./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix014.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix014.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix014.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix014.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:00:22,169 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:00:22,244 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:00:22,248 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:00:22,248 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:00:22,273 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:00:22,274 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:00:22,274 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:00:22,274 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:00:22,275 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:00:22,275 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:00:22,275 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:00:22,276 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:00:22,276 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:00:22,276 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:00:22,276 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:00:22,277 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:00:22,277 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:00:22,277 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:00:22,277 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:00:22,277 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:00:22,281 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:00:22,281 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:00:22,282 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:00:22,285 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:00:22,285 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:00:22,285 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:00:22,286 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:00:22,287 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:00:22,287 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:00:22,288 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:00:22,288 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:00:22,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:00:22,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:00:22,289 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:00:22,289 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:00:22,289 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:00:22,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:00:22,289 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:00:22,289 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:00:22,290 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:00:22,290 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:00:22,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:00:22,290 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:00:22,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:00:22,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:00:22,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:00:22,540 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:00:22,541 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:00:22,542 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix014.opt.yml/witness.yml [2024-06-14 12:00:22,773 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:00:22,774 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:00:22,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix014.opt.i [2024-06-14 12:00:23,835 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:00:24,029 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:00:24,029 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix014.opt.i [2024-06-14 12:00:24,062 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/416a15f4f/24db191b40494db4a86e68472dda2f13/FLAG12575bbf7 [2024-06-14 12:00:24,077 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/416a15f4f/24db191b40494db4a86e68472dda2f13 [2024-06-14 12:00:24,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:00:24,078 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:00:24,081 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:00:24,082 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:00:24,085 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:00:24,086 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:00:22" (1/2) ... [2024-06-14 12:00:24,087 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa9892 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:00:24, skipping insertion in model container [2024-06-14 12:00:24,087 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:00:22" (1/2) ... [2024-06-14 12:00:24,088 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@768181f8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:00:24, skipping insertion in model container [2024-06-14 12:00:24,088 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:00:24" (2/2) ... [2024-06-14 12:00:24,089 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa9892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24, skipping insertion in model container [2024-06-14 12:00:24,089 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:00:24" (2/2) ... [2024-06-14 12:00:24,089 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:00:24,193 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:00:24,193 INFO L97 edCorrectnessWitness]: Location invariant before [L877-L877] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-14 12:00:24,194 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-14 12:00:24,194 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-14 12:00:24,194 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-14 12:00:24,194 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:00:24,194 INFO L106 edCorrectnessWitness]: ghost_update [L870-L870] multithreaded = 1; [2024-06-14 12:00:24,231 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:00:24,602 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:00:24,613 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:00:24,720 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:00:24,758 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:00:24,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24 WrapperNode [2024-06-14 12:00:24,758 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:00:24,760 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:00:24,760 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:00:24,760 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:00:24,765 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24" (1/1) ... [2024-06-14 12:00:24,803 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24" (1/1) ... [2024-06-14 12:00:24,838 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 162 [2024-06-14 12:00:24,838 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:00:24,839 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:00:24,839 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:00:24,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:00:24,847 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24" (1/1) ... [2024-06-14 12:00:24,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24" (1/1) ... [2024-06-14 12:00:24,851 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24" (1/1) ... [2024-06-14 12:00:24,863 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:00:24,876 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24" (1/1) ... [2024-06-14 12:00:24,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24" (1/1) ... [2024-06-14 12:00:24,884 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24" (1/1) ... [2024-06-14 12:00:24,900 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24" (1/1) ... [2024-06-14 12:00:24,902 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24" (1/1) ... [2024-06-14 12:00:24,904 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24" (1/1) ... [2024-06-14 12:00:24,906 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:00:24,907 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:00:24,907 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:00:24,907 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:00:24,908 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24" (1/1) ... [2024-06-14 12:00:24,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:00:24,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:00:24,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:00:24,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:00:24,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:00:24,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:00:24,959 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:00:24,960 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:00:24,960 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:00:24,960 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:00:24,960 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:00:24,960 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:00:24,961 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:00:24,961 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:00:24,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:00:24,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:00:24,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:00:24,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:00:24,963 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:00:25,116 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:00:25,118 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:00:25,489 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:00:25,489 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:00:25,675 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:00:25,675 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:00:25,676 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:00:25 BoogieIcfgContainer [2024-06-14 12:00:25,676 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:00:25,678 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:00:25,678 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:00:25,680 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:00:25,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:00:22" (1/4) ... [2024-06-14 12:00:25,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d351a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:00:25, skipping insertion in model container [2024-06-14 12:00:25,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:00:24" (2/4) ... [2024-06-14 12:00:25,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d351a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:00:25, skipping insertion in model container [2024-06-14 12:00:25,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:00:24" (3/4) ... [2024-06-14 12:00:25,682 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d351a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:00:25, skipping insertion in model container [2024-06-14 12:00:25,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:00:25" (4/4) ... [2024-06-14 12:00:25,683 INFO L112 eAbstractionObserver]: Analyzing ICFG mix014.opt.i [2024-06-14 12:00:25,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:00:25,696 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:00:25,697 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:00:25,747 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:00:25,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 12:00:25,796 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-14 12:00:25,796 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:00:25,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 91 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:00:25,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 12:00:25,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-14 12:00:25,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:00:25,817 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;@1af228f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:00:25,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:00:25,821 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:00:25,821 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:00:25,821 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:00:25,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:25,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:00:25,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:25,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:25,826 INFO L85 PathProgramCache]: Analyzing trace with hash 255920879, now seen corresponding path program 1 times [2024-06-14 12:00:25,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:25,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888637941] [2024-06-14 12:00:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:25,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:26,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:26,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888637941] [2024-06-14 12:00:26,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888637941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:26,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:26,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:00:26,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626750982] [2024-06-14 12:00:26,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:26,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:00:26,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:26,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:00:26,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:00:26,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-06-14 12:00:26,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:26,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:26,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-06-14 12:00:26,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:28,170 INFO L124 PetriNetUnfolderBase]: 6201/8886 cut-off events. [2024-06-14 12:00:28,170 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-14 12:00:28,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17644 conditions, 8886 events. 6201/8886 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 51694 event pairs, 4673 based on Foata normal form. 1/8595 useless extension candidates. Maximal degree in co-relation 17628. Up to 8487 conditions per place. [2024-06-14 12:00:28,225 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 43 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-14 12:00:28,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 233 flow [2024-06-14 12:00:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:00:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:00:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-14 12:00:28,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-06-14 12:00:28,235 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 103 transitions. [2024-06-14 12:00:28,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 233 flow [2024-06-14 12:00:28,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:00:28,239 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-14 12:00:28,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-14 12:00:28,243 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-14 12:00:28,243 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-14 12:00:28,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:28,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:28,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:28,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:00:28,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:28,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:28,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1126884046, now seen corresponding path program 1 times [2024-06-14 12:00:28,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:28,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197598313] [2024-06-14 12:00:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:28,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:29,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:29,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197598313] [2024-06-14 12:00:29,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197598313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:29,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:29,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:00:29,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620487512] [2024-06-14 12:00:29,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:29,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:00:29,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:29,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:00:29,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:00:29,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-14 12:00:29,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:29,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:29,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-14 12:00:29,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:30,224 INFO L124 PetriNetUnfolderBase]: 7096/9901 cut-off events. [2024-06-14 12:00:30,225 INFO L125 PetriNetUnfolderBase]: For 2066/2066 co-relation queries the response was YES. [2024-06-14 12:00:30,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22641 conditions, 9901 events. 