./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix033.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix033.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix033.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix033.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-7724a2d-m [2024-06-28 03:16:26,511 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:16:26,564 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:16:26,567 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:16:26,567 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:16:26,610 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:16:26,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:16:26,611 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:16:26,611 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:16:26,614 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:16:26,614 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:16:26,614 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:16:26,615 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:16:26,616 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:16:26,616 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:16:26,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:16:26,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:16:26,616 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:16:26,616 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:16:26,617 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:16:26,617 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:16:26,617 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:16:26,617 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:16:26,617 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:16:26,617 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:16:26,617 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:16:26,618 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:16:26,618 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:16:26,618 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:16:26,618 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:16:26,619 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:16:26,619 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:16:26,619 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:16:26,619 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:16:26,619 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:16:26,619 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:16:26,620 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:16:26,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:16:26,620 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:16:26,620 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:16:26,620 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:16:26,620 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:16:26,620 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:16:26,621 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:16:26,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:16:26,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:16:26,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:16:26,857 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:16:26,857 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:16:26,858 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix033.opt.i [2024-06-28 03:16:27,844 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:16:28,026 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:16:28,027 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix033.opt.i [2024-06-28 03:16:28,041 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0020a1550/cf76c28f74ee4c1ba53a8568d4a11814/FLAG65a07db15 [2024-06-28 03:16:28,386 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0020a1550/cf76c28f74ee4c1ba53a8568d4a11814 [2024-06-28 03:16:28,388 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:16:28,388 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:16:28,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix033.opt.yml/witness.yml [2024-06-28 03:16:28,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:16:28,509 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:16:28,509 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:16:28,509 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:16:28,513 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:16:28,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:16:28" (1/2) ... [2024-06-28 03:16:28,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a4dc317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:16:28, skipping insertion in model container [2024-06-28 03:16:28,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:16:28" (1/2) ... [2024-06-28 03:16:28,516 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@81c2fe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:16:28, skipping insertion in model container [2024-06-28 03:16:28,517 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:16:28" (2/2) ... [2024-06-28 03:16:28,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a4dc317 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:16:28, skipping insertion in model container [2024-06-28 03:16:28,517 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:16:28" (2/2) ... [2024-06-28 03:16:28,517 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:16:28,605 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:16:28,606 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((((! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-28 03:16:28,606 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-28 03:16:28,607 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((((! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-28 03:16:28,607 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:16:28,607 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-28 03:16:28,642 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:16:28,876 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:16:28,883 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:16:28,984 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:16:29,008 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:16:29,008 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:16:29 WrapperNode [2024-06-28 03:16:29,008 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:16:29,009 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:16:29,009 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:16:29,009 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:16:29,014 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 28.06 03:16:29" (1/1) ... [2024-06-28 03:16:29,025 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 28.06 03:16:29" (1/1) ... [2024-06-28 03:16:29,055 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 135 [2024-06-28 03:16:29,056 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:16:29,056 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:16:29,056 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:16:29,056 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:16:29,064 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:16:29" (1/1) ... [2024-06-28 03:16:29,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:16:29" (1/1) ... [2024-06-28 03:16:29,067 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:16:29" (1/1) ... [2024-06-28 03:16:29,079 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-28 03:16:29,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:16:29" (1/1) ... [2024-06-28 03:16:29,080 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:16:29" (1/1) ... [2024-06-28 03:16:29,097 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:16:29" (1/1) ... [2024-06-28 03:16:29,105 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:16:29" (1/1) ... [2024-06-28 03:16:29,107 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:16:29" (1/1) ... [2024-06-28 03:16:29,108 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:16:29" (1/1) ... [2024-06-28 03:16:29,111 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:16:29,117 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:16:29,117 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:16:29,117 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:16:29,118 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:16:29" (1/1) ... [2024-06-28 03:16:29,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:16:29,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:16:29,197 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) [2024-06-28 03:16:29,220 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 [2024-06-28 03:16:29,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:16:29,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:16:29,230 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:16:29,230 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:16:29,230 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:16:29,230 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:16:29,230 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:16:29,230 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:16:29,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:16:29,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:16:29,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:16:29,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:16:29,232 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:16:29,341 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:16:29,343 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:16:29,673 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:16:29,674 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:16:29,790 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:16:29,790 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:16:29,791 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:16:29 BoogieIcfgContainer [2024-06-28 03:16:29,791 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:16:29,794 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:16:29,794 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:16:29,797 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:16:29,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:16:28" (1/4) ... [2024-06-28 03:16:29,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ea599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:16:29, skipping insertion in model container [2024-06-28 03:16:29,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:16:28" (2/4) ... [2024-06-28 03:16:29,798 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ea599 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:16:29, skipping insertion in model container [2024-06-28 03:16:29,798 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:16:29" (3/4) ... [2024-06-28 03:16:29,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34ea599 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:16:29, skipping insertion in model container [2024-06-28 03:16:29,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:16:29" (4/4) ... [2024-06-28 03:16:29,800 INFO L112 eAbstractionObserver]: Analyzing ICFG mix033.opt.i [2024-06-28 03:16:29,813 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:16:29,814 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:16:29,814 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:16:29,858 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:16:29,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-28 03:16:29,916 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-28 03:16:29,916 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:16:29,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:16:29,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-28 03:16:29,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-28 03:16:29,931 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:16:29,937 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;@35d7b081, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:16:29,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:16:29,944 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:16:29,944 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:16:29,944 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:16:29,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:29,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:16:29,945 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:29,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash 368421363, now seen corresponding path program 1 times [2024-06-28 03:16:29,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:29,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958746907] [2024-06-28 03:16:29,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:29,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:30,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:30,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958746907] [2024-06-28 03:16:30,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958746907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:30,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:30,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:16:30,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235821537] [2024-06-28 03:16:30,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:30,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:16:30,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:30,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:16:30,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:16:31,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-28 03:16:31,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:31,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:31,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-28 03:16:31,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:31,335 INFO L124 PetriNetUnfolderBase]: 1359/2199 cut-off events. [2024-06-28 03:16:31,336 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-28 03:16:31,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4313 conditions, 2199 events. 1359/2199 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11527 event pairs, 941 based on Foata normal form. 1/2116 useless extension candidates. Maximal degree in co-relation 4301. Up to 2029 conditions per place. [2024-06-28 03:16:31,351 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-28 03:16:31,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 177 flow [2024-06-28 03:16:31,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:16:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:16:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-28 03:16:31,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-28 03:16:31,363 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 84 transitions. [2024-06-28 03:16:31,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 177 flow [2024-06-28 03:16:31,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:16:31,370 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-28 03:16:31,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-28 03:16:31,374 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-28 03:16:31,374 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-28 03:16:31,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:31,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:31,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:31,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:16:31,375 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:31,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:31,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1865755786, now seen corresponding path program 1 times [2024-06-28 03:16:31,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:31,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840430021] [2024-06-28 03:16:31,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:31,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:32,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:32,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840430021] [2024-06-28 03:16:32,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840430021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:32,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:32,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:16:32,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109929310] [2024-06-28 03:16:32,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:32,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:16:32,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:32,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:16:32,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:16:32,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-28 03:16:32,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:32,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:32,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-28 03:16:32,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:32,420 INFO L124 PetriNetUnfolderBase]: 1560/2437 cut-off events. [2024-06-28 03:16:32,421 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-06-28 03:16:32,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5453 conditions, 2437 events. 1560/2437 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12451 event pairs, 930 based on Foata normal form. 3/2405 useless extension candidates. Maximal degree in co-relation 5441. Up to 2302 conditions per place. [2024-06-28 03:16:32,432 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 40 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-28 03:16:32,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 246 flow [2024-06-28 03:16:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:16:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:16:32,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-28 03:16:32,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-28 03:16:32,434 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 106 transitions. [2024-06-28 03:16:32,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 246 flow [2024-06-28 03:16:32,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:16:32,436 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-28 03:16:32,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-28 03:16:32,437 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-28 03:16:32,437 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-28 03:16:32,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:32,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:32,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:32,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:16:32,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:32,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:32,438 INFO L85 PathProgramCache]: Analyzing trace with hash 2003855482, now seen corresponding path program 1 times [2024-06-28 03:16:32,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:32,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204649407] [2024-06-28 03:16:32,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:32,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:33,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:33,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204649407] [2024-06-28 03:16:33,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204649407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:33,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:33,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 03:16:33,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079622071] [2024-06-28 03:16:33,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:33,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 03:16:33,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:33,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 03:16:33,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 03:16:33,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-28 03:16:33,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:33,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:33,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-28 03:16:33,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:33,601 INFO L124 PetriNetUnfolderBase]: 1568/2497 cut-off events. [2024-06-28 03:16:33,602 INFO L125 PetriNetUnfolderBase]: For 1343/1343 co-relation queries the response was YES. [2024-06-28 03:16:33,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6130 conditions, 2497 events. 1568/2497 cut-off events. For 1343/1343 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13125 event pairs, 669 based on Foata normal form. 5/2485 useless extension candidates. Maximal degree in co-relation 6116. Up to 2248 conditions per place. [2024-06-28 03:16:33,612 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 53 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-28 03:16:33,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 400 flow [2024-06-28 03:16:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:16:33,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:16:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-28 03:16:33,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-06-28 03:16:33,615 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 138 transitions. [2024-06-28 03:16:33,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 400 flow [2024-06-28 03:16:33,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 03:16:33,618 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 241 flow [2024-06-28 03:16:33,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-06-28 03:16:33,618 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-28 03:16:33,619 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 241 flow [2024-06-28 03:16:33,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:33,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:33,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:33,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:16:33,619 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:33,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:33,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1875696655, now seen corresponding path program 1 times [2024-06-28 03:16:33,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:33,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166897987] [2024-06-28 03:16:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:33,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:34,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:34,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166897987] [2024-06-28 03:16:34,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166897987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:34,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:34,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:16:34,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944178507] [2024-06-28 03:16:34,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:34,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:16:34,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:34,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:16:34,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:16:34,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-28 03:16:34,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:34,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:34,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-28 03:16:34,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:34,997 INFO L124 PetriNetUnfolderBase]: 1580/2517 cut-off events. [2024-06-28 03:16:34,998 INFO L125 PetriNetUnfolderBase]: For 3179/3181 co-relation queries the response was YES. [2024-06-28 03:16:35,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7274 conditions, 2517 events. 1580/2517 cut-off events. For 3179/3181 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13210 event pairs, 481 based on Foata normal form. 12/2512 useless extension candidates. Maximal degree in co-relation 7257. Up to 2216 conditions per place. [2024-06-28 03:16:35,010 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 57 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-28 03:16:35,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 503 flow [2024-06-28 03:16:35,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:16:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:16:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-28 03:16:35,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-28 03:16:35,014 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 241 flow. Second operand 6 states and 159 transitions. [2024-06-28 03:16:35,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 503 flow [2024-06-28 03:16:35,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 84 transitions, 495 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-28 03:16:35,020 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-28 03:16:35,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-28 03:16:35,022 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-06-28 03:16:35,022 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-28 03:16:35,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:35,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:35,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:35,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:16:35,023 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:35,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:35,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1953014575, now seen corresponding path program 1 times [2024-06-28 03:16:35,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:35,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39787471] [2024-06-28 03:16:35,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:35,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:35,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:35,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39787471] [2024-06-28 03:16:35,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39787471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:35,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:35,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:16:35,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829002666] [2024-06-28 03:16:35,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:35,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:16:35,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:16:35,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:16:35,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-28 03:16:35,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:35,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:35,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-28 03:16:35,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:36,165 INFO L124 PetriNetUnfolderBase]: 1368/2246 cut-off events. [2024-06-28 03:16:36,166 INFO L125 PetriNetUnfolderBase]: For 4097/4097 co-relation queries the response was YES. [2024-06-28 03:16:36,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7017 conditions, 2246 events. 1368/2246 cut-off events. For 4097/4097 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 12065 event pairs, 562 based on Foata normal form. 2/2213 useless extension candidates. Maximal degree in co-relation 6996. Up to 2036 conditions per place. [2024-06-28 03:16:36,179 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 49 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2024-06-28 03:16:36,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 439 flow [2024-06-28 03:16:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:16:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:16:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-28 03:16:36,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:16:36,181 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 5 states and 110 transitions. [2024-06-28 03:16:36,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 439 flow [2024-06-28 03:16:36,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 389 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:36,217 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 271 flow [2024-06-28 03:16:36,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-28 03:16:36,218 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-28 03:16:36,218 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 271 flow [2024-06-28 03:16:36,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:36,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:36,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:36,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:16:36,219 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:36,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:36,219 INFO L85 PathProgramCache]: Analyzing trace with hash 412930851, now seen corresponding path program 1 times [2024-06-28 03:16:36,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:36,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067862253] [2024-06-28 03:16:36,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:36,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:36,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:36,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067862253] [2024-06-28 03:16:36,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067862253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:36,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:36,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:16:36,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137248084] [2024-06-28 03:16:36,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:36,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:16:36,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:36,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:16:36,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:16:36,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:16:36,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 271 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:36,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:36,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:16:36,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:37,481 INFO L124 PetriNetUnfolderBase]: 1606/2615 cut-off events. [2024-06-28 03:16:37,482 INFO L125 PetriNetUnfolderBase]: For 5550/5550 co-relation queries the response was YES. [2024-06-28 03:16:37,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8115 conditions, 2615 events. 1606/2615 cut-off events. For 5550/5550 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13935 event pairs, 676 based on Foata normal form. 2/2594 useless extension candidates. Maximal degree in co-relation 8092. Up to 2373 conditions per place. [2024-06-28 03:16:37,502 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 54 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-28 03:16:37,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 457 flow [2024-06-28 03:16:37,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:16:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:16:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-28 03:16:37,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-28 03:16:37,503 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 271 flow. Second operand 6 states and 125 transitions. [2024-06-28 03:16:37,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 457 flow [2024-06-28 03:16:37,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 435 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:37,508 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 303 flow [2024-06-28 03:16:37,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-28 03:16:37,511 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-28 03:16:37,511 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 303 flow [2024-06-28 03:16:37,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:37,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:37,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:37,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:16:37,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:37,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:37,512 INFO L85 PathProgramCache]: Analyzing trace with hash -60128702, now seen corresponding path program 1 times [2024-06-28 03:16:37,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:37,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603399626] [2024-06-28 03:16:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:37,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:38,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:38,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603399626] [2024-06-28 03:16:38,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603399626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:38,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:38,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:16:38,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749655757] [2024-06-28 03:16:38,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:38,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:16:38,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:16:38,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:16:38,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:16:38,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:38,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:38,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:16:38,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:38,868 INFO L124 PetriNetUnfolderBase]: 1746/2777 cut-off events. [2024-06-28 03:16:38,868 INFO L125 PetriNetUnfolderBase]: For 8534/8538 co-relation queries the response was YES. [2024-06-28 03:16:38,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9396 conditions, 2777 events. 1746/2777 cut-off events. For 8534/8538 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14611 event pairs, 726 based on Foata normal form. 8/2773 useless extension candidates. Maximal degree in co-relation 9373. Up to 2505 conditions per place. [2024-06-28 03:16:38,885 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 53 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-28 03:16:38,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 543 flow [2024-06-28 03:16:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:16:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:16:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-28 03:16:38,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-06-28 03:16:38,887 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 303 flow. Second operand 6 states and 134 transitions. [2024-06-28 03:16:38,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 543 flow [2024-06-28 03:16:38,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 513 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:38,891 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 345 flow [2024-06-28 03:16:38,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-28 03:16:38,893 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-28 03:16:38,893 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 345 flow [2024-06-28 03:16:38,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:38,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:38,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:38,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:16:38,894 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:38,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:38,894 INFO L85 PathProgramCache]: Analyzing trace with hash -53665202, now seen corresponding path program 2 times [2024-06-28 03:16:38,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:38,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324991701] [2024-06-28 03:16:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:38,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:39,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:39,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324991701] [2024-06-28 03:16:39,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324991701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:39,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:39,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:16:39,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775405464] [2024-06-28 03:16:39,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:39,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:16:39,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:39,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:16:39,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:16:39,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:16:39,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:39,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:39,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:16:39,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:40,087 INFO L124 PetriNetUnfolderBase]: 1734/2750 cut-off events. [2024-06-28 03:16:40,087 INFO L125 PetriNetUnfolderBase]: For 10309/10309 co-relation queries the response was YES. [2024-06-28 03:16:40,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9632 conditions, 2750 events. 1734/2750 cut-off events. For 10309/10309 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14424 event pairs, 740 based on Foata normal form. 2/2739 useless extension candidates. Maximal degree in co-relation 9608. Up to 2489 conditions per place. [2024-06-28 03:16:40,101 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 47 selfloop transitions, 20 changer transitions 0/75 dead transitions. [2024-06-28 03:16:40,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 517 flow [2024-06-28 03:16:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:16:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:16:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-28 03:16:40,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-28 03:16:40,103 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 345 flow. Second operand 6 states and 130 transitions. [2024-06-28 03:16:40,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 517 flow [2024-06-28 03:16:40,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 488 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:16:40,110 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 364 flow [2024-06-28 03:16:40,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=364, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-06-28 03:16:40,113 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-28 03:16:40,113 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 364 flow [2024-06-28 03:16:40,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:40,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:40,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:40,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:16:40,114 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:40,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:40,114 INFO L85 PathProgramCache]: Analyzing trace with hash -998329876, now seen corresponding path program 1 times [2024-06-28 03:16:40,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:40,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481217978] [2024-06-28 03:16:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:40,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:40,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:40,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:40,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481217978] [2024-06-28 03:16:40,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481217978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:40,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:40,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:40,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351504991] [2024-06-28 03:16:40,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:40,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:40,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:40,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:40,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:41,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:16:41,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 364 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:41,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:41,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:16:41,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:41,540 INFO L124 PetriNetUnfolderBase]: 1590/2610 cut-off events. [2024-06-28 03:16:41,540 INFO L125 PetriNetUnfolderBase]: For 10273/10273 co-relation queries the response was YES. [2024-06-28 03:16:41,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9112 conditions, 2610 events. 1590/2610 cut-off events. For 10273/10273 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 14019 event pairs, 634 based on Foata normal form. 4/2603 useless extension candidates. Maximal degree in co-relation 9087. Up to 2330 conditions per place. [2024-06-28 03:16:41,554 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 62 selfloop transitions, 14 changer transitions 0/83 dead transitions. [2024-06-28 03:16:41,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 588 flow [2024-06-28 03:16:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:41,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:41,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-28 03:16:41,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-28 03:16:41,556 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 364 flow. Second operand 7 states and 145 transitions. [2024-06-28 03:16:41,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 588 flow [2024-06-28 03:16:41,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 523 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:41,568 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 363 flow [2024-06-28 03:16:41,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=363, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-28 03:16:41,569 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-28 03:16:41,569 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 363 flow [2024-06-28 03:16:41,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:41,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:41,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:41,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:16:41,570 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:41,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:41,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1060831230, now seen corresponding path program 1 times [2024-06-28 03:16:41,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:41,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359572697] [2024-06-28 03:16:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:41,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:42,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:42,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359572697] [2024-06-28 03:16:42,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359572697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:42,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:42,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:42,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230558606] [2024-06-28 03:16:42,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:42,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:42,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:42,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:42,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:42,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:16:42,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:42,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:42,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:16:42,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:43,010 INFO L124 PetriNetUnfolderBase]: 1856/2895 cut-off events. [2024-06-28 03:16:43,011 INFO L125 PetriNetUnfolderBase]: For 14786/14790 co-relation queries the response was YES. [2024-06-28 03:16:43,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10876 conditions, 2895 events. 1856/2895 cut-off events. For 14786/14790 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14760 event pairs, 731 based on Foata normal form. 8/2890 useless extension candidates. Maximal degree in co-relation 10850. Up to 2601 conditions per place. [2024-06-28 03:16:43,026 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 63 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-28 03:16:43,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 693 flow [2024-06-28 03:16:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 03:16:43,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-28 03:16:43,028 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 363 flow. Second operand 7 states and 150 transitions. [2024-06-28 03:16:43,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 693 flow [2024-06-28 03:16:43,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 653 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 03:16:43,034 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 442 flow [2024-06-28 03:16:43,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=442, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-28 03:16:43,035 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-28 03:16:43,035 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 442 flow [2024-06-28 03:16:43,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:43,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:43,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:43,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:16:43,036 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:43,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:43,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1663619872, now seen corresponding path program 2 times [2024-06-28 03:16:43,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:43,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860178578] [2024-06-28 03:16:43,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:43,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:43,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:43,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860178578] [2024-06-28 03:16:43,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860178578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:43,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:43,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:43,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129262383] [2024-06-28 03:16:43,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:43,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:43,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:43,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:43,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:43,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:16:43,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 442 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:43,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:43,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:16:43,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:44,351 INFO L124 PetriNetUnfolderBase]: 1867/2907 cut-off events. [2024-06-28 03:16:44,351 INFO L125 PetriNetUnfolderBase]: For 18378/18378 co-relation queries the response was YES. [2024-06-28 03:16:44,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11745 conditions, 2907 events. 1867/2907 cut-off events. For 18378/18378 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14829 event pairs, 745 based on Foata normal form. 2/2895 useless extension candidates. Maximal degree in co-relation 11718. Up to 2608 conditions per place. [2024-06-28 03:16:44,367 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 60 selfloop transitions, 33 changer transitions 0/99 dead transitions. [2024-06-28 03:16:44,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 824 flow [2024-06-28 03:16:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:44,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-28 03:16:44,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-28 03:16:44,368 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 442 flow. Second operand 7 states and 150 transitions. [2024-06-28 03:16:44,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 824 flow [2024-06-28 03:16:44,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 788 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 03:16:44,376 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 542 flow [2024-06-28 03:16:44,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-28 03:16:44,376 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-28 03:16:44,377 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 542 flow [2024-06-28 03:16:44,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:44,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:44,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:44,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:16:44,377 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:44,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:44,378 INFO L85 PathProgramCache]: Analyzing trace with hash -883462560, now seen corresponding path program 3 times [2024-06-28 03:16:44,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:44,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128240927] [2024-06-28 03:16:44,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:44,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:44,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:45,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:45,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128240927] [2024-06-28 03:16:45,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128240927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:45,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:45,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:45,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843717216] [2024-06-28 03:16:45,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:45,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:45,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:45,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:45,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:16:45,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:45,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:45,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:16:45,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:45,719 INFO L124 PetriNetUnfolderBase]: 1862/2900 cut-off events. [2024-06-28 03:16:45,719 INFO L125 PetriNetUnfolderBase]: For 21727/21727 co-relation queries the response was YES. [2024-06-28 03:16:45,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12205 conditions, 2900 events. 1862/2900 cut-off events. For 21727/21727 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14784 event pairs, 745 based on Foata normal form. 2/2888 useless extension candidates. Maximal degree in co-relation 12176. Up to 2605 conditions per place. [2024-06-28 03:16:45,733 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 57 selfloop transitions, 34 changer transitions 0/97 dead transitions. [2024-06-28 03:16:45,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 820 flow [2024-06-28 03:16:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-28 03:16:45,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-28 03:16:45,734 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 542 flow. Second operand 7 states and 148 transitions. [2024-06-28 03:16:45,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 820 flow [2024-06-28 03:16:45,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 765 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-28 03:16:45,744 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 563 flow [2024-06-28 03:16:45,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=563, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-06-28 03:16:45,745 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-28 03:16:45,745 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 563 flow [2024-06-28 03:16:45,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:45,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:45,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:45,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:16:45,746 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:45,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:45,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1752323353, now seen corresponding path program 1 times [2024-06-28 03:16:45,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:45,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740525285] [2024-06-28 03:16:45,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:45,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:46,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:46,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:46,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740525285] [2024-06-28 03:16:46,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740525285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:46,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:46,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:16:46,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89806411] [2024-06-28 03:16:46,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:46,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:16:46,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:46,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:16:46,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:16:46,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-28 03:16:46,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 563 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:46,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:46,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-28 03:16:46,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:46,795 INFO L124 PetriNetUnfolderBase]: 1534/2560 cut-off events. [2024-06-28 03:16:46,795 INFO L125 PetriNetUnfolderBase]: For 20440/20440 co-relation queries the response was YES. [2024-06-28 03:16:46,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10683 conditions, 2560 events. 1534/2560 cut-off events. For 20440/20440 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13956 event pairs, 581 based on Foata normal form. 1/2548 useless extension candidates. Maximal degree in co-relation 10651. Up to 2252 conditions per place. [2024-06-28 03:16:46,807 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 66 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-06-28 03:16:46,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 753 flow [2024-06-28 03:16:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:16:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:16:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-28 03:16:46,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-28 03:16:46,809 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 563 flow. Second operand 5 states and 106 transitions. [2024-06-28 03:16:46,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 753 flow [2024-06-28 03:16:46,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 665 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 03:16:46,820 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 525 flow [2024-06-28 03:16:46,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=525, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-28 03:16:46,821 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-28 03:16:46,821 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 525 flow [2024-06-28 03:16:46,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:46,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:46,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:46,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:16:46,822 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:46,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:46,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1641438136, now seen corresponding path program 1 times [2024-06-28 03:16:46,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:46,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074090143] [2024-06-28 03:16:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:46,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:47,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:47,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074090143] [2024-06-28 03:16:47,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074090143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:47,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:47,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:47,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017302862] [2024-06-28 03:16:47,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:47,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:47,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:47,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:47,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:47,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:16:47,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 525 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-28 03:16:47,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:47,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:16:47,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:48,229 INFO L124 PetriNetUnfolderBase]: 1870/2921 cut-off events. [2024-06-28 03:16:48,230 INFO L125 PetriNetUnfolderBase]: For 27028/27032 co-relation queries the response was YES. [2024-06-28 03:16:48,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12838 conditions, 2921 events. 1870/2921 cut-off events. For 27028/27032 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14947 event pairs, 730 based on Foata normal form. 6/2927 useless extension candidates. Maximal degree in co-relation 12806. Up to 2613 conditions per place. [2024-06-28 03:16:48,242 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 67 selfloop transitions, 36 changer transitions 0/109 dead transitions. [2024-06-28 03:16:48,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 883 flow [2024-06-28 03:16:48,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-28 03:16:48,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967532467532468 [2024-06-28 03:16:48,243 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 525 flow. Second operand 7 states and 153 transitions. [2024-06-28 03:16:48,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 883 flow [2024-06-28 03:16:48,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 855 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 03:16:48,254 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 611 flow [2024-06-28 03:16:48,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=611, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2024-06-28 03:16:48,254 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-28 03:16:48,255 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 611 flow [2024-06-28 03:16:48,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-28 03:16:48,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:48,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:48,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:16:48,255 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:48,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1641432339, now seen corresponding path program 1 times [2024-06-28 03:16:48,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:48,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350850445] [2024-06-28 03:16:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:48,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:49,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:49,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350850445] [2024-06-28 03:16:49,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350850445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:49,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:49,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:49,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662058178] [2024-06-28 03:16:49,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:49,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:49,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:49,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:49,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:49,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:16:49,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 611 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:49,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:49,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:16:49,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:49,940 INFO L124 PetriNetUnfolderBase]: 1914/2996 cut-off events. [2024-06-28 03:16:49,940 INFO L125 PetriNetUnfolderBase]: For 31282/31286 co-relation queries the response was YES. [2024-06-28 03:16:49,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13498 conditions, 2996 events. 1914/2996 cut-off events. For 31282/31286 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15464 event pairs, 638 based on Foata normal form. 9/3005 useless extension candidates. Maximal degree in co-relation 13465. Up to 2529 conditions per place. [2024-06-28 03:16:49,954 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 77 selfloop transitions, 38 changer transitions 0/121 dead transitions. [2024-06-28 03:16:49,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 121 transitions, 1039 flow [2024-06-28 03:16:49,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-28 03:16:49,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2024-06-28 03:16:49,955 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 611 flow. Second operand 8 states and 174 transitions. [2024-06-28 03:16:49,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 121 transitions, 1039 flow [2024-06-28 03:16:49,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 121 transitions, 928 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 03:16:49,971 INFO L231 Difference]: Finished difference. Result has 82 places, 89 transitions, 653 flow [2024-06-28 03:16:49,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=653, PETRI_PLACES=82, PETRI_TRANSITIONS=89} [2024-06-28 03:16:49,971 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2024-06-28 03:16:49,971 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 89 transitions, 653 flow [2024-06-28 03:16:49,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:49,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:49,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:49,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:16:49,972 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:49,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:49,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1949063480, now seen corresponding path program 2 times [2024-06-28 03:16:49,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:49,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75774238] [2024-06-28 03:16:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:49,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:50,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:50,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75774238] [2024-06-28 03:16:50,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75774238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:50,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:50,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:50,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52298024] [2024-06-28 03:16:50,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:50,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:50,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:50,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:50,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:16:50,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 89 transitions, 653 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-28 03:16:50,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:50,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:16:50,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:51,336 INFO L124 PetriNetUnfolderBase]: 1925/3017 cut-off events. [2024-06-28 03:16:51,336 INFO L125 PetriNetUnfolderBase]: For 35490/35492 co-relation queries the response was YES. [2024-06-28 03:16:51,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14355 conditions, 3017 events. 1925/3017 cut-off events. For 35490/35492 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15572 event pairs, 696 based on Foata normal form. 4/3021 useless extension candidates. Maximal degree in co-relation 14322. Up to 2689 conditions per place. [2024-06-28 03:16:51,352 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 74 selfloop transitions, 36 changer transitions 0/116 dead transitions. [2024-06-28 03:16:51,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 116 transitions, 1026 flow [2024-06-28 03:16:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:51,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-28 03:16:51,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4837662337662338 [2024-06-28 03:16:51,353 INFO L175 Difference]: Start difference. First operand has 82 places, 89 transitions, 653 flow. Second operand 7 states and 149 transitions. [2024-06-28 03:16:51,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 116 transitions, 1026 flow [2024-06-28 03:16:51,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 977 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:51,370 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 720 flow [2024-06-28 03:16:51,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=720, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2024-06-28 03:16:51,371 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-28 03:16:51,371 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 720 flow [2024-06-28 03:16:51,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-28 03:16:51,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:51,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:51,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:16:51,371 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:51,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2017714575, now seen corresponding path program 2 times [2024-06-28 03:16:51,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:51,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850865304] [2024-06-28 03:16:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:51,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:52,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:52,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850865304] [2024-06-28 03:16:52,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850865304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:52,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:52,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:52,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5370606] [2024-06-28 03:16:52,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:52,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:52,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:52,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:52,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:52,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:16:52,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 720 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:52,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:52,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:16:52,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:53,065 INFO L124 PetriNetUnfolderBase]: 1947/3032 cut-off events. [2024-06-28 03:16:53,065 INFO L125 PetriNetUnfolderBase]: For 40337/40337 co-relation queries the response was YES. [2024-06-28 03:16:53,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14784 conditions, 3032 events. 1947/3032 cut-off events. For 40337/40337 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15499 event pairs, 662 based on Foata normal form. 4/3035 useless extension candidates. Maximal degree in co-relation 14749. Up to 2545 conditions per place. [2024-06-28 03:16:53,080 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 70 selfloop transitions, 52 changer transitions 0/128 dead transitions. [2024-06-28 03:16:53,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 128 transitions, 1228 flow [2024-06-28 03:16:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:53,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-28 03:16:53,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2024-06-28 03:16:53,081 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 720 flow. Second operand 8 states and 174 transitions. [2024-06-28 03:16:53,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 128 transitions, 1228 flow [2024-06-28 03:16:53,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 128 transitions, 1162 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:53,097 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 836 flow [2024-06-28 03:16:53,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=836, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2024-06-28 03:16:53,098 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-28 03:16:53,098 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 836 flow [2024-06-28 03:16:53,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:53,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:53,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:53,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:16:53,099 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:53,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:53,099 INFO L85 PathProgramCache]: Analyzing trace with hash 830631803, now seen corresponding path program 3 times [2024-06-28 03:16:53,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:53,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631838495] [2024-06-28 03:16:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:53,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:53,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:53,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631838495] [2024-06-28 03:16:53,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631838495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:53,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:53,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:53,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706329130] [2024-06-28 03:16:53,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:53,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:53,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:53,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:53,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:54,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:16:54,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 836 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:54,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:54,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:16:54,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:54,692 INFO L124 PetriNetUnfolderBase]: 1969/3069 cut-off events. [2024-06-28 03:16:54,692 INFO L125 PetriNetUnfolderBase]: For 45828/45828 co-relation queries the response was YES. [2024-06-28 03:16:54,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15504 conditions, 3069 events. 1969/3069 cut-off events. For 45828/45828 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15763 event pairs, 662 based on Foata normal form. 4/3072 useless extension candidates. Maximal degree in co-relation 15468. Up to 2554 conditions per place. [2024-06-28 03:16:54,709 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 73 selfloop transitions, 53 changer transitions 0/132 dead transitions. [2024-06-28 03:16:54,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 1334 flow [2024-06-28 03:16:54,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:54,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-28 03:16:54,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971590909090909 [2024-06-28 03:16:54,712 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 836 flow. Second operand 8 states and 175 transitions. [2024-06-28 03:16:54,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 1334 flow [2024-06-28 03:16:54,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 132 transitions, 1240 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 03:16:54,737 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 896 flow [2024-06-28 03:16:54,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=896, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-06-28 03:16:54,738 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2024-06-28 03:16:54,738 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 896 flow [2024-06-28 03:16:54,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:54,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:54,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:54,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:16:54,739 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:54,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:54,739 INFO L85 PathProgramCache]: Analyzing trace with hash 969406344, now seen corresponding path program 3 times [2024-06-28 03:16:54,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:54,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900161252] [2024-06-28 03:16:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:54,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:55,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:55,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900161252] [2024-06-28 03:16:55,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900161252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:55,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:55,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:55,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326811748] [2024-06-28 03:16:55,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:55,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:55,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:55,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:55,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:55,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:16:55,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 896 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-28 03:16:55,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:55,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:16:55,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:56,203 INFO L124 PetriNetUnfolderBase]: 1964/3085 cut-off events. [2024-06-28 03:16:56,203 INFO L125 PetriNetUnfolderBase]: For 49465/49467 co-relation queries the response was YES. [2024-06-28 03:16:56,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15615 conditions, 3085 events. 1964/3085 cut-off events. For 49465/49467 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16033 event pairs, 722 based on Foata normal form. 4/3088 useless extension candidates. Maximal degree in co-relation 15577. Up to 2748 conditions per place. [2024-06-28 03:16:56,219 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 80 selfloop transitions, 34 changer transitions 0/120 dead transitions. [2024-06-28 03:16:56,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 120 transitions, 1172 flow [2024-06-28 03:16:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:16:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:16:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-28 03:16:56,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 03:16:56,221 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 896 flow. Second operand 7 states and 143 transitions. [2024-06-28 03:16:56,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 120 transitions, 1172 flow [2024-06-28 03:16:56,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 120 transitions, 1060 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 03:16:56,253 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 860 flow [2024-06-28 03:16:56,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2024-06-28 03:16:56,253 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 50 predicate places. [2024-06-28 03:16:56,253 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 860 flow [2024-06-28 03:16:56,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 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) [2024-06-28 03:16:56,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:56,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:56,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:16:56,254 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:56,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:56,255 INFO L85 PathProgramCache]: Analyzing trace with hash -32607059, now seen corresponding path program 4 times [2024-06-28 03:16:56,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:56,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566563562] [2024-06-28 03:16:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:56,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:57,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:57,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566563562] [2024-06-28 03:16:57,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566563562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:57,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:57,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:16:57,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657144668] [2024-06-28 03:16:57,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:57,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:16:57,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:57,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:16:57,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:16:57,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:16:57,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 860 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:57,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:57,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:16:57,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:57,856 INFO L124 PetriNetUnfolderBase]: 1954/3047 cut-off events. [2024-06-28 03:16:57,856 INFO L125 PetriNetUnfolderBase]: For 53325/53325 co-relation queries the response was YES. [2024-06-28 03:16:57,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15530 conditions, 3047 events. 