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:44,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:44,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:48,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:48,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888626666] [2024-06-14 13:18:48,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888626666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:48,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:48,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:48,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131747434] [2024-06-14 13:18:48,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:48,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:48,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:48,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:48,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:48,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:48,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 563 transitions, 7226 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:48,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:48,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:48,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:50,525 INFO L124 PetriNetUnfolderBase]: 3280/5377 cut-off events. [2024-06-14 13:18:50,526 INFO L125 PetriNetUnfolderBase]: For 683047/683053 co-relation queries the response was YES. [2024-06-14 13:18:50,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40973 conditions, 5377 events. 3280/5377 cut-off events. For 683047/683053 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 33971 event pairs, 638 based on Foata normal form. 2/5378 useless extension candidates. Maximal degree in co-relation 40788. Up to 4780 conditions per place. [2024-06-14 13:18:50,612 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 470 selfloop transitions, 117 changer transitions 0/592 dead transitions. [2024-06-14 13:18:50,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 592 transitions, 8522 flow [2024-06-14 13:18:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:50,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:50,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:18:50,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 13:18:50,613 INFO L175 Difference]: Start difference. First operand has 431 places, 563 transitions, 7226 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:18:50,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 592 transitions, 8522 flow [2024-06-14 13:18:53,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 592 transitions, 8093 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:18:53,811 INFO L231 Difference]: Finished difference. Result has 434 places, 566 transitions, 7093 flow [2024-06-14 13:18:53,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6800, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7093, PETRI_PLACES=434, PETRI_TRANSITIONS=566} [2024-06-14 13:18:53,812 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 390 predicate places. [2024-06-14 13:18:53,812 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 566 transitions, 7093 flow [2024-06-14 13:18:53,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:53,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:53,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:53,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:18:53,812 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:18:53,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:53,813 INFO L85 PathProgramCache]: Analyzing trace with hash -418521708, now seen corresponding path program 18 times [2024-06-14 13:18:53,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:53,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816820008] [2024-06-14 13:18:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:53,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:57,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:57,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816820008] [2024-06-14 13:18:57,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816820008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:57,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:57,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:57,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538948445] [2024-06-14 13:18:57,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:57,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:57,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:57,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:57,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:57,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:18:57,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 566 transitions, 7093 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:57,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:57,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:18:57,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:59,407 INFO L124 PetriNetUnfolderBase]: 3285/5386 cut-off events. [2024-06-14 13:18:59,407 INFO L125 PetriNetUnfolderBase]: For 693709/693715 co-relation queries the response was YES. [2024-06-14 13:18:59,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40869 conditions, 5386 events. 3285/5386 cut-off events. For 693709/693715 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 34038 event pairs, 640 based on Foata normal form. 2/5387 useless extension candidates. Maximal degree in co-relation 40683. Up to 4531 conditions per place. [2024-06-14 13:18:59,481 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 355 selfloop transitions, 237 changer transitions 0/597 dead transitions. [2024-06-14 13:18:59,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 597 transitions, 8839 flow [2024-06-14 13:18:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:59,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:18:59,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 13:18:59,483 INFO L175 Difference]: Start difference. First operand has 434 places, 566 transitions, 7093 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:18:59,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 597 transitions, 8839 flow [2024-06-14 13:19:02,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 597 transitions, 8583 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:19:02,613 INFO L231 Difference]: Finished difference. Result has 436 places, 569 transitions, 7359 flow [2024-06-14 13:19:02,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6837, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7359, PETRI_PLACES=436, PETRI_TRANSITIONS=569} [2024-06-14 13:19:02,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-14 13:19:02,619 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 569 transitions, 7359 flow [2024-06-14 13:19:02,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:02,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:02,619 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 13:19:02,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:19:02,619 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:02,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1106477606, now seen corresponding path program 8 times [2024-06-14 13:19:02,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:02,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011699135] [2024-06-14 