7096/9901 cut-off events. For 2066/2066 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 55659 event pairs, 4749 based on Foata normal form. 4/9837 useless extension candidates. Maximal degree in co-relation 22626. Up to 9657 conditions per place. [2024-06-14 12:00:30,278 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 54 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-14 12:00:30,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 327 flow [2024-06-14 12:00:30,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:00:30,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:00:30,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-14 12:00:30,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-06-14 12:00:30,280 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 131 transitions. [2024-06-14 12:00:30,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 327 flow [2024-06-14 12:00:30,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:00:30,282 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-14 12:00:30,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-14 12:00:30,283 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-14 12:00:30,283 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-14 12:00:30,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:30,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:30,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:30,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:00:30,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:30,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:30,284 INFO L85 PathProgramCache]: Analyzing trace with hash 573668844, now seen corresponding path program 1 times [2024-06-14 12:00:30,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:30,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381253783] [2024-06-14 12:00:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:30,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:31,197 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 12:00:31,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:31,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381253783] [2024-06-14 12:00:31,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381253783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:31,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:31,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:00:31,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482440976] [2024-06-14 12:00:31,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:31,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:00:31,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:00:31,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:00:31,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:00:31,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:31,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:31,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:00:31,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:32,654 INFO L124 PetriNetUnfolderBase]: 9050/12584 cut-off events. [2024-06-14 12:00:32,655 INFO L125 PetriNetUnfolderBase]: For 7208/7208 co-relation queries the response was YES. [2024-06-14 12:00:32,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31841 conditions, 12584 events. 9050/12584 cut-off events. For 7208/7208 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 69987 event pairs, 4826 based on Foata normal form. 7/12531 useless extension candidates. Maximal degree in co-relation 31824. Up to 12159 conditions per place. [2024-06-14 12:00:32,744 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 73 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-14 12:00:32,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 545 flow [2024-06-14 12:00:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:00:32,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:00:32,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-14 12:00:32,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-14 12:00:32,747 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 167 transitions. [2024-06-14 12:00:32,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 545 flow [2024-06-14 12:00:32,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 526 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:00:32,754 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 314 flow [2024-06-14 12:00:32,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-14 12:00:32,756 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-14 12:00:32,756 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 314 flow [2024-06-14 12:00:32,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:32,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:32,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:32,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:00:32,757 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:32,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:32,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1540003371, now seen corresponding path program 1 times [2024-06-14 12:00:32,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:32,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989462453] [2024-06-14 12:00:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:32,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:33,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:33,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989462453] [2024-06-14 12:00:33,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989462453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:33,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:33,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:00:33,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917602764] [2024-06-14 12:00:33,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:33,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:00:33,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:33,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:00:33,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:00:34,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:00:34,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 12:00:34,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:34,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:00:34,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:35,751 INFO L124 PetriNetUnfolderBase]: 9079/12628 cut-off events. [2024-06-14 12:00:35,752 INFO L125 PetriNetUnfolderBase]: For 17058/17063 co-relation queries the response was YES. [2024-06-14 12:00:35,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37336 conditions, 12628 events. 9079/12628 cut-off events. For 17058/17063 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 70411 event pairs, 3910 based on Foata normal form. 18/12586 useless extension candidates. Maximal degree in co-relation 37316. Up to 12124 conditions per place. [2024-06-14 12:00:35,857 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 80 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-14 12:00:35,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 113 transitions, 690 flow [2024-06-14 12:00:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:00:35,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:00:35,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-14 12:00:35,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595679012345679 [2024-06-14 12:00:35,860 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 314 flow. Second operand 6 states and 193 transitions. [2024-06-14 12:00:35,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 113 transitions, 690 flow [2024-06-14 12:00:35,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 678 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-14 12:00:35,871 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 391 flow [2024-06-14 12:00:35,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-14 12:00:35,872 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2024-06-14 12:00:35,872 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 391 flow [2024-06-14 12:00:35,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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 12:00:35,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:35,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:35,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:00:35,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:35,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:35,874 INFO L85 PathProgramCache]: Analyzing trace with hash 361712804, now seen corresponding path program 1 times [2024-06-14 12:00:35,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:35,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572860843] [2024-06-14 12:00:35,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:35,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:36,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:36,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572860843] [2024-06-14 12:00:36,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572860843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:36,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:36,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:00:36,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593846503] [2024-06-14 12:00:36,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:36,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:00:36,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:36,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:00:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:00:37,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:00:37,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 391 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:37,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:37,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:00:37,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:38,633 INFO L124 PetriNetUnfolderBase]: 7920/11341 cut-off events. [2024-06-14 12:00:38,634 INFO L125 PetriNetUnfolderBase]: For 21902/21902 co-relation queries the response was YES. [2024-06-14 12:00:38,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36258 conditions, 11341 events. 7920/11341 cut-off events. For 21902/21902 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 65689 event pairs, 4036 based on Foata normal form. 3/11168 useless extension candidates. Maximal degree in co-relation 36235. Up to 10775 conditions per place. [2024-06-14 12:00:38,701 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 67 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-14 12:00:38,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 86 transitions, 589 flow [2024-06-14 12:00:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:00:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:00:38,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 12:00:38,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074074074074074 [2024-06-14 12:00:38,703 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 391 flow. Second operand 5 states and 137 transitions. [2024-06-14 12:00:38,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 86 transitions, 589 flow [2024-06-14 12:00:38,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 86 transitions, 520 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:00:38,713 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 353 flow [2024-06-14 12:00:38,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-14 12:00:38,720 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-14 12:00:38,720 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 353 flow [2024-06-14 12:00:38,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:38,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:38,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:38,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:00:38,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:38,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:38,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1696740822, now seen corresponding path program 1 times [2024-06-14 12:00:38,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:38,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647618907] [2024-06-14 12:00:38,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:38,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:39,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:39,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647618907] [2024-06-14 12:00:39,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647618907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:39,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:39,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:00:39,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495999411] [2024-06-14 12:00:39,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:39,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:00:39,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:39,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:00:39,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:00:39,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:00:39,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:39,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:39,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:00:39,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:41,338 INFO L124 PetriNetUnfolderBase]: 7911/11300 cut-off events. [2024-06-14 12:00:41,338 INFO L125 PetriNetUnfolderBase]: For 25135/25135 co-relation queries the response was YES. [2024-06-14 12:00:41,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36718 conditions, 11300 events. 7911/11300 cut-off events. For 25135/25135 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 65075 event pairs, 3900 based on Foata normal form. 3/11140 useless extension candidates. Maximal degree in co-relation 36693. Up to 10748 conditions per place. [2024-06-14 12:00:41,427 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 74 selfloop transitions, 14 changer transitions 0/97 dead transitions. [2024-06-14 12:00:41,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 97 transitions, 619 flow [2024-06-14 12:00:41,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:00:41,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:00:41,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 12:00:41,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030864197530864 [2024-06-14 12:00:41,429 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 353 flow. Second operand 6 states and 163 transitions. [2024-06-14 12:00:41,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 97 transitions, 619 flow [2024-06-14 12:00:41,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 97 transitions, 590 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 12:00:41,441 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 399 flow [2024-06-14 12:00:41,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=399, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2024-06-14 12:00:41,442 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-14 12:00:41,443 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 399 flow [2024-06-14 12:00:41,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:41,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:41,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:41,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:00:41,443 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:41,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1065077663, now seen corresponding path program 1 times [2024-06-14 12:00:41,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:41,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773870836] [2024-06-14 12:00:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:42,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:42,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773870836] [2024-06-14 12:00:42,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773870836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:42,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:42,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:00:42,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881241408] [2024-06-14 12:00:42,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:42,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:00:42,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:42,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:00:42,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:00:42,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:42,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 399 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 12:00:42,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:42,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:42,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:44,058 INFO L124 PetriNetUnfolderBase]: 9074/12591 cut-off events. [2024-06-14 12:00:44,059 INFO L125 PetriNetUnfolderBase]: For 39963/40055 co-relation queries the response was YES. [2024-06-14 12:00:44,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44531 conditions, 12591 events. 