1954/3047 cut-off events. For 53325/53325 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15661 event pairs, 658 based on Foata normal form. 4/3050 useless extension candidates. Maximal degree in co-relation 15491. Up to 2547 conditions per place. [2024-06-28 03:16:57,870 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 72 selfloop transitions, 52 changer transitions 0/130 dead transitions. [2024-06-28 03:16:57,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1252 flow [2024-06-28 03:16:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:16:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:16:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-28 03:16:57,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4914772727272727 [2024-06-28 03:16:57,872 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 860 flow. Second operand 8 states and 173 transitions. [2024-06-28 03:16:57,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1252 flow [2024-06-28 03:16:57,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 130 transitions, 1139 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 03:16:57,897 INFO L231 Difference]: Finished difference. Result has 96 places, 101 transitions, 859 flow [2024-06-28 03:16:57,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=859, PETRI_PLACES=96, PETRI_TRANSITIONS=101} [2024-06-28 03:16:57,898 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-28 03:16:57,898 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 101 transitions, 859 flow [2024-06-28 03:16:57,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:16:57,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:57,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:57,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:16:57,899 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:57,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:57,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1493783763, now seen corresponding path program 1 times [2024-06-28 03:16:57,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:57,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17425824] [2024-06-28 03:16:57,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:57,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:58,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:58,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17425824] [2024-06-28 03:16:58,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17425824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:58,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:58,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:16:58,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175889549] [2024-06-28 03:16:58,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:58,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:16:58,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:58,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:16:58,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:16:58,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:16:58,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 101 transitions, 859 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-28 03:16:58,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:58,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:16:58,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:16:59,029 INFO L124 PetriNetUnfolderBase]: 1845/2972 cut-off events. [2024-06-28 03:16:59,029 INFO L125 PetriNetUnfolderBase]: For 56981/56981 co-relation queries the response was YES. [2024-06-28 03:16:59,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15391 conditions, 2972 events. 1845/2972 cut-off events. For 56981/56981 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15843 event pairs, 649 based on Foata normal form. 1/2973 useless extension candidates. Maximal degree in co-relation 15351. Up to 2703 conditions per place. [2024-06-28 03:16:59,046 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 88 selfloop transitions, 11 changer transitions 0/113 dead transitions. [2024-06-28 03:16:59,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 113 transitions, 1105 flow [2024-06-28 03:16:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:16:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:16:59,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-28 03:16:59,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-28 03:16:59,047 INFO L175 Difference]: Start difference. First operand has 96 places, 101 transitions, 859 flow. Second operand 6 states and 118 transitions. [2024-06-28 03:16:59,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 113 transitions, 1105 flow [2024-06-28 03:16:59,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 113 transitions, 962 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 03:16:59,071 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 776 flow [2024-06-28 03:16:59,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=776, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-28 03:16:59,072 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-28 03:16:59,072 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 776 flow [2024-06-28 03:16:59,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-28 03:16:59,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:16:59,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:16:59,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:16:59,072 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:16:59,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:16:59,072 INFO L85 PathProgramCache]: Analyzing trace with hash -296189015, now seen corresponding path program 1 times [2024-06-28 03:16:59,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:16:59,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874542447] [2024-06-28 03:16:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:16:59,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:16:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:16:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:16:59,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:16:59,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874542447] [2024-06-28 03:16:59,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874542447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:16:59,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:16:59,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:16:59,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145687406] [2024-06-28 03:16:59,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:16:59,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:16:59,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:16:59,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:16:59,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:16:59,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:16:59,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 776 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-28 03:16:59,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:16:59,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:16:59,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:00,385 INFO L124 PetriNetUnfolderBase]: 1934/3071 cut-off events. [2024-06-28 03:17:00,385 INFO L125 PetriNetUnfolderBase]: For 71312/71314 co-relation queries the response was YES. [2024-06-28 03:17:00,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16849 conditions, 3071 events. 1934/3071 cut-off events. For 71312/71314 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16354 event pairs, 486 based on Foata normal form. 6/3077 useless extension candidates. Maximal degree in co-relation 16808. Up to 2634 conditions per place. [2024-06-28 03:17:00,404 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 96 selfloop transitions, 23 changer transitions 0/134 dead transitions. [2024-06-28 03:17:00,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 134 transitions, 1206 flow [2024-06-28 03:17:00,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-28 03:17:00,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967532467532468 [2024-06-28 03:17:00,406 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 776 flow. Second operand 7 states and 153 transitions. [2024-06-28 03:17:00,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 134 transitions, 1206 flow [2024-06-28 03:17:00,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1168 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-28 03:17:00,434 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 843 flow [2024-06-28 03:17:00,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=843, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-06-28 03:17:00,434 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-28 03:17:00,434 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 843 flow [2024-06-28 03:17:00,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-28 03:17:00,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:00,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:00,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:17:00,435 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:00,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:00,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1666993243, now seen corresponding path program 2 times [2024-06-28 03:17:00,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:00,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830389983] [2024-06-28 03:17:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:00,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:01,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:01,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830389983] [2024-06-28 03:17:01,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830389983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:01,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:01,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:01,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961257755] [2024-06-28 03:17:01,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:01,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:01,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:01,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:01,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:01,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:01,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 843 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-28 03:17:01,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:01,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:01,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:01,881 INFO L124 PetriNetUnfolderBase]: 1922/3050 cut-off events. [2024-06-28 03:17:01,881 INFO L125 PetriNetUnfolderBase]: For 77303/77305 co-relation queries the response was YES. [2024-06-28 03:17:01,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17221 conditions, 3050 events. 1922/3050 cut-off events. For 77303/77305 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16154 event pairs, 640 based on Foata normal form. 6/3056 useless extension candidates. Maximal degree in co-relation 17179. Up to 2695 conditions per place. [2024-06-28 03:17:01,897 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 95 selfloop transitions, 21 changer transitions 0/131 dead transitions. [2024-06-28 03:17:01,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 131 transitions, 1133 flow [2024-06-28 03:17:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:01,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-28 03:17:01,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4902597402597403 [2024-06-28 03:17:01,898 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 843 flow. Second operand 7 states and 151 transitions. [2024-06-28 03:17:01,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 131 transitions, 1133 flow [2024-06-28 03:17:01,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 131 transitions, 1078 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 03:17:01,939 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 837 flow [2024-06-28 03:17:01,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=837, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2024-06-28 03:17:01,940 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-28 03:17:01,940 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 837 flow [2024-06-28 03:17:01,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 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) [2024-06-28 03:17:01,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:01,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:01,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:17:01,940 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:01,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:01,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1551697113, now seen corresponding path program 1 times [2024-06-28 03:17:01,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:01,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756287230] [2024-06-28 03:17:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:01,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:02,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:02,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756287230] [2024-06-28 03:17:02,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756287230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:02,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:02,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:02,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333343510] [2024-06-28 03:17:02,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:02,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:02,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:02,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:02,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:02,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:02,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 837 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:02,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:02,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:02,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:03,561 INFO L124 PetriNetUnfolderBase]: 2053/3201 cut-off events. [2024-06-28 03:17:03,561 INFO L125 PetriNetUnfolderBase]: For 84058/84060 co-relation queries the response was YES. [2024-06-28 03:17:03,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18133 conditions, 3201 events. 2053/3201 cut-off events. For 84058/84060 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16648 event pairs, 626 based on Foata normal form. 4/3205 useless extension candidates. Maximal degree in co-relation 18089. Up to 2649 conditions per place. [2024-06-28 03:17:03,581 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 84 selfloop transitions, 55 changer transitions 0/146 dead transitions. [2024-06-28 03:17:03,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 146 transitions, 1327 flow [2024-06-28 03:17:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:03,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:03,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-28 03:17:03,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056818181818182 [2024-06-28 03:17:03,582 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 837 flow. Second operand 8 states and 178 transitions. [2024-06-28 03:17:03,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 146 transitions, 1327 flow [2024-06-28 03:17:03,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 146 transitions, 1277 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:03,632 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 943 flow [2024-06-28 03:17:03,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=103, PETRI_TRANSITIONS=111} [2024-06-28 03:17:03,633 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-28 03:17:03,633 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 943 flow [2024-06-28 03:17:03,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:03,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:03,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:03,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:17:03,633 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:03,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:03,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1551517623, now seen corresponding path program 2 times [2024-06-28 03:17:03,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:03,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941427291] [2024-06-28 03:17:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:03,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:04,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:04,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941427291] [2024-06-28 03:17:04,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941427291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:04,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:04,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:04,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343209778] [2024-06-28 03:17:04,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:04,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:04,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:04,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:04,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:04,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:04,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 111 transitions, 943 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:04,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:04,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:04,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:05,326 INFO L124 PetriNetUnfolderBase]: 2107/3294 cut-off events. [2024-06-28 03:17:05,326 INFO L125 PetriNetUnfolderBase]: For 92778/92780 co-relation queries the response was YES. [2024-06-28 03:17:05,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19139 conditions, 3294 events. 2107/3294 cut-off events. For 92778/92780 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17249 event pairs, 628 based on Foata normal form. 4/3298 useless extension candidates. Maximal degree in co-relation 19094. Up to 2695 conditions per place. [2024-06-28 03:17:05,348 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 87 selfloop transitions, 57 changer transitions 0/151 dead transitions. [2024-06-28 03:17:05,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 1585 flow [2024-06-28 03:17:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:05,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-28 03:17:05,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:17:05,349 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 943 flow. Second operand 8 states and 176 transitions. [2024-06-28 03:17:05,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 1585 flow [2024-06-28 03:17:05,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 151 transitions, 1400 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 03:17:05,428 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 969 flow [2024-06-28 03:17:05,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=969, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-06-28 03:17:05,428 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-28 03:17:05,428 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 969 flow [2024-06-28 03:17:05,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:05,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:05,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:05,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:17:05,429 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:05,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:05,429 INFO L85 PathProgramCache]: Analyzing trace with hash 655199737, now seen corresponding path program 3 times [2024-06-28 03:17:05,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:05,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86150718] [2024-06-28 03:17:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:05,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:06,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:06,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86150718] [2024-06-28 03:17:06,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86150718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:06,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:06,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:06,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756747223] [2024-06-28 03:17:06,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:06,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:06,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:06,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:06,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:06,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:06,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 969 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:06,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:06,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:06,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:07,028 INFO L124 PetriNetUnfolderBase]: 2097/3280 cut-off events. [2024-06-28 03:17:07,028 INFO L125 PetriNetUnfolderBase]: For 97813/97815 co-relation queries the response was YES. [2024-06-28 03:17:07,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19158 conditions, 3280 events. 2097/3280 cut-off events. For 97813/97815 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17175 event pairs, 633 based on Foata normal form. 4/3284 useless extension candidates. Maximal degree in co-relation 19113. Up to 2687 conditions per place. [2024-06-28 03:17:07,050 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 87 selfloop transitions, 56 changer transitions 0/150 dead transitions. [2024-06-28 03:17:07,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1431 flow [2024-06-28 03:17:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-28 03:17:07,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:17:07,052 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 969 flow. Second operand 8 states and 176 transitions. [2024-06-28 03:17:07,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1431 flow [2024-06-28 03:17:07,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 150 transitions, 1322 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 03:17:07,099 INFO L231 Difference]: Finished difference. Result has 108 places, 117 transitions, 980 flow [2024-06-28 03:17:07,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=980, PETRI_PLACES=108, PETRI_TRANSITIONS=117} [2024-06-28 03:17:07,100 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-28 03:17:07,100 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 117 transitions, 980 flow [2024-06-28 03:17:07,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:07,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:07,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:07,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:17:07,100 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:07,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:07,101 INFO L85 PathProgramCache]: Analyzing trace with hash -950690736, now seen corresponding path program 1 times [2024-06-28 03:17:07,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:07,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985450608] [2024-06-28 03:17:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:07,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:07,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985450608] [2024-06-28 03:17:07,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985450608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:07,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:07,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:17:07,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807608155] [2024-06-28 03:17:07,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:07,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:17:07,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:07,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:17:07,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:17:07,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:07,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 117 transitions, 980 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-28 03:17:07,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:07,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:07,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:08,231 INFO L124 PetriNetUnfolderBase]: 2018/3202 cut-off events. [2024-06-28 03:17:08,231 INFO L125 PetriNetUnfolderBase]: For 103698/103698 co-relation queries the response was YES. [2024-06-28 03:17:08,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19109 conditions, 3202 events. 2018/3202 cut-off events. For 103698/103698 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17088 event pairs, 650 based on Foata normal form. 1/3203 useless extension candidates. Maximal degree in co-relation 19063. Up to 2897 conditions per place. [2024-06-28 03:17:08,250 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 109 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2024-06-28 03:17:08,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 1286 flow [2024-06-28 03:17:08,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:17:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:17:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-28 03:17:08,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-28 03:17:08,251 INFO L175 Difference]: Start difference. First operand has 108 places, 117 transitions, 980 flow. Second operand 6 states and 124 transitions. [2024-06-28 03:17:08,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 1286 flow [2024-06-28 03:17:08,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 135 transitions, 1161 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 03:17:08,295 INFO L231 Difference]: Finished difference. Result has 107 places, 120 transitions, 917 flow [2024-06-28 03:17:08,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=917, PETRI_PLACES=107, PETRI_TRANSITIONS=120} [2024-06-28 03:17:08,295 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2024-06-28 03:17:08,295 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 120 transitions, 917 flow [2024-06-28 03:17:08,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-28 03:17:08,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:08,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:08,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:17:08,296 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:08,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:08,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1404323913, now seen corresponding path program 4 times [2024-06-28 03:17:08,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:08,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256185869] [2024-06-28 03:17:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:08,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:09,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:09,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256185869] [2024-06-28 03:17:09,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256185869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:09,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:09,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:09,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142650649] [2024-06-28 03:17:09,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:09,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:09,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:09,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:09,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:09,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:09,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 120 transitions, 917 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:09,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:09,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:09,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:09,897 INFO L124 PetriNetUnfolderBase]: 2150/3356 cut-off events. [2024-06-28 03:17:09,897 INFO L125 PetriNetUnfolderBase]: For 111581/111583 co-relation queries the response was YES. [2024-06-28 03:17:09,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20063 conditions, 3356 events. 2150/3356 cut-off events. For 111581/111583 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17584 event pairs, 657 based on Foata normal form. 6/3361 useless extension candidates. Maximal degree in co-relation 20016. Up to 2739 conditions per place. [2024-06-28 03:17:09,917 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 84 selfloop transitions, 60 changer transitions 0/151 dead transitions. [2024-06-28 03:17:09,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 151 transitions, 1413 flow [2024-06-28 03:17:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 03:17:09,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-28 03:17:09,918 INFO L175 Difference]: Start difference. First operand has 107 places, 120 transitions, 917 flow. Second operand 8 states and 168 transitions. [2024-06-28 03:17:09,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 151 transitions, 1413 flow [2024-06-28 03:17:09,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 151 transitions, 1373 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 03:17:09,967 INFO L231 Difference]: Finished difference. Result has 111 places, 123 transitions, 1043 flow [2024-06-28 03:17:09,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1043, PETRI_PLACES=111, PETRI_TRANSITIONS=123} [2024-06-28 03:17:09,967 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-28 03:17:09,967 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 123 transitions, 1043 flow [2024-06-28 03:17:09,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:09,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:09,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:09,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:17:09,968 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:09,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:09,968 INFO L85 PathProgramCache]: Analyzing trace with hash -782916475, now seen corresponding path program 5 times [2024-06-28 03:17:09,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:09,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015591003] [2024-06-28 03:17:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:09,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:10,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:10,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015591003] [2024-06-28 03:17:10,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015591003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:10,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:10,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:10,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968938122] [2024-06-28 03:17:10,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:10,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:10,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:10,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:10,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:10,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 123 transitions, 1043 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:10,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:10,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:10,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:11,562 INFO L124 PetriNetUnfolderBase]: 2172/3393 cut-off events. [2024-06-28 03:17:11,562 INFO L125 PetriNetUnfolderBase]: For 120225/120227 co-relation queries the response was YES. [2024-06-28 03:17:11,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20811 conditions, 3393 events. 2172/3393 cut-off events. For 120225/120227 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17867 event pairs, 652 based on Foata normal form. 6/3398 useless extension candidates. Maximal degree in co-relation 20763. Up to 2758 conditions per place. [2024-06-28 03:17:11,583 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 59 changer transitions 0/155 dead transitions. [2024-06-28 03:17:11,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 155 transitions, 1559 flow [2024-06-28 03:17:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-28 03:17:11,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48579545454545453 [2024-06-28 03:17:11,584 INFO L175 Difference]: Start difference. First operand has 111 places, 123 transitions, 1043 flow. Second operand 8 states and 171 transitions. [2024-06-28 03:17:11,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 155 transitions, 1559 flow [2024-06-28 03:17:11,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 155 transitions, 1433 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:11,648 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 1087 flow [2024-06-28 03:17:11,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1087, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-06-28 03:17:11,649 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-28 03:17:11,649 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 1087 flow [2024-06-28 03:17:11,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:11,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:11,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:11,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:17:11,650 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:11,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:11,650 INFO L85 PathProgramCache]: Analyzing trace with hash -782922985, now seen corresponding path program 6 times [2024-06-28 03:17:11,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:11,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202223920] [2024-06-28 03:17:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:11,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:12,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:12,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202223920] [2024-06-28 03:17:12,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202223920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:12,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:12,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:12,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816336036] [2024-06-28 03:17:12,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:12,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:12,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:12,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:12,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:12,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:12,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 1087 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:12,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:12,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:12,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:13,262 INFO L124 PetriNetUnfolderBase]: 2162/3379 cut-off events. [2024-06-28 03:17:13,262 INFO L125 PetriNetUnfolderBase]: For 126609/126611 co-relation queries the response was YES. [2024-06-28 03:17:13,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20840 conditions, 3379 events. 2162/3379 cut-off events. For 126609/126611 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17707 event pairs, 650 based on Foata normal form. 6/3384 useless extension candidates. Maximal degree in co-relation 20791. Up to 2750 conditions per place. [2024-06-28 03:17:13,284 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 86 selfloop transitions, 60 changer transitions 0/153 dead transitions. [2024-06-28 03:17:13,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 153 transitions, 1445 flow [2024-06-28 03:17:13,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:13,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 03:17:13,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-28 03:17:13,285 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 1087 flow. Second operand 8 states and 168 transitions. [2024-06-28 03:17:13,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 153 transitions, 1445 flow [2024-06-28 03:17:13,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 153 transitions, 1254 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 03:17:13,338 INFO L231 Difference]: Finished difference. Result has 115 places, 126 transitions, 1024 flow [2024-06-28 03:17:13,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1024, PETRI_PLACES=115, PETRI_TRANSITIONS=126} [2024-06-28 03:17:13,338 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-28 03:17:13,339 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 126 transitions, 1024 flow [2024-06-28 03:17:13,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:13,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:13,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:13,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:17:13,339 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:13,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash -937358256, now seen corresponding path program 2 times [2024-06-28 03:17:13,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:13,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908086731] [2024-06-28 03:17:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:13,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:14,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:14,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908086731] [2024-06-28 03:17:14,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908086731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:14,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:14,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:17:14,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204422273] [2024-06-28 03:17:14,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:14,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:17:14,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:14,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:17:14,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:17:14,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:14,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 126 transitions, 1024 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-28 03:17:14,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:14,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:14,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:14,515 INFO L124 PetriNetUnfolderBase]: 2045/3261 cut-off events. [2024-06-28 03:17:14,515 INFO L125 PetriNetUnfolderBase]: For 131999/132005 co-relation queries the response was YES. [2024-06-28 03:17:14,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20531 conditions, 3261 events. 2045/3261 cut-off events. For 131999/132005 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17516 event pairs, 660 based on Foata normal form. 7/3268 useless extension candidates. Maximal degree in co-relation 20481. Up to 2933 conditions per place. [2024-06-28 03:17:14,536 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 107 selfloop transitions, 16 changer transitions 0/138 dead transitions. [2024-06-28 03:17:14,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 138 transitions, 1326 flow [2024-06-28 03:17:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:17:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:17:14,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-28 03:17:14,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-28 03:17:14,537 INFO L175 Difference]: Start difference. First operand has 115 places, 126 transitions, 1024 flow. Second operand 6 states and 120 transitions. [2024-06-28 03:17:14,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 138 transitions, 1326 flow [2024-06-28 03:17:14,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 138 transitions, 1169 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-28 03:17:14,590 INFO L231 Difference]: Finished difference. Result has 113 places, 129 transitions, 945 flow [2024-06-28 03:17:14,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=945, PETRI_PLACES=113, PETRI_TRANSITIONS=129} [2024-06-28 03:17:14,590 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-28 03:17:14,591 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 129 transitions, 945 flow [2024-06-28 03:17:14,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-28 03:17:14,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:14,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:14,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:17:14,591 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:14,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:14,591 INFO L85 PathProgramCache]: Analyzing trace with hash -944970864, now seen corresponding path program 1 times [2024-06-28 03:17:14,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:14,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566681565] [2024-06-28 03:17:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:14,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:15,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566681565] [2024-06-28 03:17:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566681565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:15,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:15,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:17:15,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328821125] [2024-06-28 03:17:15,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:15,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:17:15,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:15,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:17:15,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:17:15,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-28 03:17:15,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 129 transitions, 945 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) [2024-06-28 03:17:15,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:15,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-28 03:17:15,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:15,737 INFO L124 PetriNetUnfolderBase]: 1821/3018 cut-off events. [2024-06-28 03:17:15,737 INFO L125 PetriNetUnfolderBase]: For 120404/120404 co-relation queries the response was YES. [2024-06-28 03:17:15,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18636 conditions, 3018 events. 1821/3018 cut-off events. For 120404/120404 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16799 event pairs, 560 based on Foata normal form. 1/3019 useless extension candidates. Maximal degree in co-relation 18585. Up to 2618 conditions per place. [2024-06-28 03:17:15,756 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 117 selfloop transitions, 11 changer transitions 0/144 dead transitions. [2024-06-28 03:17:15,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 144 transitions, 1261 flow [2024-06-28 03:17:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:17:15,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:17:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-28 03:17:15,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-28 03:17:15,757 INFO L175 Difference]: Start difference. First operand has 113 places, 129 transitions, 945 flow. Second operand 6 states and 126 transitions. [2024-06-28 03:17:15,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 144 transitions, 1261 flow [2024-06-28 03:17:15,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 144 transitions, 1205 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 03:17:15,802 INFO L231 Difference]: Finished difference. Result has 115 places, 132 transitions, 953 flow [2024-06-28 03:17:15,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=953, PETRI_PLACES=115, PETRI_TRANSITIONS=132} [2024-06-28 03:17:15,803 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-28 03:17:15,803 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 132 transitions, 953 flow [2024-06-28 03:17:15,803 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) [2024-06-28 03:17:15,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:15,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:15,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:17:15,804 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:15,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1404631743, now seen corresponding path program 1 times [2024-06-28 03:17:15,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:15,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196784171] [2024-06-28 03:17:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:15,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:16,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:16,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196784171] [2024-06-28 03:17:16,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196784171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:16,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:16,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:17:16,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116005475] [2024-06-28 03:17:16,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:16,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:17:16,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:16,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:17:16,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:17:16,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:16,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 132 transitions, 953 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:16,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:16,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:16,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:17,644 INFO L124 PetriNetUnfolderBase]: 1913/3104 cut-off events. [2024-06-28 03:17:17,644 INFO L125 PetriNetUnfolderBase]: For 126859/126859 co-relation queries the response was YES. [2024-06-28 03:17:17,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19362 conditions, 3104 events. 1913/3104 cut-off events. For 126859/126859 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16839 event pairs, 549 based on Foata normal form. 4/3108 useless extension candidates. Maximal degree in co-relation 19310. Up to 2742 conditions per place. [2024-06-28 03:17:17,663 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 138 selfloop transitions, 19 changer transitions 0/165 dead transitions. [2024-06-28 03:17:17,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 165 transitions, 1387 flow [2024-06-28 03:17:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:17:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:17:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-28 03:17:17,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-28 03:17:17,665 INFO L175 Difference]: Start difference. First operand has 115 places, 132 transitions, 953 flow. Second operand 9 states and 182 transitions. [2024-06-28 03:17:17,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 165 transitions, 1387 flow [2024-06-28 03:17:17,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 165 transitions, 1345 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-28 03:17:17,718 INFO L231 Difference]: Finished difference. Result has 121 places, 137 transitions, 1016 flow [2024-06-28 03:17:17,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1016, PETRI_PLACES=121, PETRI_TRANSITIONS=137} [2024-06-28 03:17:17,719 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-28 03:17:17,719 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 137 transitions, 1016 flow [2024-06-28 03:17:17,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:17,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:17,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:17,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:17:17,719 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:17,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash -355534074, now seen corresponding path program 2 times [2024-06-28 03:17:17,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:17,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206087431] [2024-06-28 03:17:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:17,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:18,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:18,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206087431] [2024-06-28 03:17:18,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206087431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:18,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:18,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:17:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572989018] [2024-06-28 03:17:18,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:18,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:17:18,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:17:18,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:17:18,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-28 03:17:18,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 137 transitions, 1016 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) [2024-06-28 03:17:18,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:18,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-28 03:17:18,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:18,972 INFO L124 PetriNetUnfolderBase]: 1811/3002 cut-off events. [2024-06-28 03:17:18,973 INFO L125 PetriNetUnfolderBase]: For 133283/133285 co-relation queries the response was YES. [2024-06-28 03:17:18,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19496 conditions, 3002 events. 1811/3002 cut-off events. For 133283/133285 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16671 event pairs, 540 based on Foata normal form. 3/3005 useless extension candidates. Maximal degree in co-relation 19442. Up to 2597 conditions per place. [2024-06-28 03:17:18,990 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 117 selfloop transitions, 16 changer transitions 0/149 dead transitions. [2024-06-28 03:17:18,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 149 transitions, 1342 flow [2024-06-28 03:17:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:17:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:17:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-28 03:17:18,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-28 03:17:18,991 INFO L175 Difference]: Start difference. First operand has 121 places, 137 transitions, 1016 flow. Second operand 6 states and 125 transitions. [2024-06-28 03:17:18,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 149 transitions, 1342 flow [2024-06-28 03:17:19,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 149 transitions, 1277 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:19,043 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1033 flow [2024-06-28 03:17:19,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1033, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2024-06-28 03:17:19,044 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-28 03:17:19,044 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1033 flow [2024-06-28 03:17:19,044 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) [2024-06-28 03:17:19,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:19,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:19,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:17:19,044 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:19,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:19,044 INFO L85 PathProgramCache]: Analyzing trace with hash -355524154, now seen corresponding path program 1 times [2024-06-28 03:17:19,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:19,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247091113] [2024-06-28 03:17:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:19,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:19,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:19,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247091113] [2024-06-28 03:17:19,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247091113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:19,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:19,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:19,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414789729] [2024-06-28 03:17:19,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:19,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:19,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:19,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:19,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:19,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:19,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1033 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:19,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:19,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:19,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:20,359 INFO L124 PetriNetUnfolderBase]: 1942/3131 cut-off events. [2024-06-28 03:17:20,359 INFO L125 PetriNetUnfolderBase]: For 139394/139394 co-relation queries the response was YES. [2024-06-28 03:17:20,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20422 conditions, 3131 events. 1942/3131 cut-off events. For 139394/139394 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16850 event pairs, 584 based on Foata normal form. 1/3132 useless extension candidates. Maximal degree in co-relation 20367. Up to 2840 conditions per place. [2024-06-28 03:17:20,380 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 125 selfloop transitions, 14 changer transitions 0/153 dead transitions. [2024-06-28 03:17:20,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 153 transitions, 1375 flow [2024-06-28 03:17:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:20,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-28 03:17:20,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-28 03:17:20,381 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1033 flow. Second operand 7 states and 134 transitions. [2024-06-28 03:17:20,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 153 transitions, 1375 flow [2024-06-28 03:17:20,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 153 transitions, 1315 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 03:17:20,433 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1053 flow [2024-06-28 03:17:20,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-06-28 03:17:20,434 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-28 03:17:20,434 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1053 flow [2024-06-28 03:17:20,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:20,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:20,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:20,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:17:20,435 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:20,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash -536784117, now seen corresponding path program 1 times [2024-06-28 03:17:20,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:20,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861378899] [2024-06-28 03:17:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:20,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:21,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:21,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861378899] [2024-06-28 03:17:21,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861378899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:21,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:21,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:21,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65842907] [2024-06-28 03:17:21,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:21,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:21,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:21,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:21,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:21,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:21,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1053 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:21,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:21,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:21,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:21,947 INFO L124 PetriNetUnfolderBase]: 2168/3389 cut-off events. [2024-06-28 03:17:21,947 INFO L125 PetriNetUnfolderBase]: For 172869/172871 co-relation queries the response was YES. [2024-06-28 03:17:21,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23302 conditions, 3389 events. 2168/3389 cut-off events. For 172869/172871 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17638 event pairs, 458 based on Foata normal form. 6/3395 useless extension candidates. Maximal degree in co-relation 23246. Up to 2835 conditions per place. [2024-06-28 03:17:21,968 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 131 selfloop transitions, 40 changer transitions 0/178 dead transitions. [2024-06-28 03:17:21,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 178 transitions, 1653 flow [2024-06-28 03:17:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:21,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 03:17:21,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-28 03:17:21,969 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1053 flow. Second operand 8 states and 168 transitions. [2024-06-28 03:17:21,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 178 transitions, 1653 flow [2024-06-28 03:17:22,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 178 transitions, 1595 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:22,034 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1142 flow [2024-06-28 03:17:22,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1142, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-28 03:17:22,034 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-28 03:17:22,035 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1142 flow [2024-06-28 03:17:22,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:22,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:22,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:22,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:17:22,035 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:22,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash -534906447, now seen corresponding path program 2 times [2024-06-28 03:17:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:22,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003609190] [2024-06-28 03:17:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:22,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:22,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:22,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003609190] [2024-06-28 03:17:22,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003609190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:22,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:22,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:22,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671638133] [2024-06-28 03:17:22,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:22,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:22,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:22,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:22,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:22,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:22,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1142 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:22,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:22,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:22,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:23,669 INFO L124 PetriNetUnfolderBase]: 2185/3416 cut-off events. [2024-06-28 03:17:23,669 INFO L125 PetriNetUnfolderBase]: For 182665/182667 co-relation queries the response was YES. [2024-06-28 03:17:23,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23942 conditions, 3416 events. 2185/3416 cut-off events. For 182665/182667 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17839 event pairs, 630 based on Foata normal form. 6/3422 useless extension candidates. Maximal degree in co-relation 23885. Up to 3015 conditions per place. [2024-06-28 03:17:23,693 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 131 selfloop transitions, 38 changer transitions 0/176 dead transitions. [2024-06-28 03:17:23,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 176 transitions, 1580 flow [2024-06-28 03:17:23,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:23,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 03:17:23,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-28 03:17:23,695 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1142 flow. Second operand 8 states and 166 transitions. [2024-06-28 03:17:23,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 176 transitions, 1580 flow [2024-06-28 03:17:23,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 176 transitions, 1502 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 03:17:23,767 INFO L231 Difference]: Finished difference. Result has 131 places, 149 transitions, 1183 flow [2024-06-28 03:17:23,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1183, PETRI_PLACES=131, PETRI_TRANSITIONS=149} [2024-06-28 03:17:23,767 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-28 03:17:23,767 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 149 transitions, 1183 flow [2024-06-28 03:17:23,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:23,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:23,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:23,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:17:23,768 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:23,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:23,768 INFO L85 PathProgramCache]: Analyzing trace with hash -137181591, now seen corresponding path program 3 times [2024-06-28 03:17:23,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:23,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275411573] [2024-06-28 03:17:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:23,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:24,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:24,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275411573] [2024-06-28 03:17:24,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275411573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:24,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:24,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:24,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202227308] [2024-06-28 03:17:24,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:24,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:24,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:24,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:24,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:24,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:24,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 149 transitions, 1183 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:24,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:24,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:24,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:25,403 INFO L124 PetriNetUnfolderBase]: 2202/3443 cut-off events. [2024-06-28 03:17:25,403 INFO L125 PetriNetUnfolderBase]: For 192564/192566 co-relation queries the response was YES. [2024-06-28 03:17:25,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24399 conditions, 3443 events. 2202/3443 cut-off events. For 192564/192566 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17967 event pairs, 630 based on Foata normal form. 6/3449 useless extension candidates. Maximal degree in co-relation 24340. Up to 3001 conditions per place. [2024-06-28 03:17:25,426 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 131 selfloop transitions, 41 changer transitions 0/179 dead transitions. [2024-06-28 03:17:25,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 179 transitions, 1625 flow [2024-06-28 03:17:25,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:25,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 03:17:25,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-28 03:17:25,428 INFO L175 Difference]: Start difference. First operand has 131 places, 149 transitions, 1183 flow. Second operand 8 states and 167 transitions. [2024-06-28 03:17:25,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 179 transitions, 1625 flow [2024-06-28 03:17:25,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 179 transitions, 1536 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:25,495 INFO L231 Difference]: Finished difference. Result has 133 places, 151 transitions, 1215 flow [2024-06-28 03:17:25,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1215, PETRI_PLACES=133, PETRI_TRANSITIONS=151} [2024-06-28 03:17:25,496 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 88 predicate places. [2024-06-28 03:17:25,496 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 151 transitions, 1215 flow [2024-06-28 03:17:25,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:25,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:25,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:25,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:17:25,496 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:25,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash 593000960, now seen corresponding path program 1 times [2024-06-28 03:17:25,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:25,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297739224] [2024-06-28 03:17:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:25,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:26,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:26,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297739224] [2024-06-28 03:17:26,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297739224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:26,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:26,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:26,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305235086] [2024-06-28 03:17:26,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:26,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:26,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:26,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:26,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:26,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:26,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 151 transitions, 1215 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:26,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:26,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:26,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:26,791 INFO L124 PetriNetUnfolderBase]: 2097/3343 cut-off events. [2024-06-28 03:17:26,791 INFO L125 PetriNetUnfolderBase]: For 201500/201502 co-relation queries the response was YES. [2024-06-28 03:17:26,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24206 conditions, 3343 events. 2097/3343 cut-off events. For 201500/201502 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17996 event pairs, 625 based on Foata normal form. 4/3347 useless extension candidates. Maximal degree in co-relation 24146. Up to 2921 conditions per place. [2024-06-28 03:17:26,818 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 134 selfloop transitions, 24 changer transitions 0/177 dead transitions. [2024-06-28 03:17:26,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 177 transitions, 1639 flow [2024-06-28 03:17:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-28 03:17:26,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4902597402597403 [2024-06-28 03:17:26,820 INFO L175 Difference]: Start difference. First operand has 133 places, 151 transitions, 1215 flow. Second operand 7 states and 151 transitions. [2024-06-28 03:17:26,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 177 transitions, 1639 flow [2024-06-28 03:17:26,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 177 transitions, 1540 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:26,919 INFO L231 Difference]: Finished difference. Result has 134 places, 155 transitions, 1231 flow [2024-06-28 03:17:26,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1231, PETRI_PLACES=134, PETRI_TRANSITIONS=155} [2024-06-28 03:17:26,921 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-28 03:17:26,921 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 155 transitions, 1231 flow [2024-06-28 03:17:26,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:26,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:26,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:26,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:17:26,921 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:26,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:26,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1169159383, now seen corresponding path program 4 times [2024-06-28 03:17:26,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:26,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473143760] [2024-06-28 03:17:26,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:26,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:27,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:27,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473143760] [2024-06-28 03:17:27,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473143760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:27,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:27,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:27,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36866423] [2024-06-28 03:17:27,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:27,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:27,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:27,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:27,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:27,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:27,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 155 transitions, 1231 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:27,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:27,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:27,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:28,503 INFO L124 PetriNetUnfolderBase]: 2229/3486 cut-off events. [2024-06-28 03:17:28,503 INFO L125 PetriNetUnfolderBase]: For 212978/212980 co-relation queries the response was YES. [2024-06-28 03:17:28,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25478 conditions, 3486 events. 2229/3486 cut-off events. For 212978/212980 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18270 event pairs, 462 based on Foata normal form. 6/3492 useless extension candidates. Maximal degree in co-relation 25417. Up to 2996 conditions per place. [2024-06-28 03:17:28,532 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 138 selfloop transitions, 45 changer transitions 0/190 dead transitions. [2024-06-28 03:17:28,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 190 transitions, 1851 flow [2024-06-28 03:17:28,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-28 03:17:28,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4914772727272727 [2024-06-28 03:17:28,534 INFO L175 Difference]: Start difference. First operand has 134 places, 155 transitions, 1231 flow. Second operand 8 states and 173 transitions. [2024-06-28 03:17:28,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 190 transitions, 1851 flow [2024-06-28 03:17:28,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 190 transitions, 1764 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:28,652 INFO L231 Difference]: Finished difference. Result has 137 places, 157 transitions, 1273 flow [2024-06-28 03:17:28,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1273, PETRI_PLACES=137, PETRI_TRANSITIONS=157} [2024-06-28 03:17:28,653 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-28 03:17:28,653 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 157 transitions, 1273 flow [2024-06-28 03:17:28,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:28,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:28,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:28,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:17:28,653 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:28,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:28,654 INFO L85 PathProgramCache]: Analyzing trace with hash -858118897, now seen corresponding path program 5 times [2024-06-28 03:17:28,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:28,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777438237] [2024-06-28 03:17:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:28,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:29,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:29,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777438237] [2024-06-28 03:17:29,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777438237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:29,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:29,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:29,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324025460] [2024-06-28 03:17:29,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:29,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:29,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:29,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:29,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:29,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:29,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 157 transitions, 1273 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:29,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:29,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:29,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:30,357 INFO L124 PetriNetUnfolderBase]: 2246/3513 cut-off events. [2024-06-28 03:17:30,358 INFO L125 PetriNetUnfolderBase]: For 224077/224079 co-relation queries the response was YES. [2024-06-28 03:17:30,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25977 conditions, 3513 events. 2246/3513 cut-off events. For 224077/224079 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18457 event pairs, 634 based on Foata normal form. 6/3519 useless extension candidates. Maximal degree in co-relation 25915. Up to 3110 conditions per place. [2024-06-28 03:17:30,382 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 141 selfloop transitions, 41 changer transitions 0/189 dead transitions. [2024-06-28 03:17:30,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 189 transitions, 1749 flow [2024-06-28 03:17:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-28 03:17:30,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-28 03:17:30,384 INFO L175 Difference]: Start difference. First operand has 137 places, 157 transitions, 1273 flow. Second operand 8 states and 169 transitions. [2024-06-28 03:17:30,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 189 transitions, 1749 flow [2024-06-28 03:17:30,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 189 transitions, 1626 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:30,502 INFO L231 Difference]: Finished difference. Result has 139 places, 159 transitions, 1279 flow [2024-06-28 03:17:30,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1279, PETRI_PLACES=139, PETRI_TRANSITIONS=159} [2024-06-28 03:17:30,503 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-28 03:17:30,503 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 159 transitions, 1279 flow [2024-06-28 03:17:30,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:30,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:30,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:30,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:17:30,503 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:30,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash -852612367, now seen corresponding path program 6 times [2024-06-28 03:17:30,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:30,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411462565] [2024-06-28 03:17:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:31,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:31,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411462565] [2024-06-28 03:17:31,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411462565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:31,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:31,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:31,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018549698] [2024-06-28 03:17:31,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:31,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:31,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:31,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:31,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 159 transitions, 1279 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:31,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:31,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:31,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:32,119 INFO L124 PetriNetUnfolderBase]: 2263/3540 cut-off events. [2024-06-28 03:17:32,119 INFO L125 PetriNetUnfolderBase]: For 234856/234858 co-relation queries the response was YES. [2024-06-28 03:17:32,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26308 conditions, 3540 events. 2263/3540 cut-off events. For 234856/234858 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18580 event pairs, 634 based on Foata normal form. 6/3546 useless extension candidates. Maximal degree in co-relation 26245. Up to 3137 conditions per place. [2024-06-28 03:17:32,144 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 143 selfloop transitions, 38 changer transitions 0/188 dead transitions. [2024-06-28 03:17:32,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 188 transitions, 1745 flow [2024-06-28 03:17:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:32,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-28 03:17:32,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-28 03:17:32,145 INFO L175 Difference]: Start difference. First operand has 139 places, 159 transitions, 1279 flow. Second operand 8 states and 165 transitions. [2024-06-28 03:17:32,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 188 transitions, 1745 flow [2024-06-28 03:17:32,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 188 transitions, 1642 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:32,305 INFO L231 Difference]: Finished difference. Result has 141 places, 161 transitions, 1299 flow [2024-06-28 03:17:32,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1299, PETRI_PLACES=141, PETRI_TRANSITIONS=161} [2024-06-28 03:17:32,306 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-28 03:17:32,306 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 161 transitions, 1299 flow [2024-06-28 03:17:32,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:32,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:32,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:32,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:17:32,309 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:32,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:32,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1849352266, now seen corresponding path program 2 times [2024-06-28 03:17:32,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:32,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869590104] [2024-06-28 03:17:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:32,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:33,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:33,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869590104] [2024-06-28 03:17:33,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869590104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:33,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:33,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:33,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490302347] [2024-06-28 03:17:33,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:33,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:33,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:33,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:33,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:33,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:33,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 161 transitions, 1299 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:33,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:33,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:33,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:33,642 INFO L124 PetriNetUnfolderBase]: 2161/3455 cut-off events. [2024-06-28 03:17:33,642 INFO L125 PetriNetUnfolderBase]: For 245963/245965 co-relation queries the response was YES. [2024-06-28 03:17:33,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26210 conditions, 3455 events. 