13:19:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:02,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:05,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:05,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011699135] [2024-06-14 13:19:05,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011699135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:05,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:05,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:05,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701340338] [2024-06-14 13:19:05,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:05,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:05,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:05,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:05,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:06,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:06,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 569 transitions, 7359 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:06,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:06,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:06,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:08,266 INFO L124 PetriNetUnfolderBase]: 3295/5409 cut-off events. [2024-06-14 13:19:08,266 INFO L125 PetriNetUnfolderBase]: For 713156/713170 co-relation queries the response was YES. [2024-06-14 13:19:08,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41387 conditions, 5409 events. 3295/5409 cut-off events. For 713156/713170 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 34289 event pairs, 617 based on Foata normal form. 16/5425 useless extension candidates. Maximal degree in co-relation 41200. Up to 4795 conditions per place. [2024-06-14 13:19:08,348 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 483 selfloop transitions, 119 changer transitions 0/607 dead transitions. [2024-06-14 13:19:08,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 607 transitions, 9157 flow [2024-06-14 13:19:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:19:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:19:08,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-14 13:19:08,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38477801268498946 [2024-06-14 13:19:08,350 INFO L175 Difference]: Start difference. First operand has 436 places, 569 transitions, 7359 flow. Second operand 11 states and 182 transitions. [2024-06-14 13:19:08,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 607 transitions, 9157 flow [2024-06-14 13:19:11,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 607 transitions, 8675 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:11,695 INFO L231 Difference]: Finished difference. Result has 441 places, 572 transitions, 7169 flow [2024-06-14 13:19:11,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6877, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7169, PETRI_PLACES=441, PETRI_TRANSITIONS=572} [2024-06-14 13:19:11,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 397 predicate places. [2024-06-14 13:19:11,702 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 572 transitions, 7169 flow [2024-06-14 13:19:11,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:11,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:11,703 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 13:19:11,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:19:11,703 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:11,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:11,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1110196676, now seen corresponding path program 9 times [2024-06-14 13:19:11,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:11,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184565649] [2024-06-14 13:19:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:11,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:15,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:15,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184565649] [2024-06-14 13:19:15,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184565649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:15,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:15,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:15,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518567966] [2024-06-14 13:19:15,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:15,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:15,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:15,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:15,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 572 transitions, 7169 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:15,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:15,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:15,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:17,439 INFO L124 PetriNetUnfolderBase]: 3305/5425 cut-off events. [2024-06-14 13:19:17,439 INFO L125 PetriNetUnfolderBase]: For 724023/724037 co-relation queries the response was YES. [2024-06-14 13:19:17,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41291 conditions, 5425 events. 3305/5425 cut-off events. For 724023/724037 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 34381 event pairs, 619 based on Foata normal form. 16/5441 useless extension candidates. Maximal degree in co-relation 41103. Up to 4935 conditions per place. [2024-06-14 13:19:17,526 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 534 selfloop transitions, 67 changer transitions 0/606 dead transitions. [2024-06-14 13:19:17,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 606 transitions, 8729 flow [2024-06-14 13:19:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:19:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:19:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-14 13:19:17,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699788583509514 [2024-06-14 13:19:17,537 INFO L175 Difference]: Start difference. First operand has 441 places, 572 transitions, 7169 flow. Second operand 11 states and 175 transitions. [2024-06-14 13:19:17,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 606 transitions, 8729 flow [2024-06-14 13:19:21,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 606 transitions, 8333 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-14 13:19:21,099 INFO L231 Difference]: Finished difference. Result has 442 places, 575 transitions, 6959 flow [2024-06-14 13:19:21,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6779, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6959, PETRI_PLACES=442, PETRI_TRANSITIONS=575} [2024-06-14 13:19:21,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-14 13:19:21,113 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 575 transitions, 6959 flow [2024-06-14 13:19:21,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:21,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:21,113 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 13:19:21,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:19:21,113 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:21,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:21,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1045350754, now seen corresponding path program 19 times [2024-06-14 