9074/12591 cut-off events. For 39963/40055 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69872 event pairs, 4533 based on Foata normal form. 14/12562 useless extension candidates. Maximal degree in co-relation 44506. Up to 12190 conditions per place. [2024-06-14 12:00:44,153 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 74 selfloop transitions, 25 changer transitions 0/107 dead transitions. [2024-06-14 12:00:44,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 740 flow [2024-06-14 12:00:44,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:00:44,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:00:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-14 12:00:44,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-14 12:00:44,155 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 399 flow. Second operand 6 states and 168 transitions. [2024-06-14 12:00:44,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 740 flow [2024-06-14 12:00:44,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 107 transitions, 697 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:00:44,168 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 452 flow [2024-06-14 12:00:44,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-14 12:00:44,169 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2024-06-14 12:00:44,169 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 452 flow [2024-06-14 12:00:44,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 12:00:44,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:44,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:44,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:00:44,170 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:44,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:44,170 INFO L85 PathProgramCache]: Analyzing trace with hash -286287293, now seen corresponding path program 2 times [2024-06-14 12:00:44,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:44,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899198593] [2024-06-14 12:00:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:44,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:45,011 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 12:00:45,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:45,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899198593] [2024-06-14 12:00:45,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899198593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:45,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:45,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:00:45,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696427700] [2024-06-14 12:00:45,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:45,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:00:45,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:45,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:00:45,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:00:45,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:45,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 452 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 12:00:45,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:45,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:45,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:47,031 INFO L124 PetriNetUnfolderBase]: 9050/12543 cut-off events. [2024-06-14 12:00:47,032 INFO L125 PetriNetUnfolderBase]: For 46488/46576 co-relation queries the response was YES. [2024-06-14 12:00:47,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45480 conditions, 12543 events. 9050/12543 cut-off events. For 46488/46576 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69527 event pairs, 4553 based on Foata normal form. 4/12499 useless extension candidates. Maximal degree in co-relation 45454. Up to 12160 conditions per place. [2024-06-14 12:00:47,116 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 67 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-14 12:00:47,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 700 flow [2024-06-14 12:00:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:00:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:00:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 12:00:47,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030864197530864 [2024-06-14 12:00:47,118 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 452 flow. Second operand 6 states and 163 transitions. [2024-06-14 12:00:47,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 700 flow [2024-06-14 12:00:47,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 657 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:00:47,136 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 472 flow [2024-06-14 12:00:47,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=472, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2024-06-14 12:00:47,136 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2024-06-14 12:00:47,137 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 472 flow [2024-06-14 12:00:47,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 12:00:47,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:47,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:47,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:00:47,138 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:47,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:47,138 INFO L85 PathProgramCache]: Analyzing trace with hash -264936853, now seen corresponding path program 1 times [2024-06-14 12:00:47,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:47,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218827789] [2024-06-14 12:00:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:47,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:48,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:48,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218827789] [2024-06-14 12:00:48,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218827789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:48,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:48,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:48,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218294148] [2024-06-14 12:00:48,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:48,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:48,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:48,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:48,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:48,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:48,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 472 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:48,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:48,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:48,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:50,176 INFO L124 PetriNetUnfolderBase]: 9316/13008 cut-off events. [2024-06-14 12:00:50,176 INFO L125 PetriNetUnfolderBase]: For 56145/56237 co-relation queries the response was YES. [2024-06-14 12:00:50,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48371 conditions, 13008 events. 9316/13008 cut-off events. For 56145/56237 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 73318 event pairs, 4256 based on Foata normal form. 9/12974 useless extension candidates. Maximal degree in co-relation 48344. Up to 12249 conditions per place. [2024-06-14 12:00:50,266 INFO L140 encePairwiseOnDemand]: 38/54 looper letters, 100 selfloop transitions, 55 changer transitions 0/163 dead transitions. [2024-06-14 12:00:50,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 163 transitions, 1334 flow [2024-06-14 12:00:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:00:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:00:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-14 12:00:50,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-14 12:00:50,267 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 472 flow. Second operand 8 states and 228 transitions. [2024-06-14 12:00:50,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 163 transitions, 1334 flow [2024-06-14 12:00:50,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 163 transitions, 1171 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:00:50,297 INFO L231 Difference]: Finished difference. Result has 82 places, 110 transitions, 793 flow [2024-06-14 12:00:50,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=793, PETRI_PLACES=82, PETRI_TRANSITIONS=110} [2024-06-14 12:00:50,298 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-14 12:00:50,298 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 110 transitions, 793 flow [2024-06-14 12:00:50,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:50,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:50,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:50,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:00:50,299 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:50,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:50,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1067156129, now seen corresponding path program 2 times [2024-06-14 12:00:50,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:50,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657369715] [2024-06-14 12:00:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:50,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:51,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:51,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657369715] [2024-06-14 12:00:51,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657369715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:51,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:51,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:51,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519029629] [2024-06-14 12:00:51,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:51,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:51,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:51,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:51,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:51,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:51,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 110 transitions, 793 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:51,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:51,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:51,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:53,611 INFO L124 PetriNetUnfolderBase]: 9396/13180 cut-off events. [2024-06-14 12:00:53,611 INFO L125 PetriNetUnfolderBase]: For 72842/72995 co-relation queries the response was YES. [2024-06-14 12:00:53,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53352 conditions, 13180 events. 9396/13180 cut-off events. For 72842/72995 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 74724 event pairs, 4279 based on Foata normal form. 38/13175 useless extension candidates. Maximal degree in co-relation 53321. Up to 12319 conditions per place. [2024-06-14 12:00:53,717 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 87 selfloop transitions, 65 changer transitions 0/160 dead transitions. [2024-06-14 12:00:53,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 160 transitions, 1389 flow [2024-06-14 12:00:53,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-14 12:00:53,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-14 12:00:53,718 INFO L175 Difference]: Start difference. First operand has 82 places, 110 transitions, 793 flow. Second operand 7 states and 196 transitions. [2024-06-14 12:00:53,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 160 transitions, 1389 flow [2024-06-14 12:00:53,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 160 transitions, 1348 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-14 12:00:53,777 INFO L231 Difference]: Finished difference. Result has 87 places, 119 transitions, 1002 flow [2024-06-14 12:00:53,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1002, PETRI_PLACES=87, PETRI_TRANSITIONS=119} [2024-06-14 12:00:53,778 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-06-14 12:00:53,778 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 119 transitions, 1002 flow [2024-06-14 12:00:53,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:53,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:53,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:53,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:00:53,779 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:53,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:53,779 INFO L85 PathProgramCache]: Analyzing trace with hash -284969399, now seen corresponding path program 3 times [2024-06-14 12:00:53,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:53,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285552037] [2024-06-14 12:00:53,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:53,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:54,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:54,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285552037] [2024-06-14 12:00:54,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285552037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:54,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:54,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:54,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255935081] [2024-06-14 12:00:54,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:54,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:54,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:54,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:54,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:54,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:54,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 119 transitions, 1002 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:54,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:54,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:54,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:56,634 INFO L124 PetriNetUnfolderBase]: 9436/13209 cut-off events. [2024-06-14 12:00:56,634 INFO L125 PetriNetUnfolderBase]: For 85853/86076 co-relation queries the response was YES. [2024-06-14 12:00:56,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55871 conditions, 13209 events. 