2161/3455 cut-off events. For 245963/245965 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18774 event pairs, 624 based on Foata normal form. 4/3459 useless extension candidates. Maximal degree in co-relation 26146. Up to 2985 conditions per place. [2024-06-28 03:17:33,715 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 135 selfloop transitions, 29 changer transitions 0/186 dead transitions. [2024-06-28 03:17:33,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 186 transitions, 1865 flow [2024-06-28 03:17:33,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:33,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-28 03:17:33,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-28 03:17:33,716 INFO L175 Difference]: Start difference. First operand has 141 places, 161 transitions, 1299 flow. Second operand 7 states and 147 transitions. [2024-06-28 03:17:33,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 186 transitions, 1865 flow [2024-06-28 03:17:33,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 186 transitions, 1764 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:33,840 INFO L231 Difference]: Finished difference. Result has 143 places, 169 transitions, 1400 flow [2024-06-28 03:17:33,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1400, PETRI_PLACES=143, PETRI_TRANSITIONS=169} [2024-06-28 03:17:33,841 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-28 03:17:33,841 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 169 transitions, 1400 flow [2024-06-28 03:17:33,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:33,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:33,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:33,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:17:33,841 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:33,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:33,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1818727180, now seen corresponding path program 1 times [2024-06-28 03:17:33,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:33,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025581598] [2024-06-28 03:17:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:33,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:34,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:34,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025581598] [2024-06-28 03:17:34,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025581598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:34,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:34,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:34,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126128231] [2024-06-28 03:17:34,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:34,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:34,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:34,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:34,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:34,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:34,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 169 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:34,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:34,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:34,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:35,189 INFO L124 PetriNetUnfolderBase]: 2299/3594 cut-off events. [2024-06-28 03:17:35,189 INFO L125 PetriNetUnfolderBase]: For 258262/258262 co-relation queries the response was YES. [2024-06-28 03:17:35,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27695 conditions, 3594 events. 2299/3594 cut-off events. For 258262/258262 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 18992 event pairs, 669 based on Foata normal form. 1/3595 useless extension candidates. Maximal degree in co-relation 27629. Up to 3320 conditions per place. [2024-06-28 03:17:35,216 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 154 selfloop transitions, 14 changer transitions 0/188 dead transitions. [2024-06-28 03:17:35,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 188 transitions, 1820 flow [2024-06-28 03:17:35,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-28 03:17:35,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-28 03:17:35,217 INFO L175 Difference]: Start difference. First operand has 143 places, 169 transitions, 1400 flow. Second operand 7 states and 134 transitions. [2024-06-28 03:17:35,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 188 transitions, 1820 flow [2024-06-28 03:17:35,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 188 transitions, 1737 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 03:17:35,347 INFO L231 Difference]: Finished difference. Result has 147 places, 172 transitions, 1401 flow [2024-06-28 03:17:35,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1401, PETRI_PLACES=147, PETRI_TRANSITIONS=172} [2024-06-28 03:17:35,347 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 102 predicate places. [2024-06-28 03:17:35,348 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 172 transitions, 1401 flow [2024-06-28 03:17:35,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:35,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:35,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:35,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:17:35,348 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:35,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:35,349 INFO L85 PathProgramCache]: Analyzing trace with hash -626923359, now seen corresponding path program 7 times [2024-06-28 03:17:35,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:35,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916146627] [2024-06-28 03:17:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:35,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:36,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:36,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916146627] [2024-06-28 03:17:36,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916146627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:36,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:36,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:17:36,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763149455] [2024-06-28 03:17:36,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:36,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:17:36,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:36,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:17:36,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:17:36,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:36,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 172 transitions, 1401 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:36,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:36,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:36,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:37,021 INFO L124 PetriNetUnfolderBase]: 2304/3598 cut-off events. [2024-06-28 03:17:37,021 INFO L125 PetriNetUnfolderBase]: For 269669/269671 co-relation queries the response was YES. [2024-06-28 03:17:37,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28133 conditions, 3598 events. 2304/3598 cut-off events. For 269669/269671 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18932 event pairs, 658 based on Foata normal form. 6/3603 useless extension candidates. Maximal degree in co-relation 28065. Up to 3185 conditions per place. [2024-06-28 03:17:37,052 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 152 selfloop transitions, 36 changer transitions 0/196 dead transitions. [2024-06-28 03:17:37,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 196 transitions, 1837 flow [2024-06-28 03:17:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:17:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:17:37,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 03:17:37,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-28 03:17:37,054 INFO L175 Difference]: Start difference. First operand has 147 places, 172 transitions, 1401 flow. Second operand 8 states and 161 transitions. [2024-06-28 03:17:37,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 196 transitions, 1837 flow [2024-06-28 03:17:37,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 196 transitions, 1755 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:37,202 INFO L231 Difference]: Finished difference. Result has 150 places, 172 transitions, 1398 flow [2024-06-28 03:17:37,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1398, PETRI_PLACES=150, PETRI_TRANSITIONS=172} [2024-06-28 03:17:37,203 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 105 predicate places. [2024-06-28 03:17:37,203 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 172 transitions, 1398 flow [2024-06-28 03:17:37,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:37,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:37,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:37,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:17:37,203 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:37,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1863161836, now seen corresponding path program 3 times [2024-06-28 03:17:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:37,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343760309] [2024-06-28 03:17:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:37,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:37,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:37,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343760309] [2024-06-28 03:17:37,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343760309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:37,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:37,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:37,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573010638] [2024-06-28 03:17:37,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:37,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:37,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:37,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:37,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:38,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:38,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 172 transitions, 1398 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:38,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:38,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:38,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:38,571 INFO L124 PetriNetUnfolderBase]: 2178/3475 cut-off events. [2024-06-28 03:17:38,571 INFO L125 PetriNetUnfolderBase]: For 278242/278244 co-relation queries the response was YES. [2024-06-28 03:17:38,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27787 conditions, 3475 events. 2178/3475 cut-off events. For 278242/278244 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18804 event pairs, 650 based on Foata normal form. 4/3478 useless extension candidates. Maximal degree in co-relation 27718. Up to 2973 conditions per place. [2024-06-28 03:17:38,598 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 127 selfloop transitions, 42 changer transitions 0/192 dead transitions. [2024-06-28 03:17:38,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 192 transitions, 2076 flow [2024-06-28 03:17:38,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-28 03:17:38,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-28 03:17:38,599 INFO L175 Difference]: Start difference. First operand has 150 places, 172 transitions, 1398 flow. Second operand 7 states and 145 transitions. [2024-06-28 03:17:38,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 192 transitions, 2076 flow [2024-06-28 03:17:38,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 192 transitions, 1982 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 03:17:38,733 INFO L231 Difference]: Finished difference. Result has 151 places, 180 transitions, 1548 flow [2024-06-28 03:17:38,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1548, PETRI_PLACES=151, PETRI_TRANSITIONS=180} [2024-06-28 03:17:38,733 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-28 03:17:38,733 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 180 transitions, 1548 flow [2024-06-28 03:17:38,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:38,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:38,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:38,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:17:38,734 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:38,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:38,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1006666324, now seen corresponding path program 2 times [2024-06-28 03:17:38,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:38,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962664077] [2024-06-28 03:17:38,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:38,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:39,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:39,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962664077] [2024-06-28 03:17:39,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962664077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:39,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:39,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:39,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140151453] [2024-06-28 03:17:39,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:39,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:39,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:39,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:39,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:39,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:39,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 180 transitions, 1548 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:39,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:39,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:39,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:40,081 INFO L124 PetriNetUnfolderBase]: 2300/3598 cut-off events. [2024-06-28 03:17:40,081 INFO L125 PetriNetUnfolderBase]: For 291509/291515 co-relation queries the response was YES. [2024-06-28 03:17:40,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29194 conditions, 3598 events. 2300/3598 cut-off events. For 291509/291515 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18998 event pairs, 673 based on Foata normal form. 7/3605 useless extension candidates. Maximal degree in co-relation 29123. Up to 3309 conditions per place. [2024-06-28 03:17:40,112 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 151 selfloop transitions, 26 changer transitions 0/197 dead transitions. [2024-06-28 03:17:40,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 197 transitions, 2128 flow [2024-06-28 03:17:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:40,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-28 03:17:40,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-28 03:17:40,113 INFO L175 Difference]: Start difference. First operand has 151 places, 180 transitions, 1548 flow. Second operand 7 states and 133 transitions. [2024-06-28 03:17:40,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 197 transitions, 2128 flow [2024-06-28 03:17:40,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 197 transitions, 1982 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-28 03:17:40,276 INFO L231 Difference]: Finished difference. Result has 154 places, 186 transitions, 1574 flow [2024-06-28 03:17:40,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1574, PETRI_PLACES=154, PETRI_TRANSITIONS=186} [2024-06-28 03:17:40,277 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-28 03:17:40,277 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 186 transitions, 1574 flow [2024-06-28 03:17:40,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:40,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:40,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:40,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:17:40,277 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:40,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:40,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1007141554, now seen corresponding path program 3 times [2024-06-28 03:17:40,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:40,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582415660] [2024-06-28 03:17:40,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:40,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:41,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:41,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582415660] [2024-06-28 03:17:41,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582415660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:41,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:41,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:41,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580317742] [2024-06-28 03:17:41,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:41,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:41,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:41,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:41,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:41,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:41,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 186 transitions, 1574 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:41,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:41,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:41,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:41,680 INFO L124 PetriNetUnfolderBase]: 2297/3594 cut-off events. [2024-06-28 03:17:41,680 INFO L125 PetriNetUnfolderBase]: For 302071/302077 co-relation queries the response was YES. [2024-06-28 03:17:41,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29181 conditions, 3594 events. 2297/3594 cut-off events. For 302071/302077 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 19001 event pairs, 673 based on Foata normal form. 7/3601 useless extension candidates. Maximal degree in co-relation 29109. Up to 3306 conditions per place. [2024-06-28 03:17:41,706 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 149 selfloop transitions, 27 changer transitions 0/196 dead transitions. [2024-06-28 03:17:41,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 196 transitions, 1950 flow [2024-06-28 03:17:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 03:17:41,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-28 03:17:41,707 INFO L175 Difference]: Start difference. First operand has 154 places, 186 transitions, 1574 flow. Second operand 7 states and 131 transitions. [2024-06-28 03:17:41,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 196 transitions, 1950 flow [2024-06-28 03:17:41,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 196 transitions, 1840 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-28 03:17:41,852 INFO L231 Difference]: Finished difference. Result has 158 places, 186 transitions, 1524 flow [2024-06-28 03:17:41,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1524, PETRI_PLACES=158, PETRI_TRANSITIONS=186} [2024-06-28 03:17:41,852 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-28 03:17:41,852 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 186 transitions, 1524 flow [2024-06-28 03:17:41,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:41,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:41,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:41,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:17:41,853 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:41,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1501777210, now seen corresponding path program 1 times [2024-06-28 03:17:41,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:41,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839477383] [2024-06-28 03:17:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:41,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:42,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:42,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839477383] [2024-06-28 03:17:42,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839477383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:42,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:42,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:42,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687248278] [2024-06-28 03:17:42,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:42,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:42,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:42,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:42,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 186 transitions, 1524 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:42,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:42,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:42,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:43,179 INFO L124 PetriNetUnfolderBase]: 2074/3349 cut-off events. [2024-06-28 03:17:43,179 INFO L125 PetriNetUnfolderBase]: For 270706/270706 co-relation queries the response was YES. [2024-06-28 03:17:43,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26466 conditions, 3349 events. 2074/3349 cut-off events. For 270706/270706 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18149 event pairs, 534 based on Foata normal form. 1/3350 useless extension candidates. Maximal degree in co-relation 26392. Up to 3009 conditions per place. [2024-06-28 03:17:43,206 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 180 selfloop transitions, 14 changer transitions 0/205 dead transitions. [2024-06-28 03:17:43,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 205 transitions, 1998 flow [2024-06-28 03:17:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:43,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-28 03:17:43,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-28 03:17:43,207 INFO L175 Difference]: Start difference. First operand has 158 places, 186 transitions, 1524 flow. Second operand 7 states and 140 transitions. [2024-06-28 03:17:43,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 205 transitions, 1998 flow [2024-06-28 03:17:43,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 205 transitions, 1934 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:43,392 INFO L231 Difference]: Finished difference. Result has 159 places, 189 transitions, 1546 flow [2024-06-28 03:17:43,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1546, PETRI_PLACES=159, PETRI_TRANSITIONS=189} [2024-06-28 03:17:43,393 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-28 03:17:43,393 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 189 transitions, 1546 flow [2024-06-28 03:17:43,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:43,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:43,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:43,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:17:43,394 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:43,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:43,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1855072572, now seen corresponding path program 1 times [2024-06-28 03:17:43,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:43,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786047267] [2024-06-28 03:17:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:43,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:44,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:44,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786047267] [2024-06-28 03:17:44,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786047267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:44,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:44,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:44,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300407068] [2024-06-28 03:17:44,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:44,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:44,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:44,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:44,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:44,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:44,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 189 transitions, 1546 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:44,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:44,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:44,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:44,728 INFO L124 PetriNetUnfolderBase]: 2091/3368 cut-off events. [2024-06-28 03:17:44,729 INFO L125 PetriNetUnfolderBase]: For 279927/279927 co-relation queries the response was YES. [2024-06-28 03:17:44,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26967 conditions, 3368 events. 2091/3368 cut-off events. For 279927/279927 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18279 event pairs, 576 based on Foata normal form. 1/3369 useless extension candidates. Maximal degree in co-relation 26892. Up to 3009 conditions per place. [2024-06-28 03:17:44,758 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 169 selfloop transitions, 14 changer transitions 0/205 dead transitions. [2024-06-28 03:17:44,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 205 transitions, 1992 flow [2024-06-28 03:17:44,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:44,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 03:17:44,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-28 03:17:44,759 INFO L175 Difference]: Start difference. First operand has 159 places, 189 transitions, 1546 flow. Second operand 7 states and 137 transitions. [2024-06-28 03:17:44,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 205 transitions, 1992 flow [2024-06-28 03:17:44,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 205 transitions, 1928 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:44,984 INFO L231 Difference]: Finished difference. Result has 161 places, 192 transitions, 1570 flow [2024-06-28 03:17:44,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1570, PETRI_PLACES=161, PETRI_TRANSITIONS=192} [2024-06-28 03:17:44,984 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 116 predicate places. [2024-06-28 03:17:44,984 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 192 transitions, 1570 flow [2024-06-28 03:17:44,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:44,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:44,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:44,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:17:44,985 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:44,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:44,985 INFO L85 PathProgramCache]: Analyzing trace with hash 770675228, now seen corresponding path program 2 times [2024-06-28 03:17:44,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:44,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802922355] [2024-06-28 03:17:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:44,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:45,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:45,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802922355] [2024-06-28 03:17:45,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802922355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:45,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:45,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:45,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299816341] [2024-06-28 03:17:45,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:45,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:45,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:45,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:45,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:45,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:45,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 192 transitions, 1570 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:45,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:45,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:45,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:46,309 INFO L124 PetriNetUnfolderBase]: 2094/3373 cut-off events. [2024-06-28 03:17:46,309 INFO L125 PetriNetUnfolderBase]: For 292604/292604 co-relation queries the response was YES. [2024-06-28 03:17:46,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27626 conditions, 3373 events. 2094/3373 cut-off events. For 292604/292604 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18207 event pairs, 533 based on Foata normal form. 1/3374 useless extension candidates. Maximal degree in co-relation 27550. Up to 3025 conditions per place. [2024-06-28 03:17:46,338 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 177 selfloop transitions, 19 changer transitions 0/208 dead transitions. [2024-06-28 03:17:46,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 208 transitions, 2048 flow [2024-06-28 03:17:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:46,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-28 03:17:46,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-28 03:17:46,339 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 1570 flow. Second operand 7 states and 139 transitions. [2024-06-28 03:17:46,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 208 transitions, 2048 flow [2024-06-28 03:17:46,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 208 transitions, 1982 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:46,559 INFO L231 Difference]: Finished difference. Result has 163 places, 195 transitions, 1608 flow [2024-06-28 03:17:46,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1608, PETRI_PLACES=163, PETRI_TRANSITIONS=195} [2024-06-28 03:17:46,559 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-28 03:17:46,560 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 195 transitions, 1608 flow [2024-06-28 03:17:46,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:46,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:46,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:46,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:17:46,560 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:46,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1007147506, now seen corresponding path program 2 times [2024-06-28 03:17:46,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:46,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314127617] [2024-06-28 03:17:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:46,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:46,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:47,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:47,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314127617] [2024-06-28 03:17:47,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314127617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:47,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:47,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:47,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216868658] [2024-06-28 03:17:47,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:47,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:47,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:47,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:47,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:47,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:47,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 195 transitions, 1608 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:47,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:47,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:47,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:47,917 INFO L124 PetriNetUnfolderBase]: 2101/3383 cut-off events. [2024-06-28 03:17:47,918 INFO L125 PetriNetUnfolderBase]: For 302031/302033 co-relation queries the response was YES. [2024-06-28 03:17:47,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28004 conditions, 3383 events. 2101/3383 cut-off events. For 302031/302033 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18390 event pairs, 580 based on Foata normal form. 3/3386 useless extension candidates. Maximal degree in co-relation 27927. Up to 3005 conditions per place. [2024-06-28 03:17:47,948 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 162 selfloop transitions, 27 changer transitions 0/212 dead transitions. [2024-06-28 03:17:47,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 212 transitions, 2226 flow [2024-06-28 03:17:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 03:17:47,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-28 03:17:47,949 INFO L175 Difference]: Start difference. First operand has 163 places, 195 transitions, 1608 flow. Second operand 7 states and 138 transitions. [2024-06-28 03:17:47,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 212 transitions, 2226 flow [2024-06-28 03:17:48,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 212 transitions, 2144 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:48,222 INFO L231 Difference]: Finished difference. Result has 165 places, 201 transitions, 1704 flow [2024-06-28 03:17:48,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1704, PETRI_PLACES=165, PETRI_TRANSITIONS=201} [2024-06-28 03:17:48,222 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 120 predicate places. [2024-06-28 03:17:48,222 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 201 transitions, 1704 flow [2024-06-28 03:17:48,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:48,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:48,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:48,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:17:48,223 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:48,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:48,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1006850836, now seen corresponding path program 3 times [2024-06-28 03:17:48,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:48,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117274027] [2024-06-28 03:17:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:48,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:49,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:49,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117274027] [2024-06-28 03:17:49,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117274027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:49,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:49,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:49,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712016365] [2024-06-28 03:17:49,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:49,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:49,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:49,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:49,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:49,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:49,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 201 transitions, 1704 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:49,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:49,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:49,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:49,619 INFO L124 PetriNetUnfolderBase]: 2098/3379 cut-off events. [2024-06-28 03:17:49,619 INFO L125 PetriNetUnfolderBase]: For 313218/313220 co-relation queries the response was YES. [2024-06-28 03:17:49,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28392 conditions, 3379 events. 2098/3379 cut-off events. For 313218/313220 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18332 event pairs, 580 based on Foata normal form. 3/3382 useless extension candidates. Maximal degree in co-relation 28314. Up to 3002 conditions per place. [2024-06-28 03:17:49,648 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 162 selfloop transitions, 26 changer transitions 0/211 dead transitions. [2024-06-28 03:17:49,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 2104 flow [2024-06-28 03:17:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 03:17:49,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-28 03:17:49,649 INFO L175 Difference]: Start difference. First operand has 165 places, 201 transitions, 1704 flow. Second operand 7 states and 138 transitions. [2024-06-28 03:17:49,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 2104 flow [2024-06-28 03:17:49,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 211 transitions, 1990 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-28 03:17:49,931 INFO L231 Difference]: Finished difference. Result has 168 places, 201 transitions, 1648 flow [2024-06-28 03:17:49,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1648, PETRI_PLACES=168, PETRI_TRANSITIONS=201} [2024-06-28 03:17:49,932 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-28 03:17:49,932 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 201 transitions, 1648 flow [2024-06-28 03:17:49,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:49,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:49,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:49,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:17:49,933 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:49,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:49,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1006850588, now seen corresponding path program 3 times [2024-06-28 03:17:49,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:49,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191754459] [2024-06-28 03:17:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:49,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:50,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:50,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191754459] [2024-06-28 03:17:50,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191754459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:50,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:50,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:17:50,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074610268] [2024-06-28 03:17:50,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:50,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:17:50,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:50,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:17:50,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:17:50,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:17:50,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 201 transitions, 1648 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:50,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:50,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:17:50,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:51,313 INFO L124 PetriNetUnfolderBase]: 2093/3374 cut-off events. [2024-06-28 03:17:51,313 INFO L125 PetriNetUnfolderBase]: For 321852/321854 co-relation queries the response was YES. [2024-06-28 03:17:51,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28527 conditions, 3374 events. 2093/3374 cut-off events. For 321852/321854 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18263 event pairs, 541 based on Foata normal form. 3/3377 useless extension candidates. Maximal degree in co-relation 28448. Up to 3014 conditions per place. [2024-06-28 03:17:51,342 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 174 selfloop transitions, 26 changer transitions 0/214 dead transitions. [2024-06-28 03:17:51,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 214 transitions, 2132 flow [2024-06-28 03:17:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:17:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:17:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-28 03:17:51,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-28 03:17:51,343 INFO L175 Difference]: Start difference. First operand has 168 places, 201 transitions, 1648 flow. Second operand 7 states and 138 transitions. [2024-06-28 03:17:51,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 214 transitions, 2132 flow [2024-06-28 03:17:51,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 214 transitions, 2060 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 03:17:51,589 INFO L231 Difference]: Finished difference. Result has 169 places, 204 transitions, 1700 flow [2024-06-28 03:17:51,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1700, PETRI_PLACES=169, PETRI_TRANSITIONS=204} [2024-06-28 03:17:51,590 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-28 03:17:51,590 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 204 transitions, 1700 flow [2024-06-28 03:17:51,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:51,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:51,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:51,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:17:51,591 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:51,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:51,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1591768132, now seen corresponding path program 1 times [2024-06-28 03:17:51,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:51,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873894849] [2024-06-28 03:17:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:51,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:52,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:52,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873894849] [2024-06-28 03:17:52,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873894849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:52,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:52,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:17:52,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229784380] [2024-06-28 03:17:52,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:52,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:17:52,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:52,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:17:52,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:17:52,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:52,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 204 transitions, 1700 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:52,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:52,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:52,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:53,267 INFO L124 PetriNetUnfolderBase]: 2488/3889 cut-off events. [2024-06-28 03:17:53,267 INFO L125 PetriNetUnfolderBase]: For 427774/427792 co-relation queries the response was YES. [2024-06-28 03:17:53,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34344 conditions, 3889 events. 2488/3889 cut-off events. For 427774/427792 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20705 event pairs, 428 based on Foata normal form. 16/3901 useless extension candidates. Maximal degree in co-relation 34264. Up to 2555 conditions per place. [2024-06-28 03:17:53,302 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 167 selfloop transitions, 71 changer transitions 0/251 dead transitions. [2024-06-28 03:17:53,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 251 transitions, 2552 flow [2024-06-28 03:17:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:17:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:17:53,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-28 03:17:53,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-28 03:17:53,304 INFO L175 Difference]: Start difference. First operand has 169 places, 204 transitions, 1700 flow. Second operand 9 states and 197 transitions. [2024-06-28 03:17:53,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 251 transitions, 2552 flow [2024-06-28 03:17:53,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 251 transitions, 2450 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:53,622 INFO L231 Difference]: Finished difference. Result has 173 places, 206 transitions, 1796 flow [2024-06-28 03:17:53,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1598, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1796, PETRI_PLACES=173, PETRI_TRANSITIONS=206} [2024-06-28 03:17:53,623 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 128 predicate places. [2024-06-28 03:17:53,623 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 206 transitions, 1796 flow [2024-06-28 03:17:53,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:53,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:53,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:53,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:17:53,623 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:53,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:53,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1005104158, now seen corresponding path program 2 times [2024-06-28 03:17:53,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:53,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744109637] [2024-06-28 03:17:53,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:53,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:54,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:54,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744109637] [2024-06-28 03:17:54,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744109637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:54,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:54,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:17:54,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916735528] [2024-06-28 03:17:54,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:54,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:17:54,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:54,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:17:54,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:17:54,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:54,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 206 transitions, 1796 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:54,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:54,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:54,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:55,608 INFO L124 PetriNetUnfolderBase]: 2584/4058 cut-off events. [2024-06-28 03:17:55,608 INFO L125 PetriNetUnfolderBase]: For 451197/451199 co-relation queries the response was YES. [2024-06-28 03:17:55,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35822 conditions, 4058 events. 2584/4058 cut-off events. For 451197/451199 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 22025 event pairs, 655 based on Foata normal form. 24/4082 useless extension candidates. Maximal degree in co-relation 35741. Up to 3260 conditions per place. [2024-06-28 03:17:55,643 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 167 selfloop transitions, 65 changer transitions 0/245 dead transitions. [2024-06-28 03:17:55,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 245 transitions, 2418 flow [2024-06-28 03:17:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:17:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:17:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-28 03:17:55,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2024-06-28 03:17:55,644 INFO L175 Difference]: Start difference. First operand has 173 places, 206 transitions, 1796 flow. Second operand 9 states and 194 transitions. [2024-06-28 03:17:55,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 245 transitions, 2418 flow [2024-06-28 03:17:55,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 245 transitions, 2332 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-28 03:17:55,958 INFO L231 Difference]: Finished difference. Result has 177 places, 208 transitions, 1900 flow [2024-06-28 03:17:55,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1900, PETRI_PLACES=177, PETRI_TRANSITIONS=208} [2024-06-28 03:17:55,959 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-06-28 03:17:55,959 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 208 transitions, 1900 flow [2024-06-28 03:17:55,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:55,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:55,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:55,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:17:55,960 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:55,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1005281788, now seen corresponding path program 3 times [2024-06-28 03:17:55,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:55,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118828947] [2024-06-28 03:17:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:55,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:56,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:56,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:56,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118828947] [2024-06-28 03:17:56,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118828947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:56,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:56,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:17:56,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253876724] [2024-06-28 03:17:56,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:56,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:17:56,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:56,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:17:56,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:17:56,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:56,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 208 transitions, 1900 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:56,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:56,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:56,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:17:57,927 INFO L124 PetriNetUnfolderBase]: 2642/4171 cut-off events. [2024-06-28 03:17:57,928 INFO L125 PetriNetUnfolderBase]: For 462061/462063 co-relation queries the response was YES. [2024-06-28 03:17:57,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36970 conditions, 4171 events. 2642/4171 cut-off events. For 462061/462063 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 22954 event pairs, 660 based on Foata normal form. 16/4187 useless extension candidates. Maximal degree in co-relation 36887. Up to 3248 conditions per place. [2024-06-28 03:17:57,968 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 170 selfloop transitions, 67 changer transitions 0/250 dead transitions. [2024-06-28 03:17:57,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 250 transitions, 2526 flow [2024-06-28 03:17:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:17:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:17:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-28 03:17:57,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-28 03:17:57,978 INFO L175 Difference]: Start difference. First operand has 177 places, 208 transitions, 1900 flow. Second operand 9 states and 197 transitions. [2024-06-28 03:17:57,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 250 transitions, 2526 flow [2024-06-28 03:17:58,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 250 transitions, 2366 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 03:17:58,397 INFO L231 Difference]: Finished difference. Result has 179 places, 209 transitions, 1910 flow [2024-06-28 03:17:58,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1910, PETRI_PLACES=179, PETRI_TRANSITIONS=209} [2024-06-28 03:17:58,398 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 134 predicate places. [2024-06-28 03:17:58,398 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 209 transitions, 1910 flow [2024-06-28 03:17:58,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:58,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:17:58,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:17:58,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 03:17:58,399 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:17:58,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:17:58,399 INFO L85 PathProgramCache]: Analyzing trace with hash 42339396, now seen corresponding path program 4 times [2024-06-28 03:17:58,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:17:58,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961478499] [2024-06-28 03:17:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:17:58,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:17:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:17:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:17:59,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:17:59,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961478499] [2024-06-28 03:17:59,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961478499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:17:59,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:17:59,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:17:59,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945399519] [2024-06-28 03:17:59,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:17:59,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:17:59,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:17:59,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:17:59,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:17:59,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:17:59,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 209 transitions, 1910 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:17:59,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:17:59,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:17:59,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:00,307 INFO L124 PetriNetUnfolderBase]: 2700/4274 cut-off events. [2024-06-28 03:18:00,307 INFO L125 PetriNetUnfolderBase]: For 478518/478520 co-relation queries the response was YES. [2024-06-28 03:18:00,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37543 conditions, 4274 events. 2700/4274 cut-off events. For 478518/478520 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 23780 event pairs, 670 based on Foata normal form. 16/4290 useless extension candidates. Maximal degree in co-relation 37459. Up to 3213 conditions per place. [2024-06-28 03:18:00,343 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 169 selfloop transitions, 70 changer transitions 0/252 dead transitions. [2024-06-28 03:18:00,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 252 transitions, 2544 flow [2024-06-28 03:18:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:00,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-28 03:18:00,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:18:00,344 INFO L175 Difference]: Start difference. First operand has 179 places, 209 transitions, 1910 flow. Second operand 9 states and 198 transitions. [2024-06-28 03:18:00,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 252 transitions, 2544 flow [2024-06-28 03:18:00,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 252 transitions, 2392 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 03:18:00,660 INFO L231 Difference]: Finished difference. Result has 181 places, 210 transitions, 1936 flow [2024-06-28 03:18:00,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1936, PETRI_PLACES=181, PETRI_TRANSITIONS=210} [2024-06-28 03:18:00,660 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-28 03:18:00,660 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 210 transitions, 1936 flow [2024-06-28 03:18:00,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:00,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:00,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:00,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 03:18:00,661 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:00,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:00,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1082841086, now seen corresponding path program 1 times [2024-06-28 03:18:00,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:00,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167219483] [2024-06-28 03:18:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:00,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:01,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:01,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167219483] [2024-06-28 03:18:01,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167219483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:01,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:01,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:18:01,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727965914] [2024-06-28 03:18:01,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:01,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:18:01,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:01,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:18:01,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:18:01,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:01,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 210 transitions, 1936 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:01,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:01,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:01,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:02,367 INFO L124 PetriNetUnfolderBase]: 2649/4218 cut-off events. [2024-06-28 03:18:02,367 INFO L125 PetriNetUnfolderBase]: For 474750/474752 co-relation queries the response was YES. [2024-06-28 03:18:02,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37395 conditions, 4218 events. 2649/4218 cut-off events. For 474750/474752 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23822 event pairs, 755 based on Foata normal form. 4/4210 useless extension candidates. Maximal degree in co-relation 37310. Up to 3830 conditions per place. [2024-06-28 03:18:02,408 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 186 selfloop transitions, 28 changer transitions 0/237 dead transitions. [2024-06-28 03:18:02,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 237 transitions, 2496 flow [2024-06-28 03:18:02,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:18:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:18:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 03:18:02,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-28 03:18:02,409 INFO L175 Difference]: Start difference. First operand has 181 places, 210 transitions, 1936 flow. Second operand 8 states and 161 transitions. [2024-06-28 03:18:02,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 237 transitions, 2496 flow [2024-06-28 03:18:02,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 237 transitions, 2336 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-28 03:18:02,837 INFO L231 Difference]: Finished difference. Result has 182 places, 214 transitions, 1921 flow [2024-06-28 03:18:02,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1921, PETRI_PLACES=182, PETRI_TRANSITIONS=214} [2024-06-28 03:18:02,838 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-06-28 03:18:02,838 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 214 transitions, 1921 flow [2024-06-28 03:18:02,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:02,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:02,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:02,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 03:18:02,839 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:02,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:02,839 INFO L85 PathProgramCache]: Analyzing trace with hash -327739580, now seen corresponding path program 5 times [2024-06-28 03:18:02,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:02,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634623148] [2024-06-28 03:18:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:02,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:03,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:03,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634623148] [2024-06-28 03:18:03,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634623148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:03,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:03,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:03,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767625899] [2024-06-28 03:18:03,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:03,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:03,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:03,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:03,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:03,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:03,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 214 transitions, 1921 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:03,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:03,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:03,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:04,820 INFO L124 PetriNetUnfolderBase]: 2843/4515 cut-off events. [2024-06-28 03:18:04,821 INFO L125 PetriNetUnfolderBase]: For 525952/525954 co-relation queries the response was YES. [2024-06-28 03:18:04,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39880 conditions, 4515 events. 2843/4515 cut-off events. For 525952/525954 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25567 event pairs, 540 based on Foata normal form. 16/4531 useless extension candidates. Maximal degree in co-relation 39794. Up to 3331 conditions per place. [2024-06-28 03:18:04,864 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 172 selfloop transitions, 77 changer transitions 0/263 dead transitions. [2024-06-28 03:18:04,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 263 transitions, 2819 flow [2024-06-28 03:18:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-28 03:18:04,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126262626262627 [2024-06-28 03:18:04,866 INFO L175 Difference]: Start difference. First operand has 182 places, 214 transitions, 1921 flow. Second operand 9 states and 203 transitions. [2024-06-28 03:18:04,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 263 transitions, 2819 flow [2024-06-28 03:18:05,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 263 transitions, 2702 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-28 03:18:05,284 INFO L231 Difference]: Finished difference. Result has 185 places, 216 transitions, 2030 flow [2024-06-28 03:18:05,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2030, PETRI_PLACES=185, PETRI_TRANSITIONS=216} [2024-06-28 03:18:05,284 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 140 predicate places. [2024-06-28 03:18:05,284 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 216 transitions, 2030 flow [2024-06-28 03:18:05,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:05,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:05,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:05,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 03:18:05,285 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:05,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:05,285 INFO L85 PathProgramCache]: Analyzing trace with hash -654744440, now seen corresponding path program 6 times [2024-06-28 03:18:05,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:05,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817212101] [2024-06-28 03:18:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:05,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:06,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:06,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:06,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817212101] [2024-06-28 03:18:06,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817212101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:06,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:06,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:06,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368134934] [2024-06-28 03:18:06,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:06,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:06,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:06,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:06,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:06,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:06,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 216 transitions, 2030 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:06,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:06,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:06,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:07,437 INFO L124 PetriNetUnfolderBase]: 2918/4655 cut-off events. [2024-06-28 03:18:07,438 INFO L125 PetriNetUnfolderBase]: For 552184/552186 co-relation queries the response was YES. [2024-06-28 03:18:07,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41158 conditions, 4655 events. 2918/4655 cut-off events. For 552184/552186 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 26796 event pairs, 762 based on Foata normal form. 20/4675 useless extension candidates. Maximal degree in co-relation 41071. Up to 3824 conditions per place. [2024-06-28 03:18:07,477 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 175 selfloop transitions, 66 changer transitions 0/255 dead transitions. [2024-06-28 03:18:07,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 255 transitions, 2662 flow [2024-06-28 03:18:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:07,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-28 03:18:07,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48737373737373735 [2024-06-28 03:18:07,478 INFO L175 Difference]: Start difference. First operand has 185 places, 216 transitions, 2030 flow. Second operand 9 states and 193 transitions. [2024-06-28 03:18:07,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 255 transitions, 2662 flow [2024-06-28 03:18:07,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 255 transitions, 2551 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 03:18:07,865 INFO L231 Difference]: Finished difference. Result has 189 places, 217 transitions, 2094 flow [2024-06-28 03:18:07,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1919, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2094, PETRI_PLACES=189, PETRI_TRANSITIONS=217} [2024-06-28 03:18:07,866 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-28 03:18:07,866 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 217 transitions, 2094 flow [2024-06-28 03:18:07,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:07,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:07,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:07,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 03:18:07,867 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:07,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:07,867 INFO L85 PathProgramCache]: Analyzing trace with hash -831880610, now seen corresponding path program 7 times [2024-06-28 03:18:07,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:07,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616181259] [2024-06-28 03:18:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:07,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:08,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:08,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616181259] [2024-06-28 03:18:08,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616181259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:08,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:08,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:08,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95129836] [2024-06-28 03:18:08,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:08,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:08,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:08,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:08,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:08,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:08,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 217 transitions, 2094 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:08,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:08,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:08,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:09,990 INFO L124 PetriNetUnfolderBase]: 3087/4934 cut-off events. [2024-06-28 03:18:09,990 INFO L125 PetriNetUnfolderBase]: For 595484/595486 co-relation queries the response was YES. [2024-06-28 03:18:10,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44104 conditions, 4934 events. 3087/4934 cut-off events. For 595484/595486 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28842 event pairs, 766 based on Foata normal form. 16/4950 useless extension candidates. Maximal degree in co-relation 44015. Up to 3947 conditions per place. [2024-06-28 03:18:10,042 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 180 selfloop transitions, 72 changer transitions 0/266 dead transitions. [2024-06-28 03:18:10,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 266 transitions, 3016 flow [2024-06-28 03:18:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:10,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:10,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-28 03:18:10,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126262626262627 [2024-06-28 03:18:10,044 INFO L175 Difference]: Start difference. First operand has 189 places, 217 transitions, 2094 flow. Second operand 9 states and 203 transitions. [2024-06-28 03:18:10,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 266 transitions, 3016 flow [2024-06-28 03:18:10,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 266 transitions, 2867 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-28 03:18:10,402 INFO L231 Difference]: Finished difference. Result has 191 places, 219 transitions, 2169 flow [2024-06-28 03:18:10,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2169, PETRI_PLACES=191, PETRI_TRANSITIONS=219} [2024-06-28 03:18:10,402 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 146 predicate places. [2024-06-28 03:18:10,403 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 219 transitions, 2169 flow [2024-06-28 03:18:10,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:10,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:10,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:10,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 03:18:10,403 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:10,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1884081114, now seen corresponding path program 8 times [2024-06-28 03:18:10,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:10,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302169315] [2024-06-28 03:18:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:10,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:11,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:11,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302169315] [2024-06-28 03:18:11,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302169315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:11,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:11,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:11,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837126829] [2024-06-28 03:18:11,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:11,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:11,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:11,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:11,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:11,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 219 transitions, 2169 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:11,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:11,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:11,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:12,521 INFO L124 PetriNetUnfolderBase]: 3051/4873 cut-off events. [2024-06-28 03:18:12,521 INFO L125 PetriNetUnfolderBase]: For 590108/590110 co-relation queries the response was YES. [2024-06-28 03:18:12,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42960 conditions, 4873 events. 3051/4873 cut-off events. For 590108/590110 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28421 event pairs, 768 based on Foata normal form. 20/4893 useless extension candidates. Maximal degree in co-relation 42870. Up to 4047 conditions per place. [2024-06-28 03:18:12,573 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 176 selfloop transitions, 70 changer transitions 0/260 dead transitions. [2024-06-28 03:18:12,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 260 transitions, 2785 flow [2024-06-28 03:18:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-28 03:18:12,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-28 03:18:12,574 INFO L175 Difference]: Start difference. First operand has 191 places, 219 transitions, 2169 flow. Second operand 9 states and 197 transitions. [2024-06-28 03:18:12,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 260 transitions, 2785 flow [2024-06-28 03:18:13,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 260 transitions, 2653 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-28 03:18:13,025 INFO L231 Difference]: Finished difference. Result has 195 places, 219 transitions, 2184 flow [2024-06-28 03:18:13,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2184, PETRI_PLACES=195, PETRI_TRANSITIONS=219} [2024-06-28 03:18:13,025 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 150 predicate places. [2024-06-28 03:18:13,026 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 219 transitions, 2184 flow [2024-06-28 03:18:13,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:13,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:13,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:13,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 03:18:13,026 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:13,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:13,026 INFO L85 PathProgramCache]: Analyzing trace with hash -156744200, now seen corresponding path program 9 times [2024-06-28 03:18:13,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:13,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175111947] [2024-06-28 03:18:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:13,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:13,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:13,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175111947] [2024-06-28 03:18:13,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175111947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:13,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:13,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:13,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312631996] [2024-06-28 03:18:13,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:13,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:13,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:13,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:13,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:14,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:14,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 219 transitions, 2184 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:14,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:14,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:14,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:15,225 INFO L124 PetriNetUnfolderBase]: 3126/5008 cut-off events. [2024-06-28 03:18:15,225 INFO L125 PetriNetUnfolderBase]: For 607140/607142 co-relation queries the response was YES. [2024-06-28 03:18:15,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43866 conditions, 5008 events. 3126/5008 cut-off events. For 607140/607142 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 29527 event pairs, 797 based on Foata normal form. 20/5028 useless extension candidates. Maximal degree in co-relation 43774. Up to 4172 conditions per place. [2024-06-28 03:18:15,274 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 180 selfloop transitions, 65 changer transitions 0/259 dead transitions. [2024-06-28 03:18:15,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 259 transitions, 2832 flow [2024-06-28 03:18:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:15,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-28 03:18:15,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-28 03:18:15,275 INFO L175 Difference]: Start difference. First operand has 195 places, 219 transitions, 2184 flow. Second operand 9 states and 195 transitions. [2024-06-28 03:18:15,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 259 transitions, 2832 flow [2024-06-28 03:18:15,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 259 transitions, 2687 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 03:18:15,666 INFO L231 Difference]: Finished difference. Result has 196 places, 220 transitions, 2216 flow [2024-06-28 03:18:15,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2216, PETRI_PLACES=196, PETRI_TRANSITIONS=220} [2024-06-28 03:18:15,667 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 151 predicate places. [2024-06-28 03:18:15,667 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 220 transitions, 2216 flow [2024-06-28 03:18:15,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:15,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:15,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:15,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 03:18:15,668 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:15,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash -661178180, now seen corresponding path program 10 times [2024-06-28 03:18:15,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:15,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204206030] [2024-06-28 03:18:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:15,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:16,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:16,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204206030] [2024-06-28 03:18:16,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204206030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:16,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:16,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:16,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970464399] [2024-06-28 03:18:16,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:16,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:16,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:16,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:16,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:16,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 220 transitions, 2216 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:16,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:16,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:16,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:17,785 INFO L124 PetriNetUnfolderBase]: 3184/5106 cut-off events. [2024-06-28 03:18:17,785 INFO L125 PetriNetUnfolderBase]: For 622693/622695 co-relation queries the response was YES. [2024-06-28 03:18:17,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44694 conditions, 5106 events. 