13:19:21,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:21,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037015661] [2024-06-14 13:19:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:21,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:24,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037015661] [2024-06-14 13:19:24,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037015661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:24,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:24,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455993722] [2024-06-14 13:19:24,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:24,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:24,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:24,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:24,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:24,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 575 transitions, 6959 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:24,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:24,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:24,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:27,404 INFO L124 PetriNetUnfolderBase]: 3310/5435 cut-off events. [2024-06-14 13:19:27,404 INFO L125 PetriNetUnfolderBase]: For 728686/728692 co-relation queries the response was YES. [2024-06-14 13:19:27,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40989 conditions, 5435 events. 3310/5435 cut-off events. For 728686/728692 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 34464 event pairs, 646 based on Foata normal form. 2/5436 useless extension candidates. Maximal degree in co-relation 40801. Up to 4565 conditions per place. [2024-06-14 13:19:27,490 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 351 selfloop transitions, 245 changer transitions 0/601 dead transitions. [2024-06-14 13:19:27,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 601 transitions, 8486 flow [2024-06-14 13:19:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:27,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:19:27,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-14 13:19:27,492 INFO L175 Difference]: Start difference. First operand has 442 places, 575 transitions, 6959 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:19:27,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 601 transitions, 8486 flow [2024-06-14 13:19:31,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 601 transitions, 8328 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 13:19:31,025 INFO L231 Difference]: Finished difference. Result has 442 places, 578 transitions, 7342 flow [2024-06-14 13:19:31,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6801, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7342, PETRI_PLACES=442, PETRI_TRANSITIONS=578} [2024-06-14 13:19:31,025 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-14 13:19:31,025 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 578 transitions, 7342 flow [2024-06-14 13:19:31,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:31,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:31,026 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 13:19:31,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:19:31,026 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:31,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:31,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1145418226, now seen corresponding path program 14 times [2024-06-14 13:19:31,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:31,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394860047] [2024-06-14 13:19:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:31,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:34,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:34,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394860047] [2024-06-14 13:19:34,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394860047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:34,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:34,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:34,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113607406] [2024-06-14 13:19:34,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:34,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:34,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:34,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:34,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:34,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:34,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 578 transitions, 7342 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:34,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:34,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:34,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:36,428 INFO L124 PetriNetUnfolderBase]: 3320/5443 cut-off events. [2024-06-14 13:19:36,428 INFO L125 PetriNetUnfolderBase]: For 749446/749452 co-relation queries the response was YES. [2024-06-14 13:19:36,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41607 conditions, 5443 events. 3320/5443 cut-off events. For 749446/749452 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 34466 event pairs, 640 based on Foata normal form. 3/5445 useless extension candidates. Maximal degree in co-relation 41418. Up to 4781 conditions per place. [2024-06-14 13:19:36,514 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 474 selfloop transitions, 130 changer transitions 0/609 dead transitions. [2024-06-14 13:19:36,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 609 transitions, 9123 flow [2024-06-14 13:19:36,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:19:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:19:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 13:19:36,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-14 13:19:36,516 INFO L175 Difference]: Start difference. First operand has 442 places, 578 transitions, 7342 flow. Second operand 10 states and 168 transitions. [2024-06-14 13:19:36,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 609 transitions, 9123 flow [2024-06-14 13:19:40,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 609 transitions, 8733 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:40,106 INFO L231 Difference]: Finished difference. Result has 446 places, 581 transitions, 7259 flow [2024-06-14 13:19:40,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6952, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7259, PETRI_PLACES=446, PETRI_TRANSITIONS=581} [2024-06-14 13:19:40,106 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 402 predicate places. [2024-06-14 13:19:40,106 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 581 transitions, 7259 flow [2024-06-14 13:19:40,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:40,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:40,107 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 13:19:40,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:19:40,107 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:40,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:40,108 INFO L85 PathProgramCache]: Analyzing trace with hash -63842586, now seen corresponding path program 10 times [2024-06-14 13:19:40,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:40,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153086956] [2024-06-14 