9436/13209 cut-off events. For 85853/86076 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 74396 event pairs, 4289 based on Foata normal form. 82/13242 useless extension candidates. Maximal degree in co-relation 55838. Up to 12347 conditions per place. [2024-06-14 12:00:56,730 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 87 selfloop transitions, 79 changer transitions 0/174 dead transitions. [2024-06-14 12:00:56,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 174 transitions, 1784 flow [2024-06-14 12:00:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-14 12:00:56,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211640211640212 [2024-06-14 12:00:56,732 INFO L175 Difference]: Start difference. First operand has 87 places, 119 transitions, 1002 flow. Second operand 7 states and 197 transitions. [2024-06-14 12:00:56,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 174 transitions, 1784 flow [2024-06-14 12:00:56,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 174 transitions, 1615 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 12:00:56,804 INFO L231 Difference]: Finished difference. Result has 90 places, 133 transitions, 1211 flow [2024-06-14 12:00:56,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1211, PETRI_PLACES=90, PETRI_TRANSITIONS=133} [2024-06-14 12:00:56,805 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2024-06-14 12:00:56,805 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 133 transitions, 1211 flow [2024-06-14 12:00:56,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:56,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:56,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:56,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:00:56,806 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:56,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:56,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1519701577, now seen corresponding path program 4 times [2024-06-14 12:00:56,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:56,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895522439] [2024-06-14 12:00:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:56,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:00:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:00:57,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:00:57,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895522439] [2024-06-14 12:00:57,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895522439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:00:57,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:00:57,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:00:57,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007848955] [2024-06-14 12:00:57,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:00:57,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:00:57,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:00:57,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:00:57,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:00:57,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:00:57,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 133 transitions, 1211 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:57,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:00:57,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:00:57,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:00:59,565 INFO L124 PetriNetUnfolderBase]: 9420/13211 cut-off events. [2024-06-14 12:00:59,566 INFO L125 PetriNetUnfolderBase]: For 86557/86728 co-relation queries the response was YES. [2024-06-14 12:00:59,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55643 conditions, 13211 events. 9420/13211 cut-off events. For 86557/86728 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 74701 event pairs, 4277 based on Foata normal form. 82/13245 useless extension candidates. Maximal degree in co-relation 55609. Up to 12336 conditions per place. [2024-06-14 12:00:59,663 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 83 selfloop transitions, 81 changer transitions 0/172 dead transitions. [2024-06-14 12:00:59,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 172 transitions, 1735 flow [2024-06-14 12:00:59,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:00:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:00:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-14 12:00:59,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-14 12:00:59,665 INFO L175 Difference]: Start difference. First operand has 90 places, 133 transitions, 1211 flow. Second operand 7 states and 194 transitions. [2024-06-14 12:00:59,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 172 transitions, 1735 flow [2024-06-14 12:00:59,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 172 transitions, 1604 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-14 12:00:59,751 INFO L231 Difference]: Finished difference. Result has 95 places, 133 transitions, 1256 flow [2024-06-14 12:00:59,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1256, PETRI_PLACES=95, PETRI_TRANSITIONS=133} [2024-06-14 12:00:59,752 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-14 12:00:59,752 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 133 transitions, 1256 flow [2024-06-14 12:00:59,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:00:59,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:00:59,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:00:59,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:00:59,753 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:00:59,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:00:59,753 INFO L85 PathProgramCache]: Analyzing trace with hash 54265413, now seen corresponding path program 1 times [2024-06-14 12:00:59,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:00:59,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373253660] [2024-06-14 12:00:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:00:59,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:00:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:00,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:00,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373253660] [2024-06-14 12:01:00,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373253660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:00,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:00,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:01:00,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668932123] [2024-06-14 12:01:00,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:00,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:01:00,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:00,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:01:00,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:01:00,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:01:00,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 133 transitions, 1256 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:00,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:00,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:01:00,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:02,666 INFO L124 PetriNetUnfolderBase]: 9673/14031 cut-off events. [2024-06-14 12:01:02,666 INFO L125 PetriNetUnfolderBase]: For 96484/96515 co-relation queries the response was YES. [2024-06-14 12:01:02,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58301 conditions, 14031 events. 9673/14031 cut-off events. For 96484/96515 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 82589 event pairs, 4590 based on Foata normal form. 20/14017 useless extension candidates. Maximal degree in co-relation 58264. Up to 13037 conditions per place. [2024-06-14 12:01:02,794 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 127 selfloop transitions, 10 changer transitions 0/152 dead transitions. [2024-06-14 12:01:02,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 152 transitions, 1610 flow [2024-06-14 12:01:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:01:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:01:02,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-14 12:01:02,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-06-14 12:01:02,796 INFO L175 Difference]: Start difference. First operand has 95 places, 133 transitions, 1256 flow. Second operand 5 states and 134 transitions. [2024-06-14 12:01:02,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 152 transitions, 1610 flow [2024-06-14 12:01:02,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 152 transitions, 1403 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:02,915 INFO L231 Difference]: Finished difference. Result has 93 places, 137 transitions, 1120 flow [2024-06-14 12:01:02,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1049, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1120, PETRI_PLACES=93, PETRI_TRANSITIONS=137} [2024-06-14 12:01:02,916 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 36 predicate places. [2024-06-14 12:01:02,916 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 137 transitions, 1120 flow [2024-06-14 12:01:02,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:02,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:02,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:02,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:01:02,916 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:02,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:02,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1337350937, now seen corresponding path program 1 times [2024-06-14 12:01:02,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:02,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397529504] [2024-06-14 12:01:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:02,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397529504] [2024-06-14 12:01:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397529504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:04,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:04,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:04,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935983213] [2024-06-14 12:01:04,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:04,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:04,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:04,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:04,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:04,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:04,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 137 transitions, 1120 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:04,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:04,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:04,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:06,348 INFO L124 PetriNetUnfolderBase]: 9450/13216 cut-off events. [2024-06-14 12:01:06,348 INFO L125 PetriNetUnfolderBase]: For 107786/107963 co-relation queries the response was YES. [2024-06-14 12:01:06,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58975 conditions, 13216 events. 9450/13216 cut-off events. For 107786/107963 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 73600 event pairs, 4255 based on Foata normal form. 88/13275 useless extension candidates. Maximal degree in co-relation 58938. Up to 12364 conditions per place. [2024-06-14 12:01:06,507 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 101 selfloop transitions, 85 changer transitions 0/194 dead transitions. [2024-06-14 12:01:06,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 194 transitions, 1842 flow [2024-06-14 12:01:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-14 12:01:06,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-14 12:01:06,509 INFO L175 Difference]: Start difference. First operand has 93 places, 137 transitions, 1120 flow. Second operand 8 states and 221 transitions. [2024-06-14 12:01:06,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 194 transitions, 1842 flow [2024-06-14 12:01:06,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 194 transitions, 1801 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 12:01:06,595 INFO L231 Difference]: Finished difference. Result has 98 places, 145 transitions, 1377 flow [2024-06-14 12:01:06,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1377, PETRI_PLACES=98, PETRI_TRANSITIONS=145} [2024-06-14 12:01:06,596 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 41 predicate places. [2024-06-14 12:01:06,596 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 145 transitions, 1377 flow [2024-06-14 12:01:06,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:06,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:06,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:06,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:01:06,597 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:06,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:06,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1337356517, now seen corresponding path program 2 times [2024-06-14 12:01:06,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:06,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359624146] [2024-06-14 12:01:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:06,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:07,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:07,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359624146] [2024-06-14 12:01:07,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359624146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:07,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:07,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:01:07,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597218772] [2024-06-14 12:01:07,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:07,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:01:07,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:07,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:01:07,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:01:07,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:07,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 145 transitions, 1377 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:07,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:07,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:07,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:09,794 INFO L124 PetriNetUnfolderBase]: 9488/13277 cut-off events. [2024-06-14 12:01:09,794 INFO L125 PetriNetUnfolderBase]: For 122598/122774 co-relation queries the response was YES. [2024-06-14 12:01:09,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60847 conditions, 13277 events. 9488/13277 cut-off events. For 122598/122774 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 74075 event pairs, 4270 based on Foata normal form. 96/13343 useless extension candidates. Maximal degree in co-relation 60809. Up to 12404 conditions per place. [2024-06-14 12:01:09,885 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 94 selfloop transitions, 94 changer transitions 0/196 dead transitions. [2024-06-14 12:01:09,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 196 transitions, 2103 flow [2024-06-14 12:01:09,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:01:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:01:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-14 12:01:09,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-14 12:01:09,887 INFO L175 Difference]: Start difference. First operand has 98 places, 145 transitions, 1377 flow. Second operand 7 states and 199 transitions. [2024-06-14 12:01:09,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 196 transitions, 2103 flow [2024-06-14 12:01:09,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 196 transitions, 1869 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:10,000 INFO L231 Difference]: Finished difference. Result has 99 places, 153 transitions, 1474 flow [2024-06-14 12:01:10,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1474, PETRI_PLACES=99, PETRI_TRANSITIONS=153} [2024-06-14 12:01:10,001 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 42 predicate places. [2024-06-14 12:01:10,001 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 153 transitions, 1474 flow [2024-06-14 12:01:10,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:10,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:10,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:10,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:01:10,001 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:10,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:10,002 INFO L85 PathProgramCache]: Analyzing trace with hash -236763221, now seen corresponding path program 3 times [2024-06-14 12:01:10,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:10,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829298764] [2024-06-14 12:01:10,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:10,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:11,009 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 12:01:11,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:11,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829298764] [2024-06-14 12:01:11,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829298764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:11,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:11,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:11,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930301961] [2024-06-14 12:01:11,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:11,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:11,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:11,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:11,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:11,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:11,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 153 transitions, 1474 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:11,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:11,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:11,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:13,221 INFO L124 PetriNetUnfolderBase]: 9528/13355 cut-off events. [2024-06-14 12:01:13,221 INFO L125 PetriNetUnfolderBase]: For 136068/136301 co-relation queries the response was YES. [2024-06-14 12:01:13,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62214 conditions, 13355 events. 