3184/5106 cut-off events. For 622693/622695 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 30276 event pairs, 783 based on Foata normal form. 16/5122 useless extension candidates. Maximal degree in co-relation 44601. Up to 4040 conditions per place. [2024-06-28 03:18:17,837 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 181 selfloop transitions, 68 changer transitions 0/263 dead transitions. [2024-06-28 03:18:17,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 263 transitions, 2884 flow [2024-06-28 03:18:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-28 03:18:17,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-28 03:18:17,838 INFO L175 Difference]: Start difference. First operand has 196 places, 220 transitions, 2216 flow. Second operand 9 states and 197 transitions. [2024-06-28 03:18:17,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 263 transitions, 2884 flow [2024-06-28 03:18:18,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 263 transitions, 2733 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 03:18:18,322 INFO L231 Difference]: Finished difference. Result has 198 places, 221 transitions, 2249 flow [2024-06-28 03:18:18,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2249, PETRI_PLACES=198, PETRI_TRANSITIONS=221} [2024-06-28 03:18:18,323 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-28 03:18:18,323 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 221 transitions, 2249 flow [2024-06-28 03:18:18,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:18,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:18,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:18,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 03:18:18,323 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:18,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:18,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1495083241, now seen corresponding path program 1 times [2024-06-28 03:18:18,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:18,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646499761] [2024-06-28 03:18:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:18,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:19,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:19,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:19,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646499761] [2024-06-28 03:18:19,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646499761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:19,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:19,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:18:19,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556767919] [2024-06-28 03:18:19,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:19,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:18:19,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:19,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:18:19,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:18:19,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:18:19,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 221 transitions, 2249 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:19,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:19,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:18:19,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:19,945 INFO L124 PetriNetUnfolderBase]: 3024/4924 cut-off events. [2024-06-28 03:18:19,945 INFO L125 PetriNetUnfolderBase]: For 618050/618052 co-relation queries the response was YES. [2024-06-28 03:18:19,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44015 conditions, 4924 events. 3024/4924 cut-off events. For 618050/618052 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 29867 event pairs, 861 based on Foata normal form. 4/4892 useless extension candidates. Maximal degree in co-relation 43921. Up to 4403 conditions per place. [2024-06-28 03:18:19,996 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 189 selfloop transitions, 23 changer transitions 0/244 dead transitions. [2024-06-28 03:18:19,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 244 transitions, 2774 flow [2024-06-28 03:18:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:18:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:18:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-28 03:18:19,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-28 03:18:19,997 INFO L175 Difference]: Start difference. First operand has 198 places, 221 transitions, 2249 flow. Second operand 7 states and 148 transitions. [2024-06-28 03:18:19,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 244 transitions, 2774 flow [2024-06-28 03:18:20,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 244 transitions, 2610 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 03:18:20,519 INFO L231 Difference]: Finished difference. Result has 198 places, 225 transitions, 2199 flow [2024-06-28 03:18:20,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2199, PETRI_PLACES=198, PETRI_TRANSITIONS=225} [2024-06-28 03:18:20,520 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-28 03:18:20,520 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 225 transitions, 2199 flow [2024-06-28 03:18:20,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:20,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:20,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:20,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 03:18:20,520 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:20,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:20,521 INFO L85 PathProgramCache]: Analyzing trace with hash -896414541, now seen corresponding path program 2 times [2024-06-28 03:18:20,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:20,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722224023] [2024-06-28 03:18:20,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:20,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:21,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:21,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722224023] [2024-06-28 03:18:21,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722224023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:21,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:21,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:18:21,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541066334] [2024-06-28 03:18:21,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:21,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:18:21,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:21,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:18:21,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:18:21,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:18:21,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 225 transitions, 2199 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:21,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:21,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:18:21,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:22,206 INFO L124 PetriNetUnfolderBase]: 3026/4927 cut-off events. [2024-06-28 03:18:22,206 INFO L125 PetriNetUnfolderBase]: For 629271/629273 co-relation queries the response was YES. [2024-06-28 03:18:22,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43750 conditions, 4927 events. 3026/4927 cut-off events. For 629271/629273 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 29911 event pairs, 861 based on Foata normal form. 4/4895 useless extension candidates. Maximal degree in co-relation 43655. Up to 4374 conditions per place. [2024-06-28 03:18:22,255 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 178 selfloop transitions, 35 changer transitions 0/245 dead transitions. [2024-06-28 03:18:22,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 245 transitions, 2851 flow [2024-06-28 03:18:22,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:18:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:18:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-28 03:18:22,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-28 03:18:22,256 INFO L175 Difference]: Start difference. First operand has 198 places, 225 transitions, 2199 flow. Second operand 7 states and 147 transitions. [2024-06-28 03:18:22,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 245 transitions, 2851 flow [2024-06-28 03:18:22,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 245 transitions, 2778 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 03:18:22,735 INFO L231 Difference]: Finished difference. Result has 200 places, 228 transitions, 2259 flow [2024-06-28 03:18:22,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2259, PETRI_PLACES=200, PETRI_TRANSITIONS=228} [2024-06-28 03:18:22,735 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 155 predicate places. [2024-06-28 03:18:22,735 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 228 transitions, 2259 flow [2024-06-28 03:18:22,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:22,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:22,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:22,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 03:18:22,736 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:22,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1214274799, now seen corresponding path program 1 times [2024-06-28 03:18:22,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:22,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093664655] [2024-06-28 03:18:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:22,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:23,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:23,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093664655] [2024-06-28 03:18:23,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093664655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:23,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:23,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:18:23,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386589928] [2024-06-28 03:18:23,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:23,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:18:23,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:23,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:18:23,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:18:23,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:23,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 228 transitions, 2259 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:23,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:23,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:23,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:24,591 INFO L124 PetriNetUnfolderBase]: 3110/5012 cut-off events. [2024-06-28 03:18:24,591 INFO L125 PetriNetUnfolderBase]: For 642699/642699 co-relation queries the response was YES. [2024-06-28 03:18:24,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44379 conditions, 5012 events. 3110/5012 cut-off events. For 642699/642699 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30029 event pairs, 892 based on Foata normal form. 1/4977 useless extension candidates. Maximal degree in co-relation 44283. Up to 4668 conditions per place. [2024-06-28 03:18:24,644 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 208 selfloop transitions, 17 changer transitions 0/248 dead transitions. [2024-06-28 03:18:24,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 248 transitions, 2809 flow [2024-06-28 03:18:24,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:18:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:18:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:18:24,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-28 03:18:24,645 INFO L175 Difference]: Start difference. First operand has 200 places, 228 transitions, 2259 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:18:24,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 248 transitions, 2809 flow [2024-06-28 03:18:25,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 248 transitions, 2726 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 03:18:25,247 INFO L231 Difference]: Finished difference. Result has 204 places, 231 transitions, 2280 flow [2024-06-28 03:18:25,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2280, PETRI_PLACES=204, PETRI_TRANSITIONS=231} [2024-06-28 03:18:25,247 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-28 03:18:25,247 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 231 transitions, 2280 flow [2024-06-28 03:18:25,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:25,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:25,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:25,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 03:18:25,248 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:25,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1214274334, now seen corresponding path program 2 times [2024-06-28 03:18:25,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:25,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325418481] [2024-06-28 03:18:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:26,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325418481] [2024-06-28 03:18:26,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325418481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:26,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:26,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:18:26,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331076783] [2024-06-28 03:18:26,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:26,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:18:26,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:26,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:18:26,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:18:26,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:26,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 231 transitions, 2280 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:26,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:26,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:26,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:27,056 INFO L124 PetriNetUnfolderBase]: 3156/5076 cut-off events. [2024-06-28 03:18:27,057 INFO L125 PetriNetUnfolderBase]: For 666101/666103 co-relation queries the response was YES. [2024-06-28 03:18:27,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45609 conditions, 5076 events. 3156/5076 cut-off events. For 666101/666103 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30319 event pairs, 888 based on Foata normal form. 4/5044 useless extension candidates. Maximal degree in co-relation 45512. Up to 4577 conditions per place. [2024-06-28 03:18:27,110 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 192 selfloop transitions, 44 changer transitions 0/259 dead transitions. [2024-06-28 03:18:27,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 259 transitions, 3264 flow [2024-06-28 03:18:27,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:18:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:18:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:18:27,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-28 03:18:27,111 INFO L175 Difference]: Start difference. First operand has 204 places, 231 transitions, 2280 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:18:27,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 259 transitions, 3264 flow [2024-06-28 03:18:27,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 259 transitions, 3182 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 03:18:27,809 INFO L231 Difference]: Finished difference. Result has 207 places, 239 transitions, 2480 flow [2024-06-28 03:18:27,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2480, PETRI_PLACES=207, PETRI_TRANSITIONS=239} [2024-06-28 03:18:27,810 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 162 predicate places. [2024-06-28 03:18:27,810 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 239 transitions, 2480 flow [2024-06-28 03:18:27,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:27,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:27,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:27,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 03:18:27,810 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:27,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:27,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1214261314, now seen corresponding path program 3 times [2024-06-28 03:18:27,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:27,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358202754] [2024-06-28 03:18:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:27,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:28,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:28,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358202754] [2024-06-28 03:18:28,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358202754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:28,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:28,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:18:28,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735551971] [2024-06-28 03:18:28,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:28,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:18:28,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:28,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:18:28,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:18:28,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:28,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 239 transitions, 2480 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:28,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:28,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:28,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:29,565 INFO L124 PetriNetUnfolderBase]: 3160/5082 cut-off events. [2024-06-28 03:18:29,565 INFO L125 PetriNetUnfolderBase]: For 687594/687596 co-relation queries the response was YES. [2024-06-28 03:18:29,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46666 conditions, 5082 events. 3160/5082 cut-off events. For 687594/687596 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 30334 event pairs, 888 based on Foata normal form. 4/5050 useless extension candidates. Maximal degree in co-relation 46567. Up to 4584 conditions per place. [2024-06-28 03:18:29,623 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 190 selfloop transitions, 48 changer transitions 0/261 dead transitions. [2024-06-28 03:18:29,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 261 transitions, 3233 flow [2024-06-28 03:18:29,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:18:29,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:18:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:18:29,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-28 03:18:29,624 INFO L175 Difference]: Start difference. First operand has 207 places, 239 transitions, 2480 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:18:29,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 261 transitions, 3233 flow [2024-06-28 03:18:30,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 261 transitions, 3077 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-28 03:18:30,252 INFO L231 Difference]: Finished difference. Result has 211 places, 243 transitions, 2524 flow [2024-06-28 03:18:30,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2524, PETRI_PLACES=211, PETRI_TRANSITIONS=243} [2024-06-28 03:18:30,252 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 166 predicate places. [2024-06-28 03:18:30,252 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 243 transitions, 2524 flow [2024-06-28 03:18:30,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:30,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:30,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:30,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 03:18:30,253 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:30,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:30,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1440718770, now seen corresponding path program 11 times [2024-06-28 03:18:30,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:30,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462220136] [2024-06-28 03:18:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:30,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:31,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:31,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462220136] [2024-06-28 03:18:31,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462220136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:31,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:31,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:31,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113758603] [2024-06-28 03:18:31,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:31,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:31,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:31,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:31,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:31,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:31,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 243 transitions, 2524 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:31,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:31,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:31,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:32,437 INFO L124 PetriNetUnfolderBase]: 3315/5329 cut-off events. [2024-06-28 03:18:32,438 INFO L125 PetriNetUnfolderBase]: For 742910/742912 co-relation queries the response was YES. [2024-06-28 03:18:32,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48310 conditions, 5329 events. 3315/5329 cut-off events. For 742910/742912 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 31891 event pairs, 844 based on Foata normal form. 22/5350 useless extension candidates. Maximal degree in co-relation 48209. Up to 4458 conditions per place. [2024-06-28 03:18:32,495 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 200 selfloop transitions, 63 changer transitions 0/280 dead transitions. [2024-06-28 03:18:32,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 280 transitions, 3206 flow [2024-06-28 03:18:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:32,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:32,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-28 03:18:32,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-28 03:18:32,497 INFO L175 Difference]: Start difference. First operand has 211 places, 243 transitions, 2524 flow. Second operand 9 states and 189 transitions. [2024-06-28 03:18:32,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 280 transitions, 3206 flow [2024-06-28 03:18:33,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 280 transitions, 3082 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 03:18:33,212 INFO L231 Difference]: Finished difference. Result has 215 places, 244 transitions, 2577 flow [2024-06-28 03:18:33,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2577, PETRI_PLACES=215, PETRI_TRANSITIONS=244} [2024-06-28 03:18:33,212 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-28 03:18:33,212 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 244 transitions, 2577 flow [2024-06-28 03:18:33,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:33,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:33,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:33,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 03:18:33,213 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:33,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:33,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1440714120, now seen corresponding path program 12 times [2024-06-28 03:18:33,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:33,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604270146] [2024-06-28 03:18:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:33,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:34,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:34,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604270146] [2024-06-28 03:18:34,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604270146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:34,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:34,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:34,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793505283] [2024-06-28 03:18:34,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:34,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:34,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:34,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:34,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:34,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:34,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 244 transitions, 2577 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:34,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:34,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:34,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:35,404 INFO L124 PetriNetUnfolderBase]: 3373/5427 cut-off events. [2024-06-28 03:18:35,405 INFO L125 PetriNetUnfolderBase]: For 760276/760278 co-relation queries the response was YES. [2024-06-28 03:18:35,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49324 conditions, 5427 events. 3373/5427 cut-off events. For 760276/760278 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 32630 event pairs, 830 based on Foata normal form. 18/5444 useless extension candidates. Maximal degree in co-relation 49222. Up to 4265 conditions per place. [2024-06-28 03:18:35,464 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 203 selfloop transitions, 66 changer transitions 0/286 dead transitions. [2024-06-28 03:18:35,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 286 transitions, 3521 flow [2024-06-28 03:18:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:35,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-28 03:18:35,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48737373737373735 [2024-06-28 03:18:35,465 INFO L175 Difference]: Start difference. First operand has 215 places, 244 transitions, 2577 flow. Second operand 9 states and 193 transitions. [2024-06-28 03:18:35,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 286 transitions, 3521 flow [2024-06-28 03:18:36,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 286 transitions, 3370 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-28 03:18:36,316 INFO L231 Difference]: Finished difference. Result has 217 places, 245 transitions, 2608 flow [2024-06-28 03:18:36,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2608, PETRI_PLACES=217, PETRI_TRANSITIONS=245} [2024-06-28 03:18:36,317 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-28 03:18:36,317 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 245 transitions, 2608 flow [2024-06-28 03:18:36,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:36,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:36,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:36,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 03:18:36,318 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:36,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1401834906, now seen corresponding path program 13 times [2024-06-28 03:18:36,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:36,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367591730] [2024-06-28 03:18:36,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:36,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:37,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:37,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367591730] [2024-06-28 03:18:37,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367591730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:37,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:37,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:37,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452387192] [2024-06-28 03:18:37,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:37,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:37,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:37,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:37,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:37,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 245 transitions, 2608 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:37,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:37,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:37,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:38,614 INFO L124 PetriNetUnfolderBase]: 3448/5547 cut-off events. [2024-06-28 03:18:38,615 INFO L125 PetriNetUnfolderBase]: For 790127/790129 co-relation queries the response was YES. [2024-06-28 03:18:38,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50226 conditions, 5547 events. 3448/5547 cut-off events. For 790127/790129 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33573 event pairs, 865 based on Foata normal form. 22/5568 useless extension candidates. Maximal degree in co-relation 50123. Up to 4681 conditions per place. [2024-06-28 03:18:38,671 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 198 selfloop transitions, 66 changer transitions 0/281 dead transitions. [2024-06-28 03:18:38,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 281 transitions, 3292 flow [2024-06-28 03:18:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-28 03:18:38,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-28 03:18:38,672 INFO L175 Difference]: Start difference. First operand has 217 places, 245 transitions, 2608 flow. Second operand 9 states and 187 transitions. [2024-06-28 03:18:38,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 281 transitions, 3292 flow [2024-06-28 03:18:39,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 281 transitions, 3049 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-28 03:18:39,313 INFO L231 Difference]: Finished difference. Result has 218 places, 246 transitions, 2552 flow [2024-06-28 03:18:39,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2552, PETRI_PLACES=218, PETRI_TRANSITIONS=246} [2024-06-28 03:18:39,314 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 173 predicate places. [2024-06-28 03:18:39,314 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 246 transitions, 2552 flow [2024-06-28 03:18:39,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:39,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:39,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:39,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 03:18:39,314 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:39,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash -763416124, now seen corresponding path program 14 times [2024-06-28 03:18:39,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:39,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808960225] [2024-06-28 03:18:39,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:39,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:40,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:40,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:40,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808960225] [2024-06-28 03:18:40,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808960225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:40,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:40,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:18:40,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950169806] [2024-06-28 03:18:40,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:40,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:18:40,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:40,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:18:40,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:18:40,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:40,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 246 transitions, 2552 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:40,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:40,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:40,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:41,632 INFO L124 PetriNetUnfolderBase]: 3412/5491 cut-off events. [2024-06-28 03:18:41,632 INFO L125 PetriNetUnfolderBase]: For 767168/767170 co-relation queries the response was YES. [2024-06-28 03:18:41,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48246 conditions, 5491 events. 3412/5491 cut-off events. For 767168/767170 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33205 event pairs, 842 based on Foata normal form. 22/5512 useless extension candidates. Maximal degree in co-relation 48143. Up to 4625 conditions per place. [2024-06-28 03:18:41,690 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 203 selfloop transitions, 62 changer transitions 0/282 dead transitions. [2024-06-28 03:18:41,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 282 transitions, 3196 flow [2024-06-28 03:18:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:18:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:18:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-28 03:18:41,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-28 03:18:41,691 INFO L175 Difference]: Start difference. First operand has 218 places, 246 transitions, 2552 flow. Second operand 9 states and 190 transitions. [2024-06-28 03:18:41,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 282 transitions, 3196 flow [2024-06-28 03:18:42,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 282 transitions, 3019 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-28 03:18:42,383 INFO L231 Difference]: Finished difference. Result has 220 places, 246 transitions, 2506 flow [2024-06-28 03:18:42,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2506, PETRI_PLACES=220, PETRI_TRANSITIONS=246} [2024-06-28 03:18:42,383 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-28 03:18:42,384 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 246 transitions, 2506 flow [2024-06-28 03:18:42,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:42,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:42,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:42,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 03:18:42,384 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:42,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:42,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1869751151, now seen corresponding path program 3 times [2024-06-28 03:18:42,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:42,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825535714] [2024-06-28 03:18:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:42,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:43,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:43,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825535714] [2024-06-28 03:18:43,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825535714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:43,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:43,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:18:43,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007462469] [2024-06-28 03:18:43,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:43,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:18:43,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:43,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:18:43,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:18:43,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:18:43,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 246 transitions, 2506 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:43,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:43,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:18:43,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:44,134 INFO L124 PetriNetUnfolderBase]: 3237/5270 cut-off events. [2024-06-28 03:18:44,135 INFO L125 PetriNetUnfolderBase]: For 741329/741329 co-relation queries the response was YES. [2024-06-28 03:18:44,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46992 conditions, 5270 events. 3237/5270 cut-off events. For 741329/741329 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 32413 event pairs, 909 based on Foata normal form. 1/5222 useless extension candidates. Maximal degree in co-relation 46888. Up to 4725 conditions per place. [2024-06-28 03:18:44,194 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 204 selfloop transitions, 23 changer transitions 0/262 dead transitions. [2024-06-28 03:18:44,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 262 transitions, 3000 flow [2024-06-28 03:18:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:18:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:18:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-28 03:18:44,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-28 03:18:44,194 INFO L175 Difference]: Start difference. First operand has 220 places, 246 transitions, 2506 flow. Second operand 7 states and 145 transitions. [2024-06-28 03:18:44,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 262 transitions, 3000 flow [2024-06-28 03:18:44,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 262 transitions, 2839 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-28 03:18:44,927 INFO L231 Difference]: Finished difference. Result has 219 places, 246 transitions, 2397 flow [2024-06-28 03:18:44,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2397, PETRI_PLACES=219, PETRI_TRANSITIONS=246} [2024-06-28 03:18:44,927 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-28 03:18:44,927 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 246 transitions, 2397 flow [2024-06-28 03:18:44,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:44,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:44,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:44,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 03:18:44,928 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:44,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:44,928 INFO L85 PathProgramCache]: Analyzing trace with hash -683989521, now seen corresponding path program 4 times [2024-06-28 03:18:44,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:44,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761127486] [2024-06-28 03:18:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:44,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:45,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:45,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761127486] [2024-06-28 03:18:45,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761127486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:45,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:45,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:18:45,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865990520] [2024-06-28 03:18:45,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:45,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:18:45,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:45,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:18:45,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:18:45,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:18:45,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 246 transitions, 2397 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:45,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:45,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:18:45,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:46,680 INFO L124 PetriNetUnfolderBase]: 3242/5277 cut-off events. [2024-06-28 03:18:46,680 INFO L125 PetriNetUnfolderBase]: For 758668/758668 co-relation queries the response was YES. [2024-06-28 03:18:46,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46960 conditions, 5277 events. 3242/5277 cut-off events. For 758668/758668 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 32436 event pairs, 907 based on Foata normal form. 1/5229 useless extension candidates. Maximal degree in co-relation 46855. Up to 4720 conditions per place. [2024-06-28 03:18:46,742 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 195 selfloop transitions, 32 changer transitions 0/262 dead transitions. [2024-06-28 03:18:46,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 262 transitions, 2931 flow [2024-06-28 03:18:46,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:18:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:18:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-28 03:18:46,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-28 03:18:46,743 INFO L175 Difference]: Start difference. First operand has 219 places, 246 transitions, 2397 flow. Second operand 7 states and 144 transitions. [2024-06-28 03:18:46,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 262 transitions, 2931 flow [2024-06-28 03:18:47,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 262 transitions, 2832 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 03:18:47,500 INFO L231 Difference]: Finished difference. Result has 219 places, 249 transitions, 2422 flow [2024-06-28 03:18:47,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2422, PETRI_PLACES=219, PETRI_TRANSITIONS=249} [2024-06-28 03:18:47,500 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-28 03:18:47,500 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 249 transitions, 2422 flow [2024-06-28 03:18:47,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:47,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:47,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:47,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 03:18:47,501 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:47,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:47,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1604580992, now seen corresponding path program 1 times [2024-06-28 03:18:47,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:47,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923520239] [2024-06-28 03:18:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:47,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:48,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:48,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923520239] [2024-06-28 03:18:48,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923520239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:48,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:48,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:18:48,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802886459] [2024-06-28 03:18:48,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:48,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:18:48,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:48,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:18:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:18:48,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:48,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 249 transitions, 2422 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:48,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:48,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:48,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:50,046 INFO L124 PetriNetUnfolderBase]: 3427/5490 cut-off events. [2024-06-28 03:18:50,046 INFO L125 PetriNetUnfolderBase]: For 784754/784754 co-relation queries the response was YES. [2024-06-28 03:18:50,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48355 conditions, 5490 events. 3427/5490 cut-off events. For 784754/784754 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33068 event pairs, 880 based on Foata normal form. 4/5493 useless extension candidates. Maximal degree in co-relation 48249. Up to 4752 conditions per place. [2024-06-28 03:18:50,114 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 198 selfloop transitions, 74 changer transitions 0/289 dead transitions. [2024-06-28 03:18:50,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 289 transitions, 3138 flow [2024-06-28 03:18:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:18:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:18:50,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-28 03:18:50,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-28 03:18:50,116 INFO L175 Difference]: Start difference. First operand has 219 places, 249 transitions, 2422 flow. Second operand 10 states and 206 transitions. [2024-06-28 03:18:50,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 289 transitions, 3138 flow [2024-06-28 03:18:51,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 289 transitions, 3046 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-28 03:18:51,060 INFO L231 Difference]: Finished difference. Result has 225 places, 254 transitions, 2575 flow [2024-06-28 03:18:51,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2575, PETRI_PLACES=225, PETRI_TRANSITIONS=254} [2024-06-28 03:18:51,060 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-28 03:18:51,060 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 254 transitions, 2575 flow [2024-06-28 03:18:51,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:51,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:51,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:51,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 03:18:51,061 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:51,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:51,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1574254046, now seen corresponding path program 2 times [2024-06-28 03:18:51,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:51,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757031066] [2024-06-28 03:18:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:51,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:52,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:52,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757031066] [2024-06-28 03:18:52,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757031066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:52,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:52,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:18:52,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388426865] [2024-06-28 03:18:52,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:52,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:18:52,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:52,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:18:52,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:18:52,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:52,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 254 transitions, 2575 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:52,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:52,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:52,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:53,596 INFO L124 PetriNetUnfolderBase]: 3444/5513 cut-off events. [2024-06-28 03:18:53,596 INFO L125 PetriNetUnfolderBase]: For 809414/809414 co-relation queries the response was YES. [2024-06-28 03:18:53,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49622 conditions, 5513 events. 3444/5513 cut-off events. For 809414/809414 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33190 event pairs, 879 based on Foata normal form. 4/5516 useless extension candidates. Maximal degree in co-relation 49514. Up to 4779 conditions per place. [2024-06-28 03:18:53,657 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 200 selfloop transitions, 77 changer transitions 0/294 dead transitions. [2024-06-28 03:18:53,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 294 transitions, 3317 flow [2024-06-28 03:18:53,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:18:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:18:53,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-28 03:18:53,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-28 03:18:53,658 INFO L175 Difference]: Start difference. First operand has 225 places, 254 transitions, 2575 flow. Second operand 10 states and 206 transitions. [2024-06-28 03:18:53,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 294 transitions, 3317 flow [2024-06-28 03:18:54,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 294 transitions, 3112 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 03:18:54,370 INFO L231 Difference]: Finished difference. Result has 229 places, 259 transitions, 2631 flow [2024-06-28 03:18:54,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2631, PETRI_PLACES=229, PETRI_TRANSITIONS=259} [2024-06-28 03:18:54,370 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-28 03:18:54,370 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 259 transitions, 2631 flow [2024-06-28 03:18:54,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:54,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:54,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:54,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 03:18:54,371 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:54,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:54,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1220935134, now seen corresponding path program 3 times [2024-06-28 03:18:54,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:54,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524882999] [2024-06-28 03:18:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:54,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:55,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:55,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524882999] [2024-06-28 03:18:55,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524882999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:55,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:55,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:18:55,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572449189] [2024-06-28 03:18:55,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:55,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:18:55,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:55,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:18:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:18:55,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:55,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 259 transitions, 2631 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:55,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:55,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:55,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:18:57,174 INFO L124 PetriNetUnfolderBase]: 3472/5564 cut-off events. [2024-06-28 03:18:57,174 INFO L125 PetriNetUnfolderBase]: For 832665/832665 co-relation queries the response was YES. [2024-06-28 03:18:57,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50593 conditions, 5564 events. 3472/5564 cut-off events. For 832665/832665 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 33584 event pairs, 879 based on Foata normal form. 4/5567 useless extension candidates. Maximal degree in co-relation 50483. Up to 4813 conditions per place. [2024-06-28 03:18:57,239 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 197 selfloop transitions, 89 changer transitions 0/303 dead transitions. [2024-06-28 03:18:57,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 303 transitions, 3445 flow [2024-06-28 03:18:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:18:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:18:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-28 03:18:57,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-28 03:18:57,240 INFO L175 Difference]: Start difference. First operand has 229 places, 259 transitions, 2631 flow. Second operand 10 states and 206 transitions. [2024-06-28 03:18:57,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 303 transitions, 3445 flow [2024-06-28 03:18:58,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 303 transitions, 3216 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-28 03:18:58,143 INFO L231 Difference]: Finished difference. Result has 233 places, 270 transitions, 2765 flow [2024-06-28 03:18:58,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2765, PETRI_PLACES=233, PETRI_TRANSITIONS=270} [2024-06-28 03:18:58,144 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 188 predicate places. [2024-06-28 03:18:58,144 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 270 transitions, 2765 flow [2024-06-28 03:18:58,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:58,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:18:58,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:18:58,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 03:18:58,144 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:18:58,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:18:58,144 INFO L85 PathProgramCache]: Analyzing trace with hash 935835264, now seen corresponding path program 4 times [2024-06-28 03:18:58,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:18:58,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601821936] [2024-06-28 03:18:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:18:58,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:18:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:18:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:18:59,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:18:59,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601821936] [2024-06-28 03:18:59,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601821936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:18:59,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:18:59,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:18:59,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136857105] [2024-06-28 03:18:59,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:18:59,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:18:59,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:18:59,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:18:59,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:18:59,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:18:59,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 270 transitions, 2765 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:18:59,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:18:59,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:18:59,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:00,601 INFO L124 PetriNetUnfolderBase]: 3464/5546 cut-off events. [2024-06-28 03:19:00,601 INFO L125 PetriNetUnfolderBase]: For 845377/845377 co-relation queries the response was YES. [2024-06-28 03:19:00,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50837 conditions, 5546 events. 3464/5546 cut-off events. For 845377/845377 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33415 event pairs, 877 based on Foata normal form. 4/5549 useless extension candidates. Maximal degree in co-relation 50725. Up to 4801 conditions per place. [2024-06-28 03:19:00,665 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 202 selfloop transitions, 87 changer transitions 0/306 dead transitions. [2024-06-28 03:19:00,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 306 transitions, 3518 flow [2024-06-28 03:19:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:19:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:19:00,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-28 03:19:00,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-28 03:19:00,667 INFO L175 Difference]: Start difference. First operand has 233 places, 270 transitions, 2765 flow. Second operand 10 states and 206 transitions. [2024-06-28 03:19:00,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 306 transitions, 3518 flow [2024-06-28 03:19:01,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 306 transitions, 3309 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 03:19:01,505 INFO L231 Difference]: Finished difference. Result has 239 places, 273 transitions, 2842 flow [2024-06-28 03:19:01,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2842, PETRI_PLACES=239, PETRI_TRANSITIONS=273} [2024-06-28 03:19:01,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 194 predicate places. [2024-06-28 03:19:01,506 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 273 transitions, 2842 flow [2024-06-28 03:19:01,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:01,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:01,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:01,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 03:19:01,506 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:01,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:01,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1231410654, now seen corresponding path program 5 times [2024-06-28 03:19:01,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:01,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767414805] [2024-06-28 03:19:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:01,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:02,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:02,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767414805] [2024-06-28 03:19:02,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767414805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:02,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:02,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:19:02,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350745340] [2024-06-28 03:19:02,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:02,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:19:02,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:02,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:19:02,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:19:02,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:19:02,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 273 transitions, 2842 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:02,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:02,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:19:02,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:04,140 INFO L124 PetriNetUnfolderBase]: 3497/5621 cut-off events. [2024-06-28 03:19:04,140 INFO L125 PetriNetUnfolderBase]: For 854858/854858 co-relation queries the response was YES. [2024-06-28 03:19:04,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50234 conditions, 5621 events. 3497/5621 cut-off events. For 854858/854858 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34192 event pairs, 782 based on Foata normal form. 4/5624 useless extension candidates. Maximal degree in co-relation 50120. Up to 4655 conditions per place. [2024-06-28 03:19:04,207 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 195 selfloop transitions, 101 changer transitions 0/313 dead transitions. [2024-06-28 03:19:04,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 313 transitions, 3620 flow [2024-06-28 03:19:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:19:04,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:19:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-28 03:19:04,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-28 03:19:04,208 INFO L175 Difference]: Start difference. First operand has 239 places, 273 transitions, 2842 flow. Second operand 10 states and 210 transitions. [2024-06-28 03:19:04,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 313 transitions, 3620 flow [2024-06-28 03:19:05,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 313 transitions, 3377 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-28 03:19:05,246 INFO L231 Difference]: Finished difference. Result has 243 places, 276 transitions, 2909 flow [2024-06-28 03:19:05,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2599, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2909, PETRI_PLACES=243, PETRI_TRANSITIONS=276} [2024-06-28 03:19:05,247 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-28 03:19:05,247 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 276 transitions, 2909 flow [2024-06-28 03:19:05,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:05,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:05,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:05,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:19:05,248 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:05,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:05,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1141876271, now seen corresponding path program 5 times [2024-06-28 03:19:05,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:05,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758857648] [2024-06-28 03:19:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:05,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:06,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:06,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758857648] [2024-06-28 03:19:06,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758857648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:06,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:06,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:19:06,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576673557] [2024-06-28 03:19:06,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:06,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:19:06,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:06,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:19:06,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:19:06,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:19:06,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 276 transitions, 2909 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:06,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:06,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:19:06,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:07,103 INFO L124 PetriNetUnfolderBase]: 3331/5451 cut-off events. [2024-06-28 03:19:07,103 INFO L125 PetriNetUnfolderBase]: For 869094/869096 co-relation queries the response was YES. [2024-06-28 03:19:07,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49739 conditions, 5451 events. 3331/5451 cut-off events. For 869094/869096 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34006 event pairs, 847 based on Foata normal form. 4/5406 useless extension candidates. Maximal degree in co-relation 49623. Up to 4810 conditions per place. [2024-06-28 03:19:07,174 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 204 selfloop transitions, 51 changer transitions 0/290 dead transitions. [2024-06-28 03:19:07,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 290 transitions, 3661 flow [2024-06-28 03:19:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:19:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:19:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-28 03:19:07,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-28 03:19:07,175 INFO L175 Difference]: Start difference. First operand has 243 places, 276 transitions, 2909 flow. Second operand 7 states and 144 transitions. [2024-06-28 03:19:07,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 290 transitions, 3661 flow [2024-06-28 03:19:08,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 290 transitions, 3423 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-28 03:19:08,157 INFO L231 Difference]: Finished difference. Result has 243 places, 279 transitions, 2837 flow [2024-06-28 03:19:08,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2837, PETRI_PLACES=243, PETRI_TRANSITIONS=279} [2024-06-28 03:19:08,158 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-28 03:19:08,158 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 279 transitions, 2837 flow [2024-06-28 03:19:08,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:08,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:08,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:08,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 03:19:08,158 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:08,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:08,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1142026001, now seen corresponding path program 6 times [2024-06-28 03:19:08,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:08,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380075266] [2024-06-28 03:19:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:08,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:08,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:08,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380075266] [2024-06-28 03:19:08,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380075266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:08,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:08,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:19:08,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208780498] [2024-06-28 03:19:08,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:08,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:19:08,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:19:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:19:09,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:19:09,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 279 transitions, 2837 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:09,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:09,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:19:09,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:09,924 INFO L124 PetriNetUnfolderBase]: 3326/5435 cut-off events. [2024-06-28 03:19:09,924 INFO L125 PetriNetUnfolderBase]: For 882726/882728 co-relation queries the response was YES. [2024-06-28 03:19:10,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49326 conditions, 5435 events. 3326/5435 cut-off events. For 882726/882728 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33755 event pairs, 837 based on Foata normal form. 3/5389 useless extension candidates. Maximal degree in co-relation 49209. Up to 4805 conditions per place. [2024-06-28 03:19:10,094 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 199 selfloop transitions, 55 changer transitions 0/289 dead transitions. [2024-06-28 03:19:10,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 289 transitions, 3369 flow [2024-06-28 03:19:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:19:10,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:19:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-28 03:19:10,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-28 03:19:10,096 INFO L175 Difference]: Start difference. First operand has 243 places, 279 transitions, 2837 flow. Second operand 7 states and 142 transitions. [2024-06-28 03:19:10,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 289 transitions, 3369 flow [2024-06-28 03:19:10,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 289 transitions, 3219 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-28 03:19:10,973 INFO L231 Difference]: Finished difference. Result has 246 places, 279 transitions, 2803 flow [2024-06-28 03:19:10,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2687, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2803, PETRI_PLACES=246, PETRI_TRANSITIONS=279} [2024-06-28 03:19:10,973 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-28 03:19:10,973 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 279 transitions, 2803 flow [2024-06-28 03:19:10,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:10,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:10,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:10,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 03:19:10,974 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:10,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:10,974 INFO L85 PathProgramCache]: Analyzing trace with hash 918653896, now seen corresponding path program 4 times [2024-06-28 03:19:10,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:10,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15530717] [2024-06-28 03:19:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:10,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:11,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:11,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15530717] [2024-06-28 03:19:11,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15530717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:11,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:11,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:19:11,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156247337] [2024-06-28 03:19:11,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:11,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:19:11,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:11,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:19:11,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:19:12,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:19:12,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 279 transitions, 2803 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:12,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:12,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:19:12,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:13,066 INFO L124 PetriNetUnfolderBase]: 3442/5572 cut-off events. [2024-06-28 03:19:13,066 INFO L125 PetriNetUnfolderBase]: For 912699/912701 co-relation queries the response was YES. [2024-06-28 03:19:13,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50601 conditions, 5572 events. 3442/5572 cut-off events. For 912699/912701 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34336 event pairs, 868 based on Foata normal form. 4/5527 useless extension candidates. Maximal degree in co-relation 50483. Up to 4948 conditions per place. [2024-06-28 03:19:13,125 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 207 selfloop transitions, 77 changer transitions 0/307 dead transitions. [2024-06-28 03:19:13,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 307 transitions, 4259 flow [2024-06-28 03:19:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:19:13,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-28 03:19:13,126 INFO L175 Difference]: Start difference. First operand has 246 places, 279 transitions, 2803 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:19:13,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 307 transitions, 4259 flow [2024-06-28 03:19:13,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 307 transitions, 4111 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-28 03:19:13,830 INFO L231 Difference]: Finished difference. Result has 248 places, 290 transitions, 3083 flow [2024-06-28 03:19:13,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3083, PETRI_PLACES=248, PETRI_TRANSITIONS=290} [2024-06-28 03:19:13,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-28 03:19:13,830 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 290 transitions, 3083 flow [2024-06-28 03:19:13,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:13,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:13,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:13,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 03:19:13,831 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:13,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:13,831 INFO L85 PathProgramCache]: Analyzing trace with hash 918654361, now seen corresponding path program 2 times [2024-06-28 03:19:13,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:13,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663655420] [2024-06-28 03:19:13,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:13,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:14,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:14,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663655420] [2024-06-28 03:19:14,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663655420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:14,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:14,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:19:14,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241753865] [2024-06-28 03:19:14,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:14,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:19:14,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:14,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:19:14,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:19:15,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:19:15,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 290 transitions, 3083 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:15,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:15,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:19:15,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:16,082 INFO L124 PetriNetUnfolderBase]: 3447/5578 cut-off events. [2024-06-28 03:19:16,082 INFO L125 PetriNetUnfolderBase]: For 937665/937667 co-relation queries the response was YES. [2024-06-28 03:19:16,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51691 conditions, 5578 events. 3447/5578 cut-off events. For 937665/937667 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 34190 event pairs, 837 based on Foata normal form. 3/5533 useless extension candidates. Maximal degree in co-relation 51571. Up to 5170 conditions per place. [2024-06-28 03:19:16,152 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 253 selfloop transitions, 37 changer transitions 0/313 dead transitions. [2024-06-28 03:19:16,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 313 transitions, 4053 flow [2024-06-28 03:19:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:19:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:19:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:19:16,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116161616161616 [2024-06-28 03:19:16,153 INFO L175 Difference]: Start difference. First operand has 248 places, 290 transitions, 3083 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:19:16,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 313 transitions, 4053 flow [2024-06-28 03:19:17,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 313 transitions, 3819 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-28 03:19:17,119 INFO L231 Difference]: Finished difference. Result has 255 places, 301 transitions, 3149 flow [2024-06-28 03:19:17,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3149, PETRI_PLACES=255, PETRI_TRANSITIONS=301} [2024-06-28 03:19:17,119 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 210 predicate places. [2024-06-28 03:19:17,120 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 301 transitions, 3149 flow [2024-06-28 03:19:17,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:17,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:17,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:17,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 03:19:17,120 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:17,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:17,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1923443256, now seen corresponding path program 5 times [2024-06-28 03:19:17,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:17,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619196917] [2024-06-28 03:19:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:17,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:18,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:18,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619196917] [2024-06-28 03:19:18,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619196917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:18,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:18,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:18,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905111326] [2024-06-28 03:19:18,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:18,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:18,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:18,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:18,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:18,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:19:18,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 301 transitions, 3149 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:18,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:18,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:19:18,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:19,239 INFO L124 PetriNetUnfolderBase]: 3457/5593 cut-off events. [2024-06-28 03:19:19,240 INFO L125 PetriNetUnfolderBase]: For 959276/959278 co-relation queries the response was YES. [2024-06-28 03:19:19,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51639 conditions, 5593 events. 3457/5593 cut-off events. For 959276/959278 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 34305 event pairs, 866 based on Foata normal form. 4/5549 useless extension candidates. Maximal degree in co-relation 51516. Up to 4968 conditions per place. [2024-06-28 03:19:19,299 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 213 selfloop transitions, 88 changer transitions 0/324 dead transitions. [2024-06-28 03:19:19,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 324 transitions, 4504 flow [2024-06-28 03:19:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:19:19,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-28 03:19:19,300 INFO L175 Difference]: Start difference. First operand has 255 places, 301 transitions, 3149 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:19:19,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 324 transitions, 4504 flow [2024-06-28 03:19:20,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 324 transitions, 4412 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-28 03:19:20,094 INFO L231 Difference]: Finished difference. Result has 262 places, 310 transitions, 3484 flow [2024-06-28 03:19:20,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3057, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3484, PETRI_PLACES=262, PETRI_TRANSITIONS=310} [2024-06-28 03:19:20,095 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-28 03:19:20,095 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 310 transitions, 3484 flow [2024-06-28 03:19:20,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:20,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:20,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:20,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 03:19:20,095 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:20,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:20,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1938188406, now seen corresponding path program 6 times [2024-06-28 03:19:20,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:20,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933192741] [2024-06-28 03:19:20,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:20,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:20,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:20,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933192741] [2024-06-28 03:19:20,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933192741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:20,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:20,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:20,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834837125] [2024-06-28 03:19:20,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:20,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:20,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:20,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:20,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:21,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:19:21,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 310 transitions, 3484 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:21,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:21,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:19:21,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:22,122 INFO L124 PetriNetUnfolderBase]: 3453/5589 cut-off events. [2024-06-28 03:19:22,122 INFO L125 PetriNetUnfolderBase]: For 976262/976264 co-relation queries the response was YES. [2024-06-28 03:19:22,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52157 conditions, 5589 events. 