13:19:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:40,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:43,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:43,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153086956] [2024-06-14 13:19:43,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153086956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:43,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:43,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:43,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272906048] [2024-06-14 13:19:43,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:43,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:43,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:43,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:43,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 581 transitions, 7259 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:43,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:43,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:43,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:45,717 INFO L124 PetriNetUnfolderBase]: 3346/5496 cut-off events. [2024-06-14 13:19:45,717 INFO L125 PetriNetUnfolderBase]: For 775088/775102 co-relation queries the response was YES. [2024-06-14 13:19:45,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41968 conditions, 5496 events. 3346/5496 cut-off events. For 775088/775102 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 34992 event pairs, 565 based on Foata normal form. 16/5512 useless extension candidates. Maximal degree in co-relation 41778. Up to 4589 conditions per place. [2024-06-14 13:19:45,793 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 426 selfloop transitions, 190 changer transitions 0/621 dead transitions. [2024-06-14 13:19:45,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 621 transitions, 9185 flow [2024-06-14 13:19:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:45,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:19:45,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-14 13:19:45,795 INFO L175 Difference]: Start difference. First operand has 446 places, 581 transitions, 7259 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:19:45,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 621 transitions, 9185 flow [2024-06-14 13:19:49,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 621 transitions, 8851 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:49,508 INFO L231 Difference]: Finished difference. Result has 449 places, 590 transitions, 7461 flow [2024-06-14 13:19:49,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6925, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7461, PETRI_PLACES=449, PETRI_TRANSITIONS=590} [2024-06-14 13:19:49,509 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-14 13:19:49,509 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 590 transitions, 7461 flow [2024-06-14 13:19:49,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:49,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:49,509 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 13:19:49,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 13:19:49,510 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:49,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:49,510 INFO L85 PathProgramCache]: Analyzing trace with hash -64258296, now seen corresponding path program 11 times [2024-06-14 13:19:49,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:49,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989155273] [2024-06-14 13:19:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:49,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:52,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:52,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989155273] [2024-06-14 13:19:52,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989155273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:52,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:52,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:19:52,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545642661] [2024-06-14 13:19:52,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:52,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:19:52,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:52,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:19:52,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:19:52,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 13:19:52,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 590 transitions, 7461 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:52,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:52,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 13:19:52,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:55,152 INFO L124 PetriNetUnfolderBase]: 3340/5480 cut-off events. [2024-06-14 13:19:55,152 INFO L125 PetriNetUnfolderBase]: For 777103/777117 co-relation queries the response was YES. [2024-06-14 13:19:55,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42291 conditions, 5480 events. 3340/5480 cut-off events. For 777103/777117 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 34830 event pairs, 628 based on Foata normal form. 16/5496 useless extension candidates. Maximal degree in co-relation 42100. Up to 4927 conditions per place. [2024-06-14 13:19:55,244 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 508 selfloop transitions, 102 changer transitions 0/615 dead transitions. [2024-06-14 13:19:55,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 615 transitions, 8755 flow [2024-06-14 13:19:55,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:19:55,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 13:19:55,246 INFO L175 Difference]: Start difference. First operand has 449 places, 590 transitions, 7461 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:19:55,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 615 transitions, 8755 flow [2024-06-14 13:19:58,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 615 transitions, 8553 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 13:19:58,653 INFO L231 Difference]: Finished difference. Result has 454 places, 590 transitions, 7469 flow [2024-06-14 13:19:58,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7259, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7469, PETRI_PLACES=454, PETRI_TRANSITIONS=590} [2024-06-14 13:19:58,658 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 410 predicate places. [2024-06-14 13:19:58,658 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 590 transitions, 7469 flow [2024-06-14 13:19:58,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:58,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:58,658 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 13:19:58,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 13:19:58,668 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:19:58,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:58,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1110202256, now seen corresponding path program 12 times [2024-06-14 13:19:58,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:58,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041838266] [2024-06-14 13:19:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:58,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15