9528/13355 cut-off events. For 136068/136301 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 74718 event pairs, 4259 based on Foata normal form. 150/13471 useless extension candidates. Maximal degree in co-relation 62175. Up to 12446 conditions per place. [2024-06-14 12:01:13,311 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 104 selfloop transitions, 105 changer transitions 0/217 dead transitions. [2024-06-14 12:01:13,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 217 transitions, 2302 flow [2024-06-14 12:01:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:01:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:01:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-14 12:01:13,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020576131687243 [2024-06-14 12:01:13,313 INFO L175 Difference]: Start difference. First operand has 99 places, 153 transitions, 1474 flow. Second operand 9 states and 244 transitions. [2024-06-14 12:01:13,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 217 transitions, 2302 flow [2024-06-14 12:01:13,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 217 transitions, 2043 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:13,418 INFO L231 Difference]: Finished difference. Result has 103 places, 161 transitions, 1568 flow [2024-06-14 12:01:13,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1568, PETRI_PLACES=103, PETRI_TRANSITIONS=161} [2024-06-14 12:01:13,419 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-14 12:01:13,419 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 161 transitions, 1568 flow [2024-06-14 12:01:13,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:13,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:13,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:13,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:01:13,419 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:13,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:13,420 INFO L85 PathProgramCache]: Analyzing trace with hash -141241113, now seen corresponding path program 4 times [2024-06-14 12:01:13,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:13,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460990315] [2024-06-14 12:01:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:13,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:14,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:14,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460990315] [2024-06-14 12:01:14,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460990315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:14,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:14,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:14,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505939917] [2024-06-14 12:01:14,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:14,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:14,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:14,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:14,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:14,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:14,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 161 transitions, 1568 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:14,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:14,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:14,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:16,783 INFO L124 PetriNetUnfolderBase]: 9512/13299 cut-off events. [2024-06-14 12:01:16,783 INFO L125 PetriNetUnfolderBase]: For 149020/149228 co-relation queries the response was YES. [2024-06-14 12:01:16,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62963 conditions, 13299 events. 9512/13299 cut-off events. For 149020/149228 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 73863 event pairs, 4282 based on Foata normal form. 110/13365 useless extension candidates. Maximal degree in co-relation 62924. Up to 12430 conditions per place. [2024-06-14 12:01:16,879 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 93 selfloop transitions, 103 changer transitions 0/204 dead transitions. [2024-06-14 12:01:16,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 204 transitions, 2116 flow [2024-06-14 12:01:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-14 12:01:16,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:01:16,881 INFO L175 Difference]: Start difference. First operand has 103 places, 161 transitions, 1568 flow. Second operand 8 states and 216 transitions. [2024-06-14 12:01:16,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 204 transitions, 2116 flow [2024-06-14 12:01:17,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 204 transitions, 1797 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-14 12:01:17,033 INFO L231 Difference]: Finished difference. Result has 104 places, 161 transitions, 1470 flow [2024-06-14 12:01:17,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1470, PETRI_PLACES=104, PETRI_TRANSITIONS=161} [2024-06-14 12:01:17,034 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 47 predicate places. [2024-06-14 12:01:17,034 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 161 transitions, 1470 flow [2024-06-14 12:01:17,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:17,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:17,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:17,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:01:17,035 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:17,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:17,035 INFO L85 PathProgramCache]: Analyzing trace with hash -133612416, now seen corresponding path program 1 times [2024-06-14 12:01:17,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:17,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186169836] [2024-06-14 12:01:17,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:17,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:18,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:18,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186169836] [2024-06-14 12:01:18,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186169836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:18,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:18,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:18,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241529855] [2024-06-14 12:01:18,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:18,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:18,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:18,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:18,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:18,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 161 transitions, 1470 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:18,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:18,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:18,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:20,585 INFO L124 PetriNetUnfolderBase]: 10339/14850 cut-off events. [2024-06-14 12:01:20,585 INFO L125 PetriNetUnfolderBase]: For 166991/166993 co-relation queries the response was YES. [2024-06-14 12:01:20,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68614 conditions, 14850 events. 10339/14850 cut-off events. For 166991/166993 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 85551 event pairs, 4590 based on Foata normal form. 6/14835 useless extension candidates. Maximal degree in co-relation 68574. Up to 13961 conditions per place. [2024-06-14 12:01:20,697 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 178 selfloop transitions, 21 changer transitions 0/207 dead transitions. [2024-06-14 12:01:20,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 207 transitions, 2059 flow [2024-06-14 12:01:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:20,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 12:01:20,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-14 12:01:20,699 INFO L175 Difference]: Start difference. First operand has 104 places, 161 transitions, 1470 flow. Second operand 8 states and 208 transitions. [2024-06-14 12:01:20,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 207 transitions, 2059 flow [2024-06-14 12:01:20,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 207 transitions, 1777 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 12:01:20,854 INFO L231 Difference]: Finished difference. Result has 105 places, 168 transitions, 1322 flow [2024-06-14 12:01:20,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1322, PETRI_PLACES=105, PETRI_TRANSITIONS=168} [2024-06-14 12:01:20,854 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 48 predicate places. [2024-06-14 12:01:20,854 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 168 transitions, 1322 flow [2024-06-14 12:01:20,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:20,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:20,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:20,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:01:20,855 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:20,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:20,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1373469966, now seen corresponding path program 1 times [2024-06-14 12:01:20,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:20,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974156161] [2024-06-14 12:01:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:20,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:21,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:21,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974156161] [2024-06-14 12:01:21,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974156161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:21,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:21,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:01:21,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856559622] [2024-06-14 12:01:21,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:21,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:01:21,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:21,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:01:21,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:01:21,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:21,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 168 transitions, 1322 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:21,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:21,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:21,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:24,489 INFO L124 PetriNetUnfolderBase]: 11229/15715 cut-off events. [2024-06-14 12:01:24,489 INFO L125 PetriNetUnfolderBase]: For 214947/215154 co-relation queries the response was YES. [2024-06-14 12:01:24,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77063 conditions, 15715 events. 11229/15715 cut-off events. For 214947/215154 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 89238 event pairs, 4210 based on Foata normal form. 26/15721 useless extension candidates. Maximal degree in co-relation 77021. Up to 14821 conditions per place. [2024-06-14 12:01:24,625 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 159 selfloop transitions, 46 changer transitions 0/214 dead transitions. [2024-06-14 12:01:24,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 214 transitions, 2038 flow [2024-06-14 12:01:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:01:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:01:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-14 12:01:24,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-14 12:01:24,628 INFO L175 Difference]: Start difference. First operand has 105 places, 168 transitions, 1322 flow. Second operand 7 states and 193 transitions. [2024-06-14 12:01:24,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 214 transitions, 2038 flow [2024-06-14 12:01:24,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 214 transitions, 1968 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:24,816 INFO L231 Difference]: Finished difference. Result has 107 places, 174 transitions, 1440 flow [2024-06-14 12:01:24,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1440, PETRI_PLACES=107, PETRI_TRANSITIONS=174} [2024-06-14 12:01:24,817 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 50 predicate places. [2024-06-14 12:01:24,817 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 174 transitions, 1440 flow [2024-06-14 12:01:24,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:24,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:24,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:24,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:01:24,817 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:24,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:24,818 INFO L85 PathProgramCache]: Analyzing trace with hash 962618584, now seen corresponding path program 2 times [2024-06-14 12:01:24,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:24,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615114912] [2024-06-14 12:01:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:24,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:25,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:25,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615114912] [2024-06-14 12:01:25,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615114912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:25,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:25,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:01:25,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957208247] [2024-06-14 12:01:25,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:25,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:01:25,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:01:25,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:01:26,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:26,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 174 transitions, 1440 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:26,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:26,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:26,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:28,372 INFO L124 PetriNetUnfolderBase]: 11214/15675 cut-off events. [2024-06-14 12:01:28,373 INFO L125 PetriNetUnfolderBase]: For 242465/242658 co-relation queries the response was YES. [2024-06-14 12:01:28,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79749 conditions, 15675 events. 