3453/5589 cut-off events. For 976262/976264 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 34295 event pairs, 866 based on Foata normal form. 4/5545 useless extension candidates. Maximal degree in co-relation 52030. Up to 4966 conditions per place. [2024-06-28 03:19:22,198 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 211 selfloop transitions, 89 changer transitions 0/323 dead transitions. [2024-06-28 03:19:22,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 323 transitions, 4460 flow [2024-06-28 03:19:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 03:19:22,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-28 03:19:22,199 INFO L175 Difference]: Start difference. First operand has 262 places, 310 transitions, 3484 flow. Second operand 8 states and 157 transitions. [2024-06-28 03:19:22,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 323 transitions, 4460 flow [2024-06-28 03:19:23,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 323 transitions, 4267 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-28 03:19:23,289 INFO L231 Difference]: Finished difference. Result has 267 places, 310 transitions, 3477 flow [2024-06-28 03:19:23,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3291, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3477, PETRI_PLACES=267, PETRI_TRANSITIONS=310} [2024-06-28 03:19:23,289 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-28 03:19:23,289 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 310 transitions, 3477 flow [2024-06-28 03:19:23,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:23,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:23,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:23,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 03:19:23,290 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:23,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:23,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1156618321, now seen corresponding path program 3 times [2024-06-28 03:19:23,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:23,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271500697] [2024-06-28 03:19:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:23,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:24,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:24,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271500697] [2024-06-28 03:19:24,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271500697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:24,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:24,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:24,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545058722] [2024-06-28 03:19:24,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:24,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:24,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:24,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:24,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:24,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:19:24,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 310 transitions, 3477 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:24,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:24,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:19:24,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:25,318 INFO L124 PetriNetUnfolderBase]: 3458/5595 cut-off events. [2024-06-28 03:19:25,318 INFO L125 PetriNetUnfolderBase]: For 995336/995338 co-relation queries the response was YES. [2024-06-28 03:19:25,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52611 conditions, 5595 events. 3458/5595 cut-off events. For 995336/995338 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 34284 event pairs, 842 based on Foata normal form. 3/5550 useless extension candidates. Maximal degree in co-relation 52482. Up to 5185 conditions per place. [2024-06-28 03:19:25,398 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 261 selfloop transitions, 40 changer transitions 0/324 dead transitions. [2024-06-28 03:19:25,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 324 transitions, 4361 flow [2024-06-28 03:19:25,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:25,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:19:25,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-28 03:19:25,399 INFO L175 Difference]: Start difference. First operand has 267 places, 310 transitions, 3477 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:19:25,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 324 transitions, 4361 flow [2024-06-28 03:19:26,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 324 transitions, 4139 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 03:19:26,574 INFO L231 Difference]: Finished difference. Result has 268 places, 313 transitions, 3423 flow [2024-06-28 03:19:26,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3255, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3423, PETRI_PLACES=268, PETRI_TRANSITIONS=313} [2024-06-28 03:19:26,574 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-28 03:19:26,574 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 313 transitions, 3423 flow [2024-06-28 03:19:26,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:26,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:26,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:26,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 03:19:26,575 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:26,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:26,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1938203751, now seen corresponding path program 4 times [2024-06-28 03:19:26,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:26,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462732093] [2024-06-28 03:19:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:26,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:27,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:27,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462732093] [2024-06-28 03:19:27,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462732093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:27,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:27,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:27,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467503215] [2024-06-28 03:19:27,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:27,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:27,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:27,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:27,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:27,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:19:27,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 313 transitions, 3423 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:27,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:27,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:19:27,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:28,601 INFO L124 PetriNetUnfolderBase]: 3455/5591 cut-off events. [2024-06-28 03:19:28,601 INFO L125 PetriNetUnfolderBase]: For 1012540/1012542 co-relation queries the response was YES. [2024-06-28 03:19:28,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52480 conditions, 5591 events. 3455/5591 cut-off events. For 1012540/1012542 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 34243 event pairs, 842 based on Foata normal form. 3/5546 useless extension candidates. Maximal degree in co-relation 52350. Up to 5182 conditions per place. [2024-06-28 03:19:28,675 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 258 selfloop transitions, 42 changer transitions 0/323 dead transitions. [2024-06-28 03:19:28,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 323 transitions, 4047 flow [2024-06-28 03:19:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:28,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 03:19:28,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-28 03:19:28,676 INFO L175 Difference]: Start difference. First operand has 268 places, 313 transitions, 3423 flow. Second operand 8 states and 147 transitions. [2024-06-28 03:19:28,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 323 transitions, 4047 flow [2024-06-28 03:19:29,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 323 transitions, 3847 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-28 03:19:29,650 INFO L231 Difference]: Finished difference. Result has 271 places, 313 transitions, 3313 flow [2024-06-28 03:19:29,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3313, PETRI_PLACES=271, PETRI_TRANSITIONS=313} [2024-06-28 03:19:29,650 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2024-06-28 03:19:29,650 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 313 transitions, 3313 flow [2024-06-28 03:19:29,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:29,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:29,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:29,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 03:19:29,651 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:29,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:29,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1884584657, now seen corresponding path program 1 times [2024-06-28 03:19:29,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:29,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117259767] [2024-06-28 03:19:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:29,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:30,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:30,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117259767] [2024-06-28 03:19:30,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117259767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:30,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:30,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:30,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133158206] [2024-06-28 03:19:30,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:30,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:30,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:30,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:19:30,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 313 transitions, 3313 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:30,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:30,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:19:30,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:31,643 INFO L124 PetriNetUnfolderBase]: 3427/5607 cut-off events. [2024-06-28 03:19:31,643 INFO L125 PetriNetUnfolderBase]: For 1042573/1042573 co-relation queries the response was YES. [2024-06-28 03:19:31,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52488 conditions, 5607 events. 3427/5607 cut-off events. For 1042573/1042573 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34654 event pairs, 805 based on Foata normal form. 2/5609 useless extension candidates. Maximal degree in co-relation 52357. Up to 5084 conditions per place. [2024-06-28 03:19:31,720 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 292 selfloop transitions, 17 changer transitions 0/337 dead transitions. [2024-06-28 03:19:31,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 337 transitions, 4046 flow [2024-06-28 03:19:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:31,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 03:19:31,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-28 03:19:31,721 INFO L175 Difference]: Start difference. First operand has 271 places, 313 transitions, 3313 flow. Second operand 8 states and 160 transitions. [2024-06-28 03:19:31,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 337 transitions, 4046 flow [2024-06-28 03:19:32,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 337 transitions, 3952 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 03:19:32,683 INFO L231 Difference]: Finished difference. Result has 272 places, 316 transitions, 3323 flow [2024-06-28 03:19:32,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3323, PETRI_PLACES=272, PETRI_TRANSITIONS=316} [2024-06-28 03:19:32,683 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 227 predicate places. [2024-06-28 03:19:32,683 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 316 transitions, 3323 flow [2024-06-28 03:19:32,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:32,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:32,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:32,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 03:19:32,684 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:32,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:32,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1884434710, now seen corresponding path program 1 times [2024-06-28 03:19:32,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:32,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169378563] [2024-06-28 03:19:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:32,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:33,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:33,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169378563] [2024-06-28 03:19:33,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169378563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:33,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:33,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:33,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803210795] [2024-06-28 03:19:33,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:33,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:33,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:33,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:33,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:33,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:19:33,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 316 transitions, 3323 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:33,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:33,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:19:33,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:34,839 INFO L124 PetriNetUnfolderBase]: 3523/5705 cut-off events. [2024-06-28 03:19:34,839 INFO L125 PetriNetUnfolderBase]: For 1055050/1055050 co-relation queries the response was YES. [2024-06-28 03:19:34,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53489 conditions, 5705 events. 3523/5705 cut-off events. For 1055050/1055050 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 34848 event pairs, 836 based on Foata normal form. 1/5706 useless extension candidates. Maximal degree in co-relation 53358. Up to 5337 conditions per place. [2024-06-28 03:19:34,924 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 308 selfloop transitions, 17 changer transitions 0/336 dead transitions. [2024-06-28 03:19:34,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 336 transitions, 4080 flow [2024-06-28 03:19:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:34,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:19:34,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-28 03:19:34,925 INFO L175 Difference]: Start difference. First operand has 272 places, 316 transitions, 3323 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:19:34,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 336 transitions, 4080 flow [2024-06-28 03:19:36,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 336 transitions, 3998 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 03:19:36,081 INFO L231 Difference]: Finished difference. Result has 274 places, 319 transitions, 3349 flow [2024-06-28 03:19:36,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3241, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3349, PETRI_PLACES=274, PETRI_TRANSITIONS=319} [2024-06-28 03:19:36,081 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-28 03:19:36,081 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 319 transitions, 3349 flow [2024-06-28 03:19:36,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:36,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:36,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:36,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 03:19:36,082 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:36,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:36,082 INFO L85 PathProgramCache]: Analyzing trace with hash 890895807, now seen corresponding path program 2 times [2024-06-28 03:19:36,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:36,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510089585] [2024-06-28 03:19:36,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:36,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:36,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:36,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510089585] [2024-06-28 03:19:36,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510089585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:36,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:36,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:36,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826869858] [2024-06-28 03:19:36,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:36,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:36,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:36,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:36,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:36,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:19:36,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 319 transitions, 3349 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:36,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:36,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:19:36,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:38,168 INFO L124 PetriNetUnfolderBase]: 3452/5640 cut-off events. [2024-06-28 03:19:38,168 INFO L125 PetriNetUnfolderBase]: For 1085166/1085166 co-relation queries the response was YES. [2024-06-28 03:19:38,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53724 conditions, 5640 events. 3452/5640 cut-off events. For 1085166/1085166 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34795 event pairs, 804 based on Foata normal form. 2/5642 useless extension candidates. Maximal degree in co-relation 53592. Up to 5104 conditions per place. [2024-06-28 03:19:38,244 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 290 selfloop transitions, 22 changer transitions 0/341 dead transitions. [2024-06-28 03:19:38,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 341 transitions, 4092 flow [2024-06-28 03:19:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:38,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:38,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 03:19:38,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-28 03:19:38,245 INFO L175 Difference]: Start difference. First operand has 274 places, 319 transitions, 3349 flow. Second operand 8 states and 160 transitions. [2024-06-28 03:19:38,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 341 transitions, 4092 flow [2024-06-28 03:19:39,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 341 transitions, 4006 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 03:19:39,523 INFO L231 Difference]: Finished difference. Result has 276 places, 322 transitions, 3385 flow [2024-06-28 03:19:39,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3263, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3385, PETRI_PLACES=276, PETRI_TRANSITIONS=322} [2024-06-28 03:19:39,524 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-28 03:19:39,524 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 322 transitions, 3385 flow [2024-06-28 03:19:39,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:39,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:39,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:39,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 03:19:39,524 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:39,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:39,525 INFO L85 PathProgramCache]: Analyzing trace with hash 891097834, now seen corresponding path program 2 times [2024-06-28 03:19:39,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:39,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398570745] [2024-06-28 03:19:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:39,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:40,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:40,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398570745] [2024-06-28 03:19:40,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398570745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:40,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:40,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:40,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552726652] [2024-06-28 03:19:40,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:40,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:40,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:40,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:40,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:19:40,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 322 transitions, 3385 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:40,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:40,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:19:40,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:41,620 INFO L124 PetriNetUnfolderBase]: 3546/5739 cut-off events. [2024-06-28 03:19:41,621 INFO L125 PetriNetUnfolderBase]: For 1105159/1105159 co-relation queries the response was YES. [2024-06-28 03:19:41,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55030 conditions, 5739 events. 3546/5739 cut-off events. For 1105159/1105159 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 35028 event pairs, 836 based on Foata normal form. 1/5740 useless extension candidates. Maximal degree in co-relation 54897. Up to 5353 conditions per place. [2024-06-28 03:19:41,687 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 303 selfloop transitions, 29 changer transitions 0/343 dead transitions. [2024-06-28 03:19:41,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 343 transitions, 4412 flow [2024-06-28 03:19:41,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:19:41,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-28 03:19:41,688 INFO L175 Difference]: Start difference. First operand has 276 places, 322 transitions, 3385 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:19:41,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 343 transitions, 4412 flow [2024-06-28 03:19:42,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 343 transitions, 4312 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-28 03:19:42,904 INFO L231 Difference]: Finished difference. Result has 278 places, 328 transitions, 3495 flow [2024-06-28 03:19:42,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3285, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3495, PETRI_PLACES=278, PETRI_TRANSITIONS=328} [2024-06-28 03:19:42,905 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-28 03:19:42,905 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 328 transitions, 3495 flow [2024-06-28 03:19:42,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:42,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:42,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:42,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 03:19:42,905 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:42,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:42,906 INFO L85 PathProgramCache]: Analyzing trace with hash 891097617, now seen corresponding path program 3 times [2024-06-28 03:19:42,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:42,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513254498] [2024-06-28 03:19:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:42,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:43,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:43,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513254498] [2024-06-28 03:19:43,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513254498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:43,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:43,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:43,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833528612] [2024-06-28 03:19:43,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:43,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:43,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:43,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:43,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:43,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:19:43,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 328 transitions, 3495 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:43,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:43,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:19:43,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:45,034 INFO L124 PetriNetUnfolderBase]: 3475/5674 cut-off events. [2024-06-28 03:19:45,035 INFO L125 PetriNetUnfolderBase]: For 1138145/1138145 co-relation queries the response was YES. [2024-06-28 03:19:45,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55264 conditions, 5674 events. 3475/5674 cut-off events. For 1138145/1138145 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 35014 event pairs, 804 based on Foata normal form. 2/5676 useless extension candidates. Maximal degree in co-relation 55130. Up to 5119 conditions per place. [2024-06-28 03:19:45,102 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 287 selfloop transitions, 29 changer transitions 0/347 dead transitions. [2024-06-28 03:19:45,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 347 transitions, 4246 flow [2024-06-28 03:19:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:19:45,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-28 03:19:45,103 INFO L175 Difference]: Start difference. First operand has 278 places, 328 transitions, 3495 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:19:45,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 347 transitions, 4246 flow [2024-06-28 03:19:46,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 347 transitions, 4146 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-28 03:19:46,347 INFO L231 Difference]: Finished difference. Result has 282 places, 331 transitions, 3539 flow [2024-06-28 03:19:46,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3539, PETRI_PLACES=282, PETRI_TRANSITIONS=331} [2024-06-28 03:19:46,347 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-28 03:19:46,347 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 331 transitions, 3539 flow [2024-06-28 03:19:46,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:46,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:46,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:46,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 03:19:46,348 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:46,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:46,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1878862801, now seen corresponding path program 1 times [2024-06-28 03:19:46,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:46,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791948072] [2024-06-28 03:19:46,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:46,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:47,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:47,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791948072] [2024-06-28 03:19:47,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791948072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:47,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:47,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:47,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983104223] [2024-06-28 03:19:47,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:47,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:47,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:47,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:47,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:47,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:19:47,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 331 transitions, 3539 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:47,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:47,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:19:47,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:48,485 INFO L124 PetriNetUnfolderBase]: 3400/5563 cut-off events. [2024-06-28 03:19:48,485 INFO L125 PetriNetUnfolderBase]: For 1157609/1157609 co-relation queries the response was YES. [2024-06-28 03:19:48,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55484 conditions, 5563 events. 3400/5563 cut-off events. For 1157609/1157609 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34600 event pairs, 800 based on Foata normal form. 2/5517 useless extension candidates. Maximal degree in co-relation 55348. Up to 5055 conditions per place. [2024-06-28 03:19:48,559 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 299 selfloop transitions, 17 changer transitions 0/348 dead transitions. [2024-06-28 03:19:48,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 348 transitions, 4276 flow [2024-06-28 03:19:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 03:19:48,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-28 03:19:48,560 INFO L175 Difference]: Start difference. First operand has 282 places, 331 transitions, 3539 flow. Second operand 8 states and 153 transitions. [2024-06-28 03:19:48,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 348 transitions, 4276 flow [2024-06-28 03:19:50,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 348 transitions, 4154 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 03:19:50,147 INFO L231 Difference]: Finished difference. Result has 284 places, 334 transitions, 3531 flow [2024-06-28 03:19:50,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3417, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3531, PETRI_PLACES=284, PETRI_TRANSITIONS=334} [2024-06-28 03:19:50,147 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-28 03:19:50,147 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 334 transitions, 3531 flow [2024-06-28 03:19:50,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:50,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:50,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:50,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 03:19:50,148 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:50,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1878863080, now seen corresponding path program 3 times [2024-06-28 03:19:50,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:50,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873001900] [2024-06-28 03:19:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:50,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:51,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:51,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873001900] [2024-06-28 03:19:51,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873001900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:51,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:51,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:51,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298884936] [2024-06-28 03:19:51,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:51,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:51,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:51,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:51,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:51,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:19:51,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 334 transitions, 3531 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:51,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:51,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:19:51,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:52,245 INFO L124 PetriNetUnfolderBase]: 3558/5760 cut-off events. [2024-06-28 03:19:52,245 INFO L125 PetriNetUnfolderBase]: For 1170028/1170028 co-relation queries the response was YES. [2024-06-28 03:19:52,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56658 conditions, 5760 events. 3558/5760 cut-off events. For 1170028/1170028 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 35183 event pairs, 835 based on Foata normal form. 1/5761 useless extension candidates. Maximal degree in co-relation 56521. Up to 5371 conditions per place. [2024-06-28 03:19:52,323 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 307 selfloop transitions, 30 changer transitions 0/348 dead transitions. [2024-06-28 03:19:52,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 348 transitions, 4242 flow [2024-06-28 03:19:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:19:52,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-28 03:19:52,324 INFO L175 Difference]: Start difference. First operand has 284 places, 334 transitions, 3531 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:19:52,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 348 transitions, 4242 flow [2024-06-28 03:19:53,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 348 transitions, 4102 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-28 03:19:53,914 INFO L231 Difference]: Finished difference. Result has 286 places, 334 transitions, 3457 flow [2024-06-28 03:19:53,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3457, PETRI_PLACES=286, PETRI_TRANSITIONS=334} [2024-06-28 03:19:53,915 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-28 03:19:53,915 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 334 transitions, 3457 flow [2024-06-28 03:19:53,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:53,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:53,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:53,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 03:19:53,916 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:53,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:53,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1929176334, now seen corresponding path program 4 times [2024-06-28 03:19:53,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:53,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472436963] [2024-06-28 03:19:53,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:53,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:54,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:54,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472436963] [2024-06-28 03:19:54,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472436963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:54,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:54,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:54,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116112951] [2024-06-28 03:19:54,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:54,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:54,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:54,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:54,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:54,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:19:54,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 334 transitions, 3457 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:54,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:54,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:19:54,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:55,963 INFO L124 PetriNetUnfolderBase]: 3571/5780 cut-off events. [2024-06-28 03:19:55,963 INFO L125 PetriNetUnfolderBase]: For 1198433/1198435 co-relation queries the response was YES. [2024-06-28 03:19:56,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57152 conditions, 5780 events. 3571/5780 cut-off events. For 1198433/1198435 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 35313 event pairs, 843 based on Foata normal form. 3/5783 useless extension candidates. Maximal degree in co-relation 57014. Up to 5360 conditions per place. [2024-06-28 03:19:56,043 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 296 selfloop transitions, 49 changer transitions 0/356 dead transitions. [2024-06-28 03:19:56,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 356 transitions, 4804 flow [2024-06-28 03:19:56,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:56,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 03:19:56,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-28 03:19:56,044 INFO L175 Difference]: Start difference. First operand has 286 places, 334 transitions, 3457 flow. Second operand 8 states and 153 transitions. [2024-06-28 03:19:56,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 356 transitions, 4804 flow [2024-06-28 03:19:57,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 356 transitions, 4736 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 03:19:57,864 INFO L231 Difference]: Finished difference. Result has 287 places, 343 transitions, 3739 flow [2024-06-28 03:19:57,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3389, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3739, PETRI_PLACES=287, PETRI_TRANSITIONS=343} [2024-06-28 03:19:57,864 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-28 03:19:57,864 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 343 transitions, 3739 flow [2024-06-28 03:19:57,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:57,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:19:57,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:19:57,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 03:19:57,865 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:19:57,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:19:57,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1929176613, now seen corresponding path program 2 times [2024-06-28 03:19:57,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:19:57,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748509877] [2024-06-28 03:19:57,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:19:57,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:19:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:19:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:19:58,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:19:58,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748509877] [2024-06-28 03:19:58,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748509877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:19:58,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:19:58,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:19:58,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577946202] [2024-06-28 03:19:58,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:19:58,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:19:58,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:19:58,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:19:58,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:19:58,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:19:58,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 343 transitions, 3739 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:19:58,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:19:58,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:19:58,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:19:59,861 INFO L124 PetriNetUnfolderBase]: 3420/5592 cut-off events. [2024-06-28 03:19:59,862 INFO L125 PetriNetUnfolderBase]: For 1229277/1229279 co-relation queries the response was YES. [2024-06-28 03:19:59,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56926 conditions, 5592 events. 3420/5592 cut-off events. For 1229277/1229279 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34710 event pairs, 803 based on Foata normal form. 4/5548 useless extension candidates. Maximal degree in co-relation 56787. Up to 5046 conditions per place. [2024-06-28 03:19:59,939 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 289 selfloop transitions, 37 changer transitions 0/361 dead transitions. [2024-06-28 03:19:59,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 361 transitions, 4768 flow [2024-06-28 03:19:59,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:19:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:19:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 03:19:59,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-28 03:19:59,940 INFO L175 Difference]: Start difference. First operand has 287 places, 343 transitions, 3739 flow. Second operand 8 states and 157 transitions. [2024-06-28 03:19:59,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 361 transitions, 4768 flow [2024-06-28 03:20:01,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 361 transitions, 4604 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-28 03:20:01,668 INFO L231 Difference]: Finished difference. Result has 291 places, 349 transitions, 3813 flow [2024-06-28 03:20:01,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3813, PETRI_PLACES=291, PETRI_TRANSITIONS=349} [2024-06-28 03:20:01,668 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 246 predicate places. [2024-06-28 03:20:01,668 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 349 transitions, 3813 flow [2024-06-28 03:20:01,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:01,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:01,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:01,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 03:20:01,668 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:01,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:01,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1929168677, now seen corresponding path program 4 times [2024-06-28 03:20:01,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:01,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933917873] [2024-06-28 03:20:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:01,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:02,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:02,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933917873] [2024-06-28 03:20:02,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933917873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:02,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:02,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:02,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119499898] [2024-06-28 03:20:02,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:02,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:02,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:02,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:02,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:02,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:20:02,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 349 transitions, 3813 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:02,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:02,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:20:02,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:03,882 INFO L124 PetriNetUnfolderBase]: 3501/5717 cut-off events. [2024-06-28 03:20:03,882 INFO L125 PetriNetUnfolderBase]: For 1252627/1252629 co-relation queries the response was YES. [2024-06-28 03:20:03,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57628 conditions, 5717 events. 3501/5717 cut-off events. For 1252627/1252629 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 35315 event pairs, 814 based on Foata normal form. 2/5719 useless extension candidates. Maximal degree in co-relation 57488. Up to 5135 conditions per place. [2024-06-28 03:20:03,952 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 293 selfloop transitions, 38 changer transitions 0/365 dead transitions. [2024-06-28 03:20:03,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 365 transitions, 4596 flow [2024-06-28 03:20:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 03:20:03,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-28 03:20:03,953 INFO L175 Difference]: Start difference. First operand has 291 places, 349 transitions, 3813 flow. Second operand 8 states and 158 transitions. [2024-06-28 03:20:03,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 365 transitions, 4596 flow [2024-06-28 03:20:06,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 365 transitions, 4494 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-28 03:20:06,611 INFO L231 Difference]: Finished difference. Result has 295 places, 352 transitions, 3883 flow [2024-06-28 03:20:06,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3711, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3883, PETRI_PLACES=295, PETRI_TRANSITIONS=352} [2024-06-28 03:20:06,612 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 250 predicate places. [2024-06-28 03:20:06,612 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 352 transitions, 3883 flow [2024-06-28 03:20:06,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:06,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:06,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:06,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 03:20:06,612 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:06,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:06,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1147598344, now seen corresponding path program 5 times [2024-06-28 03:20:06,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:06,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662084375] [2024-06-28 03:20:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:06,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:07,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:07,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662084375] [2024-06-28 03:20:07,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662084375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:07,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:07,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:07,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968761295] [2024-06-28 03:20:07,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:07,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:07,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:07,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:07,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:07,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:20:07,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 352 transitions, 3883 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:07,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:07,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:20:07,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:08,717 INFO L124 PetriNetUnfolderBase]: 3575/5790 cut-off events. [2024-06-28 03:20:08,717 INFO L125 PetriNetUnfolderBase]: For 1263220/1263222 co-relation queries the response was YES. [2024-06-28 03:20:08,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58503 conditions, 5790 events. 3575/5790 cut-off events. For 1263220/1263222 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 35424 event pairs, 843 based on Foata normal form. 3/5793 useless extension candidates. Maximal degree in co-relation 58361. Up to 5367 conditions per place. [2024-06-28 03:20:08,794 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 303 selfloop transitions, 50 changer transitions 0/364 dead transitions. [2024-06-28 03:20:08,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 364 transitions, 4818 flow [2024-06-28 03:20:08,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:08,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:20:08,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-28 03:20:08,795 INFO L175 Difference]: Start difference. First operand has 295 places, 352 transitions, 3883 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:20:08,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 364 transitions, 4818 flow [2024-06-28 03:20:10,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 364 transitions, 4612 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-28 03:20:10,934 INFO L231 Difference]: Finished difference. Result has 297 places, 352 transitions, 3783 flow [2024-06-28 03:20:10,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3783, PETRI_PLACES=297, PETRI_TRANSITIONS=352} [2024-06-28 03:20:10,934 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-28 03:20:10,935 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 352 transitions, 3783 flow [2024-06-28 03:20:10,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:10,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:10,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:10,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 03:20:10,935 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:10,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:10,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1156802833, now seen corresponding path program 3 times [2024-06-28 03:20:10,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:10,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333470106] [2024-06-28 03:20:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:10,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:11,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:11,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333470106] [2024-06-28 03:20:11,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333470106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:11,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:11,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:11,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123595129] [2024-06-28 03:20:11,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:11,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:11,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:11,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:11,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:20:11,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 352 transitions, 3783 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:11,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:11,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:20:11,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:13,048 INFO L124 PetriNetUnfolderBase]: 3424/5602 cut-off events. [2024-06-28 03:20:13,048 INFO L125 PetriNetUnfolderBase]: For 1290563/1290565 co-relation queries the response was YES. [2024-06-28 03:20:13,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57798 conditions, 5602 events. 3424/5602 cut-off events. For 1290563/1290565 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 34794 event pairs, 803 based on Foata normal form. 4/5558 useless extension candidates. Maximal degree in co-relation 57655. Up to 5052 conditions per place. [2024-06-28 03:20:13,132 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 291 selfloop transitions, 41 changer transitions 0/367 dead transitions. [2024-06-28 03:20:13,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 367 transitions, 4754 flow [2024-06-28 03:20:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:20:13,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-28 03:20:13,135 INFO L175 Difference]: Start difference. First operand has 297 places, 352 transitions, 3783 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:20:13,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 367 transitions, 4754 flow [2024-06-28 03:20:15,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 367 transitions, 4650 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 03:20:15,377 INFO L231 Difference]: Finished difference. Result has 299 places, 355 transitions, 3843 flow [2024-06-28 03:20:15,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3843, PETRI_PLACES=299, PETRI_TRANSITIONS=355} [2024-06-28 03:20:15,377 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-28 03:20:15,377 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 355 transitions, 3843 flow [2024-06-28 03:20:15,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:15,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:15,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:15,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 03:20:15,378 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:15,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:15,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1938699813, now seen corresponding path program 4 times [2024-06-28 03:20:15,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:15,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71804131] [2024-06-28 03:20:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:15,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:16,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:16,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71804131] [2024-06-28 03:20:16,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71804131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:16,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:16,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:16,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619966175] [2024-06-28 03:20:16,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:16,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:16,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:16,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:16,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:16,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:20:16,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 355 transitions, 3843 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:16,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:16,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:20:16,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:17,422 INFO L124 PetriNetUnfolderBase]: 3418/5594 cut-off events. [2024-06-28 03:20:17,423 INFO L125 PetriNetUnfolderBase]: For 1304734/1304736 co-relation queries the response was YES. [2024-06-28 03:20:17,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57734 conditions, 5594 events. 3418/5594 cut-off events. For 1304734/1304736 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34787 event pairs, 803 based on Foata normal form. 4/5550 useless extension candidates. Maximal degree in co-relation 57590. Up to 5047 conditions per place. [2024-06-28 03:20:17,501 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 288 selfloop transitions, 43 changer transitions 0/366 dead transitions. [2024-06-28 03:20:17,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 366 transitions, 4534 flow [2024-06-28 03:20:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 03:20:17,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 03:20:17,502 INFO L175 Difference]: Start difference. First operand has 299 places, 355 transitions, 3843 flow. Second operand 8 states and 154 transitions. [2024-06-28 03:20:17,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 366 transitions, 4534 flow [2024-06-28 03:20:19,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 366 transitions, 4330 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-28 03:20:19,182 INFO L231 Difference]: Finished difference. Result has 301 places, 355 transitions, 3732 flow [2024-06-28 03:20:19,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3639, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3732, PETRI_PLACES=301, PETRI_TRANSITIONS=355} [2024-06-28 03:20:19,182 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-28 03:20:19,182 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 355 transitions, 3732 flow [2024-06-28 03:20:19,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:19,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:19,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:19,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 03:20:19,182 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:19,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:19,183 INFO L85 PathProgramCache]: Analyzing trace with hash 373870738, now seen corresponding path program 6 times [2024-06-28 03:20:19,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:19,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252562934] [2024-06-28 03:20:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:19,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:20,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:20,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252562934] [2024-06-28 03:20:20,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252562934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:20,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:20,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:20,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803959909] [2024-06-28 03:20:20,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:20,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:20,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:20,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:20,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:20:20,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 355 transitions, 3732 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:20,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:20,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:20:20,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:21,339 INFO L124 PetriNetUnfolderBase]: 3576/5792 cut-off events. [2024-06-28 03:20:21,339 INFO L125 PetriNetUnfolderBase]: For 1318410/1318412 co-relation queries the response was YES. [2024-06-28 03:20:21,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58610 conditions, 5792 events. 3576/5792 cut-off events. For 1318410/1318412 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 35376 event pairs, 842 based on Foata normal form. 3/5795 useless extension candidates. Maximal degree in co-relation 58465. Up to 5369 conditions per place. [2024-06-28 03:20:21,424 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 303 selfloop transitions, 52 changer transitions 0/366 dead transitions. [2024-06-28 03:20:21,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 366 transitions, 4471 flow [2024-06-28 03:20:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:20:21,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-28 03:20:21,425 INFO L175 Difference]: Start difference. First operand has 301 places, 355 transitions, 3732 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:20:21,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 366 transitions, 4471 flow [2024-06-28 03:20:23,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 366 transitions, 4321 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-28 03:20:23,432 INFO L231 Difference]: Finished difference. Result has 302 places, 355 transitions, 3692 flow [2024-06-28 03:20:23,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3582, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3692, PETRI_PLACES=302, PETRI_TRANSITIONS=355} [2024-06-28 03:20:23,433 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 257 predicate places. [2024-06-28 03:20:23,433 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 355 transitions, 3692 flow [2024-06-28 03:20:23,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:23,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:23,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:23,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 03:20:23,433 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:23,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:23,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1157141167, now seen corresponding path program 1 times [2024-06-28 03:20:23,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:23,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935678289] [2024-06-28 03:20:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:23,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:24,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:24,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935678289] [2024-06-28 03:20:24,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935678289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:24,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:24,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:20:24,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401475429] [2024-06-28 03:20:24,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:24,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:20:24,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:24,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:20:24,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:20:24,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:20:24,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 355 transitions, 3692 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:20:24,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:24,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:20:24,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:25,966 INFO L124 PetriNetUnfolderBase]: 3532/5705 cut-off events. [2024-06-28 03:20:25,966 INFO L125 PetriNetUnfolderBase]: For 1339766/1339766 co-relation queries the response was YES. [2024-06-28 03:20:26,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58558 conditions, 5705 events. 3532/5705 cut-off events. For 1339766/1339766 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35022 event pairs, 830 based on Foata normal form. 1/5658 useless extension candidates. Maximal degree in co-relation 58412. Up to 5312 conditions per place. [2024-06-28 03:20:26,058 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 321 selfloop transitions, 20 changer transitions 0/370 dead transitions. [2024-06-28 03:20:26,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 370 transitions, 4497 flow [2024-06-28 03:20:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:20:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:20:26,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-28 03:20:26,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-28 03:20:26,059 INFO L175 Difference]: Start difference. First operand has 302 places, 355 transitions, 3692 flow. Second operand 9 states and 158 transitions. [2024-06-28 03:20:26,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 370 transitions, 4497 flow [2024-06-28 03:20:28,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 370 transitions, 4369 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-28 03:20:28,012 INFO L231 Difference]: Finished difference. Result has 303 places, 358 transitions, 3708 flow [2024-06-28 03:20:28,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3708, PETRI_PLACES=303, PETRI_TRANSITIONS=358} [2024-06-28 03:20:28,012 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-28 03:20:28,013 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 358 transitions, 3708 flow [2024-06-28 03:20:28,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:20:28,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:28,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:28,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 03:20:28,013 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:28,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:28,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1367178177, now seen corresponding path program 1 times [2024-06-28 03:20:28,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:28,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613577674] [2024-06-28 03:20:28,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:28,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:28,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:28,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613577674] [2024-06-28 03:20:28,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613577674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:28,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:28,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:28,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970869885] [2024-06-28 03:20:28,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:28,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:28,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:28,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:28,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:28,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:20:28,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 358 transitions, 3708 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:28,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:28,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:20:28,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:30,259 INFO L124 PetriNetUnfolderBase]: 3465/5647 cut-off events. [2024-06-28 03:20:30,259 INFO L125 PetriNetUnfolderBase]: For 1384955/1384957 co-relation queries the response was YES. [2024-06-28 03:20:30,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58923 conditions, 5647 events. 3465/5647 cut-off events. For 1384955/1384957 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34968 event pairs, 623 based on Foata normal form. 6/5625 useless extension candidates. Maximal degree in co-relation 58776. Up to 4969 conditions per place. [2024-06-28 03:20:30,333 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 309 selfloop transitions, 27 changer transitions 0/388 dead transitions. [2024-06-28 03:20:30,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 388 transitions, 4557 flow [2024-06-28 03:20:30,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-28 03:20:30,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48579545454545453 [2024-06-28 03:20:30,334 INFO L175 Difference]: Start difference. First operand has 303 places, 358 transitions, 3708 flow. Second operand 8 states and 171 transitions. [2024-06-28 03:20:30,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 388 transitions, 4557 flow [2024-06-28 03:20:32,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 388 transitions, 4365 flow, removed 46 selfloop flow, removed 10 redundant places. [2024-06-28 03:20:32,048 INFO L231 Difference]: Finished difference. Result has 301 places, 361 transitions, 3686 flow [2024-06-28 03:20:32,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3516, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3686, PETRI_PLACES=301, PETRI_TRANSITIONS=361} [2024-06-28 03:20:32,048 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-28 03:20:32,048 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 361 transitions, 3686 flow [2024-06-28 03:20:32,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:32,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:32,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:32,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 03:20:32,049 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:32,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:32,049 INFO L85 PathProgramCache]: Analyzing trace with hash -599347465, now seen corresponding path program 2 times [2024-06-28 03:20:32,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:32,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858207955] [2024-06-28 03:20:32,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:32,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:32,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:32,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858207955] [2024-06-28 03:20:32,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858207955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:32,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:32,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:32,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088091503] [2024-06-28 03:20:32,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:32,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:32,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:32,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:32,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:33,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:20:33,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 361 transitions, 3686 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:33,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:33,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:20:33,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:34,342 INFO L124 PetriNetUnfolderBase]: 3481/5671 cut-off events. [2024-06-28 03:20:34,342 INFO L125 PetriNetUnfolderBase]: For 1411996/1411998 co-relation queries the response was YES. [2024-06-28 03:20:34,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59694 conditions, 5671 events. 3481/5671 cut-off events. For 1411996/1411998 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 35251 event pairs, 802 based on Foata normal form. 6/5629 useless extension candidates. Maximal degree in co-relation 59547. Up to 5039 conditions per place. [2024-06-28 03:20:34,430 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 307 selfloop transitions, 28 changer transitions 0/387 dead transitions. [2024-06-28 03:20:34,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 387 transitions, 4529 flow [2024-06-28 03:20:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-28 03:20:34,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-28 03:20:34,431 INFO L175 Difference]: Start difference. First operand has 301 places, 361 transitions, 3686 flow. Second operand 8 states and 168 transitions. [2024-06-28 03:20:34,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 387 transitions, 4529 flow [2024-06-28 03:20:36,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 387 transitions, 4381 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-28 03:20:36,829 INFO L231 Difference]: Finished difference. Result has 303 places, 364 transitions, 3716 flow [2024-06-28 03:20:36,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3716, PETRI_PLACES=303, PETRI_TRANSITIONS=364} [2024-06-28 03:20:36,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-28 03:20:36,830 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 364 transitions, 3716 flow [2024-06-28 03:20:36,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:36,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:36,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:36,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 03:20:36,830 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:36,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:36,831 INFO L85 PathProgramCache]: Analyzing trace with hash -255261415, now seen corresponding path program 3 times [2024-06-28 03:20:36,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:36,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933850286] [2024-06-28 03:20:36,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:36,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:37,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:37,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933850286] [2024-06-28 03:20:37,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933850286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:37,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:37,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:37,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413058203] [2024-06-28 03:20:37,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:37,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:37,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:37,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:37,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:20:37,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 364 transitions, 3716 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:37,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:37,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:20:37,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:39,075 INFO L124 PetriNetUnfolderBase]: 3497/5695 cut-off events. [2024-06-28 03:20:39,075 INFO L125 PetriNetUnfolderBase]: For 1441715/1441717 co-relation queries the response was YES. [2024-06-28 03:20:39,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60262 conditions, 5695 events. 3497/5695 cut-off events. For 1441715/1441717 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35420 event pairs, 802 based on Foata normal form. 6/5653 useless extension candidates. Maximal degree in co-relation 60114. Up to 5033 conditions per place. [2024-06-28 03:20:39,158 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 294 selfloop transitions, 39 changer transitions 0/385 dead transitions. [2024-06-28 03:20:39,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 385 transitions, 4547 flow [2024-06-28 03:20:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 03:20:39,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-28 03:20:39,159 INFO L175 Difference]: Start difference. First operand has 303 places, 364 transitions, 3716 flow. Second operand 8 states and 163 transitions. [2024-06-28 03:20:39,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 385 transitions, 4547 flow [2024-06-28 03:20:41,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 385 transitions, 4391 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-28 03:20:41,206 INFO L231 Difference]: Finished difference. Result has 305 places, 367 transitions, 3766 flow [2024-06-28 03:20:41,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3560, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3766, PETRI_PLACES=305, PETRI_TRANSITIONS=367} [2024-06-28 03:20:41,206 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 260 predicate places. [2024-06-28 03:20:41,206 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 367 transitions, 3766 flow [2024-06-28 03:20:41,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:41,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:41,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:41,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 03:20:41,206 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:41,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:41,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1903789107, now seen corresponding path program 1 times [2024-06-28 03:20:41,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:41,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276049854] [2024-06-28 03:20:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:41,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:41,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:41,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276049854] [2024-06-28 03:20:41,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276049854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:41,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:41,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:41,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802985327] [2024-06-28 03:20:41,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:41,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:41,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:41,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:41,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:42,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:20:42,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 367 transitions, 3766 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:42,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:42,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:20:42,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:43,386 INFO L124 PetriNetUnfolderBase]: 3683/5926 cut-off events. [2024-06-28 03:20:43,386 INFO L125 PetriNetUnfolderBase]: For 1457166/1457168 co-relation queries the response was YES. [2024-06-28 03:20:43,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61771 conditions, 5926 events. 3683/5926 cut-off events. For 1457166/1457168 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 36198 event pairs, 839 based on Foata normal form. 4/5930 useless extension candidates. Maximal degree in co-relation 61622. Up to 5365 conditions per place. [2024-06-28 03:20:43,475 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 326 selfloop transitions, 40 changer transitions 0/394 dead transitions. [2024-06-28 03:20:43,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 394 transitions, 4673 flow [2024-06-28 03:20:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 03:20:43,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-28 03:20:43,476 INFO L175 Difference]: Start difference. First operand has 305 places, 367 transitions, 3766 flow. Second operand 8 states and 163 transitions. [2024-06-28 03:20:43,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 394 transitions, 4673 flow [2024-06-28 03:20:46,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 394 transitions, 4489 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-28 03:20:46,249 INFO L231 Difference]: Finished difference. Result has 307 places, 371 transitions, 3789 flow [2024-06-28 03:20:46,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3582, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3789, PETRI_PLACES=307, PETRI_TRANSITIONS=371} [2024-06-28 03:20:46,250 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 262 predicate places. [2024-06-28 03:20:46,250 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 371 transitions, 3789 flow [2024-06-28 03:20:46,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:46,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:46,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:46,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 03:20:46,251 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:46,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:46,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1903782349, now seen corresponding path program 1 times [2024-06-28 03:20:46,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:46,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078437268] [2024-06-28 03:20:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:46,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:47,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:47,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078437268] [2024-06-28 03:20:47,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078437268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:47,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:47,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:47,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110542040] [2024-06-28 03:20:47,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:47,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:47,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:47,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:47,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:47,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:20:47,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 371 transitions, 3789 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:47,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:47,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:20:47,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:48,332 INFO L124 PetriNetUnfolderBase]: 3600/5806 cut-off events. [2024-06-28 03:20:48,332 INFO L125 PetriNetUnfolderBase]: For 1476481/1476483 co-relation queries the response was YES. [2024-06-28 03:20:48,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61708 conditions, 5806 events. 