./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_power.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/thin002_power.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/thin002_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/thin002_power.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 13:37:26,490 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:37:26,562 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:37:26,565 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:37:26,565 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:37:26,579 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:37:26,580 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:37:26,580 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:37:26,580 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:37:26,581 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:37:26,581 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:37:26,581 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:37:26,582 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:37:26,582 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:37:26,582 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:37:26,583 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:37:26,583 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:37:26,583 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:37:26,584 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:37:26,584 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:37:26,584 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:37:26,585 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:37:26,585 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:37:26,585 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:37:26,586 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:37:26,586 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:37:26,586 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:37:26,586 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:37:26,587 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:37:26,587 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:37:26,587 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:37:26,588 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:37:26,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:37:26,588 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:37:26,588 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:37:26,589 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:37:26,589 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:37:26,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:37:26,589 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:37:26,590 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:37:26,590 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:37:26,590 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:37:26,591 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:37:26,591 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:37:26,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:37:26,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:37:26,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:37:26,858 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:37:26,858 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:37:26,859 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_power.opt.i [2024-06-14 13:37:27,988 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:37:28,206 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:37:28,206 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_power.opt.i [2024-06-14 13:37:28,219 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede7d47af/b0eeec8c35d9496a8d61a6dd5a67eb78/FLAG383bd7ab3 [2024-06-14 13:37:28,231 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ede7d47af/b0eeec8c35d9496a8d61a6dd5a67eb78 [2024-06-14 13:37:28,234 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:37:28,235 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:37:28,236 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/thin002_power.opt.yml/witness.yml [2024-06-14 13:37:28,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:37:28,469 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:37:28,470 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:37:28,470 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:37:28,473 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:37:28,474 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:37:28" (1/2) ... [2024-06-14 13:37:28,475 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@440a80a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:37:28, skipping insertion in model container [2024-06-14 13:37:28,475 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:37:28" (1/2) ... [2024-06-14 13:37:28,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4b640bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:37:28, skipping insertion in model container [2024-06-14 13:37:28,476 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:37:28" (2/2) ... [2024-06-14 13:37:28,477 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@440a80a9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:28, skipping insertion in model container [2024-06-14 13:37:28,477 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:37:28" (2/2) ... [2024-06-14 13:37:28,477 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:37:28,679 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:37:28,680 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] (((((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p3_EAX$mem_tmp == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p3_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || __unbuffered_p3_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0 == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p3_EAX$read_delayed_var && *__unbuffered_p3_EAX$read_delayed_var <= 1) && __unbuffered_p3_EAX$read_delayed_var == & z) && (*__unbuffered_p3_EAX$read_delayed_var == 0 || *__unbuffered_p3_EAX$read_delayed_var == 1))))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-14 13:37:28,681 INFO L97 edCorrectnessWitness]: Location invariant before [L882-L882] (((((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p3_EAX$mem_tmp == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p3_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || __unbuffered_p3_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0 == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p3_EAX$read_delayed_var && *__unbuffered_p3_EAX$read_delayed_var <= 1) && __unbuffered_p3_EAX$read_delayed_var == & z) && (*__unbuffered_p3_EAX$read_delayed_var == 0 || *__unbuffered_p3_EAX$read_delayed_var == 1))))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-14 13:37:28,681 INFO L97 edCorrectnessWitness]: Location invariant before [L880-L880] (((((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p3_EAX$mem_tmp == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p3_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || __unbuffered_p3_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0 == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p3_EAX$read_delayed_var && *__unbuffered_p3_EAX$read_delayed_var <= 1) && __unbuffered_p3_EAX$read_delayed_var == & z) && (*__unbuffered_p3_EAX$read_delayed_var == 0 || *__unbuffered_p3_EAX$read_delayed_var == 1))))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-14 13:37:28,681 INFO L97 edCorrectnessWitness]: Location invariant before [L883-L883] (((((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p3_EAX$mem_tmp == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p3_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || __unbuffered_p3_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0 == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p3_EAX$read_delayed_var && *__unbuffered_p3_EAX$read_delayed_var <= 1) && __unbuffered_p3_EAX$read_delayed_var == & z) && (*__unbuffered_p3_EAX$read_delayed_var == 0 || *__unbuffered_p3_EAX$read_delayed_var == 1))))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-14 13:37:28,681 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:37:28,682 INFO L106 edCorrectnessWitness]: ghost_update [L876-L876] multithreaded = 1; [2024-06-14 13:37:28,717 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:37:29,030 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:37:29,048 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:37:29,177 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:37:29,206 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:37:29,207 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29 WrapperNode [2024-06-14 13:37:29,207 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:37:29,208 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:37:29,208 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:37:29,208 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:37:29,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29" (1/1) ... [2024-06-14 13:37:29,230 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29" (1/1) ... [2024-06-14 13:37:29,260 INFO L138 Inliner]: procedures = 176, calls = 101, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 295 [2024-06-14 13:37:29,260 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:37:29,261 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:37:29,261 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:37:29,261 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:37:29,269 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29" (1/1) ... [2024-06-14 13:37:29,270 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29" (1/1) ... [2024-06-14 13:37:29,274 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29" (1/1) ... [2024-06-14 13:37:29,295 INFO L175 MemorySlicer]: Split 50 memory accesses to 2 slices as follows [2, 48]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-14 13:37:29,308 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29" (1/1) ... [2024-06-14 13:37:29,308 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29" (1/1) ... [2024-06-14 13:37:29,319 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29" (1/1) ... [2024-06-14 13:37:29,321 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29" (1/1) ... [2024-06-14 13:37:29,334 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29" (1/1) ... [2024-06-14 13:37:29,338 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29" (1/1) ... [2024-06-14 13:37:29,349 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:37:29,350 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:37:29,351 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:37:29,351 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:37:29,352 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29" (1/1) ... [2024-06-14 13:37:29,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:37:29,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:37:29,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:37:29,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:37:29,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:37:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:37:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:37:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:37:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:37:29,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:37:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:37:29,431 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:37:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:37:29,431 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:37:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:37:29,431 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:37:29,431 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 13:37:29,432 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 13:37:29,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:37:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:37:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:37:29,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:37:29,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:37:29,435 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:37:29,581 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:37:29,583 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:37:29,998 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:37:29,998 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:37:30,435 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:37:30,435 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:37:30,436 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:37:30 BoogieIcfgContainer [2024-06-14 13:37:30,436 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:37:30,438 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:37:30,438 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:37:30,440 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:37:30,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:37:28" (1/4) ... [2024-06-14 13:37:30,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fab922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:37:30, skipping insertion in model container [2024-06-14 13:37:30,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:37:28" (2/4) ... [2024-06-14 13:37:30,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fab922 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:37:30, skipping insertion in model container [2024-06-14 13:37:30,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:37:29" (3/4) ... [2024-06-14 13:37:30,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fab922 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:37:30, skipping insertion in model container [2024-06-14 13:37:30,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:37:30" (4/4) ... [2024-06-14 13:37:30,443 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_power.opt.i [2024-06-14 13:37:30,456 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:37:30,456 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 13:37:30,457 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:37:30,563 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:37:30,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 55 transitions, 126 flow [2024-06-14 13:37:30,631 INFO L124 PetriNetUnfolderBase]: 0/51 cut-off events. [2024-06-14 13:37:30,632 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:37:30,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 51 events. 0/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:37:30,634 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 55 transitions, 126 flow [2024-06-14 13:37:30,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 45 transitions, 102 flow [2024-06-14 13:37:30,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:37:30,649 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;@7d5e964c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:37:30,649 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 13:37:30,654 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:37:30,654 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:37:30,654 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:37:30,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:30,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:37:30,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:30,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:30,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1593755618, now seen corresponding path program 1 times [2024-06-14 13:37:30,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:30,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247247250] [2024-06-14 13:37:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:30,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:32,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:32,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247247250] [2024-06-14 13:37:32,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247247250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:32,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:32,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:37:32,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583602420] [2024-06-14 13:37:32,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:32,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:37:32,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:32,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:37:32,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:37:32,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-06-14 13:37:32,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:32,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:32,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-06-14 13:37:32,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:34,477 INFO L124 PetriNetUnfolderBase]: 5078/7079 cut-off events. [2024-06-14 13:37:34,477 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2024-06-14 13:37:34,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14304 conditions, 7079 events. 5078/7079 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37888 event pairs, 3622 based on Foata normal form. 1/6978 useless extension candidates. Maximal degree in co-relation 14288. Up to 7001 conditions per place. [2024-06-14 13:37:34,526 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 48 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-06-14 13:37:34,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 62 transitions, 251 flow [2024-06-14 13:37:34,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:37:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:37:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-14 13:37:34,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-06-14 13:37:34,537 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 102 flow. Second operand 3 states and 96 transitions. [2024-06-14 13:37:34,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 62 transitions, 251 flow [2024-06-14 13:37:34,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 62 transitions, 244 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:37:34,551 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 137 flow [2024-06-14 13:37:34,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-14 13:37:34,556 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2024-06-14 13:37:34,556 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 137 flow [2024-06-14 13:37:34,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:34,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:34,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:34,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:37:34,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:34,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:34,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1288537603, now seen corresponding path program 1 times [2024-06-14 13:37:34,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:34,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239872544] [2024-06-14 13:37:34,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:34,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:36,608 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 13:37:36,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:36,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239872544] [2024-06-14 13:37:36,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239872544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:36,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:36,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:37:36,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783529953] [2024-06-14 13:37:36,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:36,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:37:36,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:36,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:37:36,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:37:36,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:37:36,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:36,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:36,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:37:36,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:38,768 INFO L124 PetriNetUnfolderBase]: 8198/11284 cut-off events. [2024-06-14 13:37:38,768 INFO L125 PetriNetUnfolderBase]: For 2074/2087 co-relation queries the response was YES. [2024-06-14 13:37:38,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25899 conditions, 11284 events. 8198/11284 cut-off events. For 2074/2087 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 59431 event pairs, 4492 based on Foata normal form. 9/11287 useless extension candidates. Maximal degree in co-relation 25884. Up to 11138 conditions per place. [2024-06-14 13:37:38,821 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 68 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2024-06-14 13:37:38,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 386 flow [2024-06-14 13:37:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:37:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:37:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-14 13:37:38,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 13:37:38,826 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 137 flow. Second operand 4 states and 121 transitions. [2024-06-14 13:37:38,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 386 flow [2024-06-14 13:37:38,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 84 transitions, 378 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:37:38,831 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 208 flow [2024-06-14 13:37:38,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-14 13:37:38,832 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2024-06-14 13:37:38,832 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 208 flow [2024-06-14 13:37:38,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:38,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:38,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:38,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:37:38,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:38,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:38,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1779084262, now seen corresponding path program 1 times [2024-06-14 13:37:38,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:38,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393629000] [2024-06-14 13:37:38,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:38,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:41,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:41,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393629000] [2024-06-14 13:37:41,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393629000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:41,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:41,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:37:41,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451670685] [2024-06-14 13:37:41,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:41,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:37:41,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:41,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:37:41,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:37:41,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:37:41,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 208 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:41,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:41,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:37:41,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:43,725 INFO L124 PetriNetUnfolderBase]: 8182/11260 cut-off events. [2024-06-14 13:37:43,725 INFO L125 PetriNetUnfolderBase]: For 5710/5757 co-relation queries the response was YES. [2024-06-14 13:37:43,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28864 conditions, 11260 events. 