11214/15675 cut-off events. For 242465/242658 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 88937 event pairs, 4826 based on Foata normal form. 18/15669 useless extension candidates. Maximal degree in co-relation 79706. Up to 14936 conditions per place. [2024-06-14 12:01:28,494 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 158 selfloop transitions, 45 changer transitions 0/212 dead transitions. [2024-06-14 12:01:28,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 212 transitions, 1976 flow [2024-06-14 12:01:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:01:28,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:01:28,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-14 12:01:28,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-14 12:01:28,497 INFO L175 Difference]: Start difference. First operand has 107 places, 174 transitions, 1440 flow. Second operand 7 states and 190 transitions. [2024-06-14 12:01:28,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 212 transitions, 1976 flow [2024-06-14 12:01:28,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 212 transitions, 1875 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 12:01:28,672 INFO L231 Difference]: Finished difference. Result has 111 places, 174 transitions, 1441 flow [2024-06-14 12:01:28,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1441, PETRI_PLACES=111, PETRI_TRANSITIONS=174} [2024-06-14 12:01:28,673 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-06-14 12:01:28,673 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 174 transitions, 1441 flow [2024-06-14 12:01:28,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:28,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:28,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:28,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:01:28,674 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:28,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:28,674 INFO L85 PathProgramCache]: Analyzing trace with hash 597113060, now seen corresponding path program 1 times [2024-06-14 12:01:28,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:28,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669929355] [2024-06-14 12:01:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:28,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:29,521 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 12:01:29,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:29,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669929355] [2024-06-14 12:01:29,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669929355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:29,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:29,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:01:29,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587939522] [2024-06-14 12:01:29,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:29,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:01:29,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:29,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:01:29,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:01:29,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:29,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 174 transitions, 1441 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:29,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:29,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:29,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:32,289 INFO L124 PetriNetUnfolderBase]: 11228/15773 cut-off events. [2024-06-14 12:01:32,290 INFO L125 PetriNetUnfolderBase]: For 264113/264142 co-relation queries the response was YES. [2024-06-14 12:01:32,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80680 conditions, 15773 events. 11228/15773 cut-off events. For 264113/264142 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 88759 event pairs, 5060 based on Foata normal form. 20/15779 useless extension candidates. Maximal degree in co-relation 80635. Up to 15042 conditions per place. [2024-06-14 12:01:32,433 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 173 selfloop transitions, 24 changer transitions 0/213 dead transitions. [2024-06-14 12:01:32,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 213 transitions, 2099 flow [2024-06-14 12:01:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:01:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:01:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-14 12:01:32,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-06-14 12:01:32,435 INFO L175 Difference]: Start difference. First operand has 111 places, 174 transitions, 1441 flow. Second operand 6 states and 164 transitions. [2024-06-14 12:01:32,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 213 transitions, 2099 flow [2024-06-14 12:01:32,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 213 transitions, 1997 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:32,726 INFO L231 Difference]: Finished difference. Result has 111 places, 182 transitions, 1493 flow [2024-06-14 12:01:32,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1493, PETRI_PLACES=111, PETRI_TRANSITIONS=182} [2024-06-14 12:01:32,727 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-06-14 12:01:32,727 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 182 transitions, 1493 flow [2024-06-14 12:01:32,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:32,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:32,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:32,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:01:32,728 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:32,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:32,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1468367750, now seen corresponding path program 2 times [2024-06-14 12:01:32,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:32,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633635461] [2024-06-14 12:01:32,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:32,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:33,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:33,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633635461] [2024-06-14 12:01:33,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633635461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:33,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:33,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:01:33,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730332893] [2024-06-14 12:01:33,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:33,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:01:33,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:33,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:01:33,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:01:33,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:33,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 182 transitions, 1493 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:33,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:33,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:33,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:36,377 INFO L124 PetriNetUnfolderBase]: 11214/15765 cut-off events. [2024-06-14 12:01:36,377 INFO L125 PetriNetUnfolderBase]: For 293709/293757 co-relation queries the response was YES. [2024-06-14 12:01:36,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83894 conditions, 15765 events. 11214/15765 cut-off events. For 293709/293757 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 88853 event pairs, 5047 based on Foata normal form. 31/15784 useless extension candidates. Maximal degree in co-relation 83848. Up to 15030 conditions per place. [2024-06-14 12:01:36,495 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 165 selfloop transitions, 24 changer transitions 0/205 dead transitions. [2024-06-14 12:01:36,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 205 transitions, 1949 flow [2024-06-14 12:01:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:01:36,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:01:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 12:01:36,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2024-06-14 12:01:36,497 INFO L175 Difference]: Start difference. First operand has 111 places, 182 transitions, 1493 flow. Second operand 6 states and 155 transitions. [2024-06-14 12:01:36,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 205 transitions, 1949 flow [2024-06-14 12:01:36,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 205 transitions, 1881 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-14 12:01:36,777 INFO L231 Difference]: Finished difference. Result has 115 places, 182 transitions, 1482 flow [2024-06-14 12:01:36,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1482, PETRI_PLACES=115, PETRI_TRANSITIONS=182} [2024-06-14 12:01:36,778 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2024-06-14 12:01:36,778 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 182 transitions, 1482 flow [2024-06-14 12:01:36,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:36,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:36,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:36,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:01:36,778 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:36,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:36,779 INFO L85 PathProgramCache]: Analyzing trace with hash -316309394, now seen corresponding path program 1 times [2024-06-14 12:01:36,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:36,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833268645] [2024-06-14 12:01:36,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:36,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:37,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:37,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833268645] [2024-06-14 12:01:37,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833268645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:37,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:37,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:01:37,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551159026] [2024-06-14 12:01:37,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:37,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:01:37,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:01:37,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:01:37,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:37,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 182 transitions, 1482 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:37,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:37,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:37,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:40,294 INFO L124 PetriNetUnfolderBase]: 10410/14925 cut-off events. [2024-06-14 12:01:40,294 INFO L125 PetriNetUnfolderBase]: For 274368/274370 co-relation queries the response was YES. [2024-06-14 12:01:40,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78964 conditions, 14925 events. 10410/14925 cut-off events. For 274368/274370 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 85660 event pairs, 4426 based on Foata normal form. 4/14897 useless extension candidates. Maximal degree in co-relation 78916. Up to 14053 conditions per place. [2024-06-14 12:01:40,424 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 187 selfloop transitions, 21 changer transitions 0/216 dead transitions. [2024-06-14 12:01:40,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 216 transitions, 2154 flow [2024-06-14 12:01:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:01:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:01:40,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-14 12:01:40,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49691358024691357 [2024-06-14 12:01:40,426 INFO L175 Difference]: Start difference. First operand has 115 places, 182 transitions, 1482 flow. Second operand 6 states and 161 transitions. [2024-06-14 12:01:40,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 216 transitions, 2154 flow [2024-06-14 12:01:40,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 216 transitions, 2084 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 12:01:40,764 INFO L231 Difference]: Finished difference. Result has 116 places, 190 transitions, 1567 flow [2024-06-14 12:01:40,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1567, PETRI_PLACES=116, PETRI_TRANSITIONS=190} [2024-06-14 12:01:40,765 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2024-06-14 12:01:40,765 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 190 transitions, 1567 flow [2024-06-14 12:01:40,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:40,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:40,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:40,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:01:40,765 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:40,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:40,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1468373702, now seen corresponding path program 2 times [2024-06-14 12:01:40,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:40,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714714502] [2024-06-14 12:01:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:40,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:41,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:41,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714714502] [2024-06-14 12:01:41,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714714502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:41,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:41,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:01:41,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446665337] [2024-06-14 12:01:41,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:41,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:01:41,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:41,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:01:41,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:01:41,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:41,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 190 transitions, 1567 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:41,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:41,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:41,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:44,194 INFO L124 PetriNetUnfolderBase]: 10396/14909 cut-off events. [2024-06-14 12:01:44,194 INFO L125 PetriNetUnfolderBase]: For 302274/302281 co-relation queries the response was YES. [2024-06-14 12:01:44,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81852 conditions, 14909 events. 10396/14909 cut-off events. For 302274/302281 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 85614 event pairs, 4403 based on Foata normal form. 8/14889 useless extension candidates. Maximal degree in co-relation 81803. Up to 14041 conditions per place. [2024-06-14 12:01:44,359 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 181 selfloop transitions, 21 changer transitions 0/210 dead transitions. [2024-06-14 12:01:44,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 210 transitions, 2031 flow [2024-06-14 12:01:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:01:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:01:44,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 12:01:44,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2024-06-14 12:01:44,360 INFO L175 Difference]: Start difference. First operand has 116 places, 190 transitions, 1567 flow. Second operand 6 states and 155 transitions. [2024-06-14 12:01:44,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 210 transitions, 2031 flow [2024-06-14 12:01:44,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 210 transitions, 1951 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-14 12:01:44,843 INFO L231 Difference]: Finished difference. Result has 120 places, 190 transitions, 1538 flow [2024-06-14 12:01:44,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1538, PETRI_PLACES=120, PETRI_TRANSITIONS=190} [2024-06-14 12:01:44,843 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-14 12:01:44,844 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 190 transitions, 1538 flow [2024-06-14 12:01:44,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:44,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:44,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:44,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:01:44,844 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:44,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:44,845 INFO L85 PathProgramCache]: Analyzing trace with hash -372101922, now seen corresponding path program 1 times [2024-06-14 12:01:44,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:44,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368450403] [2024-06-14 12:01:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:44,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:46,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:46,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368450403] [2024-06-14 12:01:46,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368450403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:46,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:46,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:46,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613974297] [2024-06-14 12:01:46,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:46,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:46,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:46,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:46,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:46,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:46,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 190 transitions, 1538 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:46,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:46,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:46,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:48,569 INFO L124 PetriNetUnfolderBase]: 11524/16133 cut-off events. [2024-06-14 12:01:48,569 INFO L125 PetriNetUnfolderBase]: For 390272/390490 co-relation queries the response was YES. [2024-06-14 12:01:48,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92095 conditions, 16133 events. 