3600/5806 cut-off events. For 1476481/1476483 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35695 event pairs, 830 based on Foata normal form. 4/5762 useless extension candidates. Maximal degree in co-relation 61558. Up to 5331 conditions per place. [2024-06-28 03:20:48,417 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 338 selfloop transitions, 27 changer transitions 0/395 dead transitions. [2024-06-28 03:20:48,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 395 transitions, 4646 flow [2024-06-28 03:20:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 03:20:48,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-28 03:20:48,418 INFO L175 Difference]: Start difference. First operand has 307 places, 371 transitions, 3789 flow. Second operand 8 states and 158 transitions. [2024-06-28 03:20:48,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 395 transitions, 4646 flow [2024-06-28 03:20:50,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 395 transitions, 4467 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-28 03:20:50,931 INFO L231 Difference]: Finished difference. Result has 309 places, 375 transitions, 3751 flow [2024-06-28 03:20:50,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3610, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3751, PETRI_PLACES=309, PETRI_TRANSITIONS=375} [2024-06-28 03:20:50,931 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-28 03:20:50,931 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 375 transitions, 3751 flow [2024-06-28 03:20:50,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:50,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:50,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:50,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 03:20:50,932 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:50,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:50,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2025532805, now seen corresponding path program 2 times [2024-06-28 03:20:50,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:50,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446009899] [2024-06-28 03:20:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:50,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:51,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:51,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446009899] [2024-06-28 03:20:51,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446009899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:51,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:51,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:51,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734963430] [2024-06-28 03:20:51,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:51,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:51,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:51,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:51,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:51,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:20:51,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 375 transitions, 3751 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:51,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:51,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:20:51,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:53,135 INFO L124 PetriNetUnfolderBase]: 3703/5954 cut-off events. [2024-06-28 03:20:53,135 INFO L125 PetriNetUnfolderBase]: For 1511814/1511816 co-relation queries the response was YES. [2024-06-28 03:20:53,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62699 conditions, 5954 events. 3703/5954 cut-off events. For 1511814/1511816 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 36365 event pairs, 837 based on Foata normal form. 4/5958 useless extension candidates. Maximal degree in co-relation 62548. Up to 5377 conditions per place. [2024-06-28 03:20:53,215 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 323 selfloop transitions, 47 changer transitions 0/399 dead transitions. [2024-06-28 03:20:53,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 399 transitions, 4666 flow [2024-06-28 03:20:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:53,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:53,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-28 03:20:53,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-28 03:20:53,216 INFO L175 Difference]: Start difference. First operand has 309 places, 375 transitions, 3751 flow. Second operand 8 states and 162 transitions. [2024-06-28 03:20:53,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 399 transitions, 4666 flow [2024-06-28 03:20:55,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 399 transitions, 4573 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 03:20:55,433 INFO L231 Difference]: Finished difference. Result has 311 places, 379 transitions, 3887 flow [2024-06-28 03:20:55,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3658, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3887, PETRI_PLACES=311, PETRI_TRANSITIONS=379} [2024-06-28 03:20:55,433 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-28 03:20:55,434 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 379 transitions, 3887 flow [2024-06-28 03:20:55,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:55,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:20:55,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:20:55,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 03:20:55,434 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:20:55,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:20:55,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1012493475, now seen corresponding path program 3 times [2024-06-28 03:20:55,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:20:55,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485062891] [2024-06-28 03:20:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:20:55,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:20:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:20:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:20:56,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:20:56,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485062891] [2024-06-28 03:20:56,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485062891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:20:56,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:20:56,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:20:56,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001512767] [2024-06-28 03:20:56,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:20:56,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:20:56,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:20:56,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:20:56,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:20:56,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:20:56,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 379 transitions, 3887 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:20:56,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:20:56,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:20:56,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:20:57,693 INFO L124 PetriNetUnfolderBase]: 3729/5992 cut-off events. [2024-06-28 03:20:57,694 INFO L125 PetriNetUnfolderBase]: For 1554875/1554877 co-relation queries the response was YES. [2024-06-28 03:20:57,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64249 conditions, 5992 events. 3729/5992 cut-off events. For 1554875/1554877 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 36610 event pairs, 838 based on Foata normal form. 4/5996 useless extension candidates. Maximal degree in co-relation 64097. Up to 5348 conditions per place. [2024-06-28 03:20:57,774 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 317 selfloop transitions, 59 changer transitions 0/405 dead transitions. [2024-06-28 03:20:57,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 405 transitions, 5164 flow [2024-06-28 03:20:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:20:57,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:20:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 03:20:57,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-28 03:20:57,775 INFO L175 Difference]: Start difference. First operand has 311 places, 379 transitions, 3887 flow. Second operand 8 states and 160 transitions. [2024-06-28 03:20:57,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 405 transitions, 5164 flow [2024-06-28 03:21:00,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 405 transitions, 4963 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-28 03:21:00,271 INFO L231 Difference]: Finished difference. Result has 313 places, 386 transitions, 4029 flow [2024-06-28 03:21:00,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3686, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4029, PETRI_PLACES=313, PETRI_TRANSITIONS=386} [2024-06-28 03:21:00,271 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-28 03:21:00,271 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 386 transitions, 4029 flow [2024-06-28 03:21:00,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:00,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:00,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:00,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 03:21:00,272 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:00,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash -255138035, now seen corresponding path program 2 times [2024-06-28 03:21:00,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:00,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941892917] [2024-06-28 03:21:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:00,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:01,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:01,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941892917] [2024-06-28 03:21:01,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941892917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:01,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:01,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:21:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212754040] [2024-06-28 03:21:01,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:21:01,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:21:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:21:01,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:21:01,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 386 transitions, 4029 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:01,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:01,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:21:01,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:02,478 INFO L124 PetriNetUnfolderBase]: 3654/5883 cut-off events. [2024-06-28 03:21:02,478 INFO L125 PetriNetUnfolderBase]: For 1585872/1585874 co-relation queries the response was YES. [2024-06-28 03:21:02,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64446 conditions, 5883 events. 3654/5883 cut-off events. For 1585872/1585874 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 36171 event pairs, 831 based on Foata normal form. 4/5839 useless extension candidates. Maximal degree in co-relation 64293. Up to 5311 conditions per place. [2024-06-28 03:21:02,564 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 322 selfloop transitions, 57 changer transitions 0/412 dead transitions. [2024-06-28 03:21:02,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 412 transitions, 5429 flow [2024-06-28 03:21:02,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:21:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:21:02,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 03:21:02,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-28 03:21:02,565 INFO L175 Difference]: Start difference. First operand has 313 places, 386 transitions, 4029 flow. Second operand 8 states and 160 transitions. [2024-06-28 03:21:02,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 412 transitions, 5429 flow [2024-06-28 03:21:04,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 412 transitions, 5255 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-28 03:21:04,916 INFO L231 Difference]: Finished difference. Result has 317 places, 393 transitions, 4125 flow [2024-06-28 03:21:04,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3855, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4125, PETRI_PLACES=317, PETRI_TRANSITIONS=393} [2024-06-28 03:21:04,916 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-28 03:21:04,917 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 393 transitions, 4125 flow [2024-06-28 03:21:04,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:04,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:04,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:04,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 03:21:04,917 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:04,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash -405670299, now seen corresponding path program 3 times [2024-06-28 03:21:04,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:04,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495269398] [2024-06-28 03:21:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:04,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:05,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:05,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495269398] [2024-06-28 03:21:05,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495269398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:05,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:05,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:21:05,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113150524] [2024-06-28 03:21:05,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:05,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:21:05,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:05,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:21:05,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:21:05,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:21:05,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 393 transitions, 4125 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:05,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:05,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:21:05,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:07,127 INFO L124 PetriNetUnfolderBase]: 3648/5875 cut-off events. [2024-06-28 03:21:07,127 INFO L125 PetriNetUnfolderBase]: For 1598878/1598880 co-relation queries the response was YES. [2024-06-28 03:21:07,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64376 conditions, 5875 events. 3648/5875 cut-off events. For 1598878/1598880 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 36145 event pairs, 831 based on Foata normal form. 4/5831 useless extension candidates. Maximal degree in co-relation 64221. Up to 5306 conditions per place. [2024-06-28 03:21:07,217 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 321 selfloop transitions, 57 changer transitions 0/411 dead transitions. [2024-06-28 03:21:07,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 411 transitions, 5154 flow [2024-06-28 03:21:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:21:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:21:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 03:21:07,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-28 03:21:07,218 INFO L175 Difference]: Start difference. First operand has 317 places, 393 transitions, 4125 flow. Second operand 8 states and 158 transitions. [2024-06-28 03:21:07,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 411 transitions, 5154 flow [2024-06-28 03:21:10,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 411 transitions, 4992 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-28 03:21:10,202 INFO L231 Difference]: Finished difference. Result has 321 places, 393 transitions, 4087 flow [2024-06-28 03:21:10,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3963, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4087, PETRI_PLACES=321, PETRI_TRANSITIONS=393} [2024-06-28 03:21:10,202 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-28 03:21:10,202 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 393 transitions, 4087 flow [2024-06-28 03:21:10,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:10,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:10,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:10,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 03:21:10,202 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:10,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:10,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1368194474, now seen corresponding path program 1 times [2024-06-28 03:21:10,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:10,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897257807] [2024-06-28 03:21:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:10,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:11,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:11,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897257807] [2024-06-28 03:21:11,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897257807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:11,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:11,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:21:11,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242593762] [2024-06-28 03:21:11,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:11,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:21:11,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:11,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:21:11,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:21:11,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:21:11,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 393 transitions, 4087 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:11,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:11,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:21:11,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:13,255 INFO L124 PetriNetUnfolderBase]: 3905/6333 cut-off events. [2024-06-28 03:21:13,255 INFO L125 PetriNetUnfolderBase]: For 1670859/1670861 co-relation queries the response was YES. [2024-06-28 03:21:13,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66788 conditions, 6333 events. 3905/6333 cut-off events. For 1670859/1670861 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 39755 event pairs, 857 based on Foata normal form. 12/6345 useless extension candidates. Maximal degree in co-relation 66632. Up to 4989 conditions per place. [2024-06-28 03:21:13,350 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 328 selfloop transitions, 87 changer transitions 0/446 dead transitions. [2024-06-28 03:21:13,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 446 transitions, 5220 flow [2024-06-28 03:21:13,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:21:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:21:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-28 03:21:13,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-28 03:21:13,351 INFO L175 Difference]: Start difference. First operand has 321 places, 393 transitions, 4087 flow. Second operand 10 states and 211 transitions. [2024-06-28 03:21:13,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 446 transitions, 5220 flow [2024-06-28 03:21:15,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 446 transitions, 5128 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 03:21:15,874 INFO L231 Difference]: Finished difference. Result has 327 places, 404 transitions, 4360 flow [2024-06-28 03:21:15,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3995, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4360, PETRI_PLACES=327, PETRI_TRANSITIONS=404} [2024-06-28 03:21:15,874 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 282 predicate places. [2024-06-28 03:21:15,874 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 404 transitions, 4360 flow [2024-06-28 03:21:15,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:15,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:15,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:15,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 03:21:15,875 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:15,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:15,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1356689761, now seen corresponding path program 1 times [2024-06-28 03:21:15,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:15,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737604496] [2024-06-28 03:21:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:15,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:16,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:16,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737604496] [2024-06-28 03:21:16,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737604496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:16,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:16,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:16,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466451717] [2024-06-28 03:21:16,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:16,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:16,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:16,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:16,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:16,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:21:16,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 404 transitions, 4360 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:21:16,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:16,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:21:16,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:18,226 INFO L124 PetriNetUnfolderBase]: 3822/6213 cut-off events. [2024-06-28 03:21:18,227 INFO L125 PetriNetUnfolderBase]: For 1660170/1660172 co-relation queries the response was YES. [2024-06-28 03:21:18,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67138 conditions, 6213 events. 3822/6213 cut-off events. For 1660170/1660172 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39127 event pairs, 870 based on Foata normal form. 4/6169 useless extension candidates. Maximal degree in co-relation 66979. Up to 5676 conditions per place. [2024-06-28 03:21:18,321 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 365 selfloop transitions, 33 changer transitions 0/431 dead transitions. [2024-06-28 03:21:18,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 431 transitions, 5333 flow [2024-06-28 03:21:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:18,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:21:18,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-28 03:21:18,322 INFO L175 Difference]: Start difference. First operand has 327 places, 404 transitions, 4360 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:21:18,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 431 transitions, 5333 flow [2024-06-28 03:21:21,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 431 transitions, 5157 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-28 03:21:21,136 INFO L231 Difference]: Finished difference. Result has 328 places, 408 transitions, 4379 flow [2024-06-28 03:21:21,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4379, PETRI_PLACES=328, PETRI_TRANSITIONS=408} [2024-06-28 03:21:21,137 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-28 03:21:21,137 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 408 transitions, 4379 flow [2024-06-28 03:21:21,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:21:21,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:21,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:21,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 03:21:21,137 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:21,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:21,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1012603711, now seen corresponding path program 2 times [2024-06-28 03:21:21,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:21,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002963557] [2024-06-28 03:21:21,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:21,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:22,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:22,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002963557] [2024-06-28 03:21:22,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002963557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:22,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:22,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:22,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144845527] [2024-06-28 03:21:22,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:22,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:22,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:22,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:22,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:22,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:21:22,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 408 transitions, 4379 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:21:22,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:22,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:21:22,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:23,495 INFO L124 PetriNetUnfolderBase]: 3864/6273 cut-off events. [2024-06-28 03:21:23,496 INFO L125 PetriNetUnfolderBase]: For 1714400/1714402 co-relation queries the response was YES. [2024-06-28 03:21:23,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68573 conditions, 6273 events. 3864/6273 cut-off events. For 1714400/1714402 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 39570 event pairs, 870 based on Foata normal form. 4/6229 useless extension candidates. Maximal degree in co-relation 68416. Up to 5605 conditions per place. [2024-06-28 03:21:23,591 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 338 selfloop transitions, 69 changer transitions 0/440 dead transitions. [2024-06-28 03:21:23,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 440 transitions, 6066 flow [2024-06-28 03:21:23,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 03:21:23,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-28 03:21:23,592 INFO L175 Difference]: Start difference. First operand has 328 places, 408 transitions, 4379 flow. Second operand 9 states and 178 transitions. [2024-06-28 03:21:23,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 440 transitions, 6066 flow [2024-06-28 03:21:26,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 440 transitions, 5899 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-28 03:21:26,079 INFO L231 Difference]: Finished difference. Result has 331 places, 420 transitions, 4770 flow [2024-06-28 03:21:26,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4212, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4770, PETRI_PLACES=331, PETRI_TRANSITIONS=420} [2024-06-28 03:21:26,080 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-28 03:21:26,080 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 420 transitions, 4770 flow [2024-06-28 03:21:26,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:21:26,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:26,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:26,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 03:21:26,080 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:26,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:26,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1012200091, now seen corresponding path program 3 times [2024-06-28 03:21:26,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:26,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856534606] [2024-06-28 03:21:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:26,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:27,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:27,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856534606] [2024-06-28 03:21:27,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856534606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:27,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:27,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:27,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523510684] [2024-06-28 03:21:27,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:27,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:27,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:27,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:27,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:27,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:21:27,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 420 transitions, 4770 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:21:27,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:27,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:21:27,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:28,476 INFO L124 PetriNetUnfolderBase]: 3876/6294 cut-off events. [2024-06-28 03:21:28,476 INFO L125 PetriNetUnfolderBase]: For 1750058/1750060 co-relation queries the response was YES. [2024-06-28 03:21:28,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69773 conditions, 6294 events. 3876/6294 cut-off events. For 1750058/1750060 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 39731 event pairs, 870 based on Foata normal form. 4/6250 useless extension candidates. Maximal degree in co-relation 69614. Up to 5618 conditions per place. [2024-06-28 03:21:28,575 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 340 selfloop transitions, 71 changer transitions 0/444 dead transitions. [2024-06-28 03:21:28,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 444 transitions, 6240 flow [2024-06-28 03:21:28,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:28,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:28,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:21:28,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-28 03:21:28,576 INFO L175 Difference]: Start difference. First operand has 331 places, 420 transitions, 4770 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:21:28,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 444 transitions, 6240 flow [2024-06-28 03:21:31,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 444 transitions, 6040 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-28 03:21:31,896 INFO L231 Difference]: Finished difference. Result has 336 places, 424 transitions, 4850 flow [2024-06-28 03:21:31,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4590, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4850, PETRI_PLACES=336, PETRI_TRANSITIONS=424} [2024-06-28 03:21:31,896 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 291 predicate places. [2024-06-28 03:21:31,897 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 424 transitions, 4850 flow [2024-06-28 03:21:31,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:21:31,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:31,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:31,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 03:21:31,897 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:31,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:31,898 INFO L85 PathProgramCache]: Analyzing trace with hash -888476805, now seen corresponding path program 1 times [2024-06-28 03:21:31,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:31,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656748584] [2024-06-28 03:21:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:31,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:32,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:32,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656748584] [2024-06-28 03:21:32,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656748584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:32,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:32,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:32,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496301398] [2024-06-28 03:21:32,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:32,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:32,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:32,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:32,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:32,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:21:32,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 424 transitions, 4850 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:21:32,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:32,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:21:32,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:34,303 INFO L124 PetriNetUnfolderBase]: 3881/6300 cut-off events. [2024-06-28 03:21:34,303 INFO L125 PetriNetUnfolderBase]: For 1768005/1768005 co-relation queries the response was YES. [2024-06-28 03:21:34,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69994 conditions, 6300 events. 3881/6300 cut-off events. For 1768005/1768005 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 39782 event pairs, 868 based on Foata normal form. 1/6253 useless extension candidates. Maximal degree in co-relation 69833. Up to 5829 conditions per place. [2024-06-28 03:21:34,399 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 390 selfloop transitions, 21 changer transitions 0/444 dead transitions. [2024-06-28 03:21:34,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 444 transitions, 5829 flow [2024-06-28 03:21:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:34,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:21:34,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-28 03:21:34,400 INFO L175 Difference]: Start difference. First operand has 336 places, 424 transitions, 4850 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:21:34,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 444 transitions, 5829 flow [2024-06-28 03:21:37,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 444 transitions, 5589 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-28 03:21:37,960 INFO L231 Difference]: Finished difference. Result has 338 places, 427 transitions, 4776 flow [2024-06-28 03:21:37,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4610, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4776, PETRI_PLACES=338, PETRI_TRANSITIONS=427} [2024-06-28 03:21:37,960 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-28 03:21:37,960 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 427 transitions, 4776 flow [2024-06-28 03:21:37,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:21:37,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:37,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:37,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 03:21:37,961 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:37,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:37,961 INFO L85 PathProgramCache]: Analyzing trace with hash -254830949, now seen corresponding path program 4 times [2024-06-28 03:21:37,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:37,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897504133] [2024-06-28 03:21:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:37,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:38,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:38,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897504133] [2024-06-28 03:21:38,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897504133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:38,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:38,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:21:38,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417583441] [2024-06-28 03:21:38,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:38,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:21:38,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:21:38,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:21:39,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:21:39,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 427 transitions, 4776 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:21:39,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:39,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:21:39,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:40,429 INFO L124 PetriNetUnfolderBase]: 3887/6307 cut-off events. [2024-06-28 03:21:40,429 INFO L125 PetriNetUnfolderBase]: For 1775465/1775467 co-relation queries the response was YES. [2024-06-28 03:21:40,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70011 conditions, 6307 events. 3887/6307 cut-off events. For 1775465/1775467 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39772 event pairs, 869 based on Foata normal form. 4/6263 useless extension candidates. Maximal degree in co-relation 69850. Up to 5623 conditions per place. [2024-06-28 03:21:40,526 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 343 selfloop transitions, 71 changer transitions 0/447 dead transitions. [2024-06-28 03:21:40,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 447 transitions, 6129 flow [2024-06-28 03:21:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:21:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:21:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 03:21:40,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:21:40,527 INFO L175 Difference]: Start difference. First operand has 338 places, 427 transitions, 4776 flow. Second operand 9 states and 176 transitions. [2024-06-28 03:21:40,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 447 transitions, 6129 flow [2024-06-28 03:21:44,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 447 transitions, 5905 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-28 03:21:44,243 INFO L231 Difference]: Finished difference. Result has 340 places, 427 transitions, 4702 flow [2024-06-28 03:21:44,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4552, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4702, PETRI_PLACES=340, PETRI_TRANSITIONS=427} [2024-06-28 03:21:44,243 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-28 03:21:44,243 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 427 transitions, 4702 flow [2024-06-28 03:21:44,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:21:44,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:44,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:44,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 03:21:44,243 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:44,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:44,244 INFO L85 PathProgramCache]: Analyzing trace with hash -502812885, now seen corresponding path program 4 times [2024-06-28 03:21:44,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:44,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435792719] [2024-06-28 03:21:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:44,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:45,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:45,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435792719] [2024-06-28 03:21:45,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435792719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:45,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:45,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:21:45,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689523455] [2024-06-28 03:21:45,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:45,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:21:45,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:45,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:21:45,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:21:45,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:21:45,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 427 transitions, 4702 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:45,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:45,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:21:45,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:46,594 INFO L124 PetriNetUnfolderBase]: 3800/6224 cut-off events. [2024-06-28 03:21:46,595 INFO L125 PetriNetUnfolderBase]: For 1810957/1810959 co-relation queries the response was YES. [2024-06-28 03:21:46,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69667 conditions, 6224 events. 3800/6224 cut-off events. For 1810957/1810959 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39670 event pairs, 867 based on Foata normal form. 6/6182 useless extension candidates. Maximal degree in co-relation 69505. Up to 5440 conditions per place. [2024-06-28 03:21:46,698 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 327 selfloop transitions, 56 changer transitions 0/442 dead transitions. [2024-06-28 03:21:46,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 442 transitions, 5636 flow [2024-06-28 03:21:46,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:21:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:21:46,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 03:21:46,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-28 03:21:46,699 INFO L175 Difference]: Start difference. First operand has 340 places, 427 transitions, 4702 flow. Second operand 8 states and 160 transitions. [2024-06-28 03:21:46,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 442 transitions, 5636 flow [2024-06-28 03:21:50,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 442 transitions, 5493 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 03:21:50,146 INFO L231 Difference]: Finished difference. Result has 341 places, 430 transitions, 4821 flow [2024-06-28 03:21:50,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4559, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4821, PETRI_PLACES=341, PETRI_TRANSITIONS=430} [2024-06-28 03:21:50,146 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-28 03:21:50,146 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 430 transitions, 4821 flow [2024-06-28 03:21:50,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:50,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:50,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:50,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 03:21:50,147 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:50,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash -184008841, now seen corresponding path program 4 times [2024-06-28 03:21:50,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:50,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170794326] [2024-06-28 03:21:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:50,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:50,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:50,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170794326] [2024-06-28 03:21:50,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170794326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:50,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:50,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:21:50,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172432703] [2024-06-28 03:21:50,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:50,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:21:50,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:50,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:21:50,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:21:51,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:21:51,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 430 transitions, 4821 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:51,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:51,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:21:51,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:52,515 INFO L124 PetriNetUnfolderBase]: 3971/6425 cut-off events. [2024-06-28 03:21:52,515 INFO L125 PetriNetUnfolderBase]: For 1822127/1822127 co-relation queries the response was YES. [2024-06-28 03:21:52,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71291 conditions, 6425 events. 3971/6425 cut-off events. For 1822127/1822127 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 40277 event pairs, 897 based on Foata normal form. 1/6426 useless extension candidates. Maximal degree in co-relation 71128. Up to 5820 conditions per place. [2024-06-28 03:21:52,618 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 380 selfloop transitions, 42 changer transitions 0/453 dead transitions. [2024-06-28 03:21:52,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 453 transitions, 5827 flow [2024-06-28 03:21:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:21:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:21:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 03:21:52,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-28 03:21:52,628 INFO L175 Difference]: Start difference. First operand has 341 places, 430 transitions, 4821 flow. Second operand 8 states and 160 transitions. [2024-06-28 03:21:52,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 453 transitions, 5827 flow [2024-06-28 03:21:56,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 453 transitions, 5587 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-28 03:21:56,540 INFO L231 Difference]: Finished difference. Result has 343 places, 433 transitions, 4787 flow [2024-06-28 03:21:56,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4581, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4787, PETRI_PLACES=343, PETRI_TRANSITIONS=433} [2024-06-28 03:21:56,541 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-28 03:21:56,541 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 433 transitions, 4787 flow [2024-06-28 03:21:56,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:56,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:21:56,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:21:56,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 03:21:56,541 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:21:56,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:21:56,541 INFO L85 PathProgramCache]: Analyzing trace with hash -325674509, now seen corresponding path program 5 times [2024-06-28 03:21:56,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:21:56,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242976242] [2024-06-28 03:21:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:21:56,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:21:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:21:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:21:57,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:21:57,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242976242] [2024-06-28 03:21:57,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242976242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:21:57,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:21:57,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:21:57,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207831065] [2024-06-28 03:21:57,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:21:57,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:21:57,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:21:57,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:21:57,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:21:57,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:21:57,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 433 transitions, 4787 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:21:57,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:21:57,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:21:57,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:21:58,953 INFO L124 PetriNetUnfolderBase]: 3976/6442 cut-off events. [2024-06-28 03:21:58,953 INFO L125 PetriNetUnfolderBase]: For 1850265/1850265 co-relation queries the response was YES. [2024-06-28 03:21:59,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71476 conditions, 6442 events. 3976/6442 cut-off events. For 1850265/1850265 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 40462 event pairs, 898 based on Foata normal form. 1/6443 useless extension candidates. Maximal degree in co-relation 71312. Up to 5817 conditions per place. [2024-06-28 03:21:59,215 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 376 selfloop transitions, 50 changer transitions 0/457 dead transitions. [2024-06-28 03:21:59,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 457 transitions, 6159 flow [2024-06-28 03:21:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:21:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:21:59,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:21:59,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-28 03:21:59,216 INFO L175 Difference]: Start difference. First operand has 343 places, 433 transitions, 4787 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:21:59,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 457 transitions, 6159 flow [2024-06-28 03:22:02,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 457 transitions, 5979 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-28 03:22:02,833 INFO L231 Difference]: Finished difference. Result has 345 places, 439 transitions, 4951 flow [2024-06-28 03:22:02,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4951, PETRI_PLACES=345, PETRI_TRANSITIONS=439} [2024-06-28 03:22:02,834 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-28 03:22:02,834 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 439 transitions, 4951 flow [2024-06-28 03:22:02,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:02,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:02,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:02,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 03:22:02,834 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:02,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash 875291263, now seen corresponding path program 6 times [2024-06-28 03:22:02,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:02,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780552698] [2024-06-28 03:22:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:02,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:03,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:03,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780552698] [2024-06-28 03:22:03,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780552698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:03,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:03,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:22:03,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573862744] [2024-06-28 03:22:03,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:03,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:22:03,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:03,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:22:03,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:22:03,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:22:03,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 439 transitions, 4951 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:03,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:03,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:22:03,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:05,323 INFO L124 PetriNetUnfolderBase]: 3973/6428 cut-off events. [2024-06-28 03:22:05,324 INFO L125 PetriNetUnfolderBase]: For 1873346/1873346 co-relation queries the response was YES. [2024-06-28 03:22:05,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71584 conditions, 6428 events. 3973/6428 cut-off events. For 1873346/1873346 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 40238 event pairs, 898 based on Foata normal form. 1/6429 useless extension candidates. Maximal degree in co-relation 71419. Up to 5823 conditions per place. [2024-06-28 03:22:05,408 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 385 selfloop transitions, 43 changer transitions 0/459 dead transitions. [2024-06-28 03:22:05,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 459 transitions, 5859 flow [2024-06-28 03:22:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:22:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:22:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 03:22:05,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-28 03:22:05,409 INFO L175 Difference]: Start difference. First operand has 345 places, 439 transitions, 4951 flow. Second operand 8 states and 160 transitions. [2024-06-28 03:22:05,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 459 transitions, 5859 flow [2024-06-28 03:22:09,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 459 transitions, 5608 flow, removed 101 selfloop flow, removed 4 redundant places. [2024-06-28 03:22:09,181 INFO L231 Difference]: Finished difference. Result has 349 places, 439 transitions, 4792 flow [2024-06-28 03:22:09,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4700, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4792, PETRI_PLACES=349, PETRI_TRANSITIONS=439} [2024-06-28 03:22:09,181 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-28 03:22:09,181 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 439 transitions, 4792 flow [2024-06-28 03:22:09,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:09,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:09,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:09,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 03:22:09,182 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:09,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:09,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1712051481, now seen corresponding path program 7 times [2024-06-28 03:22:09,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:09,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857112783] [2024-06-28 03:22:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:09,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:09,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:09,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857112783] [2024-06-28 03:22:09,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857112783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:09,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:09,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:09,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549220337] [2024-06-28 03:22:09,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:09,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:09,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:09,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:09,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:10,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:22:10,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 439 transitions, 4792 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:10,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:10,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:22:10,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:11,664 INFO L124 PetriNetUnfolderBase]: 3978/6435 cut-off events. [2024-06-28 03:22:11,664 INFO L125 PetriNetUnfolderBase]: For 1901330/1901330 co-relation queries the response was YES. [2024-06-28 03:22:11,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71893 conditions, 6435 events. 3978/6435 cut-off events. For 1901330/1901330 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 40304 event pairs, 897 based on Foata normal form. 1/6436 useless extension candidates. Maximal degree in co-relation 71726. Up to 5815 conditions per place. [2024-06-28 03:22:11,755 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 373 selfloop transitions, 55 changer transitions 0/459 dead transitions. [2024-06-28 03:22:11,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 459 transitions, 5814 flow [2024-06-28 03:22:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:22:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:22:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:22:11,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-28 03:22:11,756 INFO L175 Difference]: Start difference. First operand has 349 places, 439 transitions, 4792 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:22:11,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 459 transitions, 5814 flow [2024-06-28 03:22:16,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 459 transitions, 5710 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 03:22:16,388 INFO L231 Difference]: Finished difference. Result has 350 places, 442 transitions, 4932 flow [2024-06-28 03:22:16,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4688, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4932, PETRI_PLACES=350, PETRI_TRANSITIONS=442} [2024-06-28 03:22:16,388 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 305 predicate places. [2024-06-28 03:22:16,389 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 442 transitions, 4932 flow [2024-06-28 03:22:16,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:16,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:16,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:16,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 03:22:16,389 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:16,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:16,389 INFO L85 PathProgramCache]: Analyzing trace with hash 939011215, now seen corresponding path program 4 times [2024-06-28 03:22:16,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:16,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110962771] [2024-06-28 03:22:16,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:16,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:17,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:17,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110962771] [2024-06-28 03:22:17,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110962771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:17,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:17,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:17,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473578235] [2024-06-28 03:22:17,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:17,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:17,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:17,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:17,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:17,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:22:17,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 442 transitions, 4932 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:17,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:17,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:22:17,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:18,803 INFO L124 PetriNetUnfolderBase]: 3895/6314 cut-off events. [2024-06-28 03:22:18,804 INFO L125 PetriNetUnfolderBase]: For 1916193/1916193 co-relation queries the response was YES. [2024-06-28 03:22:18,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71523 conditions, 6314 events. 3895/6314 cut-off events. For 1916193/1916193 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39709 event pairs, 882 based on Foata normal form. 1/6267 useless extension candidates. Maximal degree in co-relation 71355. Up to 5772 conditions per place. [2024-06-28 03:22:18,896 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 396 selfloop transitions, 26 changer transitions 0/459 dead transitions. [2024-06-28 03:22:18,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 459 transitions, 5820 flow [2024-06-28 03:22:18,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:22:18,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:22:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-28 03:22:18,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 03:22:18,897 INFO L175 Difference]: Start difference. First operand has 350 places, 442 transitions, 4932 flow. Second operand 8 states and 154 transitions. [2024-06-28 03:22:18,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 459 transitions, 5820 flow [2024-06-28 03:22:22,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 459 transitions, 5570 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-28 03:22:22,413 INFO L231 Difference]: Finished difference. Result has 352 places, 442 transitions, 4740 flow [2024-06-28 03:22:22,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4682, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4740, PETRI_PLACES=352, PETRI_TRANSITIONS=442} [2024-06-28 03:22:22,413 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 307 predicate places. [2024-06-28 03:22:22,413 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 442 transitions, 4740 flow [2024-06-28 03:22:22,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:22,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:22,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:22,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-28 03:22:22,414 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:22,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:22,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1884541371, now seen corresponding path program 8 times [2024-06-28 03:22:22,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:22,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137075903] [2024-06-28 03:22:22,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:22,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:23,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:23,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137075903] [2024-06-28 03:22:23,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137075903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:23,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:23,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:23,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991923295] [2024-06-28 03:22:23,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:23,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:23,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:23,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:23,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:23,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:22:23,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 442 transitions, 4740 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:23,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:23,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:22:23,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:24,930 INFO L124 PetriNetUnfolderBase]: 3984/6442 cut-off events. [2024-06-28 03:22:24,930 INFO L125 PetriNetUnfolderBase]: For 1964728/1964728 co-relation queries the response was YES. [2024-06-28 03:22:24,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72728 conditions, 6442 events. 3984/6442 cut-off events. For 1964728/1964728 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 40391 event pairs, 897 based on Foata normal form. 1/6443 useless extension candidates. Maximal degree in co-relation 72559. Up to 5791 conditions per place. [2024-06-28 03:22:25,026 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 353 selfloop transitions, 79 changer transitions 0/463 dead transitions. [2024-06-28 03:22:25,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 463 transitions, 6148 flow [2024-06-28 03:22:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:22:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:22:25,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-28 03:22:25,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-28 03:22:25,027 INFO L175 Difference]: Start difference. First operand has 352 places, 442 transitions, 4740 flow. Second operand 8 states and 159 transitions. [2024-06-28 03:22:25,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 463 transitions, 6148 flow [2024-06-28 03:22:29,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 463 transitions, 5947 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-28 03:22:29,170 INFO L231 Difference]: Finished difference. Result has 350 places, 448 transitions, 4965 flow [2024-06-28 03:22:29,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4539, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4965, PETRI_PLACES=350, PETRI_TRANSITIONS=448} [2024-06-28 03:22:29,171 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 305 predicate places. [2024-06-28 03:22:29,171 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 448 transitions, 4965 flow [2024-06-28 03:22:29,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:29,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:29,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:29,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-28 03:22:29,172 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:29,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:29,172 INFO L85 PathProgramCache]: Analyzing trace with hash 271637747, now seen corresponding path program 5 times [2024-06-28 03:22:29,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:29,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426208191] [2024-06-28 03:22:29,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:29,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:30,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:30,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426208191] [2024-06-28 03:22:30,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426208191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:30,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:30,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:30,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089304634] [2024-06-28 03:22:30,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:30,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:30,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:30,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:30,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:30,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:22:30,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 448 transitions, 4965 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:30,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:30,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:22:30,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:31,526 INFO L124 PetriNetUnfolderBase]: 3921/6350 cut-off events. [2024-06-28 03:22:31,526 INFO L125 PetriNetUnfolderBase]: For 1998743/1998743 co-relation queries the response was YES. [2024-06-28 03:22:31,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72890 conditions, 6350 events. 3921/6350 cut-off events. For 1998743/1998743 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39907 event pairs, 880 based on Foata normal form. 1/6303 useless extension candidates. Maximal degree in co-relation 72720. Up to 5775 conditions per place. [2024-06-28 03:22:31,618 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 383 selfloop transitions, 47 changer transitions 0/469 dead transitions. [2024-06-28 03:22:31,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 469 transitions, 6262 flow [2024-06-28 03:22:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:22:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:22:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:22:31,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-28 03:22:31,619 INFO L175 Difference]: Start difference. First operand has 350 places, 448 transitions, 4965 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:22:31,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 469 transitions, 6262 flow [2024-06-28 03:22:36,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 469 transitions, 6041 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-28 03:22:36,006 INFO L231 Difference]: Finished difference. Result has 355 places, 454 transitions, 5020 flow [2024-06-28 03:22:36,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5020, PETRI_PLACES=355, PETRI_TRANSITIONS=454} [2024-06-28 03:22:36,006 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 310 predicate places. [2024-06-28 03:22:36,006 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 454 transitions, 5020 flow [2024-06-28 03:22:36,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:36,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:36,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:36,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-28 03:22:36,007 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:36,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:36,007 INFO L85 PathProgramCache]: Analyzing trace with hash 271162269, now seen corresponding path program 9 times [2024-06-28 03:22:36,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:36,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553348200] [2024-06-28 03:22:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:36,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:36,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:36,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553348200] [2024-06-28 03:22:36,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553348200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:36,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:36,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:36,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469365674] [2024-06-28 03:22:36,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:36,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:36,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:36,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:36,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:36,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:22:36,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 454 transitions, 5020 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:36,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:36,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:22:36,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:38,548 INFO L124 PetriNetUnfolderBase]: 3994/6456 cut-off events. [2024-06-28 03:22:38,548 INFO L125 PetriNetUnfolderBase]: For 2027865/2027865 co-relation queries the response was YES. [2024-06-28 03:22:38,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73735 conditions, 6456 events. 3994/6456 cut-off events. For 2027865/2027865 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 40428 event pairs, 896 based on Foata normal form. 1/6457 useless extension candidates. Maximal degree in co-relation 73562. Up to 5801 conditions per place. [2024-06-28 03:22:38,660 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 357 selfloop transitions, 78 changer transitions 0/468 dead transitions. [2024-06-28 03:22:38,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 468 transitions, 5926 flow [2024-06-28 03:22:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:22:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:22:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 03:22:38,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-28 03:22:38,661 INFO L175 Difference]: Start difference. First operand has 355 places, 454 transitions, 5020 flow. Second operand 8 states and 157 transitions. [2024-06-28 03:22:38,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 468 transitions, 5926 flow [2024-06-28 03:22:43,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 468 transitions, 5713 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-28 03:22:43,829 INFO L231 Difference]: Finished difference. Result has 358 places, 454 transitions, 4969 flow [2024-06-28 03:22:43,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4807, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4969, PETRI_PLACES=358, PETRI_TRANSITIONS=454} [2024-06-28 03:22:43,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-28 03:22:43,830 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 454 transitions, 4969 flow [2024-06-28 03:22:43,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:43,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:43,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:43,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-28 03:22:43,830 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:43,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:43,831 INFO L85 PathProgramCache]: Analyzing trace with hash 271162517, now seen corresponding path program 6 times [2024-06-28 03:22:43,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:43,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14489297] [2024-06-28 03:22:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:43,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:44,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:44,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14489297] [2024-06-28 03:22:44,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14489297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:44,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:44,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:22:44,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368692200] [2024-06-28 03:22:44,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:44,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:22:44,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:44,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:22:44,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:22:44,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:22:44,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 454 transitions, 4969 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:44,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:44,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:22:44,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:46,233 INFO L124 PetriNetUnfolderBase]: 3915/6342 cut-off events. [2024-06-28 03:22:46,233 INFO L125 PetriNetUnfolderBase]: For 2040278/2040278 co-relation queries the response was YES. [2024-06-28 03:22:46,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72997 conditions, 6342 events. 3915/6342 cut-off events. For 2040278/2040278 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39917 event pairs, 880 based on Foata normal form. 1/6295 useless extension candidates. Maximal degree in co-relation 72823. Up to 5769 conditions per place. [2024-06-28 03:22:46,332 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 384 selfloop transitions, 45 changer transitions 0/468 dead transitions. [2024-06-28 03:22:46,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 468 transitions, 5863 flow [2024-06-28 03:22:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:22:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:22:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:22:46,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-28 03:22:46,333 INFO L175 Difference]: Start difference. First operand has 358 places, 454 transitions, 4969 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:22:46,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 468 transitions, 5863 flow [2024-06-28 03:22:49,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 468 transitions, 5634 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-28 03:22:49,994 INFO L231 Difference]: Finished difference. Result has 359 places, 454 transitions, 4836 flow [2024-06-28 03:22:49,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4740, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4836, PETRI_PLACES=359, PETRI_TRANSITIONS=454} [2024-06-28 03:22:49,995 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-28 03:22:49,995 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 454 transitions, 4836 flow [2024-06-28 03:22:49,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:49,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:49,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:49,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-28 03:22:49,996 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:49,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:49,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1919261550, now seen corresponding path program 2 times [2024-06-28 03:22:49,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:49,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164997664] [2024-06-28 03:22:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:49,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:51,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:51,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164997664] [2024-06-28 03:22:51,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164997664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:51,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:51,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:22:51,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912267758] [2024-06-28 03:22:51,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:51,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:22:51,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:51,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:22:51,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:22:51,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:22:51,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 454 transitions, 4836 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:51,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:51,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:22:51,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:22:53,039 INFO L124 PetriNetUnfolderBase]: 4103/6678 cut-off events. [2024-06-28 03:22:53,039 INFO L125 PetriNetUnfolderBase]: For 2131007/2131009 co-relation queries the response was YES. [2024-06-28 03:22:53,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75020 conditions, 6678 events. 