8182/11260 cut-off events. For 5710/5757 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 59307 event pairs, 3651 based on Foata normal form. 27/11281 useless extension candidates. Maximal degree in co-relation 28846. Up to 11060 conditions per place. [2024-06-14 13:37:43,779 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 77 selfloop transitions, 12 changer transitions 0/96 dead transitions. [2024-06-14 13:37:43,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 96 transitions, 486 flow [2024-06-14 13:37:43,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:37:43,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:37:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-14 13:37:43,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236363636363637 [2024-06-14 13:37:43,782 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 208 flow. Second operand 5 states and 144 transitions. [2024-06-14 13:37:43,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 96 transitions, 486 flow [2024-06-14 13:37:43,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 96 transitions, 482 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 13:37:43,785 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 254 flow [2024-06-14 13:37:43,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-06-14 13:37:43,786 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 7 predicate places. [2024-06-14 13:37:43,786 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 254 flow [2024-06-14 13:37:43,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:43,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:43,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:43,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:37:43,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:43,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:43,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1830129936, now seen corresponding path program 1 times [2024-06-14 13:37:43,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:43,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646674420] [2024-06-14 13:37:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:43,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:46,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:46,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646674420] [2024-06-14 13:37:46,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646674420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:46,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:46,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:37:46,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296406409] [2024-06-14 13:37:46,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:46,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:37:46,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:46,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:37:46,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:37:46,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:37:46,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:46,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:46,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:37:46,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:48,212 INFO L124 PetriNetUnfolderBase]: 7742/10654 cut-off events. [2024-06-14 13:37:48,212 INFO L125 PetriNetUnfolderBase]: For 9947/9950 co-relation queries the response was YES. [2024-06-14 13:37:48,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29732 conditions, 10654 events. 7742/10654 cut-off events. For 9947/9950 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 57027 event pairs, 4216 based on Foata normal form. 5/10655 useless extension candidates. Maximal degree in co-relation 29711. Up to 10539 conditions per place. [2024-06-14 13:37:48,261 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 73 selfloop transitions, 12 changer transitions 0/92 dead transitions. [2024-06-14 13:37:48,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 538 flow [2024-06-14 13:37:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:37:48,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:37:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 13:37:48,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581818181818182 [2024-06-14 13:37:48,263 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 254 flow. Second operand 5 states and 126 transitions. [2024-06-14 13:37:48,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 538 flow [2024-06-14 13:37:48,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 92 transitions, 502 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:37:48,267 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 333 flow [2024-06-14 13:37:48,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-14 13:37:48,268 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2024-06-14 13:37:48,268 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 333 flow [2024-06-14 13:37:48,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:48,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:48,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:48,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:37:48,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:48,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:48,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1078715669, now seen corresponding path program 1 times [2024-06-14 13:37:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:48,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234144933] [2024-06-14 13:37:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:48,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:50,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:50,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234144933] [2024-06-14 13:37:50,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234144933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:50,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:50,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:50,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026661229] [2024-06-14 13:37:50,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:50,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:50,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:50,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:50,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:50,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:37:50,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 333 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:50,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:50,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:37:50,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:53,510 INFO L124 PetriNetUnfolderBase]: 9515/13113 cut-off events. [2024-06-14 13:37:53,510 INFO L125 PetriNetUnfolderBase]: For 19794/19962 co-relation queries the response was YES. [2024-06-14 13:37:53,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39965 conditions, 13113 events. 9515/13113 cut-off events. For 19794/19962 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 70690 event pairs, 4351 based on Foata normal form. 63/13135 useless extension candidates. Maximal degree in co-relation 39941. Up to 12789 conditions per place. [2024-06-14 13:37:53,569 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 81 selfloop transitions, 26 changer transitions 0/116 dead transitions. [2024-06-14 13:37:53,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 116 transitions, 717 flow [2024-06-14 13:37:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:37:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:37:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-14 13:37:53,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-14 13:37:53,571 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 333 flow. Second operand 6 states and 159 transitions. [2024-06-14 13:37:53,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 116 transitions, 717 flow [2024-06-14 13:37:53,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 116 transitions, 707 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-14 13:37:53,580 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 446 flow [2024-06-14 13:37:53,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=446, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-06-14 13:37:53,580 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 15 predicate places. [2024-06-14 13:37:53,581 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 446 flow [2024-06-14 13:37:53,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:53,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:53,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:53,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:37:53,581 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:53,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:53,582 INFO L85 PathProgramCache]: Analyzing trace with hash -477950733, now seen corresponding path program 2 times [2024-06-14 13:37:53,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:53,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376431150] [2024-06-14 13:37:53,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:53,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:55,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:55,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376431150] [2024-06-14 13:37:55,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376431150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:55,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:55,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:37:55,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449601375] [2024-06-14 13:37:55,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:55,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:37:55,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:55,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:37:55,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:37:55,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:37:55,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 446 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:55,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:55,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:37:55,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:58,160 INFO L124 PetriNetUnfolderBase]: 9506/13101 cut-off events. [2024-06-14 13:37:58,160 INFO L125 PetriNetUnfolderBase]: For 30756/30964 co-relation queries the response was YES. [2024-06-14 13:37:58,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43714 conditions, 13101 events. 9506/13101 cut-off events. For 30756/30964 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 70554 event pairs, 4351 based on Foata normal form. 72/13134 useless extension candidates. Maximal degree in co-relation 43687. Up to 12799 conditions per place. [2024-06-14 13:37:58,270 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 73 selfloop transitions, 22 changer transitions 0/104 dead transitions. [2024-06-14 13:37:58,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 104 transitions, 702 flow [2024-06-14 13:37:58,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:37:58,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:37:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-14 13:37:58,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-06-14 13:37:58,286 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 446 flow. Second operand 5 states and 132 transitions. [2024-06-14 13:37:58,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 104 transitions, 702 flow [2024-06-14 13:37:58,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 657 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 13:37:58,312 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 463 flow [2024-06-14 13:37:58,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=463, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2024-06-14 13:37:58,313 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 18 predicate places. [2024-06-14 13:37:58,313 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 463 flow [2024-06-14 13:37:58,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:58,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:58,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:58,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:37:58,314 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:37:58,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:58,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1710667571, now seen corresponding path program 1 times [2024-06-14 13:37:58,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:58,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821217670] [2024-06-14 13:37:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:58,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:01,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:01,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821217670] [2024-06-14 13:38:01,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821217670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:01,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:01,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:38:01,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727370618] [2024-06-14 13:38:01,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:01,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:38:01,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:01,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:38:01,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:38:01,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:38:01,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 463 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:01,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:01,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:38:01,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:03,857 INFO L124 PetriNetUnfolderBase]: 7757/10684 cut-off events. [2024-06-14 13:38:03,857 INFO L125 PetriNetUnfolderBase]: For 28363/28374 co-relation queries the response was YES. [2024-06-14 13:38:03,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36510 conditions, 10684 events. 7757/10684 cut-off events. For 28363/28374 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 57562 event pairs, 3902 based on Foata normal form. 14/10694 useless extension candidates. Maximal degree in co-relation 36481. Up to 10521 conditions per place. [2024-06-14 13:38:03,917 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 91 selfloop transitions, 15 changer transitions 0/113 dead transitions. [2024-06-14 13:38:03,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 113 transitions, 780 flow [2024-06-14 13:38:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:38:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:38:03,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 13:38:03,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 13:38:03,919 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 463 flow. Second operand 6 states and 150 transitions. [2024-06-14 13:38:03,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 113 transitions, 780 flow [2024-06-14 13:38:03,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 113 transitions, 736 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:38:03,933 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 487 flow [2024-06-14 13:38:03,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=487, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-14 13:38:03,934 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-06-14 13:38:03,934 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 487 flow [2024-06-14 13:38:03,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:03,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:03,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:03,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:38:03,935 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:03,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:03,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1901195731, now seen corresponding path program 1 times [2024-06-14 13:38:03,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:03,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169481299] [2024-06-14 13:38:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:03,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:06,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:06,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169481299] [2024-06-14 13:38:06,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169481299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:06,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:06,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:06,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981733133] [2024-06-14 13:38:06,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:06,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:06,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:06,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:06,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:06,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:38:06,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 487 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:06,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:06,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:38:06,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:09,413 INFO L124 PetriNetUnfolderBase]: 9864/13515 cut-off events. [2024-06-14 13:38:09,413 INFO L125 PetriNetUnfolderBase]: For 43750/43782 co-relation queries the response was YES. [2024-06-14 13:38:09,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47757 conditions, 13515 events. 9864/13515 cut-off events. For 43750/43782 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 70899 event pairs, 4485 based on Foata normal form. 25/13531 useless extension candidates. Maximal degree in co-relation 47727. Up to 13175 conditions per place. [2024-06-14 13:38:09,481 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 113 selfloop transitions, 28 changer transitions 0/147 dead transitions. [2024-06-14 13:38:09,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 147 transitions, 1059 flow [2024-06-14 13:38:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:38:09,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:38:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 13:38:09,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649350649350649 [2024-06-14 13:38:09,484 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 487 flow. Second operand 7 states and 179 transitions. [2024-06-14 13:38:09,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 147 transitions, 1059 flow [2024-06-14 13:38:09,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 147 transitions, 1017 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:38:09,500 INFO L231 Difference]: Finished difference. Result has 83 places, 97 transitions, 675 flow [2024-06-14 13:38:09,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=83, PETRI_TRANSITIONS=97} [2024-06-14 13:38:09,500 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 25 predicate places. [2024-06-14 13:38:09,500 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 97 transitions, 675 flow [2024-06-14 13:38:09,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:09,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:09,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:09,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:38:09,501 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:09,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:09,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1931563425, now seen corresponding path program 2 times [2024-06-14 13:38:09,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:09,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037063861] [2024-06-14 13:38:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:09,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:11,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:11,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037063861] [2024-06-14 13:38:11,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037063861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:11,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:11,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:11,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399421725] [2024-06-14 13:38:11,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:11,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:11,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:11,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:11,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:11,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:38:11,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 97 transitions, 675 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:11,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:11,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:38:11,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:14,872 INFO L124 PetriNetUnfolderBase]: 9891/13572 cut-off events. [2024-06-14 13:38:14,873 INFO L125 PetriNetUnfolderBase]: For 56910/56976 co-relation queries the response was YES. [2024-06-14 13:38:14,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51335 conditions, 13572 events. 9891/13572 cut-off events. For 56910/56976 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 71538 event pairs, 4457 based on Foata normal form. 50/13617 useless extension candidates. Maximal degree in co-relation 51302. Up to 13241 conditions per place. [2024-06-14 13:38:14,958 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 129 selfloop transitions, 27 changer transitions 0/162 dead transitions. [2024-06-14 13:38:14,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 162 transitions, 1236 flow [2024-06-14 13:38:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:38:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:38:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 13:38:14,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-14 13:38:14,960 INFO L175 Difference]: Start difference. First operand has 83 places, 97 transitions, 675 flow. Second operand 8 states and 201 transitions. [2024-06-14 13:38:14,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 162 transitions, 1236 flow [2024-06-14 13:38:14,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 162 transitions, 1180 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 13:38:14,998 INFO L231 Difference]: Finished difference. Result has 89 places, 103 transitions, 751 flow [2024-06-14 13:38:14,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=751, PETRI_PLACES=89, PETRI_TRANSITIONS=103} [2024-06-14 13:38:14,998 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 31 predicate places. [2024-06-14 13:38:14,998 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 103 transitions, 751 flow [2024-06-14 13:38:14,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:14,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:14,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:14,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:38:14,999 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:14,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:15,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1931569005, now seen corresponding path program 3 times [2024-06-14 13:38:15,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:15,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623016498] [2024-06-14 13:38:15,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:15,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:17,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:17,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:17,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623016498] [2024-06-14 13:38:17,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623016498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:17,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:17,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:17,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417340046] [2024-06-14 13:38:17,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:17,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:17,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:17,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:17,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:17,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:38:17,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 103 transitions, 751 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:17,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:17,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:38:17,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:20,161 INFO L124 PetriNetUnfolderBase]: 9882/13550 cut-off events. [2024-06-14 13:38:20,162 INFO L125 PetriNetUnfolderBase]: For 64574/64617 co-relation queries the response was YES. [2024-06-14 13:38:20,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51929 conditions, 13550 events. 