11524/16133 cut-off events. For 390272/390490 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 92067 event pairs, 4119 based on Foata normal form. 63/16178 useless extension candidates. Maximal degree in co-relation 92044. Up to 14395 conditions per place. [2024-06-14 12:01:48,707 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 131 selfloop transitions, 106 changer transitions 0/246 dead transitions. [2024-06-14 12:01:48,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 246 transitions, 2394 flow [2024-06-14 12:01:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-14 12:01:48,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-14 12:01:48,709 INFO L175 Difference]: Start difference. First operand has 120 places, 190 transitions, 1538 flow. Second operand 8 states and 225 transitions. [2024-06-14 12:01:48,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 246 transitions, 2394 flow [2024-06-14 12:01:49,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 246 transitions, 2327 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:49,052 INFO L231 Difference]: Finished difference. Result has 122 places, 194 transitions, 1780 flow [2024-06-14 12:01:49,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1780, PETRI_PLACES=122, PETRI_TRANSITIONS=194} [2024-06-14 12:01:49,053 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 65 predicate places. [2024-06-14 12:01:49,053 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 194 transitions, 1780 flow [2024-06-14 12:01:49,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:49,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:49,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:49,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:01:49,053 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:49,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:49,053 INFO L85 PathProgramCache]: Analyzing trace with hash -283388292, now seen corresponding path program 2 times [2024-06-14 12:01:49,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:49,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57365030] [2024-06-14 12:01:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:49,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:50,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:50,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57365030] [2024-06-14 12:01:50,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57365030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:50,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:50,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:50,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164445107] [2024-06-14 12:01:50,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:50,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:50,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:50,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:50,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:50,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:50,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 194 transitions, 1780 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:50,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:50,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:50,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:52,776 INFO L124 PetriNetUnfolderBase]: 11688/16445 cut-off events. [2024-06-14 12:01:52,776 INFO L125 PetriNetUnfolderBase]: For 431029/431247 co-relation queries the response was YES. [2024-06-14 12:01:52,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96323 conditions, 16445 events. 11688/16445 cut-off events. For 431029/431247 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 94782 event pairs, 4749 based on Foata normal form. 100/16516 useless extension candidates. Maximal degree in co-relation 96272. Up to 15189 conditions per place. [2024-06-14 12:01:52,916 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 129 selfloop transitions, 107 changer transitions 0/245 dead transitions. [2024-06-14 12:01:52,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 245 transitions, 2474 flow [2024-06-14 12:01:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-14 12:01:52,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-14 12:01:52,918 INFO L175 Difference]: Start difference. First operand has 122 places, 194 transitions, 1780 flow. Second operand 8 states and 221 transitions. [2024-06-14 12:01:52,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 245 transitions, 2474 flow [2024-06-14 12:01:53,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 245 transitions, 2337 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 12:01:53,251 INFO L231 Difference]: Finished difference. Result has 126 places, 197 transitions, 1934 flow [2024-06-14 12:01:53,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1934, PETRI_PLACES=126, PETRI_TRANSITIONS=197} [2024-06-14 12:01:53,252 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 69 predicate places. [2024-06-14 12:01:53,252 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 197 transitions, 1934 flow [2024-06-14 12:01:53,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:53,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:53,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:53,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:01:53,252 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:53,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:53,253 INFO L85 PathProgramCache]: Analyzing trace with hash -370227972, now seen corresponding path program 3 times [2024-06-14 12:01:53,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:53,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150508707] [2024-06-14 12:01:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:53,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:54,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:54,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150508707] [2024-06-14 12:01:54,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150508707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:54,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:54,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:54,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743786852] [2024-06-14 12:01:54,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:54,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:54,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:54,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:54,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:54,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:01:54,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 197 transitions, 1934 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:54,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:54,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:01:54,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:01:57,464 INFO L124 PetriNetUnfolderBase]: 11840/16688 cut-off events. [2024-06-14 12:01:57,464 INFO L125 PetriNetUnfolderBase]: For 465491/465689 co-relation queries the response was YES. [2024-06-14 12:01:57,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100100 conditions, 16688 events. 11840/16688 cut-off events. For 465491/465689 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 96578 event pairs, 4563 based on Foata normal form. 90/16750 useless extension candidates. Maximal degree in co-relation 100047. Up to 15213 conditions per place. [2024-06-14 12:01:57,918 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 129 selfloop transitions, 110 changer transitions 0/248 dead transitions. [2024-06-14 12:01:57,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 248 transitions, 2624 flow [2024-06-14 12:01:57,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:01:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:01:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-14 12:01:57,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-06-14 12:01:57,920 INFO L175 Difference]: Start difference. First operand has 126 places, 197 transitions, 1934 flow. Second operand 8 states and 223 transitions. [2024-06-14 12:01:57,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 248 transitions, 2624 flow [2024-06-14 12:01:58,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 248 transitions, 2387 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:01:58,488 INFO L231 Difference]: Finished difference. Result has 128 places, 199 transitions, 1978 flow [2024-06-14 12:01:58,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1978, PETRI_PLACES=128, PETRI_TRANSITIONS=199} [2024-06-14 12:01:58,489 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2024-06-14 12:01:58,489 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 199 transitions, 1978 flow [2024-06-14 12:01:58,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:58,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:01:58,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:01:58,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:01:58,490 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:01:58,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:01:58,490 INFO L85 PathProgramCache]: Analyzing trace with hash 634169614, now seen corresponding path program 1 times [2024-06-14 12:01:58,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:01:58,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673955180] [2024-06-14 12:01:58,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:01:58,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:01:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:01:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:01:59,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:01:59,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673955180] [2024-06-14 12:01:59,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673955180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:01:59,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:01:59,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:01:59,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867164919] [2024-06-14 12:01:59,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:01:59,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:01:59,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:01:59,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:01:59,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:01:59,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:01:59,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 199 transitions, 1978 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:01:59,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:01:59,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:01:59,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:03,296 INFO L124 PetriNetUnfolderBase]: 12799/17967 cut-off events. [2024-06-14 12:02:03,297 INFO L125 PetriNetUnfolderBase]: For 504785/504810 co-relation queries the response was YES. [2024-06-14 12:02:03,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107562 conditions, 17967 events. 12799/17967 cut-off events. For 504785/504810 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 101541 event pairs, 4929 based on Foata normal form. 32/17967 useless extension candidates. Maximal degree in co-relation 107508. Up to 16617 conditions per place. [2024-06-14 12:02:03,528 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 195 selfloop transitions, 81 changer transitions 0/283 dead transitions. [2024-06-14 12:02:03,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 283 transitions, 3465 flow [2024-06-14 12:02:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 12:02:03,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-14 12:02:03,530 INFO L175 Difference]: Start difference. First operand has 128 places, 199 transitions, 1978 flow. Second operand 8 states and 211 transitions. [2024-06-14 12:02:03,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 283 transitions, 3465 flow [2024-06-14 12:02:04,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 283 transitions, 3190 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:02:04,420 INFO L231 Difference]: Finished difference. Result has 134 places, 235 transitions, 2419 flow [2024-06-14 12:02:04,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2419, PETRI_PLACES=134, PETRI_TRANSITIONS=235} [2024-06-14 12:02:04,421 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 77 predicate places. [2024-06-14 12:02:04,421 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 235 transitions, 2419 flow [2024-06-14 12:02:04,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:04,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:04,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:04,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:02:04,422 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:02:04,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1004477188, now seen corresponding path program 4 times [2024-06-14 12:02:04,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:04,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150128845] [2024-06-14 12:02:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:04,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:05,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:05,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150128845] [2024-06-14 12:02:05,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150128845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:05,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:05,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:05,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221420838] [2024-06-14 12:02:05,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:05,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:05,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:05,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:05,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:05,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:02:05,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 235 transitions, 2419 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:05,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:05,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:02:05,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:09,485 INFO L124 PetriNetUnfolderBase]: 12373/17517 cut-off events. [2024-06-14 12:02:09,486 INFO L125 PetriNetUnfolderBase]: For 562957/563191 co-relation queries the response was YES. [2024-06-14 12:02:09,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112146 conditions, 17517 events. 