4103/6678 cut-off events. For 2131007/2131009 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 42546 event pairs, 905 based on Foata normal form. 14/6692 useless extension candidates. Maximal degree in co-relation 74845. Up to 5598 conditions per place. [2024-06-28 03:22:53,151 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 380 selfloop transitions, 86 changer transitions 0/499 dead transitions. [2024-06-28 03:22:53,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 499 transitions, 6019 flow [2024-06-28 03:22:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:22:53,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:22:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-28 03:22:53,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-28 03:22:53,152 INFO L175 Difference]: Start difference. First operand has 359 places, 454 transitions, 4836 flow. Second operand 10 states and 207 transitions. [2024-06-28 03:22:53,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 499 transitions, 6019 flow [2024-06-28 03:22:58,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 499 transitions, 5912 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 03:22:58,441 INFO L231 Difference]: Finished difference. Result has 364 places, 460 transitions, 5020 flow [2024-06-28 03:22:58,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4729, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5020, PETRI_PLACES=364, PETRI_TRANSITIONS=460} [2024-06-28 03:22:58,442 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 319 predicate places. [2024-06-28 03:22:58,442 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 460 transitions, 5020 flow [2024-06-28 03:22:58,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:58,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:22:58,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:22:58,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-28 03:22:58,442 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:22:58,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:22:58,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2111539320, now seen corresponding path program 3 times [2024-06-28 03:22:58,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:22:58,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050670545] [2024-06-28 03:22:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:22:58,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:22:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:22:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:22:59,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:22:59,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050670545] [2024-06-28 03:22:59,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050670545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:22:59,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:22:59,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:22:59,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677982865] [2024-06-28 03:22:59,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:22:59,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:22:59,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:22:59,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:22:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:22:59,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:22:59,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 460 transitions, 5020 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:22:59,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:22:59,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:22:59,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:01,407 INFO L124 PetriNetUnfolderBase]: 4224/6907 cut-off events. [2024-06-28 03:23:01,407 INFO L125 PetriNetUnfolderBase]: For 2171978/2171980 co-relation queries the response was YES. [2024-06-28 03:23:01,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77032 conditions, 6907 events. 4224/6907 cut-off events. For 2171978/2171980 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 44589 event pairs, 944 based on Foata normal form. 14/6921 useless extension candidates. Maximal degree in co-relation 76854. Up to 5717 conditions per place. [2024-06-28 03:23:01,522 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 386 selfloop transitions, 87 changer transitions 0/506 dead transitions. [2024-06-28 03:23:01,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 506 transitions, 6246 flow [2024-06-28 03:23:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:23:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:23:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-28 03:23:01,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-28 03:23:01,523 INFO L175 Difference]: Start difference. First operand has 364 places, 460 transitions, 5020 flow. Second operand 10 states and 208 transitions. [2024-06-28 03:23:01,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 506 transitions, 6246 flow [2024-06-28 03:23:06,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 506 transitions, 6055 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 03:23:06,957 INFO L231 Difference]: Finished difference. Result has 371 places, 468 transitions, 5161 flow [2024-06-28 03:23:06,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4837, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5161, PETRI_PLACES=371, PETRI_TRANSITIONS=468} [2024-06-28 03:23:06,957 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 326 predicate places. [2024-06-28 03:23:06,957 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 468 transitions, 5161 flow [2024-06-28 03:23:06,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:06,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:06,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:06,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-28 03:23:06,958 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:23:06,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:06,958 INFO L85 PathProgramCache]: Analyzing trace with hash -251412360, now seen corresponding path program 4 times [2024-06-28 03:23:06,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:06,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067189068] [2024-06-28 03:23:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:06,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:06,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:08,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:08,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067189068] [2024-06-28 03:23:08,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067189068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:08,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:08,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:23:08,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725604916] [2024-06-28 03:23:08,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:08,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:23:08,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:08,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:23:08,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:23:08,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:23:08,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 468 transitions, 5161 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:08,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:08,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:23:08,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:10,126 INFO L124 PetriNetUnfolderBase]: 4245/6956 cut-off events. [2024-06-28 03:23:10,126 INFO L125 PetriNetUnfolderBase]: For 2143884/2143886 co-relation queries the response was YES. [2024-06-28 03:23:10,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76441 conditions, 6956 events. 4245/6956 cut-off events. For 2143884/2143886 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 45166 event pairs, 945 based on Foata normal form. 14/6970 useless extension candidates. Maximal degree in co-relation 76260. Up to 5848 conditions per place. [2024-06-28 03:23:10,247 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 379 selfloop transitions, 97 changer transitions 0/509 dead transitions. [2024-06-28 03:23:10,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 509 transitions, 6309 flow [2024-06-28 03:23:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:23:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:23:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-28 03:23:10,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-28 03:23:10,248 INFO L175 Difference]: Start difference. First operand has 371 places, 468 transitions, 5161 flow. Second operand 10 states and 206 transitions. [2024-06-28 03:23:10,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 509 transitions, 6309 flow [2024-06-28 03:23:15,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 509 transitions, 6113 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 03:23:15,601 INFO L231 Difference]: Finished difference. Result has 377 places, 471 transitions, 5215 flow [2024-06-28 03:23:15,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4969, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5215, PETRI_PLACES=377, PETRI_TRANSITIONS=471} [2024-06-28 03:23:15,601 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 332 predicate places. [2024-06-28 03:23:15,601 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 471 transitions, 5215 flow [2024-06-28 03:23:15,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:15,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:15,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:15,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-28 03:23:15,602 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:23:15,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:15,602 INFO L85 PathProgramCache]: Analyzing trace with hash 73328760, now seen corresponding path program 5 times [2024-06-28 03:23:15,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:15,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998358238] [2024-06-28 03:23:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:15,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:16,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:16,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998358238] [2024-06-28 03:23:16,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998358238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:16,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:16,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:23:16,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729940165] [2024-06-28 03:23:16,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:16,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:23:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:16,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:23:16,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:23:16,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:23:16,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 471 transitions, 5215 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:16,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:16,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:23:16,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:18,810 INFO L124 PetriNetUnfolderBase]: 4229/6928 cut-off events. [2024-06-28 03:23:18,810 INFO L125 PetriNetUnfolderBase]: For 2136089/2136107 co-relation queries the response was YES. [2024-06-28 03:23:18,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75477 conditions, 6928 events. 4229/6928 cut-off events. For 2136089/2136107 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 44858 event pairs, 867 based on Foata normal form. 14/6940 useless extension candidates. Maximal degree in co-relation 75294. Up to 4783 conditions per place. [2024-06-28 03:23:18,910 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 363 selfloop transitions, 113 changer transitions 0/509 dead transitions. [2024-06-28 03:23:18,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 509 transitions, 6205 flow [2024-06-28 03:23:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:23:18,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:23:18,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-28 03:23:18,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-28 03:23:18,911 INFO L175 Difference]: Start difference. First operand has 377 places, 471 transitions, 5215 flow. Second operand 10 states and 205 transitions. [2024-06-28 03:23:18,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 509 transitions, 6205 flow [2024-06-28 03:23:23,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 509 transitions, 5884 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 03:23:24,001 INFO L231 Difference]: Finished difference. Result has 379 places, 470 transitions, 5006 flow [2024-06-28 03:23:24,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4776, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5006, PETRI_PLACES=379, PETRI_TRANSITIONS=470} [2024-06-28 03:23:24,002 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-28 03:23:24,002 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 470 transitions, 5006 flow [2024-06-28 03:23:24,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:24,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:24,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:24,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-28 03:23:24,002 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:23:24,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:24,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1038427221, now seen corresponding path program 7 times [2024-06-28 03:23:24,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:24,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798649038] [2024-06-28 03:23:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:24,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:24,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:24,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798649038] [2024-06-28 03:23:24,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798649038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:24,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:24,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:23:24,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588580694] [2024-06-28 03:23:24,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:24,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:23:24,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:23:24,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:23:24,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:23:24,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 470 transitions, 5006 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:24,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:24,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:23:24,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:26,487 INFO L124 PetriNetUnfolderBase]: 4175/6844 cut-off events. [2024-06-28 03:23:26,488 INFO L125 PetriNetUnfolderBase]: For 2104264/2104266 co-relation queries the response was YES. [2024-06-28 03:23:26,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74852 conditions, 6844 events. 4175/6844 cut-off events. For 2104264/2104266 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 44580 event pairs, 943 based on Foata normal form. 4/6800 useless extension candidates. Maximal degree in co-relation 74669. Up to 6031 conditions per place. [2024-06-28 03:23:26,590 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 348 selfloop transitions, 106 changer transitions 0/493 dead transitions. [2024-06-28 03:23:26,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 493 transitions, 6729 flow [2024-06-28 03:23:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:23:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:23:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 03:23:26,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-28 03:23:26,591 INFO L175 Difference]: Start difference. First operand has 379 places, 470 transitions, 5006 flow. Second operand 8 states and 157 transitions. [2024-06-28 03:23:26,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 493 transitions, 6729 flow [2024-06-28 03:23:31,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 493 transitions, 6406 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-28 03:23:31,991 INFO L231 Difference]: Finished difference. Result has 379 places, 480 transitions, 5176 flow [2024-06-28 03:23:31,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4683, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5176, PETRI_PLACES=379, PETRI_TRANSITIONS=480} [2024-06-28 03:23:31,992 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-28 03:23:31,992 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 480 transitions, 5176 flow [2024-06-28 03:23:31,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:31,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:31,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:31,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-28 03:23:31,992 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:23:31,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:31,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1038426973, now seen corresponding path program 10 times [2024-06-28 03:23:31,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:31,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767250790] [2024-06-28 03:23:31,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:31,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:32,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:32,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:32,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767250790] [2024-06-28 03:23:32,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767250790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:32,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:32,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:23:32,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261726169] [2024-06-28 03:23:32,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:32,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:23:32,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:32,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:23:32,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:23:32,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:23:32,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 480 transitions, 5176 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:32,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:32,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:23:32,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:34,579 INFO L124 PetriNetUnfolderBase]: 4262/6976 cut-off events. [2024-06-28 03:23:34,579 INFO L125 PetriNetUnfolderBase]: For 2141009/2141011 co-relation queries the response was YES. [2024-06-28 03:23:34,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75195 conditions, 6976 events. 4262/6976 cut-off events. For 2141009/2141011 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 45207 event pairs, 979 based on Foata normal form. 4/6980 useless extension candidates. Maximal degree in co-relation 75011. Up to 6129 conditions per place. [2024-06-28 03:23:34,698 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 370 selfloop transitions, 95 changer transitions 0/501 dead transitions. [2024-06-28 03:23:34,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 501 transitions, 6994 flow [2024-06-28 03:23:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:23:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:23:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 03:23:34,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-28 03:23:34,700 INFO L175 Difference]: Start difference. First operand has 379 places, 480 transitions, 5176 flow. Second operand 8 states and 157 transitions. [2024-06-28 03:23:34,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 501 transitions, 6994 flow [2024-06-28 03:23:40,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 501 transitions, 6771 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-28 03:23:40,306 INFO L231 Difference]: Finished difference. Result has 383 places, 487 transitions, 5420 flow [2024-06-28 03:23:40,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4953, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5420, PETRI_PLACES=383, PETRI_TRANSITIONS=487} [2024-06-28 03:23:40,306 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-28 03:23:40,306 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 487 transitions, 5420 flow [2024-06-28 03:23:40,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:40,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:40,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:40,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-28 03:23:40,307 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:23:40,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash -325557985, now seen corresponding path program 8 times [2024-06-28 03:23:40,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:40,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585179606] [2024-06-28 03:23:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:40,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:41,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:41,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585179606] [2024-06-28 03:23:41,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585179606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:41,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:41,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:23:41,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045656470] [2024-06-28 03:23:41,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:41,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:23:41,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:41,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:23:41,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:23:41,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:23:41,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 487 transitions, 5420 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:41,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:41,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:23:41,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:42,843 INFO L124 PetriNetUnfolderBase]: 4182/6852 cut-off events. [2024-06-28 03:23:42,844 INFO L125 PetriNetUnfolderBase]: For 2153662/2153664 co-relation queries the response was YES. [2024-06-28 03:23:42,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74894 conditions, 6852 events. 4182/6852 cut-off events. For 2153662/2153664 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 44613 event pairs, 943 based on Foata normal form. 3/6807 useless extension candidates. Maximal degree in co-relation 74709. Up to 6039 conditions per place. [2024-06-28 03:23:42,964 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 342 selfloop transitions, 117 changer transitions 0/500 dead transitions. [2024-06-28 03:23:42,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 500 transitions, 6910 flow [2024-06-28 03:23:42,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:23:42,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:23:42,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:23:42,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-28 03:23:42,965 INFO L175 Difference]: Start difference. First operand has 383 places, 487 transitions, 5420 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:23:42,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 500 transitions, 6910 flow [2024-06-28 03:23:48,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 500 transitions, 6596 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-28 03:23:48,415 INFO L231 Difference]: Finished difference. Result has 386 places, 487 transitions, 5346 flow [2024-06-28 03:23:48,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5106, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5346, PETRI_PLACES=386, PETRI_TRANSITIONS=487} [2024-06-28 03:23:48,415 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-28 03:23:48,415 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 487 transitions, 5346 flow [2024-06-28 03:23:48,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:48,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:48,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:48,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-28 03:23:48,416 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:23:48,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:48,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2085005573, now seen corresponding path program 11 times [2024-06-28 03:23:48,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:48,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654515158] [2024-06-28 03:23:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:48,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:49,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:49,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654515158] [2024-06-28 03:23:49,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654515158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:49,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:49,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:23:49,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372823546] [2024-06-28 03:23:49,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:49,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:23:49,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:49,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:23:49,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:23:49,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:23:49,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 487 transitions, 5346 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:49,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:49,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:23:49,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:50,930 INFO L124 PetriNetUnfolderBase]: 4263/6978 cut-off events. [2024-06-28 03:23:50,931 INFO L125 PetriNetUnfolderBase]: For 2187472/2187474 co-relation queries the response was YES. [2024-06-28 03:23:51,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75521 conditions, 6978 events. 4263/6978 cut-off events. For 2187472/2187474 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 45286 event pairs, 978 based on Foata normal form. 3/6981 useless extension candidates. Maximal degree in co-relation 75335. Up to 6129 conditions per place. [2024-06-28 03:23:51,054 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 366 selfloop transitions, 104 changer transitions 0/506 dead transitions. [2024-06-28 03:23:51,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 506 transitions, 7122 flow [2024-06-28 03:23:51,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:23:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:23:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:23:51,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-28 03:23:51,054 INFO L175 Difference]: Start difference. First operand has 386 places, 487 transitions, 5346 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:23:51,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 506 transitions, 7122 flow [2024-06-28 03:23:56,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 506 transitions, 6711 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-28 03:23:56,670 INFO L231 Difference]: Finished difference. Result has 385 places, 493 transitions, 5411 flow [2024-06-28 03:23:56,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4935, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5411, PETRI_PLACES=385, PETRI_TRANSITIONS=493} [2024-06-28 03:23:56,670 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-28 03:23:56,671 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 493 transitions, 5411 flow [2024-06-28 03:23:56,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:56,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:23:56,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:23:56,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-28 03:23:56,671 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:23:56,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:23:56,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2084768423, now seen corresponding path program 12 times [2024-06-28 03:23:56,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:23:56,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531576369] [2024-06-28 03:23:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:23:56,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:23:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:23:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:23:57,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:23:57,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531576369] [2024-06-28 03:23:57,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531576369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:23:57,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:23:57,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:23:57,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95155216] [2024-06-28 03:23:57,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:23:57,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:23:57,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:23:57,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:23:57,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:23:57,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:23:57,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 493 transitions, 5411 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:23:57,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:23:57,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:23:57,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:23:59,117 INFO L124 PetriNetUnfolderBase]: 4259/6971 cut-off events. [2024-06-28 03:23:59,117 INFO L125 PetriNetUnfolderBase]: For 2210929/2210931 co-relation queries the response was YES. [2024-06-28 03:23:59,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75444 conditions, 6971 events. 4259/6971 cut-off events. For 2210929/2210931 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 45201 event pairs, 978 based on Foata normal form. 3/6974 useless extension candidates. Maximal degree in co-relation 75259. Up to 6126 conditions per place. [2024-06-28 03:23:59,229 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 363 selfloop transitions, 106 changer transitions 0/505 dead transitions. [2024-06-28 03:23:59,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 505 transitions, 6653 flow [2024-06-28 03:23:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:23:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:23:59,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:23:59,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-28 03:23:59,230 INFO L175 Difference]: Start difference. First operand has 385 places, 493 transitions, 5411 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:23:59,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 505 transitions, 6653 flow [2024-06-28 03:24:04,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 505 transitions, 6361 flow, removed 119 selfloop flow, removed 3 redundant places. [2024-06-28 03:24:04,732 INFO L231 Difference]: Finished difference. Result has 390 places, 493 transitions, 5337 flow [2024-06-28 03:24:04,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5119, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5337, PETRI_PLACES=390, PETRI_TRANSITIONS=493} [2024-06-28 03:24:04,732 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-28 03:24:04,733 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 493 transitions, 5337 flow [2024-06-28 03:24:04,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:04,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:04,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:04,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-28 03:24:04,733 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:24:04,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:04,733 INFO L85 PathProgramCache]: Analyzing trace with hash -502392835, now seen corresponding path program 9 times [2024-06-28 03:24:04,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:04,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104431336] [2024-06-28 03:24:04,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:04,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:05,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:05,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104431336] [2024-06-28 03:24:05,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104431336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:05,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:05,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:24:05,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452964234] [2024-06-28 03:24:05,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:05,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:24:05,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:05,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:24:05,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:24:05,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:24:05,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 493 transitions, 5337 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:05,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:05,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:24:05,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:07,213 INFO L124 PetriNetUnfolderBase]: 4176/6843 cut-off events. [2024-06-28 03:24:07,213 INFO L125 PetriNetUnfolderBase]: For 2217966/2217968 co-relation queries the response was YES. [2024-06-28 03:24:07,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74489 conditions, 6843 events. 4176/6843 cut-off events. For 2217966/2217968 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 44513 event pairs, 943 based on Foata normal form. 4/6799 useless extension candidates. Maximal degree in co-relation 74302. Up to 6033 conditions per place. [2024-06-28 03:24:07,333 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 359 selfloop transitions, 103 changer transitions 0/505 dead transitions. [2024-06-28 03:24:07,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 505 transitions, 6567 flow [2024-06-28 03:24:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:24:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:24:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-28 03:24:07,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-28 03:24:07,334 INFO L175 Difference]: Start difference. First operand has 390 places, 493 transitions, 5337 flow. Second operand 8 states and 156 transitions. [2024-06-28 03:24:07,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 505 transitions, 6567 flow [2024-06-28 03:24:13,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 505 transitions, 6297 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-28 03:24:13,371 INFO L231 Difference]: Finished difference. Result has 391 places, 493 transitions, 5282 flow [2024-06-28 03:24:13,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5067, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5282, PETRI_PLACES=391, PETRI_TRANSITIONS=493} [2024-06-28 03:24:13,371 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-28 03:24:13,371 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 493 transitions, 5282 flow [2024-06-28 03:24:13,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:13,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:13,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:13,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-28 03:24:13,372 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:24:13,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1216033971, now seen corresponding path program 10 times [2024-06-28 03:24:13,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:13,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643793119] [2024-06-28 03:24:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:13,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:14,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:14,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643793119] [2024-06-28 03:24:14,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643793119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:14,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:14,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:24:14,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91576489] [2024-06-28 03:24:14,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:14,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:24:14,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:14,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:24:14,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:24:14,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:24:14,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 493 transitions, 5282 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:14,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:14,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:24:14,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:15,947 INFO L124 PetriNetUnfolderBase]: 4181/6850 cut-off events. [2024-06-28 03:24:15,947 INFO L125 PetriNetUnfolderBase]: For 2239248/2239250 co-relation queries the response was YES. [2024-06-28 03:24:16,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74740 conditions, 6850 events. 4181/6850 cut-off events. For 2239248/2239250 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 44566 event pairs, 943 based on Foata normal form. 3/6805 useless extension candidates. Maximal degree in co-relation 74552. Up to 6037 conditions per place. [2024-06-28 03:24:16,050 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 344 selfloop transitions, 121 changer transitions 0/508 dead transitions. [2024-06-28 03:24:16,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 508 transitions, 6597 flow [2024-06-28 03:24:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:24:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:24:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:24:16,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-28 03:24:16,051 INFO L175 Difference]: Start difference. First operand has 391 places, 493 transitions, 5282 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:24:16,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 508 transitions, 6597 flow [2024-06-28 03:24:21,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 508 transitions, 6369 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-28 03:24:21,334 INFO L231 Difference]: Finished difference. Result has 392 places, 496 transitions, 5379 flow [2024-06-28 03:24:21,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5058, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5379, PETRI_PLACES=392, PETRI_TRANSITIONS=496} [2024-06-28 03:24:21,334 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-28 03:24:21,334 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 496 transitions, 5379 flow [2024-06-28 03:24:21,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:21,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:21,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:21,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-28 03:24:21,335 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:24:21,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:21,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2076693915, now seen corresponding path program 11 times [2024-06-28 03:24:21,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:21,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671073189] [2024-06-28 03:24:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:21,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:22,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671073189] [2024-06-28 03:24:22,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671073189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:22,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:22,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:24:22,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449446370] [2024-06-28 03:24:22,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:22,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:24:22,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:22,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:24:22,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:24:22,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:24:22,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 496 transitions, 5379 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:22,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:22,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:24:22,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:23,898 INFO L124 PetriNetUnfolderBase]: 4175/6844 cut-off events. [2024-06-28 03:24:23,898 INFO L125 PetriNetUnfolderBase]: For 2258081/2258083 co-relation queries the response was YES. [2024-06-28 03:24:23,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74641 conditions, 6844 events. 4175/6844 cut-off events. For 2258081/2258083 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 44548 event pairs, 944 based on Foata normal form. 4/6800 useless extension candidates. Maximal degree in co-relation 74452. Up to 6032 conditions per place. [2024-06-28 03:24:24,012 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 355 selfloop transitions, 110 changer transitions 0/508 dead transitions. [2024-06-28 03:24:24,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 508 transitions, 6619 flow [2024-06-28 03:24:24,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:24:24,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:24:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 03:24:24,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-28 03:24:24,013 INFO L175 Difference]: Start difference. First operand has 392 places, 496 transitions, 5379 flow. Second operand 8 states and 155 transitions. [2024-06-28 03:24:24,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 508 transitions, 6619 flow [2024-06-28 03:24:30,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 508 transitions, 6319 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-28 03:24:30,352 INFO L231 Difference]: Finished difference. Result has 395 places, 496 transitions, 5307 flow [2024-06-28 03:24:30,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5079, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5307, PETRI_PLACES=395, PETRI_TRANSITIONS=496} [2024-06-28 03:24:30,352 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-28 03:24:30,352 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 496 transitions, 5307 flow [2024-06-28 03:24:30,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:30,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:30,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:30,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-28 03:24:30,353 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:24:30,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:30,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1224077541, now seen corresponding path program 12 times [2024-06-28 03:24:30,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:30,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746726205] [2024-06-28 03:24:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:30,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:31,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746726205] [2024-06-28 03:24:31,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746726205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:31,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:31,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:24:31,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842541912] [2024-06-28 03:24:31,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:31,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:24:31,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:24:31,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:24:31,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:24:31,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 496 transitions, 5307 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:31,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:31,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:24:31,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:32,873 INFO L124 PetriNetUnfolderBase]: 4170/6836 cut-off events. [2024-06-28 03:24:32,873 INFO L125 PetriNetUnfolderBase]: For 2271237/2271239 co-relation queries the response was YES. [2024-06-28 03:24:32,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74562 conditions, 6836 events. 4170/6836 cut-off events. For 2271237/2271239 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 44506 event pairs, 943 based on Foata normal form. 3/6791 useless extension candidates. Maximal degree in co-relation 74372. Up to 6027 conditions per place. [2024-06-28 03:24:32,996 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 346 selfloop transitions, 118 changer transitions 0/507 dead transitions. [2024-06-28 03:24:32,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 507 transitions, 6263 flow [2024-06-28 03:24:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:24:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:24:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 03:24:32,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-28 03:24:32,997 INFO L175 Difference]: Start difference. First operand has 395 places, 496 transitions, 5307 flow. Second operand 8 states and 153 transitions. [2024-06-28 03:24:32,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 507 transitions, 6263 flow [2024-06-28 03:24:40,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 507 transitions, 5995 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-28 03:24:40,247 INFO L231 Difference]: Finished difference. Result has 397 places, 496 transitions, 5281 flow [2024-06-28 03:24:40,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5039, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5281, PETRI_PLACES=397, PETRI_TRANSITIONS=496} [2024-06-28 03:24:40,247 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 352 predicate places. [2024-06-28 03:24:40,247 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 496 transitions, 5281 flow [2024-06-28 03:24:40,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:24:40,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:40,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:40,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-28 03:24:40,248 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:24:40,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:40,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1038734803, now seen corresponding path program 2 times [2024-06-28 03:24:40,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:40,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492455291] [2024-06-28 03:24:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:40,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:41,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:41,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492455291] [2024-06-28 03:24:41,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492455291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:41,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:41,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:24:41,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762664343] [2024-06-28 03:24:41,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:41,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:24:41,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:24:41,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:24:41,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:24:41,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 496 transitions, 5281 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:24:41,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:41,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:24:41,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:42,826 INFO L124 PetriNetUnfolderBase]: 4175/6842 cut-off events. [2024-06-28 03:24:42,826 INFO L125 PetriNetUnfolderBase]: For 2303596/2303598 co-relation queries the response was YES. [2024-06-28 03:24:42,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74894 conditions, 6842 events. 4175/6842 cut-off events. For 2303596/2303598 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 44494 event pairs, 917 based on Foata normal form. 3/6797 useless extension candidates. Maximal degree in co-relation 74703. Up to 6251 conditions per place. [2024-06-28 03:24:42,943 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 424 selfloop transitions, 47 changer transitions 0/514 dead transitions. [2024-06-28 03:24:42,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 514 transitions, 6795 flow [2024-06-28 03:24:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:24:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:24:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:24:42,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-28 03:24:42,944 INFO L175 Difference]: Start difference. First operand has 397 places, 496 transitions, 5281 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:24:42,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 514 transitions, 6795 flow [2024-06-28 03:24:49,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 514 transitions, 6468 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-28 03:24:49,493 INFO L231 Difference]: Finished difference. Result has 396 places, 502 transitions, 5320 flow [2024-06-28 03:24:49,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4954, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5320, PETRI_PLACES=396, PETRI_TRANSITIONS=502} [2024-06-28 03:24:49,493 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 351 predicate places. [2024-06-28 03:24:49,493 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 502 transitions, 5320 flow [2024-06-28 03:24:49,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:24:49,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:49,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:49,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-28 03:24:49,493 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:24:49,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1038734307, now seen corresponding path program 5 times [2024-06-28 03:24:49,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:49,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76691156] [2024-06-28 03:24:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:49,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:24:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:24:50,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:24:50,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76691156] [2024-06-28 03:24:50,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76691156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:24:50,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:24:50,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:24:50,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015207390] [2024-06-28 03:24:50,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:24:50,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:24:50,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:24:50,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:24:50,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:24:50,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:24:50,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 502 transitions, 5320 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:24:50,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:24:50,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:24:50,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:24:52,231 INFO L124 PetriNetUnfolderBase]: 4211/6898 cut-off events. [2024-06-28 03:24:52,231 INFO L125 PetriNetUnfolderBase]: For 2381271/2381273 co-relation queries the response was YES. [2024-06-28 03:24:52,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76255 conditions, 6898 events. 4211/6898 cut-off events. For 2381271/2381273 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 44951 event pairs, 941 based on Foata normal form. 4/6854 useless extension candidates. Maximal degree in co-relation 76063. Up to 5922 conditions per place. [2024-06-28 03:24:52,350 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 372 selfloop transitions, 125 changer transitions 0/540 dead transitions. [2024-06-28 03:24:52,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 540 transitions, 7796 flow [2024-06-28 03:24:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:24:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:24:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:24:52,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-28 03:24:52,351 INFO L175 Difference]: Start difference. First operand has 396 places, 502 transitions, 5320 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:24:52,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 540 transitions, 7796 flow [2024-06-28 03:24:59,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 540 transitions, 7621 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-28 03:24:59,234 INFO L231 Difference]: Finished difference. Result has 402 places, 522 transitions, 5912 flow [2024-06-28 03:24:59,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5145, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5912, PETRI_PLACES=402, PETRI_TRANSITIONS=522} [2024-06-28 03:24:59,234 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-28 03:24:59,234 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 522 transitions, 5912 flow [2024-06-28 03:24:59,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:24:59,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:24:59,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:24:59,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-28 03:24:59,235 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:24:59,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:24:59,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1511101333, now seen corresponding path program 3 times [2024-06-28 03:24:59,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:24:59,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793908213] [2024-06-28 03:24:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:24:59,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:24:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:00,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:00,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793908213] [2024-06-28 03:25:00,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793908213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:00,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:00,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:00,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016105948] [2024-06-28 03:25:00,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:00,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:00,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:00,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:00,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:00,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:25:00,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 522 transitions, 5912 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:25:00,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:00,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:25:00,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:02,121 INFO L124 PetriNetUnfolderBase]: 4216/6902 cut-off events. [2024-06-28 03:25:02,121 INFO L125 PetriNetUnfolderBase]: For 2414149/2414149 co-relation queries the response was YES. [2024-06-28 03:25:02,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77709 conditions, 6902 events. 4216/6902 cut-off events. For 2414149/2414149 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 44926 event pairs, 910 based on Foata normal form. 1/6855 useless extension candidates. Maximal degree in co-relation 77513. Up to 6361 conditions per place. [2024-06-28 03:25:02,231 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 474 selfloop transitions, 20 changer transitions 0/537 dead transitions. [2024-06-28 03:25:02,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 537 transitions, 7053 flow [2024-06-28 03:25:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:25:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:25:02,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 03:25:02,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39646464646464646 [2024-06-28 03:25:02,232 INFO L175 Difference]: Start difference. First operand has 402 places, 522 transitions, 5912 flow. Second operand 9 states and 157 transitions. [2024-06-28 03:25:02,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 537 transitions, 7053 flow [2024-06-28 03:25:08,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 537 transitions, 6834 flow, removed 91 selfloop flow, removed 3 redundant places. [2024-06-28 03:25:08,739 INFO L231 Difference]: Finished difference. Result has 408 places, 525 transitions, 5867 flow [2024-06-28 03:25:08,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5693, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5867, PETRI_PLACES=408, PETRI_TRANSITIONS=525} [2024-06-28 03:25:08,739 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 363 predicate places. [2024-06-28 03:25:08,740 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 525 transitions, 5867 flow [2024-06-28 03:25:08,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:25:08,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:08,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:08,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-28 03:25:08,740 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:25:08,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:08,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1572617897, now seen corresponding path program 6 times [2024-06-28 03:25:08,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:08,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492107019] [2024-06-28 03:25:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:08,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:09,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:09,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492107019] [2024-06-28 03:25:09,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492107019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:09,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:09,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:09,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279032210] [2024-06-28 03:25:09,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:09,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:09,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:09,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:09,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:25:09,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 525 transitions, 5867 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:25:09,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:09,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:25:09,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:11,467 INFO L124 PetriNetUnfolderBase]: 4244/6949 cut-off events. [2024-06-28 03:25:11,468 INFO L125 PetriNetUnfolderBase]: For 2474554/2474556 co-relation queries the response was YES. [2024-06-28 03:25:11,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78462 conditions, 6949 events. 4244/6949 cut-off events. For 2474554/2474556 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 45279 event pairs, 935 based on Foata normal form. 4/6905 useless extension candidates. Maximal degree in co-relation 78264. Up to 5957 conditions per place. [2024-06-28 03:25:11,588 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 355 selfloop transitions, 151 changer transitions 0/549 dead transitions. [2024-06-28 03:25:11,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 549 transitions, 7885 flow [2024-06-28 03:25:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:25:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:25:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-28 03:25:11,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-28 03:25:11,589 INFO L175 Difference]: Start difference. First operand has 408 places, 525 transitions, 5867 flow. Second operand 9 states and 174 transitions. [2024-06-28 03:25:11,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 549 transitions, 7885 flow [2024-06-28 03:25:17,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 549 transitions, 7739 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-28 03:25:17,796 INFO L231 Difference]: Finished difference. Result has 411 places, 533 transitions, 6311 flow [2024-06-28 03:25:17,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5721, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6311, PETRI_PLACES=411, PETRI_TRANSITIONS=533} [2024-06-28 03:25:17,796 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 366 predicate places. [2024-06-28 03:25:17,796 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 533 transitions, 6311 flow [2024-06-28 03:25:17,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:25:17,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:17,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:17,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-28 03:25:17,797 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:25:17,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:17,797 INFO L85 PathProgramCache]: Analyzing trace with hash -502396369, now seen corresponding path program 7 times [2024-06-28 03:25:17,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:17,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694929722] [2024-06-28 03:25:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:17,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:18,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:18,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694929722] [2024-06-28 03:25:18,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694929722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:18,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:18,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:18,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856058394] [2024-06-28 03:25:18,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:18,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:18,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:18,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:18,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:18,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:25:18,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 533 transitions, 6311 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:25:18,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:18,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:25:18,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:20,677 INFO L124 PetriNetUnfolderBase]: 4254/6961 cut-off events. [2024-06-28 03:25:20,678 INFO L125 PetriNetUnfolderBase]: For 2512116/2512118 co-relation queries the response was YES. [2024-06-28 03:25:20,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79451 conditions, 6961 events. 4254/6961 cut-off events. For 2512116/2512118 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 45351 event pairs, 941 based on Foata normal form. 4/6917 useless extension candidates. Maximal degree in co-relation 79251. Up to 5967 conditions per place. [2024-06-28 03:25:20,800 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 377 selfloop transitions, 135 changer transitions 0/555 dead transitions. [2024-06-28 03:25:20,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 555 transitions, 8578 flow [2024-06-28 03:25:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:25:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:25:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 03:25:20,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-28 03:25:20,801 INFO L175 Difference]: Start difference. First operand has 411 places, 533 transitions, 6311 flow. Second operand 9 states and 178 transitions. [2024-06-28 03:25:20,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 555 transitions, 8578 flow [2024-06-28 03:25:28,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 555 transitions, 8192 flow, removed 81 selfloop flow, removed 5 redundant places. [2024-06-28 03:25:28,608 INFO L231 Difference]: Finished difference. Result has 415 places, 537 transitions, 6337 flow [2024-06-28 03:25:28,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6337, PETRI_PLACES=415, PETRI_TRANSITIONS=537} [2024-06-28 03:25:28,609 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 370 predicate places. [2024-06-28 03:25:28,609 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 537 transitions, 6337 flow [2024-06-28 03:25:28,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:25:28,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:28,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:28,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-28 03:25:28,609 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:25:28,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:28,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1038316737, now seen corresponding path program 8 times [2024-06-28 03:25:28,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:28,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587527546] [2024-06-28 03:25:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:28,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:29,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:29,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587527546] [2024-06-28 03:25:29,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587527546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:29,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:29,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:29,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034744637] [2024-06-28 03:25:29,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:29,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:29,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:29,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:29,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:29,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:25:29,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 537 transitions, 6337 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:25:29,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:29,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:25:29,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:31,604 INFO L124 PetriNetUnfolderBase]: 4264/6977 cut-off events. [2024-06-28 03:25:31,604 INFO L125 PetriNetUnfolderBase]: For 2541541/2541543 co-relation queries the response was YES. [2024-06-28 03:25:31,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79652 conditions, 6977 events. 4264/6977 cut-off events. For 2541541/2541543 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 45416 event pairs, 941 based on Foata normal form. 4/6933 useless extension candidates. Maximal degree in co-relation 79451. Up to 5980 conditions per place. [2024-06-28 03:25:31,731 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 362 selfloop transitions, 156 changer transitions 0/561 dead transitions. [2024-06-28 03:25:31,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 561 transitions, 8630 flow [2024-06-28 03:25:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:25:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:25:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:25:31,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-28 03:25:31,732 INFO L175 Difference]: Start difference. First operand has 415 places, 537 transitions, 6337 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:25:31,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 561 transitions, 8630 flow [2024-06-28 03:25:39,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 561 transitions, 8317 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-28 03:25:39,441 INFO L231 Difference]: Finished difference. Result has 420 places, 546 transitions, 6754 flow [2024-06-28 03:25:39,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6754, PETRI_PLACES=420, PETRI_TRANSITIONS=546} [2024-06-28 03:25:39,442 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 375 predicate places. [2024-06-28 03:25:39,442 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 546 transitions, 6754 flow [2024-06-28 03:25:39,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:25:39,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:39,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:39,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-28 03:25:39,442 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:25:39,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:39,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1511085523, now seen corresponding path program 4 times [2024-06-28 03:25:39,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:39,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433133228] [2024-06-28 03:25:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:39,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:40,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:40,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433133228] [2024-06-28 03:25:40,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433133228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:40,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:40,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:40,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769200042] [2024-06-28 03:25:40,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:40,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:40,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:40,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:40,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:40,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:25:40,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 546 transitions, 6754 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:25:40,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:40,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:25:40,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:42,473 INFO L124 PetriNetUnfolderBase]: 4269/6983 cut-off events. [2024-06-28 03:25:42,473 INFO L125 PetriNetUnfolderBase]: For 2573280/2573282 co-relation queries the response was YES. [2024-06-28 03:25:42,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80297 conditions, 6983 events. 4269/6983 cut-off events. For 2573280/2573282 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 45536 event pairs, 918 based on Foata normal form. 3/6938 useless extension candidates. Maximal degree in co-relation 80094. Up to 6380 conditions per place. [2024-06-28 03:25:42,611 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 462 selfloop transitions, 56 changer transitions 0/561 dead transitions. [2024-06-28 03:25:42,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 561 transitions, 8242 flow [2024-06-28 03:25:42,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:25:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:25:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:25:42,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-28 03:25:42,612 INFO L175 Difference]: Start difference. First operand has 420 places, 546 transitions, 6754 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:25:42,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 561 transitions, 8242 flow [2024-06-28 03:25:48,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 561 transitions, 8007 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-28 03:25:48,972 INFO L231 Difference]: Finished difference. Result has 425 places, 549 transitions, 6765 flow [2024-06-28 03:25:48,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6519, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6765, PETRI_PLACES=425, PETRI_TRANSITIONS=549} [2024-06-28 03:25:48,973 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-28 03:25:48,973 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 549 transitions, 6765 flow [2024-06-28 03:25:48,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:25:48,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:48,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:48,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-28 03:25:48,973 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:25:48,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:48,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1495430833, now seen corresponding path program 5 times [2024-06-28 03:25:48,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:48,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084209047] [2024-06-28 03:25:48,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:48,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:49,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:49,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084209047] [2024-06-28 03:25:49,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084209047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:49,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:49,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:49,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939395943] [2024-06-28 03:25:49,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:49,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:49,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:50,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:25:50,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 549 transitions, 6765 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:25:50,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:50,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:25:50,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:25:51,760 INFO L124 PetriNetUnfolderBase]: 4266/6977 cut-off events. [2024-06-28 03:25:51,760 INFO L125 PetriNetUnfolderBase]: For 2593720/2593722 co-relation queries the response was YES. [2024-06-28 03:25:51,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80085 conditions, 6977 events. 4266/6977 cut-off events. For 2593720/2593722 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 45478 event pairs, 917 based on Foata normal form. 3/6932 useless extension candidates. Maximal degree in co-relation 79880. Up to 6377 conditions per place. [2024-06-28 03:25:51,885 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 463 selfloop transitions, 54 changer transitions 0/560 dead transitions. [2024-06-28 03:25:51,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 560 transitions, 7825 flow [2024-06-28 03:25:51,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:25:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:25:51,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:25:51,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-28 03:25:51,886 INFO L175 Difference]: Start difference. First operand has 425 places, 549 transitions, 6765 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:25:51,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 560 transitions, 7825 flow [2024-06-28 03:25:58,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 560 transitions, 7511 flow, removed 115 selfloop flow, removed 6 redundant places. [2024-06-28 03:25:58,783 INFO L231 Difference]: Finished difference. Result has 428 places, 549 transitions, 6565 flow [2024-06-28 03:25:58,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6451, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6565, PETRI_PLACES=428, PETRI_TRANSITIONS=549} [2024-06-28 03:25:58,784 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-28 03:25:58,784 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 549 transitions, 6565 flow [2024-06-28 03:25:58,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:25:58,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:25:58,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:25:58,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-28 03:25:58,785 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:25:58,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:25:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1495416387, now seen corresponding path program 9 times [2024-06-28 03:25:58,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:25:58,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859115728] [2024-06-28 03:25:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:25:58,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:25:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:25:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:25:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:25:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859115728] [2024-06-28 03:25:59,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859115728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:25:59,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:25:59,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:25:59,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715587982] [2024-06-28 03:25:59,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:25:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:25:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:25:59,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:25:59,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:25:59,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:25:59,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 549 transitions, 6565 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:25:59,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:25:59,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:25:59,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:01,833 INFO L124 PetriNetUnfolderBase]: 4276/6996 cut-off events. [2024-06-28 03:26:01,833 INFO L125 PetriNetUnfolderBase]: For 2634071/2634073 co-relation queries the response was YES. [2024-06-28 03:26:01,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80260 conditions, 6996 events. 4276/6996 cut-off events. For 2634071/2634073 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 45598 event pairs, 941 based on Foata normal form. 4/6952 useless extension candidates. Maximal degree in co-relation 80054. Up to 5993 conditions per place. [2024-06-28 03:26:01,957 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 372 selfloop transitions, 153 changer transitions 0/568 dead transitions. [2024-06-28 03:26:01,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 568 transitions, 8676 flow [2024-06-28 03:26:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 03:26:01,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:26:01,958 INFO L175 Difference]: Start difference. First operand has 428 places, 549 transitions, 6565 flow. Second operand 9 states and 176 transitions. [2024-06-28 03:26:01,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 568 transitions, 8676 flow [2024-06-28 03:26:09,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 568 transitions, 8518 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-28 03:26:09,193 INFO L231 Difference]: Finished difference. Result has 428 places, 553 transitions, 6845 flow [2024-06-28 03:26:09,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6407, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6845, PETRI_PLACES=428, PETRI_TRANSITIONS=553} [2024-06-28 03:26:09,194 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-28 03:26:09,194 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 553 transitions, 6845 flow [2024-06-28 03:26:09,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:26:09,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:09,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:09,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-28 03:26:09,194 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:09,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:09,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1495430337, now seen corresponding path program 10 times [2024-06-28 03:26:09,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:09,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755812516] [2024-06-28 03:26:09,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:09,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:10,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:10,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755812516] [2024-06-28 03:26:10,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755812516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:10,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:10,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:10,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684937500] [2024-06-28 03:26:10,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:10,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:10,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:10,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:10,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:10,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:26:10,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 553 transitions, 6845 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:26:10,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:10,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:26:10,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:12,050 INFO L124 PetriNetUnfolderBase]: 4272/6992 cut-off events. [2024-06-28 03:26:12,051 INFO L125 PetriNetUnfolderBase]: For 2638028/2638030 co-relation queries the response was YES. [2024-06-28 03:26:12,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80314 conditions, 6992 events. 4272/6992 cut-off events. For 2638028/2638030 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 45597 event pairs, 941 based on Foata normal form. 4/6948 useless extension candidates. Maximal degree in co-relation 80107. Up to 5991 conditions per place. [2024-06-28 03:26:12,171 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 377 selfloop transitions, 148 changer transitions 0/568 dead transitions. [2024-06-28 03:26:12,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 568 transitions, 8837 flow [2024-06-28 03:26:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-28 03:26:12,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:26:12,172 INFO L175 Difference]: Start difference. First operand has 428 places, 553 transitions, 6845 flow. Second operand 9 states and 176 transitions. [2024-06-28 03:26:12,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 568 transitions, 8837 flow [2024-06-28 03:26:18,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 568 transitions, 8336 flow, removed 98 selfloop flow, removed 7 redundant places. [2024-06-28 03:26:18,840 INFO L231 Difference]: Finished difference. Result has 430 places, 553 transitions, 6648 flow [2024-06-28 03:26:18,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6344, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6648, PETRI_PLACES=430, PETRI_TRANSITIONS=553} [2024-06-28 03:26:18,840 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 385 predicate places. [2024-06-28 03:26:18,840 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 553 transitions, 6648 flow [2024-06-28 03:26:18,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:26:18,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:18,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:18,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-28 03:26:18,841 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:18,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:18,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1395409031, now seen corresponding path program 1 times [2024-06-28 03:26:18,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:18,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476568697] [2024-06-28 03:26:18,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:18,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:19,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:19,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476568697] [2024-06-28 03:26:19,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476568697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:19,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:19,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:19,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893923985] [2024-06-28 03:26:19,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:19,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:19,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:19,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-28 03:26:19,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 553 transitions, 6648 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:19,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:19,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-28 03:26:19,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:21,741 INFO L124 PetriNetUnfolderBase]: 4233/6989 cut-off events. [2024-06-28 03:26:21,741 INFO L125 PetriNetUnfolderBase]: For 2663767/2663767 co-relation queries the response was YES. [2024-06-28 03:26:21,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79992 conditions, 6989 events. 4233/6989 cut-off events. For 2663767/2663767 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 45934 event pairs, 880 based on Foata normal form. 1/6990 useless extension candidates. Maximal degree in co-relation 79784. Up to 6252 conditions per place. [2024-06-28 03:26:21,866 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 502 selfloop transitions, 20 changer transitions 0/580 dead transitions. [2024-06-28 03:26:21,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 580 transitions, 7865 flow [2024-06-28 03:26:21,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:21,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-28 03:26:21,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-28 03:26:21,867 INFO L175 Difference]: Start difference. First operand has 430 places, 553 transitions, 6648 flow. Second operand 9 states and 177 transitions. [2024-06-28 03:26:21,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 580 transitions, 7865 flow [2024-06-28 03:26:28,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 580 transitions, 7416 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-28 03:26:28,059 INFO L231 Difference]: Finished difference. Result has 429 places, 556 transitions, 6361 flow [2024-06-28 03:26:28,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6199, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6361, PETRI_PLACES=429, PETRI_TRANSITIONS=556} [2024-06-28 03:26:28,060 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 384 predicate places. [2024-06-28 03:26:28,060 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 556 transitions, 6361 flow [2024-06-28 03:26:28,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:26:28,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:28,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:28,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-28 03:26:28,061 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:28,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:28,062 INFO L85 PathProgramCache]: Analyzing trace with hash 94277013, now seen corresponding path program 1 times [2024-06-28 03:26:28,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:28,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046933369] [2024-06-28 03:26:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:28,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:28,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:28,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046933369] [2024-06-28 03:26:28,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046933369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:28,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:28,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:28,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168018202] [2024-06-28 03:26:28,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:28,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:28,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:28,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:28,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:29,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:26:29,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 556 transitions, 6361 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:26:29,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:29,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:26:29,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:31,042 INFO L124 PetriNetUnfolderBase]: 4340/7100 cut-off events. [2024-06-28 03:26:31,042 INFO L125 PetriNetUnfolderBase]: For 2703772/2703772 co-relation queries the response was YES. [2024-06-28 03:26:31,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80561 conditions, 7100 events. 4340/7100 cut-off events. For 2703772/2703772 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 46169 event pairs, 911 based on Foata normal form. 2/7102 useless extension candidates. Maximal degree in co-relation 80355. Up to 6531 conditions per place. [2024-06-28 03:26:31,163 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 536 selfloop transitions, 20 changer transitions 0/582 dead transitions. [2024-06-28 03:26:31,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 582 transitions, 7634 flow [2024-06-28 03:26:31,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:31,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:26:31,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-28 03:26:31,164 INFO L175 Difference]: Start difference. First operand has 429 places, 556 transitions, 6361 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:26:31,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 582 transitions, 7634 flow [2024-06-28 03:26:37,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 582 transitions, 7494 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-28 03:26:37,065 INFO L231 Difference]: Finished difference. Result has 431 places, 559 transitions, 6359 flow [2024-06-28 03:26:37,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6221, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6359, PETRI_PLACES=431, PETRI_TRANSITIONS=559} [2024-06-28 03:26:37,066 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 386 predicate places. [2024-06-28 03:26:37,066 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 559 transitions, 6359 flow [2024-06-28 03:26:37,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:26:37,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:37,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:37,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-28 03:26:37,066 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:37,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:37,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1712067105, now seen corresponding path program 2 times [2024-06-28 03:26:37,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:37,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906649971] [2024-06-28 03:26:37,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:37,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:37,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:37,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906649971] [2024-06-28 03:26:37,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906649971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:37,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:37,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:37,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105790894] [2024-06-28 03:26:37,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:37,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:37,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:37,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:37,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:38,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:26:38,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 559 transitions, 6359 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:26:38,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:38,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:26:38,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:39,953 INFO L124 PetriNetUnfolderBase]: 4366/7138 cut-off events. [2024-06-28 03:26:39,953 INFO L125 PetriNetUnfolderBase]: For 2766501/2766501 co-relation queries the response was YES. [2024-06-28 03:26:40,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81983 conditions, 7138 events. 4366/7138 cut-off events. For 2766501/2766501 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 46413 event pairs, 911 based on Foata normal form. 2/7140 useless extension candidates. Maximal degree in co-relation 81776. Up to 6538 conditions per place. [2024-06-28 03:26:40,098 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 528 selfloop transitions, 33 changer transitions 0/587 dead transitions. [2024-06-28 03:26:40,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 587 transitions, 8052 flow [2024-06-28 03:26:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 03:26:40,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-28 03:26:40,099 INFO L175 Difference]: Start difference. First operand has 431 places, 559 transitions, 6359 flow. Second operand 9 states and 170 transitions. [2024-06-28 03:26:40,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 587 transitions, 8052 flow [2024-06-28 03:26:46,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 587 transitions, 7936 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-28 03:26:46,570 INFO L231 Difference]: Finished difference. Result has 433 places, 565 transitions, 6505 flow [2024-06-28 03:26:46,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6243, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6505, PETRI_PLACES=433, PETRI_TRANSITIONS=565} [2024-06-28 03:26:46,570 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 388 predicate places. [2024-06-28 03:26:46,570 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 565 transitions, 6505 flow [2024-06-28 03:26:46,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:26:46,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:46,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:46,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-28 03:26:46,571 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:46,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:46,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1712067353, now seen corresponding path program 1 times [2024-06-28 03:26:46,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:46,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430801634] [2024-06-28 03:26:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:46,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:47,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:47,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430801634] [2024-06-28 03:26:47,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430801634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:47,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:47,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:47,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33049847] [2024-06-28 03:26:47,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:47,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:47,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:47,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:47,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:47,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:26:47,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 565 transitions, 6505 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:26:47,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:47,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:26:47,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:49,624 INFO L124 PetriNetUnfolderBase]: 4371/7147 cut-off events. [2024-06-28 03:26:49,624 INFO L125 PetriNetUnfolderBase]: For 2806170/2806170 co-relation queries the response was YES. [2024-06-28 03:26:49,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82727 conditions, 7147 events. 4371/7147 cut-off events. For 2806170/2806170 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46434 event pairs, 915 based on Foata normal form. 2/7149 useless extension candidates. Maximal degree in co-relation 82519. Up to 6588 conditions per place. [2024-06-28 03:26:49,741 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 540 selfloop transitions, 20 changer transitions 0/586 dead transitions. [2024-06-28 03:26:49,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 586 transitions, 7766 flow [2024-06-28 03:26:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:26:49,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116161616161616 [2024-06-28 03:26:49,742 INFO L175 Difference]: Start difference. First operand has 433 places, 565 transitions, 6505 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:26:49,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 586 transitions, 7766 flow [2024-06-28 03:26:56,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 586 transitions, 7642 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-28 03:26:56,508 INFO L231 Difference]: Finished difference. Result has 437 places, 568 transitions, 6527 flow [2024-06-28 03:26:56,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6381, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6527, PETRI_PLACES=437, PETRI_TRANSITIONS=568} [2024-06-28 03:26:56,508 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 392 predicate places. [2024-06-28 03:26:56,509 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 568 transitions, 6527 flow [2024-06-28 03:26:56,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:26:56,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:26:56,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:26:56,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-28 03:26:56,509 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:26:56,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:26:56,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1712060595, now seen corresponding path program 3 times [2024-06-28 03:26:56,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:26:56,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182974244] [2024-06-28 03:26:56,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:26:56,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:26:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:26:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:26:57,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:26:57,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182974244] [2024-06-28 03:26:57,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182974244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:26:57,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:26:57,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:26:57,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415454129] [2024-06-28 03:26:57,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:26:57,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:26:57,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:26:57,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:26:57,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:26:57,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:26:57,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 568 transitions, 6527 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:26:57,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:26:57,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:26:57,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:26:59,403 INFO L124 PetriNetUnfolderBase]: 4365/7139 cut-off events. [2024-06-28 03:26:59,403 INFO L125 PetriNetUnfolderBase]: For 2812226/2812226 co-relation queries the response was YES. [2024-06-28 03:26:59,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82689 conditions, 7139 events. 4365/7139 cut-off events. For 2812226/2812226 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 46411 event pairs, 912 based on Foata normal form. 2/7141 useless extension candidates. Maximal degree in co-relation 82479. Up to 6540 conditions per place. [2024-06-28 03:26:59,527 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 531 selfloop transitions, 32 changer transitions 0/589 dead transitions. [2024-06-28 03:26:59,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 589 transitions, 7730 flow [2024-06-28 03:26:59,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:26:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:26:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 03:26:59,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-28 03:26:59,528 INFO L175 Difference]: Start difference. First operand has 437 places, 568 transitions, 6527 flow. Second operand 9 states and 170 transitions. [2024-06-28 03:26:59,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 589 transitions, 7730 flow [2024-06-28 03:27:07,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 589 transitions, 7546 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-28 03:27:07,691 INFO L231 Difference]: Finished difference. Result has 439 places, 568 transitions, 6413 flow [2024-06-28 03:27:07,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6343, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6413, PETRI_PLACES=439, PETRI_TRANSITIONS=568} [2024-06-28 03:27:07,691 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 394 predicate places. [2024-06-28 03:27:07,691 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 568 transitions, 6413 flow [2024-06-28 03:27:07,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:27:07,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:07,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:07,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-28 03:27:07,692 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:07,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1884787883, now seen corresponding path program 2 times [2024-06-28 03:27:07,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:07,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151259943] [2024-06-28 03:27:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:07,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:08,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:08,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151259943] [2024-06-28 03:27:08,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151259943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:08,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:08,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:08,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697660884] [2024-06-28 03:27:08,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:08,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:08,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:08,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:08,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:08,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:27:08,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 568 transitions, 6413 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:27:08,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:08,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:27:08,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:10,626 INFO L124 PetriNetUnfolderBase]: 4397/7187 cut-off events. [2024-06-28 03:27:10,626 INFO L125 PetriNetUnfolderBase]: For 2898615/2898615 co-relation queries the response was YES. [2024-06-28 03:27:10,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84072 conditions, 7187 events. 4397/7187 cut-off events. For 2898615/2898615 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 46754 event pairs, 915 based on Foata normal form. 2/7189 useless extension candidates. Maximal degree in co-relation 83861. Up to 6587 conditions per place. [2024-06-28 03:27:11,109 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 524 selfloop transitions, 44 changer transitions 0/594 dead transitions. [2024-06-28 03:27:11,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 594 transitions, 8520 flow [2024-06-28 03:27:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 03:27:11,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-28 03:27:11,110 INFO L175 Difference]: Start difference. First operand has 439 places, 568 transitions, 6413 flow. Second operand 9 states and 167 transitions. [2024-06-28 03:27:11,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 594 transitions, 8520 flow [2024-06-28 03:27:18,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 594 transitions, 8434 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-28 03:27:18,679 INFO L231 Difference]: Finished difference. Result has 440 places, 577 transitions, 6727 flow [2024-06-28 03:27:18,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6327, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6727, PETRI_PLACES=440, PETRI_TRANSITIONS=577} [2024-06-28 03:27:18,680 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 395 predicate places. [2024-06-28 03:27:18,680 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 577 transitions, 6727 flow [2024-06-28 03:27:18,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:27:18,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:18,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:18,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-28 03:27:18,680 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:18,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:18,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1884787635, now seen corresponding path program 4 times [2024-06-28 03:27:18,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:18,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131711155] [2024-06-28 03:27:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:18,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:19,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:19,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131711155] [2024-06-28 03:27:19,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131711155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:19,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:19,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:19,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846302856] [2024-06-28 03:27:19,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:19,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:19,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:19,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:19,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:19,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:27:19,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 577 transitions, 6727 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:27:19,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:19,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:27:19,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:21,673 INFO L124 PetriNetUnfolderBase]: 4428/7232 cut-off events. [2024-06-28 03:27:21,673 INFO L125 PetriNetUnfolderBase]: For 2966932/2966932 co-relation queries the response was YES. [2024-06-28 03:27:21,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85510 conditions, 7232 events. 4428/7232 cut-off events. For 2966932/2966932 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 47007 event pairs, 911 based on Foata normal form. 2/7234 useless extension candidates. Maximal degree in co-relation 85298. Up to 6581 conditions per place. [2024-06-28 03:27:21,801 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 524 selfloop transitions, 52 changer transitions 0/602 dead transitions. [2024-06-28 03:27:21,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 602 transitions, 8470 flow [2024-06-28 03:27:21,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 03:27:21,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-28 03:27:21,802 INFO L175 Difference]: Start difference. First operand has 440 places, 577 transitions, 6727 flow. Second operand 9 states and 170 transitions. [2024-06-28 03:27:21,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 602 transitions, 8470 flow [2024-06-28 03:27:29,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 602 transitions, 8326 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-28 03:27:29,920 INFO L231 Difference]: Finished difference. Result has 445 places, 583 transitions, 6903 flow [2024-06-28 03:27:29,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6583, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6903, PETRI_PLACES=445, PETRI_TRANSITIONS=583} [2024-06-28 03:27:29,920 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 400 predicate places. [2024-06-28 03:27:29,920 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 583 transitions, 6903 flow [2024-06-28 03:27:29,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:27:29,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:29,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:29,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-28 03:27:29,921 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:29,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:29,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1884557243, now seen corresponding path program 3 times [2024-06-28 03:27:29,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:29,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267728757] [2024-06-28 03:27:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:29,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:30,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:30,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267728757] [2024-06-28 03:27:30,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267728757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:30,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:30,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:30,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957521582] [2024-06-28 03:27:30,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:30,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:30,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:30,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:31,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:27:31,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 583 transitions, 6903 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:27:31,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:31,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:27:31,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:33,319 INFO L124 PetriNetUnfolderBase]: 4422/7222 cut-off events. [2024-06-28 03:27:33,319 INFO L125 PetriNetUnfolderBase]: For 2981433/2981433 co-relation queries the response was YES. [2024-06-28 03:27:33,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85813 conditions, 7222 events. 4422/7222 cut-off events. For 2981433/2981433 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 46924 event pairs, 916 based on Foata normal form. 2/7224 useless extension candidates. Maximal degree in co-relation 85599. Up to 6622 conditions per place. [2024-06-28 03:27:33,453 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 530 selfloop transitions, 43 changer transitions 0/599 dead transitions. [2024-06-28 03:27:33,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 599 transitions, 8408 flow [2024-06-28 03:27:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 03:27:33,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-28 03:27:33,454 INFO L175 Difference]: Start difference. First operand has 445 places, 583 transitions, 6903 flow. Second operand 9 states and 167 transitions. [2024-06-28 03:27:33,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 599 transitions, 8408 flow [2024-06-28 03:27:41,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 599 transitions, 8216 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-28 03:27:41,680 INFO L231 Difference]: Finished difference. Result has 449 places, 583 transitions, 6803 flow [2024-06-28 03:27:41,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6711, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6803, PETRI_PLACES=449, PETRI_TRANSITIONS=583} [2024-06-28 03:27:41,680 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-28 03:27:41,681 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 583 transitions, 6803 flow [2024-06-28 03:27:41,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:27:41,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:41,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:41,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-28 03:27:41,681 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:41,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:41,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1452808573, now seen corresponding path program 5 times [2024-06-28 03:27:41,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:41,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16442530] [2024-06-28 03:27:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:41,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:42,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:42,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16442530] [2024-06-28 03:27:42,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16442530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:42,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:42,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:42,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207844361] [2024-06-28 03:27:42,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:42,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:42,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:42,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:27:42,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 583 transitions, 6803 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:27:42,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:42,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:27:42,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:44,945 INFO L124 PetriNetUnfolderBase]: 4427/7233 cut-off events. [2024-06-28 03:27:44,945 INFO L125 PetriNetUnfolderBase]: For 3016256/3016256 co-relation queries the response was YES. [2024-06-28 03:27:45,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86037 conditions, 7233 events. 4427/7233 cut-off events. For 3016256/3016256 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 47059 event pairs, 915 based on Foata normal form. 2/7235 useless extension candidates. Maximal degree in co-relation 85821. Up to 6579 conditions per place. [2024-06-28 03:27:45,175 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 526 selfloop transitions, 53 changer transitions 0/605 dead transitions. [2024-06-28 03:27:45,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 605 transitions, 8456 flow [2024-06-28 03:27:45,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:27:45,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-28 03:27:45,176 INFO L175 Difference]: Start difference. First operand has 449 places, 583 transitions, 6803 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:27:45,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 605 transitions, 8456 flow [2024-06-28 03:27:52,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 605 transitions, 8326 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-28 03:27:52,619 INFO L231 Difference]: Finished difference. Result has 450 places, 586 transitions, 6889 flow [2024-06-28 03:27:52,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6673, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6889, PETRI_PLACES=450, PETRI_TRANSITIONS=586} [2024-06-28 03:27:52,620 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 405 predicate places. [2024-06-28 03:27:52,620 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 586 transitions, 6889 flow [2024-06-28 03:27:52,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:27:52,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:27:52,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:27:52,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-28 03:27:52,620 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:27:52,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:27:52,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1884796253, now seen corresponding path program 4 times [2024-06-28 03:27:52,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:27:52,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764495521] [2024-06-28 03:27:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:27:52,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:27:52,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:27:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:27:53,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:27:53,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764495521] [2024-06-28 03:27:53,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764495521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:27:53,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:27:53,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:27:53,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259390329] [2024-06-28 03:27:53,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:27:53,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:27:53,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:27:53,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:27:53,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:27:53,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:27:53,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 586 transitions, 6889 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:27:53,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:27:53,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:27:53,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:27:55,930 INFO L124 PetriNetUnfolderBase]: 4421/7225 cut-off events. [2024-06-28 03:27:55,930 INFO L125 PetriNetUnfolderBase]: For 3026792/3026792 co-relation queries the response was YES. [2024-06-28 03:27:56,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85881 conditions, 7225 events. 4421/7225 cut-off events. For 3026792/3026792 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 47005 event pairs, 916 based on Foata normal form. 2/7227 useless extension candidates. Maximal degree in co-relation 85664. Up to 6627 conditions per place. [2024-06-28 03:27:56,063 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 529 selfloop transitions, 46 changer transitions 0/601 dead transitions. [2024-06-28 03:27:56,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 601 transitions, 8078 flow [2024-06-28 03:27:56,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:27:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:27:56,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:27:56,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-28 03:27:56,064 INFO L175 Difference]: Start difference. First operand has 450 places, 586 transitions, 6889 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:27:56,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 601 transitions, 8078 flow [2024-06-28 03:28:04,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 601 transitions, 7774 flow, removed 95 selfloop flow, removed 7 redundant places. [2024-06-28 03:28:04,495 INFO L231 Difference]: Finished difference. Result has 452 places, 586 transitions, 6684 flow [2024-06-28 03:28:04,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6585, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6684, PETRI_PLACES=452, PETRI_TRANSITIONS=586} [2024-06-28 03:28:04,495 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 407 predicate places. [2024-06-28 03:28:04,496 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 586 transitions, 6684 flow [2024-06-28 03:28:04,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:28:04,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:04,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:04,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-28 03:28:04,496 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:04,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:04,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1884556995, now seen corresponding path program 6 times [2024-06-28 03:28:04,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:04,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414077989] [2024-06-28 03:28:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:04,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:05,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:05,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414077989] [2024-06-28 03:28:05,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414077989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:05,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:05,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:28:05,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840510450] [2024-06-28 03:28:05,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:05,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:28:05,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:05,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:28:05,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:28:05,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:28:05,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 586 transitions, 6684 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:28:05,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:05,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:28:05,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:07,879 INFO L124 PetriNetUnfolderBase]: 4420/7222 cut-off events. [2024-06-28 03:28:07,879 INFO L125 PetriNetUnfolderBase]: For 3028593/3028593 co-relation queries the response was YES. [2024-06-28 03:28:07,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84809 conditions, 7222 events. 4420/7222 cut-off events. For 3028593/3028593 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 47045 event pairs, 913 based on Foata normal form. 2/7224 useless extension candidates. Maximal degree in co-relation 84592. Up to 6572 conditions per place. [2024-06-28 03:28:08,004 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 527 selfloop transitions, 52 changer transitions 0/605 dead transitions. [2024-06-28 03:28:08,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 605 transitions, 7921 flow [2024-06-28 03:28:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:28:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:28:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-28 03:28:08,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-28 03:28:08,005 INFO L175 Difference]: Start difference. First operand has 452 places, 586 transitions, 6684 flow. Second operand 9 states and 172 transitions. [2024-06-28 03:28:08,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 605 transitions, 7921 flow [2024-06-28 03:28:16,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 605 transitions, 7749 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-28 03:28:16,535 INFO L231 Difference]: Finished difference. Result has 453 places, 586 transitions, 6622 flow [2024-06-28 03:28:16,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6512, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6622, PETRI_PLACES=453, PETRI_TRANSITIONS=586} [2024-06-28 03:28:16,535 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 408 predicate places. [2024-06-28 03:28:16,535 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 586 transitions, 6622 flow [2024-06-28 03:28:16,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:28:16,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:16,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:16,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-28 03:28:16,535 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:16,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:16,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1216050525, now seen corresponding path program 5 times [2024-06-28 03:28:16,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:16,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246923528] [2024-06-28 03:28:16,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:16,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:17,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:17,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246923528] [2024-06-28 03:28:17,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246923528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:17,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:17,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:28:17,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978398780] [2024-06-28 03:28:17,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:17,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:28:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:17,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:28:17,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:28:17,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:28:17,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 586 transitions, 6622 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:28:17,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:17,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:28:17,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:19,710 INFO L124 PetriNetUnfolderBase]: 4441/7255 cut-off events. [2024-06-28 03:28:19,711 INFO L125 PetriNetUnfolderBase]: For 3092818/3092820 co-relation queries the response was YES. [2024-06-28 03:28:19,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85737 conditions, 7255 events. 4441/7255 cut-off events. For 3092818/3092820 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 47186 event pairs, 924 based on Foata normal form. 4/7259 useless extension candidates. Maximal degree in co-relation 85519. Up to 6581 conditions per place. [2024-06-28 03:28:19,835 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 502 selfloop transitions, 81 changer transitions 0/609 dead transitions. [2024-06-28 03:28:19,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 609 transitions, 8793 flow [2024-06-28 03:28:19,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:28:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:28:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 03:28:19,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-28 03:28:19,836 INFO L175 Difference]: Start difference. First operand has 453 places, 586 transitions, 6622 flow. Second operand 9 states and 170 transitions. [2024-06-28 03:28:19,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 609 transitions, 8793 flow [2024-06-28 03:28:29,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 609 transitions, 8653 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 03:28:29,314 INFO L231 Difference]: Finished difference. Result has 453 places, 595 transitions, 6975 flow [2024-06-28 03:28:29,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6482, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6975, PETRI_PLACES=453, PETRI_TRANSITIONS=595} [2024-06-28 03:28:29,314 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 408 predicate places. [2024-06-28 03:28:29,315 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 595 transitions, 6975 flow [2024-06-28 03:28:29,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:28:29,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:29,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:29,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-28 03:28:29,315 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:29,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:29,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1216042155, now seen corresponding path program 6 times [2024-06-28 03:28:29,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:29,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612383062] [2024-06-28 03:28:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:29,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:30,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:30,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612383062] [2024-06-28 03:28:30,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612383062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:30,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:30,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:28:30,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766518500] [2024-06-28 03:28:30,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:30,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:28:30,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:30,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:28:30,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:28:30,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:28:30,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 595 transitions, 6975 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:28:30,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:30,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:28:30,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:32,480 INFO L124 PetriNetUnfolderBase]: 4441/7259 cut-off events. [2024-06-28 03:28:32,480 INFO L125 PetriNetUnfolderBase]: For 3132582/3132584 co-relation queries the response was YES. [2024-06-28 03:28:32,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86293 conditions, 7259 events. 4441/7259 cut-off events. For 3132582/3132584 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 47235 event pairs, 925 based on Foata normal form. 4/7263 useless extension candidates. Maximal degree in co-relation 86074. Up to 6583 conditions per place. [2024-06-28 03:28:32,715 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 503 selfloop transitions, 83 changer transitions 0/612 dead transitions. [2024-06-28 03:28:32,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 612 transitions, 8950 flow [2024-06-28 03:28:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:28:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:28:32,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:28:32,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-28 03:28:32,716 INFO L175 Difference]: Start difference. First operand has 453 places, 595 transitions, 6975 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:28:32,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 612 transitions, 8950 flow [2024-06-28 03:28:41,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 612 transitions, 8688 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-28 03:28:41,553 INFO L231 Difference]: Finished difference. Result has 457 places, 598 transitions, 6997 flow [2024-06-28 03:28:41,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6737, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6997, PETRI_PLACES=457, PETRI_TRANSITIONS=598} [2024-06-28 03:28:41,553 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 412 predicate places. [2024-06-28 03:28:41,553 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 598 transitions, 6997 flow [2024-06-28 03:28:41,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:28:41,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:41,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:41,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-28 03:28:41,554 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:41,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1501141777, now seen corresponding path program 7 times [2024-06-28 03:28:41,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:41,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172266507] [2024-06-28 03:28:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:41,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:42,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:42,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172266507] [2024-06-28 03:28:42,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172266507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:42,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:42,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:28:42,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100174435] [2024-06-28 03:28:42,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:42,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:28:42,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:42,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:28:42,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:28:42,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:28:42,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 598 transitions, 6997 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:28:42,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:42,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:28:42,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:44,923 INFO L124 PetriNetUnfolderBase]: 4464/7293 cut-off events. [2024-06-28 03:28:44,923 INFO L125 PetriNetUnfolderBase]: For 3181632/3181634 co-relation queries the response was YES. [2024-06-28 03:28:45,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86714 conditions, 7293 events. 4464/7293 cut-off events. For 3181632/3181634 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 47486 event pairs, 923 based on Foata normal form. 2/7295 useless extension candidates. Maximal degree in co-relation 86494. Up to 6576 conditions per place. [2024-06-28 03:28:45,054 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 512 selfloop transitions, 82 changer transitions 0/620 dead transitions. [2024-06-28 03:28:45,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 620 transitions, 8782 flow [2024-06-28 03:28:45,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:28:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:28:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 03:28:45,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-28 03:28:45,055 INFO L175 Difference]: Start difference. First operand has 457 places, 598 transitions, 6997 flow. Second operand 9 states and 170 transitions. [2024-06-28 03:28:45,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 620 transitions, 8782 flow [2024-06-28 03:28:53,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 620 transitions, 8579 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-28 03:28:53,568 INFO L231 Difference]: Finished difference. Result has 461 places, 604 transitions, 7174 flow [2024-06-28 03:28:53,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6794, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7174, PETRI_PLACES=461, PETRI_TRANSITIONS=604} [2024-06-28 03:28:53,568 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 416 predicate places. [2024-06-28 03:28:53,568 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 604 transitions, 7174 flow [2024-06-28 03:28:53,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:28:53,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:28:53,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:28:53,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-28 03:28:53,569 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:28:53,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:28:53,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1216041907, now seen corresponding path program 8 times [2024-06-28 03:28:53,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:28:53,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134147579] [2024-06-28 03:28:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:28:53,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:28:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:28:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:28:54,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:28:54,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134147579] [2024-06-28 03:28:54,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134147579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:28:54,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:28:54,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:28:54,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678060552] [2024-06-28 03:28:54,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:28:54,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:28:54,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:28:54,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:28:54,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:28:54,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:28:54,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 604 transitions, 7174 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:28:54,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:28:54,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:28:54,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:28:56,781 INFO L124 PetriNetUnfolderBase]: 4469/7306 cut-off events. [2024-06-28 03:28:56,782 INFO L125 PetriNetUnfolderBase]: For 3224707/3224709 co-relation queries the response was YES. [2024-06-28 03:28:56,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87543 conditions, 7306 events. 4469/7306 cut-off events. For 3224707/3224709 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47678 event pairs, 930 based on Foata normal form. 2/7308 useless extension candidates. Maximal degree in co-relation 87322. Up to 6581 conditions per place. [2024-06-28 03:28:57,031 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 519 selfloop transitions, 79 changer transitions 0/624 dead transitions. [2024-06-28 03:28:57,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 624 transitions, 8883 flow [2024-06-28 03:28:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:28:57,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:28:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-28 03:28:57,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-28 03:28:57,032 INFO L175 Difference]: Start difference. First operand has 461 places, 604 transitions, 7174 flow. Second operand 9 states and 174 transitions. [2024-06-28 03:28:57,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 624 transitions, 8883 flow [2024-06-28 03:29:05,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 624 transitions, 8729 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-28 03:29:05,917 INFO L231 Difference]: Finished difference. Result has 465 places, 607 transitions, 7292 flow [2024-06-28 03:29:05,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7022, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7292, PETRI_PLACES=465, PETRI_TRANSITIONS=607} [2024-06-28 03:29:05,918 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 420 predicate places. [2024-06-28 03:29:05,918 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 607 transitions, 7292 flow [2024-06-28 03:29:05,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:29:05,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:05,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:05,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-28 03:29:05,918 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:05,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:05,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1215811267, now seen corresponding path program 9 times [2024-06-28 03:29:05,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:05,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037557432] [2024-06-28 03:29:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:05,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:06,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:06,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037557432] [2024-06-28 03:29:06,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037557432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:06,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:06,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:06,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148005360] [2024-06-28 03:29:06,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:06,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:06,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:06,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:06,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:07,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:29:07,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 607 transitions, 7292 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:29:07,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:07,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:29:07,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:09,213 INFO L124 PetriNetUnfolderBase]: 4484/7323 cut-off events. [2024-06-28 03:29:09,213 INFO L125 PetriNetUnfolderBase]: For 3258244/3258246 co-relation queries the response was YES. [2024-06-28 03:29:09,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87645 conditions, 7323 events. 4484/7323 cut-off events. For 3258244/3258246 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47739 event pairs, 928 based on Foata normal form. 2/7325 useless extension candidates. Maximal degree in co-relation 87422. Up to 6596 conditions per place. [2024-06-28 03:29:09,344 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 518 selfloop transitions, 83 changer transitions 0/627 dead transitions. [2024-06-28 03:29:09,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 627 transitions, 9013 flow [2024-06-28 03:29:09,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-28 03:29:09,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-28 03:29:09,345 INFO L175 Difference]: Start difference. First operand has 465 places, 607 transitions, 7292 flow. Second operand 9 states and 173 transitions. [2024-06-28 03:29:09,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 627 transitions, 9013 flow [2024-06-28 03:29:18,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 627 transitions, 8661 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-28 03:29:18,448 INFO L231 Difference]: Finished difference. Result has 466 places, 610 transitions, 7224 flow [2024-06-28 03:29:18,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6954, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7224, PETRI_PLACES=466, PETRI_TRANSITIONS=610} [2024-06-28 03:29:18,449 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 421 predicate places. [2024-06-28 03:29:18,449 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 610 transitions, 7224 flow [2024-06-28 03:29:18,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:29:18,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:18,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:18,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-28 03:29:18,449 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:18,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:18,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1215804757, now seen corresponding path program 10 times [2024-06-28 03:29:18,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:18,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637475754] [2024-06-28 03:29:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:18,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:19,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:19,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637475754] [2024-06-28 03:29:19,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637475754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:19,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:19,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:19,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44018947] [2024-06-28 03:29:19,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:19,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:19,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:19,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:19,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:29:19,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 610 transitions, 7224 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:29:19,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:19,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:29:19,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:21,648 INFO L124 PetriNetUnfolderBase]: 4473/7310 cut-off events. [2024-06-28 03:29:21,648 INFO L125 PetriNetUnfolderBase]: For 3264069/3264071 co-relation queries the response was YES. [2024-06-28 03:29:21,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86997 conditions, 7310 events. 4473/7310 cut-off events. For 3264069/3264071 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47695 event pairs, 929 based on Foata normal form. 2/7312 useless extension candidates. Maximal degree in co-relation 86774. Up to 6586 conditions per place. [2024-06-28 03:29:21,773 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 514 selfloop transitions, 85 changer transitions 0/625 dead transitions. [2024-06-28 03:29:21,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 625 transitions, 8483 flow [2024-06-28 03:29:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-28 03:29:21,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-28 03:29:21,774 INFO L175 Difference]: Start difference. First operand has 466 places, 610 transitions, 7224 flow. Second operand 9 states and 170 transitions. [2024-06-28 03:29:21,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 625 transitions, 8483 flow [2024-06-28 03:29:31,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 625 transitions, 8149 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-28 03:29:31,085 INFO L231 Difference]: Finished difference. Result has 468 places, 610 transitions, 7066 flow [2024-06-28 03:29:31,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6890, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7066, PETRI_PLACES=468, PETRI_TRANSITIONS=610} [2024-06-28 03:29:31,086 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 423 predicate places. [2024-06-28 03:29:31,086 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 610 transitions, 7066 flow [2024-06-28 03:29:31,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:29:31,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:31,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:31,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-28 03:29:31,086 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:31,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:31,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1303182001, now seen corresponding path program 7 times [2024-06-28 03:29:31,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:31,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249354678] [2024-06-28 03:29:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:31,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:32,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:32,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249354678] [2024-06-28 03:29:32,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249354678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:32,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:32,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:32,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694873422] [2024-06-28 03:29:32,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:32,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:32,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:32,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:32,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:32,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:29:32,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 610 transitions, 7066 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:29:32,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:32,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:29:32,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:34,293 INFO L124 PetriNetUnfolderBase]: 4467/7302 cut-off events. [2024-06-28 03:29:34,293 INFO L125 PetriNetUnfolderBase]: For 3269839/3269841 co-relation queries the response was YES. [2024-06-28 03:29:34,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86500 conditions, 7302 events. 4467/7302 cut-off events. For 3269839/3269841 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47617 event pairs, 926 based on Foata normal form. 4/7306 useless extension candidates. Maximal degree in co-relation 86276. Up to 6623 conditions per place. [2024-06-28 03:29:34,425 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 509 selfloop transitions, 88 changer transitions 0/623 dead transitions. [2024-06-28 03:29:34,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 623 transitions, 8631 flow [2024-06-28 03:29:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:29:34,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-28 03:29:34,426 INFO L175 Difference]: Start difference. First operand has 468 places, 610 transitions, 7066 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:29:34,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 623 transitions, 8631 flow [2024-06-28 03:29:44,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 623 transitions, 8379 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-28 03:29:44,614 INFO L231 Difference]: Finished difference. Result has 469 places, 610 transitions, 6996 flow [2024-06-28 03:29:44,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6814, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6996, PETRI_PLACES=469, PETRI_TRANSITIONS=610} [2024-06-28 03:29:44,614 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 424 predicate places. [2024-06-28 03:29:44,614 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 610 transitions, 6996 flow [2024-06-28 03:29:44,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:29:44,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:44,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:44,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-28 03:29:44,615 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:44,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:44,615 INFO L85 PathProgramCache]: Analyzing trace with hash -39974701, now seen corresponding path program 8 times [2024-06-28 03:29:44,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:44,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106872029] [2024-06-28 03:29:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:44,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:45,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:45,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106872029] [2024-06-28 03:29:45,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106872029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:45,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:45,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:45,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990711178] [2024-06-28 03:29:45,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:45,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:45,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:45,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:45,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:45,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:29:45,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 610 transitions, 6996 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:29:45,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:45,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:29:45,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:29:47,761 INFO L124 PetriNetUnfolderBase]: 4477/7316 cut-off events. [2024-06-28 03:29:47,762 INFO L125 PetriNetUnfolderBase]: For 3308645/3308647 co-relation queries the response was YES. [2024-06-28 03:29:47,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86825 conditions, 7316 events. 4477/7316 cut-off events. For 3308645/3308647 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47710 event pairs, 925 based on Foata normal form. 4/7320 useless extension candidates. Maximal degree in co-relation 86600. Up to 6633 conditions per place. [2024-06-28 03:29:48,006 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 509 selfloop transitions, 91 changer transitions 0/626 dead transitions. [2024-06-28 03:29:48,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 626 transitions, 8674 flow [2024-06-28 03:29:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:29:48,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:29:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-28 03:29:48,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-28 03:29:48,007 INFO L175 Difference]: Start difference. First operand has 469 places, 610 transitions, 6996 flow. Second operand 9 states and 167 transitions. [2024-06-28 03:29:48,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 626 transitions, 8674 flow [2024-06-28 03:29:58,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 626 transitions, 8480 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 03:29:58,880 INFO L231 Difference]: Finished difference. Result has 470 places, 613 transitions, 7095 flow [2024-06-28 03:29:58,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6811, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7095, PETRI_PLACES=470, PETRI_TRANSITIONS=613} [2024-06-28 03:29:58,880 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 425 predicate places. [2024-06-28 03:29:58,880 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 613 transitions, 7095 flow [2024-06-28 03:29:58,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:29:58,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:29:58,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:29:58,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-28 03:29:58,881 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:29:58,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:29:58,881 INFO L85 PathProgramCache]: Analyzing trace with hash -39966331, now seen corresponding path program 9 times [2024-06-28 03:29:58,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:29:58,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823946533] [2024-06-28 03:29:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:29:58,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:29:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:29:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:29:59,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:29:59,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823946533] [2024-06-28 03:29:59,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823946533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:29:59,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:29:59,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:29:59,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988124094] [2024-06-28 03:29:59,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:29:59,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:29:59,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:29:59,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:29:59,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:29:59,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:29:59,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 613 transitions, 7095 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:29:59,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:29:59,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:29:59,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:30:02,041 INFO L124 PetriNetUnfolderBase]: 4487/7330 cut-off events. [2024-06-28 03:30:02,042 INFO L125 PetriNetUnfolderBase]: For 3347887/3347889 co-relation queries the response was YES. [2024-06-28 03:30:02,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87245 conditions, 7330 events. 4487/7330 cut-off events. For 3347887/3347889 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 47789 event pairs, 925 based on Foata normal form. 4/7334 useless extension candidates. Maximal degree in co-relation 87019. Up to 6643 conditions per place. [2024-06-28 03:30:02,329 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 511 selfloop transitions, 92 changer transitions 0/629 dead transitions. [2024-06-28 03:30:02,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 629 transitions, 8778 flow [2024-06-28 03:30:02,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:30:02,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:30:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-28 03:30:02,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-28 03:30:02,331 INFO L175 Difference]: Start difference. First operand has 470 places, 613 transitions, 7095 flow. Second operand 9 states and 168 transitions. [2024-06-28 03:30:02,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 629 transitions, 8778 flow [2024-06-28 03:30:13,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 629 transitions, 8441 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-28 03:30:13,093 INFO L231 Difference]: Finished difference. Result has 470 places, 616 transitions, 7051 flow [2024-06-28 03:30:13,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6772, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7051, PETRI_PLACES=470, PETRI_TRANSITIONS=616} [2024-06-28 03:30:13,093 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 425 predicate places. [2024-06-28 03:30:13,093 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 616 transitions, 7051 flow [2024-06-28 03:30:13,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:30:13,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:30:13,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:30:13,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-28 03:30:13,094 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:30:13,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:30:13,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1511269725, now seen corresponding path program 10 times [2024-06-28 03:30:13,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:30:13,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638635808] [2024-06-28 03:30:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:30:13,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:30:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:30:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:30:14,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:30:14,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638635808] [2024-06-28 03:30:14,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638635808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:30:14,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:30:14,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:30:14,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962857954] [2024-06-28 03:30:14,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:30:14,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:30:14,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:30:14,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:30:14,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:30:14,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-28 03:30:14,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 616 transitions, 7051 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-28 03:30:14,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:30:14,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-28 03:30:14,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15