9882/13550 cut-off events. For 64574/64617 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 71417 event pairs, 4485 based on Foata normal form. 33/13574 useless extension candidates. Maximal degree in co-relation 51894. Up to 13232 conditions per place. [2024-06-14 13:38:20,235 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 108 selfloop transitions, 26 changer transitions 0/140 dead transitions. [2024-06-14 13:38:20,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 140 transitions, 1112 flow [2024-06-14 13:38:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:38:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:38:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 13:38:20,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-14 13:38:20,237 INFO L175 Difference]: Start difference. First operand has 89 places, 103 transitions, 751 flow. Second operand 6 states and 153 transitions. [2024-06-14 13:38:20,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 140 transitions, 1112 flow [2024-06-14 13:38:20,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 140 transitions, 1018 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:38:20,282 INFO L231 Difference]: Finished difference. Result has 90 places, 103 transitions, 720 flow [2024-06-14 13:38:20,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=720, PETRI_PLACES=90, PETRI_TRANSITIONS=103} [2024-06-14 13:38:20,283 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 32 predicate places. [2024-06-14 13:38:20,283 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 103 transitions, 720 flow [2024-06-14 13:38:20,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:20,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:20,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:20,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:38:20,283 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:20,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:20,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1195334542, now seen corresponding path program 1 times [2024-06-14 13:38:20,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:20,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626514822] [2024-06-14 13:38:20,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:20,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:22,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:22,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626514822] [2024-06-14 13:38:22,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626514822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:22,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:22,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:22,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497314305] [2024-06-14 13:38:22,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:22,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:22,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:22,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:38:22,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 103 transitions, 720 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:22,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:22,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:38:22,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:25,628 INFO L124 PetriNetUnfolderBase]: 9643/13305 cut-off events. [2024-06-14 13:38:25,628 INFO L125 PetriNetUnfolderBase]: For 83395/83499 co-relation queries the response was YES. [2024-06-14 13:38:25,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53084 conditions, 13305 events. 9643/13305 cut-off events. For 83395/83499 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 72084 event pairs, 3313 based on Foata normal form. 60/13094 useless extension candidates. Maximal degree in co-relation 53048. Up to 12625 conditions per place. [2024-06-14 13:38:25,720 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 102 selfloop transitions, 42 changer transitions 0/159 dead transitions. [2024-06-14 13:38:25,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 159 transitions, 1252 flow [2024-06-14 13:38:25,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:38:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:38:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 13:38:25,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779220779220779 [2024-06-14 13:38:25,723 INFO L175 Difference]: Start difference. First operand has 90 places, 103 transitions, 720 flow. Second operand 7 states and 184 transitions. [2024-06-14 13:38:25,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 159 transitions, 1252 flow [2024-06-14 13:38:25,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 159 transitions, 1200 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:38:25,797 INFO L231 Difference]: Finished difference. Result has 92 places, 109 transitions, 832 flow [2024-06-14 13:38:25,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=832, PETRI_PLACES=92, PETRI_TRANSITIONS=109} [2024-06-14 13:38:25,798 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 34 predicate places. [2024-06-14 13:38:25,798 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 109 transitions, 832 flow [2024-06-14 13:38:25,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:25,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:25,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:25,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:38:25,799 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:25,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:25,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1195274092, now seen corresponding path program 2 times [2024-06-14 13:38:25,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:25,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431980145] [2024-06-14 13:38:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:25,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:28,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:28,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431980145] [2024-06-14 13:38:28,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431980145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:28,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:28,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:28,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145869656] [2024-06-14 13:38:28,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:28,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:28,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:28,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:28,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:38:28,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 109 transitions, 832 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:28,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:28,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:38:28,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:31,352 INFO L124 PetriNetUnfolderBase]: 9689/13377 cut-off events. [2024-06-14 13:38:31,352 INFO L125 PetriNetUnfolderBase]: For 102638/102768 co-relation queries the response was YES. [2024-06-14 13:38:31,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56344 conditions, 13377 events. 9689/13377 cut-off events. For 102638/102768 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 72597 event pairs, 3938 based on Foata normal form. 54/13152 useless extension candidates. Maximal degree in co-relation 56307. Up to 12830 conditions per place. [2024-06-14 13:38:31,437 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 105 selfloop transitions, 38 changer transitions 0/158 dead transitions. [2024-06-14 13:38:31,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 158 transitions, 1268 flow [2024-06-14 13:38:31,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:38:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:38:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 13:38:31,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-14 13:38:31,439 INFO L175 Difference]: Start difference. First operand has 92 places, 109 transitions, 832 flow. Second operand 7 states and 180 transitions. [2024-06-14 13:38:31,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 158 transitions, 1268 flow [2024-06-14 13:38:31,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 158 transitions, 1196 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 13:38:31,496 INFO L231 Difference]: Finished difference. Result has 96 places, 112 transitions, 891 flow [2024-06-14 13:38:31,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=891, PETRI_PLACES=96, PETRI_TRANSITIONS=112} [2024-06-14 13:38:31,496 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 38 predicate places. [2024-06-14 13:38:31,497 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 112 transitions, 891 flow [2024-06-14 13:38:31,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:31,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:31,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:31,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:38:31,497 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:31,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:31,498 INFO L85 PathProgramCache]: Analyzing trace with hash 250899890, now seen corresponding path program 3 times [2024-06-14 13:38:31,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:31,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126112825] [2024-06-14 13:38:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:31,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:33,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:33,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126112825] [2024-06-14 13:38:33,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126112825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:33,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:33,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:38:33,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423012655] [2024-06-14 13:38:33,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:33,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:38:33,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:33,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:38:33,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:38:33,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:38:33,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 112 transitions, 891 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:33,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:33,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:38:33,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:36,916 INFO L124 PetriNetUnfolderBase]: 9666/13344 cut-off events. [2024-06-14 13:38:36,916 INFO L125 PetriNetUnfolderBase]: For 114016/114146 co-relation queries the response was YES. [2024-06-14 13:38:36,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57283 conditions, 13344 events. 9666/13344 cut-off events. For 114016/114146 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 72383 event pairs, 3304 based on Foata normal form. 78/13145 useless extension candidates. Maximal degree in co-relation 57244. Up to 12766 conditions per place. [2024-06-14 13:38:37,164 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 100 selfloop transitions, 34 changer transitions 0/149 dead transitions. [2024-06-14 13:38:37,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 149 transitions, 1249 flow [2024-06-14 13:38:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:38:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:38:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 13:38:37,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47575757575757577 [2024-06-14 13:38:37,168 INFO L175 Difference]: Start difference. First operand has 96 places, 112 transitions, 891 flow. Second operand 6 states and 157 transitions. [2024-06-14 13:38:37,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 149 transitions, 1249 flow [2024-06-14 13:38:37,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 149 transitions, 1150 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:38:37,237 INFO L231 Difference]: Finished difference. Result has 97 places, 112 transitions, 876 flow [2024-06-14 13:38:37,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=876, PETRI_PLACES=97, PETRI_TRANSITIONS=112} [2024-06-14 13:38:37,238 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 39 predicate places. [2024-06-14 13:38:37,238 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 112 transitions, 876 flow [2024-06-14 13:38:37,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:37,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:37,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:37,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:38:37,239 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:37,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:37,239 INFO L85 PathProgramCache]: Analyzing trace with hash 566592537, now seen corresponding path program 1 times [2024-06-14 13:38:37,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:37,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674595946] [2024-06-14 13:38:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:37,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:39,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:39,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674595946] [2024-06-14 13:38:39,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674595946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:39,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:39,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:38:39,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703479006] [2024-06-14 13:38:39,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:39,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:38:39,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:39,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:38:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:38:39,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:38:39,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 112 transitions, 876 flow. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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 13:38:39,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:39,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:38:39,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:41,413 INFO L124 PetriNetUnfolderBase]: 7463/10429 cut-off events. [2024-06-14 13:38:41,413 INFO L125 PetriNetUnfolderBase]: For 92527/92565 co-relation queries the response was YES. [2024-06-14 13:38:41,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45508 conditions, 10429 events. 7463/10429 cut-off events. For 92527/92565 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 56993 event pairs, 3495 based on Foata normal form. 39/10438 useless extension candidates. Maximal degree in co-relation 45468. Up to 10152 conditions per place. [2024-06-14 13:38:41,474 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 104 selfloop transitions, 18 changer transitions 0/134 dead transitions. [2024-06-14 13:38:41,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 134 transitions, 1200 flow [2024-06-14 13:38:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:38:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:38:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 13:38:41,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 13:38:41,476 INFO L175 Difference]: Start difference. First operand has 97 places, 112 transitions, 876 flow. Second operand 5 states and 125 transitions. [2024-06-14 13:38:41,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 134 transitions, 1200 flow [2024-06-14 13:38:41,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1121 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:38:41,522 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 887 flow [2024-06-14 13:38:41,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=887, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-14 13:38:41,522 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 39 predicate places. [2024-06-14 13:38:41,523 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 887 flow [2024-06-14 13:38:41,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 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 13:38:41,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:41,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:41,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:38:41,523 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:41,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:41,524 INFO L85 PathProgramCache]: Analyzing trace with hash 986285138, now seen corresponding path program 1 times [2024-06-14 13:38:41,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:41,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801871658] [2024-06-14 13:38:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:41,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:44,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:44,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801871658] [2024-06-14 13:38:44,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801871658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:44,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:44,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:44,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623582843] [2024-06-14 13:38:44,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:44,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:44,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:44,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:44,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:38:44,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 887 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:44,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:44,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:38:44,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:48,019 INFO L124 PetriNetUnfolderBase]: 10242/14114 cut-off events. [2024-06-14 13:38:48,019 INFO L125 PetriNetUnfolderBase]: For 134646/134689 co-relation queries the response was YES. [2024-06-14 13:38:48,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62639 conditions, 14114 events. 10242/14114 cut-off events. For 134646/134689 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 75238 event pairs, 3004 based on Foata normal form. 48/14153 useless extension candidates. Maximal degree in co-relation 62598. Up to 13090 conditions per place. [2024-06-14 13:38:48,110 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 147 selfloop transitions, 42 changer transitions 0/195 dead transitions. [2024-06-14 13:38:48,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 195 transitions, 1637 flow [2024-06-14 13:38:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:38:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:38:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 13:38:48,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-14 13:38:48,128 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 887 flow. Second operand 8 states and 207 transitions. [2024-06-14 13:38:48,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 195 transitions, 1637 flow [2024-06-14 13:38:48,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 195 transitions, 1581 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:38:48,224 INFO L231 Difference]: Finished difference. Result has 104 places, 127 transitions, 1066 flow [2024-06-14 13:38:48,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1066, PETRI_PLACES=104, PETRI_TRANSITIONS=127} [2024-06-14 13:38:48,226 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 46 predicate places. [2024-06-14 13:38:48,227 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 127 transitions, 1066 flow [2024-06-14 13:38:48,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:48,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:48,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:48,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:38:48,228 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:48,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:48,228 INFO L85 PathProgramCache]: Analyzing trace with hash 828581146, now seen corresponding path program 2 times [2024-06-14 13:38:48,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:48,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728091522] [2024-06-14 13:38:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:48,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:50,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:50,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728091522] [2024-06-14 13:38:50,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728091522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:50,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:50,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:50,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540298797] [2024-06-14 13:38:50,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:50,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:50,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:50,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:50,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:38:50,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 127 transitions, 1066 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:50,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:50,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:38:50,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:54,160 INFO L124 PetriNetUnfolderBase]: 10398/14370 cut-off events. [2024-06-14 13:38:54,161 INFO L125 PetriNetUnfolderBase]: For 156564/156607 co-relation queries the response was YES. [2024-06-14 13:38:54,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65918 conditions, 14370 events. 10398/14370 cut-off events. For 156564/156607 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 77145 event pairs, 4008 based on Foata normal form. 54/14415 useless extension candidates. Maximal degree in co-relation 65874. Up to 13782 conditions per place. [2024-06-14 13:38:54,292 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 147 selfloop transitions, 35 changer transitions 0/188 dead transitions. [2024-06-14 13:38:54,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 188 transitions, 1617 flow [2024-06-14 13:38:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:38:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:38:54,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 13:38:54,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-14 13:38:54,296 INFO L175 Difference]: Start difference. First operand has 104 places, 127 transitions, 1066 flow. Second operand 8 states and 201 transitions. [2024-06-14 13:38:54,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 188 transitions, 1617 flow [2024-06-14 13:38:54,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 188 transitions, 1558 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:38:54,422 INFO L231 Difference]: Finished difference. Result has 109 places, 129 transitions, 1123 flow [2024-06-14 13:38:54,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1123, PETRI_PLACES=109, PETRI_TRANSITIONS=129} [2024-06-14 13:38:54,422 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 51 predicate places. [2024-06-14 13:38:54,422 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 129 transitions, 1123 flow [2024-06-14 13:38:54,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:54,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:54,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:38:54,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:38:54,423 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:38:54,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:54,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1628437852, now seen corresponding path program 3 times [2024-06-14 13:38:54,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:54,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089066823] [2024-06-14 13:38:54,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:54,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:57,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:57,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089066823] [2024-06-14 13:38:57,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089066823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:57,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:57,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:57,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145613156] [2024-06-14 13:38:57,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:57,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:57,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:57,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:38:57,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 129 transitions, 1123 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:57,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:57,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:38:57,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:00,831 INFO L124 PetriNetUnfolderBase]: 10510/14542 cut-off events. [2024-06-14 13:39:00,832 INFO L125 PetriNetUnfolderBase]: For 173442/173485 co-relation queries the response was YES. [2024-06-14 13:39:00,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67996 conditions, 14542 events. 10510/14542 cut-off events. For 173442/173485 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 78371 event pairs, 3992 based on Foata normal form. 48/14581 useless extension candidates. Maximal degree in co-relation 67950. Up to 13772 conditions per place. [2024-06-14 13:39:00,913 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 150 selfloop transitions, 39 changer transitions 0/195 dead transitions. [2024-06-14 13:39:00,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 195 transitions, 1718 flow [2024-06-14 13:39:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:39:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:39:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 13:39:00,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-14 13:39:00,922 INFO L175 Difference]: Start difference. First operand has 109 places, 129 transitions, 1123 flow. Second operand 8 states and 204 transitions. [2024-06-14 13:39:00,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 195 transitions, 1718 flow [2024-06-14 13:39:01,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 195 transitions, 1636 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:01,032 INFO L231 Difference]: Finished difference. Result has 112 places, 133 transitions, 1194 flow [2024-06-14 13:39:01,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1194, PETRI_PLACES=112, PETRI_TRANSITIONS=133} [2024-06-14 13:39:01,038 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 54 predicate places. [2024-06-14 13:39:01,038 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 133 transitions, 1194 flow [2024-06-14 13:39:01,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:01,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:01,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:01,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:39:01,039 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:01,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:01,040 INFO L85 PathProgramCache]: Analyzing trace with hash -806525922, now seen corresponding path program 4 times [2024-06-14 13:39:01,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:01,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071507799] [2024-06-14 13:39:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:03,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:03,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071507799] [2024-06-14 13:39:03,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071507799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:03,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:03,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:03,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234895127] [2024-06-14 13:39:03,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:03,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:03,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:03,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:03,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:03,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:39:03,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 133 transitions, 1194 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:03,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:03,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:39:03,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:08,022 INFO L124 PetriNetUnfolderBase]: 10666/14788 cut-off events. [2024-06-14 13:39:08,022 INFO L125 PetriNetUnfolderBase]: For 193080/193141 co-relation queries the response was YES. [2024-06-14 13:39:08,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70352 conditions, 14788 events. 10666/14788 cut-off events. For 193080/193141 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 80115 event pairs, 4028 based on Foata normal form. 68/14851 useless extension candidates. Maximal degree in co-relation 70304. Up to 14228 conditions per place. [2024-06-14 13:39:08,136 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 169 selfloop transitions, 29 changer transitions 0/204 dead transitions. [2024-06-14 13:39:08,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 204 transitions, 1809 flow [2024-06-14 13:39:08,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:39:08,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:39:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-14 13:39:08,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4505050505050505 [2024-06-14 13:39:08,140 INFO L175 Difference]: Start difference. First operand has 112 places, 133 transitions, 1194 flow. Second operand 9 states and 223 transitions. [2024-06-14 13:39:08,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 204 transitions, 1809 flow [2024-06-14 13:39:08,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 204 transitions, 1748 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:39:08,397 INFO L231 Difference]: Finished difference. Result has 117 places, 135 transitions, 1245 flow [2024-06-14 13:39:08,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1245, PETRI_PLACES=117, PETRI_TRANSITIONS=135} [2024-06-14 13:39:08,400 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 59 predicate places. [2024-06-14 13:39:08,401 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 135 transitions, 1245 flow [2024-06-14 13:39:08,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:08,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:08,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:08,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:39:08,404 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:08,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:08,404 INFO L85 PathProgramCache]: Analyzing trace with hash -811888302, now seen corresponding path program 5 times [2024-06-14 13:39:08,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:08,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967682090] [2024-06-14 13:39:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:08,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:11,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:11,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967682090] [2024-06-14 13:39:11,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967682090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:11,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:11,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:11,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085203956] [2024-06-14 13:39:11,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:11,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:11,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:11,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:11,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:39:11,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 135 transitions, 1245 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:11,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:11,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:39:11,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:14,844 INFO L124 PetriNetUnfolderBase]: 10763/14949 cut-off events. [2024-06-14 13:39:14,844 INFO L125 PetriNetUnfolderBase]: For 211663/211706 co-relation queries the response was YES. [2024-06-14 13:39:14,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72234 conditions, 14949 events. 10763/14949 cut-off events. For 211663/211706 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 81227 event pairs, 4083 based on Foata normal form. 54/14994 useless extension candidates. Maximal degree in co-relation 72184. Up to 14379 conditions per place. [2024-06-14 13:39:14,948 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 153 selfloop transitions, 28 changer transitions 0/187 dead transitions. [2024-06-14 13:39:14,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 187 transitions, 1784 flow [2024-06-14 13:39:14,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:39:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:39:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 13:39:14,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623376623376623 [2024-06-14 13:39:14,952 INFO L175 Difference]: Start difference. First operand has 117 places, 135 transitions, 1245 flow. Second operand 7 states and 178 transitions. [2024-06-14 13:39:14,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 187 transitions, 1784 flow [2024-06-14 13:39:15,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 187 transitions, 1708 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:39:15,142 INFO L231 Difference]: Finished difference. Result has 117 places, 137 transitions, 1283 flow [2024-06-14 13:39:15,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1283, PETRI_PLACES=117, PETRI_TRANSITIONS=137} [2024-06-14 13:39:15,143 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 59 predicate places. [2024-06-14 13:39:15,143 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 137 transitions, 1283 flow [2024-06-14 13:39:15,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:15,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:15,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:15,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:39:15,144 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:15,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:15,145 INFO L85 PathProgramCache]: Analyzing trace with hash -812036172, now seen corresponding path program 6 times [2024-06-14 13:39:15,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:15,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899119814] [2024-06-14 13:39:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:15,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:17,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:17,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899119814] [2024-06-14 13:39:17,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899119814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:17,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:17,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:17,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559604011] [2024-06-14 13:39:17,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:17,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:17,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:17,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:17,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:17,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:39:17,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 137 transitions, 1283 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:17,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:17,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:39:17,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:21,239 INFO L124 PetriNetUnfolderBase]: 10724/14892 cut-off events. [2024-06-14 13:39:21,239 INFO L125 PetriNetUnfolderBase]: For 225696/225739 co-relation queries the response was YES. [2024-06-14 13:39:21,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72489 conditions, 14892 events. 10724/14892 cut-off events. For 225696/225739 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 80808 event pairs, 3340 based on Foata normal form. 48/14931 useless extension candidates. Maximal degree in co-relation 72438. Up to 13894 conditions per place. [2024-06-14 13:39:21,332 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 150 selfloop transitions, 36 changer transitions 0/192 dead transitions. [2024-06-14 13:39:21,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 192 transitions, 1820 flow [2024-06-14 13:39:21,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:39:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:39:21,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 13:39:21,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4701298701298701 [2024-06-14 13:39:21,334 INFO L175 Difference]: Start difference. First operand has 117 places, 137 transitions, 1283 flow. Second operand 7 states and 181 transitions. [2024-06-14 13:39:21,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 192 transitions, 1820 flow [2024-06-14 13:39:21,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 192 transitions, 1732 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:39:21,519 INFO L231 Difference]: Finished difference. Result has 120 places, 139 transitions, 1315 flow [2024-06-14 13:39:21,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1315, PETRI_PLACES=120, PETRI_TRANSITIONS=139} [2024-06-14 13:39:21,519 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 62 predicate places. [2024-06-14 13:39:21,519 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 139 transitions, 1315 flow [2024-06-14 13:39:21,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:21,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:21,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:21,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:39:21,520 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:21,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash -806310720, now seen corresponding path program 1 times [2024-06-14 13:39:21,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:21,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035177386] [2024-06-14 13:39:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:21,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:24,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:24,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035177386] [2024-06-14 13:39:24,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035177386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:24,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:24,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:39:24,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691480522] [2024-06-14 13:39:24,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:24,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:39:24,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:24,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:39:24,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:39:24,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:39:24,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 139 transitions, 1315 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:24,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:24,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:39:24,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:27,576 INFO L124 PetriNetUnfolderBase]: 10685/14845 cut-off events. [2024-06-14 13:39:27,577 INFO L125 PetriNetUnfolderBase]: For 240081/240142 co-relation queries the response was YES. [2024-06-14 13:39:27,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72943 conditions, 14845 events. 10685/14845 cut-off events. For 240081/240142 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 80529 event pairs, 3723 based on Foata normal form. 62/14902 useless extension candidates. Maximal degree in co-relation 72890. Up to 13833 conditions per place. [2024-06-14 13:39:27,688 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 171 selfloop transitions, 36 changer transitions 0/213 dead transitions. [2024-06-14 13:39:27,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 213 transitions, 1912 flow [2024-06-14 13:39:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:39:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:39:27,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-14 13:39:27,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 13:39:27,709 INFO L175 Difference]: Start difference. First operand has 120 places, 139 transitions, 1315 flow. Second operand 9 states and 225 transitions. [2024-06-14 13:39:27,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 213 transitions, 1912 flow [2024-06-14 13:39:27,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 213 transitions, 1773 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:39:27,927 INFO L231 Difference]: Finished difference. Result has 122 places, 140 transitions, 1249 flow [2024-06-14 13:39:27,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1249, PETRI_PLACES=122, PETRI_TRANSITIONS=140} [2024-06-14 13:39:27,928 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 64 predicate places. [2024-06-14 13:39:27,928 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 140 transitions, 1249 flow [2024-06-14 13:39:27,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:27,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:27,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:27,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:39:27,929 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:27,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:27,929 INFO L85 PathProgramCache]: Analyzing trace with hash 966319620, now seen corresponding path program 1 times [2024-06-14 13:39:27,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:27,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869001649] [2024-06-14 13:39:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:27,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:30,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:30,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869001649] [2024-06-14 13:39:30,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869001649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:30,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:30,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:39:30,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338299328] [2024-06-14 13:39:30,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:30,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:39:30,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:30,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:39:30,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:39:30,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:39:30,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 140 transitions, 1249 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:30,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:30,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:39:30,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:33,649 INFO L124 PetriNetUnfolderBase]: 8188/11598 cut-off events. [2024-06-14 13:39:33,650 INFO L125 PetriNetUnfolderBase]: For 208865/208874 co-relation queries the response was YES. [2024-06-14 13:39:33,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59380 conditions, 11598 events. 8188/11598 cut-off events. For 208865/208874 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65377 event pairs, 3388 based on Foata normal form. 9/11571 useless extension candidates. Maximal degree in co-relation 59327. Up to 11224 conditions per place. [2024-06-14 13:39:33,762 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 132 selfloop transitions, 22 changer transitions 0/167 dead transitions. [2024-06-14 13:39:33,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 167 transitions, 1659 flow [2024-06-14 13:39:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:39:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:39:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 13:39:33,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 13:39:33,763 INFO L175 Difference]: Start difference. First operand has 122 places, 140 transitions, 1249 flow. Second operand 6 states and 145 transitions. [2024-06-14 13:39:33,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 167 transitions, 1659 flow [2024-06-14 13:39:33,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 167 transitions, 1572 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:39:33,899 INFO L231 Difference]: Finished difference. Result has 121 places, 144 transitions, 1269 flow [2024-06-14 13:39:33,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1269, PETRI_PLACES=121, PETRI_TRANSITIONS=144} [2024-06-14 13:39:33,899 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 63 predicate places. [2024-06-14 13:39:33,900 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 144 transitions, 1269 flow [2024-06-14 13:39:33,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:33,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:33,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:33,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:39:33,900 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:33,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:33,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1142854594, now seen corresponding path program 1 times [2024-06-14 13:39:33,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:33,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580273103] [2024-06-14 13:39:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:33,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:36,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:36,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580273103] [2024-06-14 13:39:36,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580273103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:36,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:36,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:39:36,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736215837] [2024-06-14 13:39:36,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:36,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:39:36,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:36,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:39:36,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:39:36,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:39:36,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 144 transitions, 1269 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:36,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:36,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:39:36,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:39,552 INFO L124 PetriNetUnfolderBase]: 8624/12084 cut-off events. [2024-06-14 13:39:39,553 INFO L125 PetriNetUnfolderBase]: For 226299/226333 co-relation queries the response was YES. [2024-06-14 13:39:39,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63637 conditions, 12084 events. 8624/12084 cut-off events. For 226299/226333 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67268 event pairs, 3391 based on Foata normal form. 20/12098 useless extension candidates. Maximal degree in co-relation 63583. Up to 11819 conditions per place. [2024-06-14 13:39:39,638 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 148 selfloop transitions, 26 changer transitions 0/181 dead transitions. [2024-06-14 13:39:39,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 181 transitions, 1887 flow [2024-06-14 13:39:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:39:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:39:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 13:39:39,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2024-06-14 13:39:39,640 INFO L175 Difference]: Start difference. First operand has 121 places, 144 transitions, 1269 flow. Second operand 6 states and 148 transitions. [2024-06-14 13:39:39,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 181 transitions, 1887 flow [2024-06-14 13:39:39,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 181 transitions, 1812 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 13:39:39,815 INFO L231 Difference]: Finished difference. Result has 123 places, 152 transitions, 1375 flow [2024-06-14 13:39:39,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1375, PETRI_PLACES=123, PETRI_TRANSITIONS=152} [2024-06-14 13:39:39,816 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 65 predicate places. [2024-06-14 13:39:39,816 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 152 transitions, 1375 flow [2024-06-14 13:39:39,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:39,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:39,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:39,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:39:39,817 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:39,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:39,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1154532508, now seen corresponding path program 2 times [2024-06-14 13:39:39,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:39,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371506771] [2024-06-14 13:39:39,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:39,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:42,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:42,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371506771] [2024-06-14 13:39:42,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371506771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:42,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:42,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:39:42,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52126299] [2024-06-14 13:39:42,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:42,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:39:42,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:42,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:39:42,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:39:42,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:39:42,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 152 transitions, 1375 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:42,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:42,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:39:42,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:44,878 INFO L124 PetriNetUnfolderBase]: 8617/12075 cut-off events. [2024-06-14 13:39:44,879 INFO L125 PetriNetUnfolderBase]: For 251543/251584 co-relation queries the response was YES. [2024-06-14 13:39:44,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66109 conditions, 12075 events. 8617/12075 cut-off events. For 251543/251584 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67049 event pairs, 3391 based on Foata normal form. 23/12092 useless extension candidates. Maximal degree in co-relation 66054. Up to 11823 conditions per place. [2024-06-14 13:39:44,954 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 145 selfloop transitions, 22 changer transitions 0/174 dead transitions. [2024-06-14 13:39:44,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 174 transitions, 1763 flow [2024-06-14 13:39:44,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:39:44,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:39:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 13:39:44,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581818181818182 [2024-06-14 13:39:44,956 INFO L175 Difference]: Start difference. First operand has 123 places, 152 transitions, 1375 flow. Second operand 5 states and 126 transitions. [2024-06-14 13:39:44,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 174 transitions, 1763 flow [2024-06-14 13:39:45,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 174 transitions, 1664 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-14 13:39:45,121 INFO L231 Difference]: Finished difference. Result has 126 places, 152 transitions, 1334 flow [2024-06-14 13:39:45,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1334, PETRI_PLACES=126, PETRI_TRANSITIONS=152} [2024-06-14 13:39:45,122 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 68 predicate places. [2024-06-14 13:39:45,122 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 152 transitions, 1334 flow [2024-06-14 13:39:45,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:45,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:45,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:45,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:39:45,123 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:45,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:45,123 INFO L85 PathProgramCache]: Analyzing trace with hash 500662966, now seen corresponding path program 1 times [2024-06-14 13:39:45,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:45,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065888792] [2024-06-14 13:39:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:45,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:48,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:48,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065888792] [2024-06-14 13:39:48,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065888792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:48,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:48,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:48,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623448356] [2024-06-14 13:39:48,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:48,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:48,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:48,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:48,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:48,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:39:48,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 152 transitions, 1334 flow. Second operand has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:48,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:48,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:39:48,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:50,931 INFO L124 PetriNetUnfolderBase]: 8179/11591 cut-off events. [2024-06-14 13:39:50,932 INFO L125 PetriNetUnfolderBase]: For 269344/269353 co-relation queries the response was YES. [2024-06-14 13:39:50,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64608 conditions, 11591 events. 8179/11591 cut-off events. For 269344/269353 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65155 event pairs, 3323 based on Foata normal form. 13/11568 useless extension candidates. Maximal degree in co-relation 64551. Up to 11168 conditions per place. [2024-06-14 13:39:51,025 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 146 selfloop transitions, 25 changer transitions 0/184 dead transitions. [2024-06-14 13:39:51,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 184 transitions, 1800 flow [2024-06-14 13:39:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:39:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:39:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:39:51,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43116883116883115 [2024-06-14 13:39:51,028 INFO L175 Difference]: Start difference. First operand has 126 places, 152 transitions, 1334 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:39:51,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 184 transitions, 1800 flow [2024-06-14 13:39:51,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 184 transitions, 1756 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:39:51,218 INFO L231 Difference]: Finished difference. Result has 129 places, 155 transitions, 1408 flow [2024-06-14 13:39:51,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1408, PETRI_PLACES=129, PETRI_TRANSITIONS=155} [2024-06-14 13:39:51,219 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 71 predicate places. [2024-06-14 13:39:51,219 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 155 transitions, 1408 flow [2024-06-14 13:39:51,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.0) internal successors, (126), 9 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:51,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:51,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:51,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:39:51,220 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:51,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:51,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2018844324, now seen corresponding path program 1 times [2024-06-14 13:39:51,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:51,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589369516] [2024-06-14 13:39:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:51,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:39:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:39:53,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:39:53,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589369516] [2024-06-14 13:39:53,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589369516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:39:53,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:39:53,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:39:53,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037602280] [2024-06-14 13:39:53,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:39:53,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:39:53,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:39:53,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:39:53,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:39:53,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:39:53,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 155 transitions, 1408 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:53,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:39:53,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:39:53,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:39:57,529 INFO L124 PetriNetUnfolderBase]: 10671/14849 cut-off events. [2024-06-14 13:39:57,530 INFO L125 PetriNetUnfolderBase]: For 354356/354418 co-relation queries the response was YES. [2024-06-14 13:39:57,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82533 conditions, 14849 events. 10671/14849 cut-off events. For 354356/354418 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 80997 event pairs, 3850 based on Foata normal form. 43/14887 useless extension candidates. Maximal degree in co-relation 82475. Up to 14531 conditions per place. [2024-06-14 13:39:57,687 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 172 selfloop transitions, 24 changer transitions 0/202 dead transitions. [2024-06-14 13:39:57,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 202 transitions, 1996 flow [2024-06-14 13:39:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:39:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:39:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:39:57,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42597402597402595 [2024-06-14 13:39:57,689 INFO L175 Difference]: Start difference. First operand has 129 places, 155 transitions, 1408 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:39:57,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 202 transitions, 1996 flow [2024-06-14 13:39:58,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 202 transitions, 1904 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 13:39:58,043 INFO L231 Difference]: Finished difference. Result has 132 places, 164 transitions, 1493 flow [2024-06-14 13:39:58,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1493, PETRI_PLACES=132, PETRI_TRANSITIONS=164} [2024-06-14 13:39:58,044 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 74 predicate places. [2024-06-14 13:39:58,044 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 164 transitions, 1493 flow [2024-06-14 13:39:58,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:39:58,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:39:58,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:39:58,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:39:58,045 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:39:58,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:39:58,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1924553374, now seen corresponding path program 2 times [2024-06-14 13:39:58,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:39:58,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858053698] [2024-06-14 13:39:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:39:58,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:39:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:00,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:00,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858053698] [2024-06-14 13:40:00,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858053698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:00,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:00,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:00,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374088781] [2024-06-14 13:40:00,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:00,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:00,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:00,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:00,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:00,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:40:00,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 164 transitions, 1493 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:00,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:00,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:40:00,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:03,454 INFO L124 PetriNetUnfolderBase]: 10690/14867 cut-off events. [2024-06-14 13:40:03,454 INFO L125 PetriNetUnfolderBase]: For 381446/381481 co-relation queries the response was YES. [2024-06-14 13:40:03,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85276 conditions, 14867 events. 10690/14867 cut-off events. For 381446/381481 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 81011 event pairs, 3873 based on Foata normal form. 17/14876 useless extension candidates. Maximal degree in co-relation 85216. Up to 14504 conditions per place. [2024-06-14 13:40:03,554 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 165 selfloop transitions, 32 changer transitions 0/203 dead transitions. [2024-06-14 13:40:03,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 203 transitions, 2189 flow [2024-06-14 13:40:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:40:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:40:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 13:40:03,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-14 13:40:03,556 INFO L175 Difference]: Start difference. First operand has 132 places, 164 transitions, 1493 flow. Second operand 6 states and 141 transitions. [2024-06-14 13:40:03,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 203 transitions, 2189 flow [2024-06-14 13:40:03,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 203 transitions, 2102 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:40:03,828 INFO L231 Difference]: Finished difference. Result has 135 places, 175 transitions, 1635 flow [2024-06-14 13:40:03,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1635, PETRI_PLACES=135, PETRI_TRANSITIONS=175} [2024-06-14 13:40:03,829 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 77 predicate places. [2024-06-14 13:40:03,829 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 175 transitions, 1635 flow [2024-06-14 13:40:03,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:03,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:03,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:03,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:40:03,829 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:03,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:03,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1924542214, now seen corresponding path program 3 times [2024-06-14 13:40:03,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:03,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007502724] [2024-06-14 13:40:03,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:03,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:06,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:06,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007502724] [2024-06-14 13:40:06,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007502724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:06,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:06,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:06,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076535071] [2024-06-14 13:40:06,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:06,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:06,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:06,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:40:06,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 175 transitions, 1635 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:06,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:06,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:40:06,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:09,177 INFO L124 PetriNetUnfolderBase]: 10683/14865 cut-off events. [2024-06-14 13:40:09,177 INFO L125 PetriNetUnfolderBase]: For 413735/413806 co-relation queries the response was YES. [2024-06-14 13:40:09,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88325 conditions, 14865 events. 10683/14865 cut-off events. For 413735/413806 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 81053 event pairs, 3850 based on Foata normal form. 50/14910 useless extension candidates. Maximal degree in co-relation 88263. Up to 14536 conditions per place. [2024-06-14 13:40:09,302 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 176 selfloop transitions, 27 changer transitions 0/209 dead transitions. [2024-06-14 13:40:09,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 209 transitions, 2136 flow [2024-06-14 13:40:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:40:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:40:09,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 13:40:09,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 13:40:09,305 INFO L175 Difference]: Start difference. First operand has 135 places, 175 transitions, 1635 flow. Second operand 6 states and 145 transitions. [2024-06-14 13:40:09,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 209 transitions, 2136 flow [2024-06-14 13:40:09,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 209 transitions, 2010 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 13:40:09,698 INFO L231 Difference]: Finished difference. Result has 138 places, 176 transitions, 1590 flow [2024-06-14 13:40:09,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1590, PETRI_PLACES=138, PETRI_TRANSITIONS=176} [2024-06-14 13:40:09,703 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 80 predicate places. [2024-06-14 13:40:09,703 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 176 transitions, 1590 flow [2024-06-14 13:40:09,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:09,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:09,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:09,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:40:09,703 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:09,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1068752150, now seen corresponding path program 1 times [2024-06-14 13:40:09,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:09,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009021458] [2024-06-14 13:40:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:09,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:12,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:12,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009021458] [2024-06-14 13:40:12,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009021458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:12,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:12,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:12,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954854550] [2024-06-14 13:40:12,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:12,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:12,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:12,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:12,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:12,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:40:12,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 176 transitions, 1590 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:12,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:12,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:40:12,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:15,176 INFO L124 PetriNetUnfolderBase]: 8662/12146 cut-off events. [2024-06-14 13:40:15,177 INFO L125 PetriNetUnfolderBase]: For 361076/361114 co-relation queries the response was YES. [2024-06-14 13:40:15,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74464 conditions, 12146 events. 8662/12146 cut-off events. For 361076/361114 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67406 event pairs, 3347 based on Foata normal form. 23/12163 useless extension candidates. Maximal degree in co-relation 74401. Up to 11860 conditions per place. [2024-06-14 13:40:15,274 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 175 selfloop transitions, 30 changer transitions 0/212 dead transitions. [2024-06-14 13:40:15,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 212 transitions, 2144 flow [2024-06-14 13:40:15,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:40:15,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:40:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:40:15,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43116883116883115 [2024-06-14 13:40:15,276 INFO L175 Difference]: Start difference. First operand has 138 places, 176 transitions, 1590 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:40:15,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 212 transitions, 2144 flow [2024-06-14 13:40:15,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 212 transitions, 2094 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 13:40:15,494 INFO L231 Difference]: Finished difference. Result has 141 places, 180 transitions, 1683 flow [2024-06-14 13:40:15,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1683, PETRI_PLACES=141, PETRI_TRANSITIONS=180} [2024-06-14 13:40:15,495 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 83 predicate places. [2024-06-14 13:40:15,495 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 180 transitions, 1683 flow [2024-06-14 13:40:15,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:15,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:15,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:15,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:40:15,496 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:15,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:15,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1430771276, now seen corresponding path program 2 times [2024-06-14 13:40:15,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:15,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765967138] [2024-06-14 13:40:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:15,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:17,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:17,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765967138] [2024-06-14 13:40:17,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765967138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:17,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:17,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:17,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726967820] [2024-06-14 13:40:17,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:17,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:17,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:17,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:17,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:17,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:40:17,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 180 transitions, 1683 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:17,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:17,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:40:17,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:21,338 INFO L124 PetriNetUnfolderBase]: 8681/12177 cut-off events. [2024-06-14 13:40:21,339 INFO L125 PetriNetUnfolderBase]: For 389636/389674 co-relation queries the response was YES. [2024-06-14 13:40:21,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77323 conditions, 12177 events. 8681/12177 cut-off events. For 389636/389674 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67648 event pairs, 3347 based on Foata normal form. 23/12194 useless extension candidates. Maximal degree in co-relation 77259. Up to 11896 conditions per place. [2024-06-14 13:40:21,503 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 178 selfloop transitions, 26 changer transitions 0/211 dead transitions. [2024-06-14 13:40:21,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 211 transitions, 2231 flow [2024-06-14 13:40:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:40:21,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:40:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 13:40:21,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44242424242424244 [2024-06-14 13:40:21,506 INFO L175 Difference]: Start difference. First operand has 141 places, 180 transitions, 1683 flow. Second operand 6 states and 146 transitions. [2024-06-14 13:40:21,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 211 transitions, 2231 flow [2024-06-14 13:40:21,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 211 transitions, 2118 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 13:40:21,856 INFO L231 Difference]: Finished difference. Result has 142 places, 184 transitions, 1713 flow [2024-06-14 13:40:21,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1713, PETRI_PLACES=142, PETRI_TRANSITIONS=184} [2024-06-14 13:40:21,857 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 84 predicate places. [2024-06-14 13:40:21,857 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 184 transitions, 1713 flow [2024-06-14 13:40:21,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:21,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:21,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:21,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:40:21,858 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:21,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:21,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1430776856, now seen corresponding path program 3 times [2024-06-14 13:40:21,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:21,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928562445] [2024-06-14 13:40:21,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:21,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:24,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:24,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928562445] [2024-06-14 13:40:24,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928562445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:24,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:24,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:40:24,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478983036] [2024-06-14 13:40:24,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:24,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:40:24,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:24,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:40:24,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:40:24,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:40:24,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 184 transitions, 1713 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:24,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:24,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:40:24,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:27,837 INFO L124 PetriNetUnfolderBase]: 8674/12168 cut-off events. [2024-06-14 13:40:27,837 INFO L125 PetriNetUnfolderBase]: For 424016/424054 co-relation queries the response was YES. [2024-06-14 13:40:27,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79726 conditions, 12168 events. 8674/12168 cut-off events. For 424016/424054 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 68014 event pairs, 3347 based on Foata normal form. 23/12185 useless extension candidates. Maximal degree in co-relation 79661. Up to 11848 conditions per place. [2024-06-14 13:40:27,931 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 176 selfloop transitions, 37 changer transitions 0/220 dead transitions. [2024-06-14 13:40:27,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 220 transitions, 2299 flow [2024-06-14 13:40:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:40:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:40:27,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:40:27,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-14 13:40:27,933 INFO L175 Difference]: Start difference. First operand has 142 places, 184 transitions, 1713 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:40:27,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 220 transitions, 2299 flow [2024-06-14 13:40:28,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 220 transitions, 2186 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 13:40:28,175 INFO L231 Difference]: Finished difference. Result has 145 places, 188 transitions, 1773 flow [2024-06-14 13:40:28,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1773, PETRI_PLACES=145, PETRI_TRANSITIONS=188} [2024-06-14 13:40:28,175 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 87 predicate places. [2024-06-14 13:40:28,175 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 188 transitions, 1773 flow [2024-06-14 13:40:28,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:28,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:28,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:28,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:40:28,176 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:28,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:28,176 INFO L85 PathProgramCache]: Analyzing trace with hash -390799275, now seen corresponding path program 1 times [2024-06-14 13:40:28,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:28,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005805018] [2024-06-14 13:40:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:28,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:30,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:30,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005805018] [2024-06-14 13:40:30,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005805018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:30,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:30,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:40:30,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045054465] [2024-06-14 13:40:30,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:30,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:40:30,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:30,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:40:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:40:30,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 55 [2024-06-14 13:40:30,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 188 transitions, 1773 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:30,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:30,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 55 [2024-06-14 13:40:30,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:33,664 INFO L124 PetriNetUnfolderBase]: 7907/11333 cut-off events. [2024-06-14 13:40:33,664 INFO L125 PetriNetUnfolderBase]: For 485036/485096 co-relation queries the response was YES. [2024-06-14 13:40:33,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79786 conditions, 11333 events. 7907/11333 cut-off events. For 485036/485096 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 65271 event pairs, 3171 based on Foata normal form. 4/11078 useless extension candidates. Maximal degree in co-relation 79720. Up to 10656 conditions per place. [2024-06-14 13:40:33,781 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 150 selfloop transitions, 18 changer transitions 0/206 dead transitions. [2024-06-14 13:40:33,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 206 transitions, 2195 flow [2024-06-14 13:40:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:40:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:40:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 13:40:33,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44363636363636366 [2024-06-14 13:40:33,783 INFO L175 Difference]: Start difference. First operand has 145 places, 188 transitions, 1773 flow. Second operand 5 states and 122 transitions. [2024-06-14 13:40:33,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 206 transitions, 2195 flow [2024-06-14 13:40:34,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 206 transitions, 2052 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 13:40:34,237 INFO L231 Difference]: Finished difference. Result has 145 places, 192 transitions, 1736 flow [2024-06-14 13:40:34,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1736, PETRI_PLACES=145, PETRI_TRANSITIONS=192} [2024-06-14 13:40:34,238 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 87 predicate places. [2024-06-14 13:40:34,238 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 192 transitions, 1736 flow [2024-06-14 13:40:34,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:34,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:34,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:34,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:40:34,239 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:34,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:34,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1466327399, now seen corresponding path program 1 times [2024-06-14 13:40:34,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:34,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965370182] [2024-06-14 13:40:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:34,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:37,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:37,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965370182] [2024-06-14 13:40:37,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965370182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:37,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:37,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:37,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283709867] [2024-06-14 13:40:37,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:37,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:37,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:37,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:37,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:40:37,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 192 transitions, 1736 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:37,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:37,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:40:37,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:40,864 INFO L124 PetriNetUnfolderBase]: 10732/14950 cut-off events. [2024-06-14 13:40:40,864 INFO L125 PetriNetUnfolderBase]: For 574284/574348 co-relation queries the response was YES. [2024-06-14 13:40:40,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100218 conditions, 14950 events. 10732/14950 cut-off events. For 574284/574348 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 81884 event pairs, 3788 based on Foata normal form. 45/14990 useless extension candidates. Maximal degree in co-relation 100151. Up to 14603 conditions per place. [2024-06-14 13:40:41,035 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 205 selfloop transitions, 28 changer transitions 0/239 dead transitions. [2024-06-14 13:40:41,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 239 transitions, 2374 flow [2024-06-14 13:40:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:40:41,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:40:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:40:41,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-14 13:40:41,043 INFO L175 Difference]: Start difference. First operand has 145 places, 192 transitions, 1736 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:40:41,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 239 transitions, 2374 flow [2024-06-14 13:40:41,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 239 transitions, 2306 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 13:40:41,520 INFO L231 Difference]: Finished difference. Result has 150 places, 196 transitions, 1805 flow [2024-06-14 13:40:41,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1668, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1805, PETRI_PLACES=150, PETRI_TRANSITIONS=196} [2024-06-14 13:40:41,521 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 92 predicate places. [2024-06-14 13:40:41,521 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 196 transitions, 1805 flow [2024-06-14 13:40:41,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:41,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:41,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:41,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:40:41,521 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:41,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:41,522 INFO L85 PathProgramCache]: Analyzing trace with hash -468373533, now seen corresponding path program 2 times [2024-06-14 13:40:41,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:41,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629836804] [2024-06-14 13:40:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:41,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:41,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:44,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:44,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629836804] [2024-06-14 13:40:44,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629836804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:44,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:44,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:44,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026039673] [2024-06-14 13:40:44,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:44,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:44,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:44,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:44,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:40:44,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 196 transitions, 1805 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:44,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:44,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:40:44,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:47,872 INFO L124 PetriNetUnfolderBase]: 10751/14968 cut-off events. [2024-06-14 13:40:47,872 INFO L125 PetriNetUnfolderBase]: For 609904/609939 co-relation queries the response was YES. [2024-06-14 13:40:47,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103319 conditions, 14968 events. 10751/14968 cut-off events. For 609904/609939 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 81822 event pairs, 3811 based on Foata normal form. 17/14977 useless extension candidates. Maximal degree in co-relation 103251. Up to 14520 conditions per place. [2024-06-14 13:40:48,007 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 188 selfloop transitions, 47 changer transitions 0/241 dead transitions. [2024-06-14 13:40:48,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 241 transitions, 2649 flow [2024-06-14 13:40:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:40:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:40:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:40:48,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42077922077922075 [2024-06-14 13:40:48,010 INFO L175 Difference]: Start difference. First operand has 150 places, 196 transitions, 1805 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:40:48,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 241 transitions, 2649 flow [2024-06-14 13:40:48,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 241 transitions, 2542 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 13:40:48,419 INFO L231 Difference]: Finished difference. Result has 152 places, 207 transitions, 1990 flow [2024-06-14 13:40:48,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1990, PETRI_PLACES=152, PETRI_TRANSITIONS=207} [2024-06-14 13:40:48,419 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 94 predicate places. [2024-06-14 13:40:48,420 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 207 transitions, 1990 flow [2024-06-14 13:40:48,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:48,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:48,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:48,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:40:48,420 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:48,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:48,421 INFO L85 PathProgramCache]: Analyzing trace with hash -468385623, now seen corresponding path program 3 times [2024-06-14 13:40:48,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:48,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473287879] [2024-06-14 13:40:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:48,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:40:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:40:52,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:40:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473287879] [2024-06-14 13:40:52,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473287879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:40:52,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:40:52,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:40:52,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021257312] [2024-06-14 13:40:52,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:40:52,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:40:52,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:40:52,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:40:52,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:40:52,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:40:52,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 207 transitions, 1990 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:52,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:40:52,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:40:52,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:40:56,114 INFO L124 PetriNetUnfolderBase]: 10770/14993 cut-off events. [2024-06-14 13:40:56,114 INFO L125 PetriNetUnfolderBase]: For 651252/651287 co-relation queries the response was YES. [2024-06-14 13:40:56,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106677 conditions, 14993 events. 10770/14993 cut-off events. For 651252/651287 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 82005 event pairs, 3811 based on Foata normal form. 17/15002 useless extension candidates. Maximal degree in co-relation 106607. Up to 14603 conditions per place. [2024-06-14 13:40:56,252 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 199 selfloop transitions, 37 changer transitions 0/242 dead transitions. [2024-06-14 13:40:56,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 242 transitions, 2624 flow [2024-06-14 13:40:56,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:40:56,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:40:56,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 13:40:56,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4103896103896104 [2024-06-14 13:40:56,255 INFO L175 Difference]: Start difference. First operand has 152 places, 207 transitions, 1990 flow. Second operand 7 states and 158 transitions. [2024-06-14 13:40:56,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 242 transitions, 2624 flow [2024-06-14 13:40:56,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 242 transitions, 2484 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-14 13:40:56,687 INFO L231 Difference]: Finished difference. Result has 156 places, 211 transitions, 2025 flow [2024-06-14 13:40:56,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2025, PETRI_PLACES=156, PETRI_TRANSITIONS=211} [2024-06-14 13:40:56,687 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 98 predicate places. [2024-06-14 13:40:56,687 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 211 transitions, 2025 flow [2024-06-14 13:40:56,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:40:56,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:40:56,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:40:56,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:40:56,688 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:40:56,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:40:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash -468731583, now seen corresponding path program 4 times [2024-06-14 13:40:56,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:40:56,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473390254] [2024-06-14 13:40:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:40:56,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:40:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:00,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:00,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473390254] [2024-06-14 13:41:00,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473390254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:00,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:00,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:00,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569276468] [2024-06-14 13:41:00,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:00,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:00,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:00,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:00,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:00,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:41:00,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 211 transitions, 2025 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:00,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:00,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:41:00,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:04,064 INFO L124 PetriNetUnfolderBase]: 10763/14991 cut-off events. [2024-06-14 13:41:04,065 INFO L125 PetriNetUnfolderBase]: For 680022/680086 co-relation queries the response was YES. [2024-06-14 13:41:04,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107535 conditions, 14991 events. 10763/14991 cut-off events. For 680022/680086 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 82072 event pairs, 3788 based on Foata normal form. 45/15031 useless extension candidates. Maximal degree in co-relation 107463. Up to 14622 conditions per place. [2024-06-14 13:41:04,216 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 209 selfloop transitions, 35 changer transitions 0/250 dead transitions. [2024-06-14 13:41:04,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 250 transitions, 2622 flow [2024-06-14 13:41:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:41:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:41:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:41:04,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42597402597402595 [2024-06-14 13:41:04,218 INFO L175 Difference]: Start difference. First operand has 156 places, 211 transitions, 2025 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:41:04,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 250 transitions, 2622 flow [2024-06-14 13:41:04,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 250 transitions, 2471 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 13:41:04,884 INFO L231 Difference]: Finished difference. Result has 158 places, 212 transitions, 1973 flow [2024-06-14 13:41:04,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1973, PETRI_PLACES=158, PETRI_TRANSITIONS=212} [2024-06-14 13:41:04,885 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 100 predicate places. [2024-06-14 13:41:04,885 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 212 transitions, 1973 flow [2024-06-14 13:41:04,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:04,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:04,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:04,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:41:04,886 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:04,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:04,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1225561725, now seen corresponding path program 1 times [2024-06-14 13:41:04,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:04,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683398208] [2024-06-14 13:41:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:04,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:07,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:07,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683398208] [2024-06-14 13:41:07,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683398208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:07,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:07,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:07,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958478037] [2024-06-14 13:41:07,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:07,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:07,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:07,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:07,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:07,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:41:07,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 212 transitions, 1973 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:07,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:07,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:41:07,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:11,403 INFO L124 PetriNetUnfolderBase]: 8740/12264 cut-off events. [2024-06-14 13:41:11,404 INFO L125 PetriNetUnfolderBase]: For 594775/594813 co-relation queries the response was YES. [2024-06-14 13:41:11,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91738 conditions, 12264 events. 8740/12264 cut-off events. For 594775/594813 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 68381 event pairs, 3131 based on Foata normal form. 25/12283 useless extension candidates. Maximal degree in co-relation 91665. Up to 11877 conditions per place. [2024-06-14 13:41:11,548 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 217 selfloop transitions, 34 changer transitions 0/258 dead transitions. [2024-06-14 13:41:11,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 258 transitions, 2881 flow [2024-06-14 13:41:11,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:41:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:41:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 13:41:11,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44935064935064933 [2024-06-14 13:41:11,550 INFO L175 Difference]: Start difference. First operand has 158 places, 212 transitions, 1973 flow. Second operand 7 states and 173 transitions. [2024-06-14 13:41:11,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 258 transitions, 2881 flow [2024-06-14 13:41:11,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 258 transitions, 2807 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:41:11,972 INFO L231 Difference]: Finished difference. Result has 160 places, 218 transitions, 2149 flow [2024-06-14 13:41:11,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2149, PETRI_PLACES=160, PETRI_TRANSITIONS=218} [2024-06-14 13:41:11,973 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 102 predicate places. [2024-06-14 13:41:11,973 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 218 transitions, 2149 flow [2024-06-14 13:41:11,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:11,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:11,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:11,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:41:11,974 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:11,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:11,974 INFO L85 PathProgramCache]: Analyzing trace with hash -177077413, now seen corresponding path program 2 times [2024-06-14 13:41:11,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:11,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626022145] [2024-06-14 13:41:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:11,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:14,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:14,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626022145] [2024-06-14 13:41:14,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626022145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:14,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:14,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:14,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781012467] [2024-06-14 13:41:14,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:14,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:14,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:14,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:14,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:14,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:41:14,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 218 transitions, 2149 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:14,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:14,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:41:14,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:18,145 INFO L124 PetriNetUnfolderBase]: 8772/12308 cut-off events. [2024-06-14 13:41:18,145 INFO L125 PetriNetUnfolderBase]: For 634325/634358 co-relation queries the response was YES. [2024-06-14 13:41:18,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94095 conditions, 12308 events. 8772/12308 cut-off events. For 634325/634358 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 68537 event pairs, 3289 based on Foata normal form. 25/12327 useless extension candidates. Maximal degree in co-relation 94021. Up to 11999 conditions per place. [2024-06-14 13:41:18,259 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 218 selfloop transitions, 29 changer transitions 0/254 dead transitions. [2024-06-14 13:41:18,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 254 transitions, 2813 flow [2024-06-14 13:41:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:41:18,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:41:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:41:18,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43116883116883115 [2024-06-14 13:41:18,261 INFO L175 Difference]: Start difference. First operand has 160 places, 218 transitions, 2149 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:41:18,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 254 transitions, 2813 flow [2024-06-14 13:41:18,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 254 transitions, 2663 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-14 13:41:18,671 INFO L231 Difference]: Finished difference. Result has 164 places, 221 transitions, 2161 flow [2024-06-14 13:41:18,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2021, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2161, PETRI_PLACES=164, PETRI_TRANSITIONS=221} [2024-06-14 13:41:18,672 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 106 predicate places. [2024-06-14 13:41:18,672 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 221 transitions, 2161 flow [2024-06-14 13:41:18,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:18,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:18,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:18,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:41:18,673 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:18,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:18,673 INFO L85 PathProgramCache]: Analyzing trace with hash -177072453, now seen corresponding path program 1 times [2024-06-14 13:41:18,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:18,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694374276] [2024-06-14 13:41:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:18,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:21,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:21,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694374276] [2024-06-14 13:41:21,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694374276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:21,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:21,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:21,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433473075] [2024-06-14 13:41:21,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:21,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:21,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:21,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:21,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:21,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:41:21,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 221 transitions, 2161 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:21,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:21,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:41:21,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:25,070 INFO L124 PetriNetUnfolderBase]: 8791/12339 cut-off events. [2024-06-14 13:41:25,070 INFO L125 PetriNetUnfolderBase]: For 661181/661214 co-relation queries the response was YES. [2024-06-14 13:41:25,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94817 conditions, 12339 events. 8791/12339 cut-off events. For 661181/661214 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 68827 event pairs, 3271 based on Foata normal form. 23/12356 useless extension candidates. Maximal degree in co-relation 94741. Up to 12024 conditions per place. [2024-06-14 13:41:25,184 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 221 selfloop transitions, 34 changer transitions 0/262 dead transitions. [2024-06-14 13:41:25,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 262 transitions, 2855 flow [2024-06-14 13:41:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:25,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:41:25,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-14 13:41:25,185 INFO L175 Difference]: Start difference. First operand has 164 places, 221 transitions, 2161 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:41:25,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 262 transitions, 2855 flow [2024-06-14 13:41:25,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 262 transitions, 2745 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:41:25,694 INFO L231 Difference]: Finished difference. Result has 167 places, 225 transitions, 2230 flow [2024-06-14 13:41:25,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2051, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2230, PETRI_PLACES=167, PETRI_TRANSITIONS=225} [2024-06-14 13:41:25,695 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 109 predicate places. [2024-06-14 13:41:25,695 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 225 transitions, 2230 flow [2024-06-14 13:41:25,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:25,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:25,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:25,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:41:25,696 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:25,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:25,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1404233563, now seen corresponding path program 3 times [2024-06-14 13:41:25,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:25,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697436116] [2024-06-14 13:41:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:25,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:28,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:28,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697436116] [2024-06-14 13:41:28,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697436116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:28,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:28,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:41:28,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901071217] [2024-06-14 13:41:28,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:28,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:41:28,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:28,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:41:28,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:41:28,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:41:28,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 225 transitions, 2230 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:28,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:28,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:41:28,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:31,970 INFO L124 PetriNetUnfolderBase]: 8779/12323 cut-off events. [2024-06-14 13:41:31,970 INFO L125 PetriNetUnfolderBase]: For 697035/697068 co-relation queries the response was YES. [2024-06-14 13:41:32,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96918 conditions, 12323 events. 8779/12323 cut-off events. For 697035/697068 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 68649 event pairs, 3111 based on Foata normal form. 25/12342 useless extension candidates. Maximal degree in co-relation 96841. Up to 11981 conditions per place. [2024-06-14 13:41:32,087 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 222 selfloop transitions, 28 changer transitions 0/257 dead transitions. [2024-06-14 13:41:32,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 257 transitions, 2808 flow [2024-06-14 13:41:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:41:32,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:41:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 13:41:32,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575757575757576 [2024-06-14 13:41:32,089 INFO L175 Difference]: Start difference. First operand has 167 places, 225 transitions, 2230 flow. Second operand 6 states and 151 transitions. [2024-06-14 13:41:32,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 257 transitions, 2808 flow [2024-06-14 13:41:32,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 257 transitions, 2607 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-14 13:41:32,565 INFO L231 Difference]: Finished difference. Result has 167 places, 225 transitions, 2097 flow [2024-06-14 13:41:32,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2029, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2097, PETRI_PLACES=167, PETRI_TRANSITIONS=225} [2024-06-14 13:41:32,566 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 109 predicate places. [2024-06-14 13:41:32,566 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 225 transitions, 2097 flow [2024-06-14 13:41:32,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:32,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:32,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:32,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:41:32,567 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:32,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:32,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1404418013, now seen corresponding path program 2 times [2024-06-14 13:41:32,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:32,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363522973] [2024-06-14 13:41:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:32,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:35,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:35,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363522973] [2024-06-14 13:41:35,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363522973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:35,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:35,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:35,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696242916] [2024-06-14 13:41:35,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:35,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:35,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:35,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:35,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:35,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:41:35,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 225 transitions, 2097 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:35,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:35,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:41:35,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:38,998 INFO L124 PetriNetUnfolderBase]: 8798/12348 cut-off events. [2024-06-14 13:41:38,998 INFO L125 PetriNetUnfolderBase]: For 732251/732284 co-relation queries the response was YES. [2024-06-14 13:41:39,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97609 conditions, 12348 events. 8798/12348 cut-off events. For 732251/732284 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 69210 event pairs, 3269 based on Foata normal form. 23/12365 useless extension candidates. Maximal degree in co-relation 97531. Up to 11958 conditions per place. [2024-06-14 13:41:39,125 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 214 selfloop transitions, 51 changer transitions 0/272 dead transitions. [2024-06-14 13:41:39,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 272 transitions, 3083 flow [2024-06-14 13:41:39,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 13:41:39,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-14 13:41:39,127 INFO L175 Difference]: Start difference. First operand has 167 places, 225 transitions, 2097 flow. Second operand 8 states and 192 transitions. [2024-06-14 13:41:39,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 272 transitions, 3083 flow [2024-06-14 13:41:39,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 272 transitions, 3017 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:41:39,717 INFO L231 Difference]: Finished difference. Result has 170 places, 233 transitions, 2354 flow [2024-06-14 13:41:39,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2031, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2354, PETRI_PLACES=170, PETRI_TRANSITIONS=233} [2024-06-14 13:41:39,717 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 112 predicate places. [2024-06-14 13:41:39,717 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 233 transitions, 2354 flow [2024-06-14 13:41:39,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:39,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:39,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:39,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:41:39,718 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:39,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:39,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1404411503, now seen corresponding path program 3 times [2024-06-14 13:41:39,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:39,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596121920] [2024-06-14 13:41:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:39,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:42,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:42,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596121920] [2024-06-14 13:41:42,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596121920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:42,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:42,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:42,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571781617] [2024-06-14 13:41:42,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:42,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:42,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:42,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:42,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:41:42,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 233 transitions, 2354 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:42,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:42,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:41:42,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:45,778 INFO L124 PetriNetUnfolderBase]: 8817/12363 cut-off events. [2024-06-14 13:41:45,778 INFO L125 PetriNetUnfolderBase]: For 778213/778242 co-relation queries the response was YES. [2024-06-14 13:41:45,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100478 conditions, 12363 events. 8817/12363 cut-off events. For 778213/778242 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 69185 event pairs, 3269 based on Foata normal form. 20/12377 useless extension candidates. Maximal degree in co-relation 100399. Up to 12030 conditions per place. [2024-06-14 13:41:45,885 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 226 selfloop transitions, 41 changer transitions 0/274 dead transitions. [2024-06-14 13:41:45,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 274 transitions, 3088 flow [2024-06-14 13:41:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:41:45,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:41:45,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:41:45,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-14 13:41:45,887 INFO L175 Difference]: Start difference. First operand has 170 places, 233 transitions, 2354 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:41:45,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 274 transitions, 3088 flow [2024-06-14 13:41:46,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 274 transitions, 2908 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-14 13:41:46,343 INFO L231 Difference]: Finished difference. Result has 174 places, 237 transitions, 2383 flow [2024-06-14 13:41:46,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2196, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2383, PETRI_PLACES=174, PETRI_TRANSITIONS=237} [2024-06-14 13:41:46,343 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 116 predicate places. [2024-06-14 13:41:46,344 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 237 transitions, 2383 flow [2024-06-14 13:41:46,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:46,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:46,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:46,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:41:46,344 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:46,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:46,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1404238523, now seen corresponding path program 4 times [2024-06-14 13:41:46,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:46,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595760519] [2024-06-14 13:41:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:46,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:49,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:49,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595760519] [2024-06-14 13:41:49,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595760519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:49,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:49,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:41:49,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141914386] [2024-06-14 13:41:49,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:49,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:41:49,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:49,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:41:49,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:41:49,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 55 [2024-06-14 13:41:49,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 237 transitions, 2383 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:49,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:49,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 55 [2024-06-14 13:41:49,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:41:53,389 INFO L124 PetriNetUnfolderBase]: 8810/12354 cut-off events. [2024-06-14 13:41:53,389 INFO L125 PetriNetUnfolderBase]: For 804904/804933 co-relation queries the response was YES. [2024-06-14 13:41:53,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101007 conditions, 12354 events. 8810/12354 cut-off events. For 804904/804933 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 69088 event pairs, 3269 based on Foata normal form. 20/12368 useless extension candidates. Maximal degree in co-relation 100926. Up to 12060 conditions per place. [2024-06-14 13:41:53,562 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 232 selfloop transitions, 30 changer transitions 0/269 dead transitions. [2024-06-14 13:41:53,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 269 transitions, 2985 flow [2024-06-14 13:41:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:41:53,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:41:53,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:41:53,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43116883116883115 [2024-06-14 13:41:53,569 INFO L175 Difference]: Start difference. First operand has 174 places, 237 transitions, 2383 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:41:53,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 269 transitions, 2985 flow [2024-06-14 13:41:54,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 269 transitions, 2778 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-14 13:41:54,313 INFO L231 Difference]: Finished difference. Result has 175 places, 237 transitions, 2245 flow [2024-06-14 13:41:54,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2245, PETRI_PLACES=175, PETRI_TRANSITIONS=237} [2024-06-14 13:41:54,313 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 117 predicate places. [2024-06-14 13:41:54,313 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 237 transitions, 2245 flow [2024-06-14 13:41:54,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:54,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:41:54,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:41:54,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:41:54,314 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:41:54,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:41:54,314 INFO L85 PathProgramCache]: Analyzing trace with hash 770126505, now seen corresponding path program 1 times [2024-06-14 13:41:54,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:41:54,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13050491] [2024-06-14 13:41:54,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:41:54,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:41:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:41:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:41:57,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:41:57,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13050491] [2024-06-14 13:41:57,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13050491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:41:57,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:41:57,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:41:57,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630290578] [2024-06-14 13:41:57,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:41:57,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:41:57,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:41:57,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:41:57,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:41:57,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 55 [2024-06-14 13:41:57,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 237 transitions, 2245 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:41:57,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:41:57,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 55 [2024-06-14 13:41:57,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:01,112 INFO L124 PetriNetUnfolderBase]: 10066/14275 cut-off events. [2024-06-14 13:42:01,113 INFO L125 PetriNetUnfolderBase]: For 1035643/1035781 co-relation queries the response was YES. [2024-06-14 13:42:01,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117137 conditions, 14275 events. 10066/14275 cut-off events. For 1035643/1035781 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 81027 event pairs, 3502 based on Foata normal form. 11/14025 useless extension candidates. Maximal degree in co-relation 117055. Up to 13358 conditions per place. [2024-06-14 13:42:01,245 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 209 selfloop transitions, 19 changer transitions 0/270 dead transitions. [2024-06-14 13:42:01,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 270 transitions, 2927 flow [2024-06-14 13:42:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:42:01,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:42:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 13:42:01,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121212121212121 [2024-06-14 13:42:01,246 INFO L175 Difference]: Start difference. First operand has 175 places, 237 transitions, 2245 flow. Second operand 6 states and 136 transitions. [2024-06-14 13:42:01,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 270 transitions, 2927 flow [2024-06-14 13:42:02,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 270 transitions, 2815 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:42:02,040 INFO L231 Difference]: Finished difference. Result has 177 places, 254 transitions, 2414 flow [2024-06-14 13:42:02,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2414, PETRI_PLACES=177, PETRI_TRANSITIONS=254} [2024-06-14 13:42:02,041 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 119 predicate places. [2024-06-14 13:42:02,041 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 254 transitions, 2414 flow [2024-06-14 13:42:02,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:02,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:02,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:02,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:42:02,042 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:42:02,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:02,042 INFO L85 PathProgramCache]: Analyzing trace with hash -341727645, now seen corresponding path program 1 times [2024-06-14 13:42:02,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:02,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914191480] [2024-06-14 13:42:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:02,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:04,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:04,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914191480] [2024-06-14 13:42:04,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914191480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:04,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:04,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:42:04,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497849700] [2024-06-14 13:42:04,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:04,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:42:04,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:04,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:42:04,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:42:04,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:42:04,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 254 transitions, 2414 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:04,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:04,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:42:04,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:08,839 INFO L124 PetriNetUnfolderBase]: 10999/15327 cut-off events. [2024-06-14 13:42:08,839 INFO L125 PetriNetUnfolderBase]: For 1011262/1011336 co-relation queries the response was YES. [2024-06-14 13:42:08,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123214 conditions, 15327 events. 10999/15327 cut-off events. For 1011262/1011336 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 84266 event pairs, 2946 based on Foata normal form. 51/15373 useless extension candidates. Maximal degree in co-relation 123129. Up to 14852 conditions per place. [2024-06-14 13:42:08,966 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 271 selfloop transitions, 34 changer transitions 0/311 dead transitions. [2024-06-14 13:42:08,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 311 transitions, 3265 flow [2024-06-14 13:42:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:42:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:42:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:42:08,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-14 13:42:08,969 INFO L175 Difference]: Start difference. First operand has 177 places, 254 transitions, 2414 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:42:08,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 311 transitions, 3265 flow [2024-06-14 13:42:09,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 311 transitions, 3235 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-14 13:42:09,703 INFO L231 Difference]: Finished difference. Result has 185 places, 261 transitions, 2591 flow [2024-06-14 13:42:09,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2591, PETRI_PLACES=185, PETRI_TRANSITIONS=261} [2024-06-14 13:42:09,703 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 127 predicate places. [2024-06-14 13:42:09,703 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 261 transitions, 2591 flow [2024-06-14 13:42:09,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:09,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:09,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:09,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:42:09,704 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:42:09,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash -151659929, now seen corresponding path program 2 times [2024-06-14 13:42:09,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:09,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908224558] [2024-06-14 13:42:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:09,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:12,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:12,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908224558] [2024-06-14 13:42:12,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908224558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:12,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:12,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:42:12,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083636483] [2024-06-14 13:42:12,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:12,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:42:12,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:12,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:42:12,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:42:12,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:42:12,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 261 transitions, 2591 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:12,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:12,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:42:12,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:16,494 INFO L124 PetriNetUnfolderBase]: 11063/15415 cut-off events. [2024-06-14 13:42:16,494 INFO L125 PetriNetUnfolderBase]: For 1058227/1058301 co-relation queries the response was YES. [2024-06-14 13:42:16,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126298 conditions, 15415 events. 11063/15415 cut-off events. For 1058227/1058301 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 84826 event pairs, 3632 based on Foata normal form. 51/15461 useless extension candidates. Maximal degree in co-relation 126209. Up to 15028 conditions per place. [2024-06-14 13:42:16,631 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 277 selfloop transitions, 29 changer transitions 0/312 dead transitions. [2024-06-14 13:42:16,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 312 transitions, 3435 flow [2024-06-14 13:42:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:42:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:42:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:42:16,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-14 13:42:16,633 INFO L175 Difference]: Start difference. First operand has 185 places, 261 transitions, 2591 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:42:16,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 312 transitions, 3435 flow [2024-06-14 13:42:17,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 312 transitions, 3287 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 13:42:17,613 INFO L231 Difference]: Finished difference. Result has 189 places, 267 transitions, 2642 flow [2024-06-14 13:42:17,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2449, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2642, PETRI_PLACES=189, PETRI_TRANSITIONS=267} [2024-06-14 13:42:17,614 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 131 predicate places. [2024-06-14 13:42:17,614 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 267 transitions, 2642 flow [2024-06-14 13:42:17,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:17,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:17,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:17,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:42:17,615 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:42:17,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:17,615 INFO L85 PathProgramCache]: Analyzing trace with hash -151333499, now seen corresponding path program 3 times [2024-06-14 13:42:17,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:17,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848036817] [2024-06-14 13:42:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:17,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:20,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:20,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848036817] [2024-06-14 13:42:20,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848036817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:20,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:20,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:42:20,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011497357] [2024-06-14 13:42:20,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:20,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:42:20,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:20,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:42:20,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:42:20,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:42:20,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 267 transitions, 2642 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:20,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:20,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:42:20,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:24,595 INFO L124 PetriNetUnfolderBase]: 11095/15459 cut-off events. [2024-06-14 13:42:24,595 INFO L125 PetriNetUnfolderBase]: For 1108443/1108517 co-relation queries the response was YES. [2024-06-14 13:42:24,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128652 conditions, 15459 events. 11095/15459 cut-off events. For 1108443/1108517 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 85157 event pairs, 3638 based on Foata normal form. 51/15505 useless extension candidates. Maximal degree in co-relation 128561. Up to 15089 conditions per place. [2024-06-14 13:42:24,742 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 278 selfloop transitions, 30 changer transitions 0/314 dead transitions. [2024-06-14 13:42:24,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 314 transitions, 3459 flow [2024-06-14 13:42:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:42:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:42:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:42:24,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4159090909090909 [2024-06-14 13:42:24,744 INFO L175 Difference]: Start difference. First operand has 189 places, 267 transitions, 2642 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:42:24,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 314 transitions, 3459 flow [2024-06-14 13:42:25,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 314 transitions, 3329 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 13:42:25,771 INFO L231 Difference]: Finished difference. Result has 192 places, 270 transitions, 2674 flow [2024-06-14 13:42:25,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2674, PETRI_PLACES=192, PETRI_TRANSITIONS=270} [2024-06-14 13:42:25,772 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 134 predicate places. [2024-06-14 13:42:25,772 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 270 transitions, 2674 flow [2024-06-14 13:42:25,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:25,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:25,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:25,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:42:25,772 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:42:25,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash -328819349, now seen corresponding path program 1 times [2024-06-14 13:42:25,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:25,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653830237] [2024-06-14 13:42:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:25,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:28,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:28,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653830237] [2024-06-14 13:42:28,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653830237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:28,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:28,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:42:28,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872957229] [2024-06-14 13:42:28,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:28,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:42:28,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:28,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:42:28,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:42:28,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:42:28,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 270 transitions, 2674 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:28,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:28,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:42:28,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:34,490 INFO L124 PetriNetUnfolderBase]: 11140/15521 cut-off events. [2024-06-14 13:42:34,490 INFO L125 PetriNetUnfolderBase]: For 1145018/1145130 co-relation queries the response was YES. [2024-06-14 13:42:34,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131341 conditions, 15521 events. 11140/15521 cut-off events. For 1145018/1145130 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 85674 event pairs, 3714 based on Foata normal form. 65/15573 useless extension candidates. Maximal degree in co-relation 131249. Up to 14793 conditions per place. [2024-06-14 13:42:34,642 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 256 selfloop transitions, 74 changer transitions 0/336 dead transitions. [2024-06-14 13:42:34,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 336 transitions, 4164 flow [2024-06-14 13:42:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:42:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:42:34,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 13:42:34,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-14 13:42:34,644 INFO L175 Difference]: Start difference. First operand has 192 places, 270 transitions, 2674 flow. Second operand 8 states and 201 transitions. [2024-06-14 13:42:34,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 336 transitions, 4164 flow [2024-06-14 13:42:35,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 336 transitions, 4026 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 13:42:35,811 INFO L231 Difference]: Finished difference. Result has 194 places, 282 transitions, 3031 flow [2024-06-14 13:42:35,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3031, PETRI_PLACES=194, PETRI_TRANSITIONS=282} [2024-06-14 13:42:35,812 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 136 predicate places. [2024-06-14 13:42:35,812 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 282 transitions, 3031 flow [2024-06-14 13:42:35,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:35,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:42:35,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:42:35,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:42:35,813 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:42:35,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:42:35,813 INFO L85 PathProgramCache]: Analyzing trace with hash -328699193, now seen corresponding path program 1 times [2024-06-14 13:42:35,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:42:35,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35843844] [2024-06-14 13:42:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:42:35,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:42:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:42:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:42:38,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:42:38,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35843844] [2024-06-14 13:42:38,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35843844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:42:38,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:42:38,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:42:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973055466] [2024-06-14 13:42:38,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:42:38,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:42:38,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:42:38,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:42:38,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:42:38,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 55 [2024-06-14 13:42:38,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 282 transitions, 3031 flow. Second operand has 10 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:42:38,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:42:38,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 55 [2024-06-14 13:42:38,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:42:43,279 INFO L124 PetriNetUnfolderBase]: 11178/15580 cut-off events. [2024-06-14 13:42:43,279 INFO L125 PetriNetUnfolderBase]: For 1203939/1204075 co-relation queries the response was YES. [2024-06-14 13:42:43,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134750 conditions, 15580 events. 11178/15580 cut-off events. For 1203939/1204075 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 86078 event pairs, 3658 based on Foata normal form. 82/15653 useless extension candidates. Maximal degree in co-relation 134657. Up to 15049 conditions per place. [2024-06-14 13:42:43,448 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 273 selfloop transitions, 56 changer transitions 0/335 dead transitions. [2024-06-14 13:42:43,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 335 transitions, 3952 flow [2024-06-14 13:42:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:42:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:42:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 13:42:43,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:42:43,450 INFO L175 Difference]: Start difference. First operand has 194 places, 282 transitions, 3031 flow. Second operand 8 states and 190 transitions. [2024-06-14 13:42:43,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 335 transitions, 3952 flow