12373/17517 cut-off events. For 562957/563191 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 102334 event pairs, 4204 based on Foata normal form. 172/17655 useless extension candidates. Maximal degree in co-relation 112087. Up to 15784 conditions per place. [2024-06-14 12:02:09,685 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 161 selfloop transitions, 123 changer transitions 0/293 dead transitions. [2024-06-14 12:02:09,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 293 transitions, 3425 flow [2024-06-14 12:02:09,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-14 12:02:09,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-06-14 12:02:09,687 INFO L175 Difference]: Start difference. First operand has 134 places, 235 transitions, 2419 flow. Second operand 8 states and 229 transitions. [2024-06-14 12:02:09,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 293 transitions, 3425 flow [2024-06-14 12:02:10,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 293 transitions, 3351 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-14 12:02:10,623 INFO L231 Difference]: Finished difference. Result has 141 places, 239 transitions, 2708 flow [2024-06-14 12:02:10,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2708, PETRI_PLACES=141, PETRI_TRANSITIONS=239} [2024-06-14 12:02:10,624 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 84 predicate places. [2024-06-14 12:02:10,624 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 239 transitions, 2708 flow [2024-06-14 12:02:10,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:10,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:10,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:10,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:02:10,625 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:02:10,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1004329318, now seen corresponding path program 5 times [2024-06-14 12:02:10,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:10,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772352847] [2024-06-14 12:02:10,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:10,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:11,835 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 12:02:11,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:11,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772352847] [2024-06-14 12:02:11,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772352847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:11,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:11,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:11,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372616334] [2024-06-14 12:02:11,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:11,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:11,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:11,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:11,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:11,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:02:11,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 239 transitions, 2708 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:11,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:11,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:02:11,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:15,569 INFO L124 PetriNetUnfolderBase]: 12612/17909 cut-off events. [2024-06-14 12:02:15,569 INFO L125 PetriNetUnfolderBase]: For 609850/610023 co-relation queries the response was YES. [2024-06-14 12:02:15,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116390 conditions, 17909 events. 12612/17909 cut-off events. For 609850/610023 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 105360 event pairs, 4567 based on Foata normal form. 159/18048 useless extension candidates. Maximal degree in co-relation 116328. Up to 16448 conditions per place. [2024-06-14 12:02:15,888 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 163 selfloop transitions, 119 changer transitions 0/291 dead transitions. [2024-06-14 12:02:15,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 291 transitions, 3508 flow [2024-06-14 12:02:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:15,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-14 12:02:15,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-06-14 12:02:15,890 INFO L175 Difference]: Start difference. First operand has 141 places, 239 transitions, 2708 flow. Second operand 8 states and 223 transitions. [2024-06-14 12:02:15,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 291 transitions, 3508 flow [2024-06-14 12:02:16,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 291 transitions, 3334 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 12:02:16,716 INFO L231 Difference]: Finished difference. Result has 145 places, 241 transitions, 2844 flow [2024-06-14 12:02:16,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2844, PETRI_PLACES=145, PETRI_TRANSITIONS=241} [2024-06-14 12:02:16,717 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 88 predicate places. [2024-06-14 12:02:16,717 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 241 transitions, 2844 flow [2024-06-14 12:02:16,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:16,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:16,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:16,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:02:16,717 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:02:16,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash -852331842, now seen corresponding path program 6 times [2024-06-14 12:02:16,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:16,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761825517] [2024-06-14 12:02:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:16,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:18,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:18,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761825517] [2024-06-14 12:02:18,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761825517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:18,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:18,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:02:18,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035066050] [2024-06-14 12:02:18,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:18,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:02:18,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:18,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:02:18,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:02:18,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:02:18,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 241 transitions, 2844 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:18,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:18,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:02:18,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:22,034 INFO L124 PetriNetUnfolderBase]: 12718/18061 cut-off events. [2024-06-14 12:02:22,034 INFO L125 PetriNetUnfolderBase]: For 647684/647832 co-relation queries the response was YES. [2024-06-14 12:02:22,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119228 conditions, 18061 events. 12718/18061 cut-off events. For 647684/647832 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 106474 event pairs, 4586 based on Foata normal form. 118/18163 useless extension candidates. Maximal degree in co-relation 119164. Up to 16618 conditions per place. [2024-06-14 12:02:22,219 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 173 selfloop transitions, 117 changer transitions 0/299 dead transitions. [2024-06-14 12:02:22,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 299 transitions, 3680 flow [2024-06-14 12:02:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:02:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:02:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-14 12:02:22,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041152263374485 [2024-06-14 12:02:22,221 INFO L175 Difference]: Start difference. First operand has 145 places, 241 transitions, 2844 flow. Second operand 9 states and 245 transitions. [2024-06-14 12:02:22,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 299 transitions, 3680 flow [2024-06-14 12:02:22,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 299 transitions, 3418 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:02:22,979 INFO L231 Difference]: Finished difference. Result has 148 places, 243 transitions, 2890 flow [2024-06-14 12:02:22,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2890, PETRI_PLACES=148, PETRI_TRANSITIONS=243} [2024-06-14 12:02:22,980 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 91 predicate places. [2024-06-14 12:02:22,980 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 243 transitions, 2890 flow [2024-06-14 12:02:22,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:22,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:22,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:22,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:02:22,981 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:02:22,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:22,981 INFO L85 PathProgramCache]: Analyzing trace with hash 634497904, now seen corresponding path program 2 times [2024-06-14 12:02:22,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:22,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467267276] [2024-06-14 12:02:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:22,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:24,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:24,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467267276] [2024-06-14 12:02:24,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467267276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:24,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:24,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:02:24,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807782479] [2024-06-14 12:02:24,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:24,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:02:24,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:02:24,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:02:24,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:02:24,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 243 transitions, 2890 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:24,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:24,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:02:24,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:28,041 INFO L124 PetriNetUnfolderBase]: 13552/19118 cut-off events. [2024-06-14 12:02:28,041 INFO L125 PetriNetUnfolderBase]: For 684800/684819 co-relation queries the response was YES. [2024-06-14 12:02:28,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125351 conditions, 19118 events. 13552/19118 cut-off events. For 684800/684819 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 109857 event pairs, 5110 based on Foata normal form. 26/19112 useless extension candidates. Maximal degree in co-relation 125286. Up to 17622 conditions per place. [2024-06-14 12:02:28,211 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 201 selfloop transitions, 88 changer transitions 0/296 dead transitions. [2024-06-14 12:02:28,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 296 transitions, 4163 flow [2024-06-14 12:02:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:02:28,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:02:28,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:02:28,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-14 12:02:28,213 INFO L175 Difference]: Start difference. First operand has 148 places, 243 transitions, 2890 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:02:28,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 296 transitions, 4163 flow [2024-06-14 12:02:29,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 296 transitions, 3895 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 12:02:29,302 INFO L231 Difference]: Finished difference. Result has 151 places, 255 transitions, 3053 flow [2024-06-14 12:02:29,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3053, PETRI_PLACES=151, PETRI_TRANSITIONS=255} [2024-06-14 12:02:29,302 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 94 predicate places. [2024-06-14 12:02:29,302 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 255 transitions, 3053 flow [2024-06-14 12:02:29,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:29,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:29,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:29,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:02:29,303 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:02:29,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:29,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1628872264, now seen corresponding path program 7 times [2024-06-14 12:02:29,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:29,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215330031] [2024-06-14 12:02:29,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:29,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:30,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:30,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215330031] [2024-06-14 12:02:30,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215330031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:30,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:30,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:02:30,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894350055] [2024-06-14 12:02:30,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:30,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:02:30,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:30,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:02:30,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:02:30,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:02:30,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 255 transitions, 3053 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:30,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:30,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:02:30,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:02:34,091 INFO L124 PetriNetUnfolderBase]: 12923/18317 cut-off events. [2024-06-14 12:02:34,092 INFO L125 PetriNetUnfolderBase]: For 721736/721894 co-relation queries the response was YES. [2024-06-14 12:02:34,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123434 conditions, 18317 events. 12923/18317 cut-off events. For 721736/721894 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 107976 event pairs, 4940 based on Foata normal form. 118/18400 useless extension candidates. Maximal degree in co-relation 123366. Up to 16939 conditions per place. [2024-06-14 12:02:34,292 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 182 selfloop transitions, 119 changer transitions 0/310 dead transitions. [2024-06-14 12:02:34,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 310 transitions, 3909 flow [2024-06-14 12:02:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:02:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:02:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-14 12:02:34,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:02:34,293 INFO L175 Difference]: Start difference. First operand has 151 places, 255 transitions, 3053 flow. Second operand 9 states and 243 transitions. [2024-06-14 12:02:34,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 310 transitions, 3909 flow [2024-06-14 12:02:35,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 310 transitions, 3775 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 12:02:35,322 INFO L231 Difference]: Finished difference. Result has 157 places, 257 transitions, 3235 flow [2024-06-14 12:02:35,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3235, PETRI_PLACES=157, PETRI_TRANSITIONS=257} [2024-06-14 12:02:35,322 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 100 predicate places. [2024-06-14 12:02:35,322 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 257 transitions, 3235 flow [2024-06-14 12:02:35,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:35,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:02:35,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:02:35,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:02:35,323 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:02:35,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:02:35,323 INFO L85 PathProgramCache]: Analyzing trace with hash 624538108, now seen corresponding path program 8 times [2024-06-14 12:02:35,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:02:35,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679643590] [2024-06-14 12:02:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:02:35,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:02:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:02:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:02:36,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:02:36,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679643590] [2024-06-14 12:02:36,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679643590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:02:36,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:02:36,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:02:36,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935207023] [2024-06-14 12:02:36,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:02:36,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:02:36,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:02:36,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:02:36,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:02:36,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:02:36,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 257 transitions, 3235 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:02:36,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:02:36,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:02:36,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand