./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe019_power.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/safe019_power.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe019_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 04:18:25,550 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 04:18:25,617 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 04:18:25,621 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 04:18:25,622 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 04:18:25,645 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 04:18:25,646 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 04:18:25,647 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 04:18:25,647 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 04:18:25,651 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 04:18:25,651 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 04:18:25,651 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 04:18:25,652 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 04:18:25,653 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 04:18:25,653 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 04:18:25,654 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 04:18:25,654 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 04:18:25,654 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 04:18:25,654 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 04:18:25,655 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 04:18:25,655 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 04:18:25,655 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 04:18:25,655 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 04:18:25,656 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 04:18:25,656 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 04:18:25,656 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 04:18:25,656 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 04:18:25,656 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 04:18:25,657 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 04:18:25,657 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 04:18:25,658 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 04:18:25,658 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 04:18:25,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:18:25,658 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 04:18:25,659 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 04:18:25,659 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 04:18:25,659 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 04:18:25,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 04:18:25,659 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 04:18:25,660 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 04:18:25,660 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 04:18:25,660 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 04:18:25,660 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 04:18:25,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 04:18:25,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 04:18:25,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 04:18:25,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 04:18:25,904 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 04:18:25,905 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 04:18:25,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2024-06-28 04:18:27,007 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 04:18:27,263 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 04:18:27,266 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2024-06-28 04:18:27,282 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25abe4cb2/90d8ce2783d14dedbbea8294703fe58b/FLAGcd57fab7b [2024-06-28 04:18:27,292 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25abe4cb2/90d8ce2783d14dedbbea8294703fe58b [2024-06-28 04:18:27,294 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 04:18:27,295 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 04:18:27,295 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe019_power.opt.yml/witness.yml [2024-06-28 04:18:27,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 04:18:27,587 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 04:18:27,588 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 04:18:27,588 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 04:18:27,592 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 04:18:27,592 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:18:27" (1/2) ... [2024-06-28 04:18:27,593 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5daed4f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:18:27, skipping insertion in model container [2024-06-28 04:18:27,593 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 04:18:27" (1/2) ... [2024-06-28 04:18:27,595 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@72b3aafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 04:18:27, skipping insertion in model container [2024-06-28 04:18:27,595 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:18:27" (2/2) ... [2024-06-28 04:18:27,596 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5daed4f8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:18:27, skipping insertion in model container [2024-06-28 04:18:27,596 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:18:27" (2/2) ... [2024-06-28 04:18:27,596 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 04:18:27,734 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 04:18:27,735 INFO L97 edCorrectnessWitness]: Location invariant before [L885-L885] ((((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) [2024-06-28 04:18:27,735 INFO L97 edCorrectnessWitness]: Location invariant before [L889-L889] ((((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) [2024-06-28 04:18:27,735 INFO L97 edCorrectnessWitness]: Location invariant before [L887-L887] ((((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) [2024-06-28 04:18:27,736 INFO L97 edCorrectnessWitness]: Location invariant before [L890-L890] ((((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) [2024-06-28 04:18:27,736 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 04:18:27,736 INFO L106 edCorrectnessWitness]: ghost_update [L883-L883] multithreaded = 1; [2024-06-28 04:18:27,773 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 04:18:28,091 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:18:28,107 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 04:18:28,286 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 04:18:28,320 INFO L206 MainTranslator]: Completed translation [2024-06-28 04:18:28,321 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 04:18:28 WrapperNode [2024-06-28 04:18:28,321 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 04:18:28,322 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 04:18:28,322 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 04:18:28,322 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 04:18:28,327 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 04:18:28" (1/1) ... [2024-06-28 04:18:28,355 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 04:18:28" (1/1) ... [2024-06-28 04:18:28,403 INFO L138 Inliner]: procedures = 176, calls = 105, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 289 [2024-06-28 04:18:28,405 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 04:18:28,406 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 04:18:28,407 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 04:18:28,407 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 04:18:28,415 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 04:18:28" (1/1) ... [2024-06-28 04:18:28,415 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 04:18:28" (1/1) ... [2024-06-28 04:18:28,429 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 04:18:28" (1/1) ... [2024-06-28 04:18:28,461 INFO L175 MemorySlicer]: Split 58 memory accesses to 2 slices as follows [2, 56]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-28 04:18:28,461 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 04:18:28" (1/1) ... [2024-06-28 04:18:28,461 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 04:18:28" (1/1) ... [2024-06-28 04:18:28,477 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 04:18:28" (1/1) ... [2024-06-28 04:18:28,483 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 04:18:28" (1/1) ... [2024-06-28 04:18:28,488 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 04:18:28" (1/1) ... [2024-06-28 04:18:28,501 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 04:18:28" (1/1) ... [2024-06-28 04:18:28,506 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 04:18:28,508 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 04:18:28,509 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 04:18:28,509 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 04:18:28,509 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 04:18:28" (1/1) ... [2024-06-28 04:18:28,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 04:18:28,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 04:18:28,537 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 04:18:28,555 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 04:18:28,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 04:18:28,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 04:18:28,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 04:18:28,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 04:18:28,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 04:18:28,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 04:18:28,573 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 04:18:28,573 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 04:18:28,573 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 04:18:28,573 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 04:18:28,574 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 04:18:28,574 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 04:18:28,574 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-28 04:18:28,575 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-28 04:18:28,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 04:18:28,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 04:18:28,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 04:18:28,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 04:18:28,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 04:18:28,578 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 04:18:28,762 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 04:18:28,764 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 04:18:29,336 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 04:18:29,336 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 04:18:29,769 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 04:18:29,769 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 04:18:29,770 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:18:29 BoogieIcfgContainer [2024-06-28 04:18:29,770 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 04:18:29,772 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 04:18:29,772 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 04:18:29,775 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 04:18:29,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 04:18:27" (1/4) ... [2024-06-28 04:18:29,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e58250b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 04:18:29, skipping insertion in model container [2024-06-28 04:18:29,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 04:18:27" (2/4) ... [2024-06-28 04:18:29,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e58250b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:18:29, skipping insertion in model container [2024-06-28 04:18:29,776 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 04:18:28" (3/4) ... [2024-06-28 04:18:29,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e58250b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 04:18:29, skipping insertion in model container [2024-06-28 04:18:29,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 04:18:29" (4/4) ... [2024-06-28 04:18:29,778 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.opt.i [2024-06-28 04:18:29,793 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 04:18:29,793 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-28 04:18:29,793 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 04:18:29,873 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 04:18:29,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-28 04:18:29,935 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-28 04:18:29,935 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:18:29,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 04:18:29,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-28 04:18:29,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-28 04:18:29,950 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 04:18:29,956 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;@439b3024, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 04:18:29,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-28 04:18:29,961 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 04:18:29,961 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 04:18:29,961 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 04:18:29,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:29,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 04:18:29,962 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:18:29,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:29,968 INFO L85 PathProgramCache]: Analyzing trace with hash 992381459, now seen corresponding path program 1 times [2024-06-28 04:18:29,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:29,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124652695] [2024-06-28 04:18:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:29,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:31,800 INFO 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 04:18:31,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:31,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124652695] [2024-06-28 04:18:31,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124652695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:31,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:31,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 04:18:31,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256910170] [2024-06-28 04:18:31,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:31,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 04:18:31,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:31,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 04:18:31,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 04:18:31,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-28 04:18:31,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:31,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:31,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-28 04:18:31,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:33,700 INFO L124 PetriNetUnfolderBase]: 6711/9234 cut-off events. [2024-06-28 04:18:33,700 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-06-28 04:18:33,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18754 conditions, 9234 events. 6711/9234 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 48440 event pairs, 4089 based on Foata normal form. 2/9094 useless extension candidates. Maximal degree in co-relation 18741. Up to 9183 conditions per place. [2024-06-28 04:18:33,750 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 48 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-28 04:18:33,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 247 flow [2024-06-28 04:18:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 04:18:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 04:18:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-06-28 04:18:33,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-28 04:18:33,761 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 90 transitions. [2024-06-28 04:18:33,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 247 flow [2024-06-28 04:18:33,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 240 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 04:18:33,767 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-28 04:18:33,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-28 04:18:33,771 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-28 04:18:33,772 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-28 04:18:33,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:33,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:33,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:33,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 04:18:33,773 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:18:33,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:33,773 INFO L85 PathProgramCache]: Analyzing trace with hash -815477215, now seen corresponding path program 1 times [2024-06-28 04:18:33,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:33,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479154582] [2024-06-28 04:18:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:33,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:36,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:36,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479154582] [2024-06-28 04:18:36,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479154582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:36,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:36,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:18:36,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713518988] [2024-06-28 04:18:36,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:36,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:18:36,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:36,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:18:36,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:18:36,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:18:36,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:36,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:36,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:18:36,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:39,119 INFO L124 PetriNetUnfolderBase]: 8525/11670 cut-off events. [2024-06-28 04:18:39,120 INFO L125 PetriNetUnfolderBase]: For 2111/2111 co-relation queries the response was YES. [2024-06-28 04:18:39,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26842 conditions, 11670 events. 8525/11670 cut-off events. For 2111/2111 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59795 event pairs, 4020 based on Foata normal form. 8/11674 useless extension candidates. Maximal degree in co-relation 26830. Up to 11534 conditions per place. [2024-06-28 04:18:39,177 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 59 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2024-06-28 04:18:39,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 333 flow [2024-06-28 04:18:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 04:18:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 04:18:39,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-28 04:18:39,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336538461538461 [2024-06-28 04:18:39,183 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 111 transitions. [2024-06-28 04:18:39,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 333 flow [2024-06-28 04:18:39,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 04:18:39,190 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 166 flow [2024-06-28 04:18:39,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-28 04:18:39,191 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2024-06-28 04:18:39,191 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 166 flow [2024-06-28 04:18:39,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:39,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:39,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:39,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 04:18:39,197 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:18:39,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:39,197 INFO L85 PathProgramCache]: Analyzing trace with hash -579300484, now seen corresponding path program 1 times [2024-06-28 04:18:39,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:39,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119193837] [2024-06-28 04:18:39,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:39,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:40,882 INFO 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 04:18:40,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:40,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119193837] [2024-06-28 04:18:40,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119193837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:40,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:40,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:18:40,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109896561] [2024-06-28 04:18:40,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:40,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:18:40,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:40,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:18:40,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:18:40,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:18:40,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:40,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:40,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:18:40,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:42,751 INFO L124 PetriNetUnfolderBase]: 6713/9255 cut-off events. [2024-06-28 04:18:42,751 INFO L125 PetriNetUnfolderBase]: For 4637/4637 co-relation queries the response was YES. [2024-06-28 04:18:42,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23400 conditions, 9255 events. 6713/9255 cut-off events. For 4637/4637 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 48672 event pairs, 3676 based on Foata normal form. 6/9259 useless extension candidates. Maximal degree in co-relation 23385. Up to 9173 conditions per place. [2024-06-28 04:18:42,798 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 63 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-28 04:18:42,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 406 flow [2024-06-28 04:18:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:18:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:18:42,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-28 04:18:42,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576923076923077 [2024-06-28 04:18:42,802 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 166 flow. Second operand 5 states and 119 transitions. [2024-06-28 04:18:42,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 406 flow [2024-06-28 04:18:42,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 79 transitions, 382 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-28 04:18:42,807 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 232 flow [2024-06-28 04:18:42,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-28 04:18:42,809 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2024-06-28 04:18:42,809 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 232 flow [2024-06-28 04:18:42,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:42,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:42,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:42,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 04:18:42,810 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:18:42,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:42,810 INFO L85 PathProgramCache]: Analyzing trace with hash -778444326, now seen corresponding path program 1 times [2024-06-28 04:18:42,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:42,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913186446] [2024-06-28 04:18:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:42,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:18:44,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:44,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913186446] [2024-06-28 04:18:44,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913186446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:44,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:44,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:18:44,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681013309] [2024-06-28 04:18:44,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:44,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:18:44,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:44,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:18:44,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:18:45,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:18:45,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:45,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:45,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:18:45,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:46,698 INFO L124 PetriNetUnfolderBase]: 6704/9243 cut-off events. [2024-06-28 04:18:46,698 INFO L125 PetriNetUnfolderBase]: For 9305/9305 co-relation queries the response was YES. [2024-06-28 04:18:46,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26562 conditions, 9243 events. 6704/9243 cut-off events. For 9305/9305 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 48272 event pairs, 3546 based on Foata normal form. 3/9244 useless extension candidates. Maximal degree in co-relation 26544. Up to 9161 conditions per place. [2024-06-28 04:18:46,740 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 75 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-28 04:18:46,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 95 transitions, 535 flow [2024-06-28 04:18:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:18:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:18:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-28 04:18:46,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-28 04:18:46,742 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 232 flow. Second operand 6 states and 141 transitions. [2024-06-28 04:18:46,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 95 transitions, 535 flow [2024-06-28 04:18:46,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 504 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 04:18:46,745 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 308 flow [2024-06-28 04:18:46,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2024-06-28 04:18:46,746 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2024-06-28 04:18:46,746 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 308 flow [2024-06-28 04:18:46,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:46,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:46,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:46,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 04:18:46,747 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:18:46,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:46,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1638031195, now seen corresponding path program 1 times [2024-06-28 04:18:46,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:46,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287426651] [2024-06-28 04:18:46,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:46,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:49,797 INFO 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 04:18:49,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:49,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287426651] [2024-06-28 04:18:49,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287426651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:49,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:49,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:18:49,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350532516] [2024-06-28 04:18:49,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:49,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:18:49,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:49,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:18:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:18:49,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:18:49,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 308 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:49,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:49,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:18:49,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:52,100 INFO L124 PetriNetUnfolderBase]: 6916/9559 cut-off events. [2024-06-28 04:18:52,100 INFO L125 PetriNetUnfolderBase]: For 15470/15470 co-relation queries the response was YES. [2024-06-28 04:18:52,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30184 conditions, 9559 events. 6916/9559 cut-off events. For 15470/15470 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 50340 event pairs, 3427 based on Foata normal form. 39/9596 useless extension candidates. Maximal degree in co-relation 30163. Up to 9151 conditions per place. [2024-06-28 04:18:52,162 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 86 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-06-28 04:18:52,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 700 flow [2024-06-28 04:18:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:18:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:18:52,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-28 04:18:52,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527472527472525 [2024-06-28 04:18:52,165 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 308 flow. Second operand 7 states and 173 transitions. [2024-06-28 04:18:52,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 700 flow [2024-06-28 04:18:52,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 116 transitions, 677 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-28 04:18:52,172 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 428 flow [2024-06-28 04:18:52,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=428, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-28 04:18:52,173 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 16 predicate places. [2024-06-28 04:18:52,173 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 428 flow [2024-06-28 04:18:52,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:52,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:52,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:52,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 04:18:52,174 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:18:52,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:52,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1456850083, now seen corresponding path program 1 times [2024-06-28 04:18:52,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:52,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399373819] [2024-06-28 04:18:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:52,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:54,277 INFO 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 04:18:54,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:54,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399373819] [2024-06-28 04:18:54,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399373819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:54,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:54,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:18:54,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662063405] [2024-06-28 04:18:54,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:54,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:18:54,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:54,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:18:54,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:18:54,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:18:54,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 428 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:54,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:54,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:18:54,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:18:56,887 INFO L124 PetriNetUnfolderBase]: 8704/11952 cut-off events. [2024-06-28 04:18:56,887 INFO L125 PetriNetUnfolderBase]: For 33034/33034 co-relation queries the response was YES. [2024-06-28 04:18:56,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41764 conditions, 11952 events. 8704/11952 cut-off events. For 33034/33034 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61356 event pairs, 3942 based on Foata normal form. 3/11951 useless extension candidates. Maximal degree in co-relation 41740. Up to 11774 conditions per place. [2024-06-28 04:18:56,942 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 74 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-06-28 04:18:56,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 710 flow [2024-06-28 04:18:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:18:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:18:56,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-28 04:18:56,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-28 04:18:56,944 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 428 flow. Second operand 5 states and 118 transitions. [2024-06-28 04:18:56,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 710 flow [2024-06-28 04:18:56,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 671 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 04:18:56,972 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 492 flow [2024-06-28 04:18:56,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=492, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-28 04:18:56,973 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-28 04:18:56,973 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 492 flow [2024-06-28 04:18:56,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:18:56,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:18:56,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:18:56,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 04:18:56,974 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:18:56,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:18:56,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1077609035, now seen corresponding path program 1 times [2024-06-28 04:18:56,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:18:56,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360469730] [2024-06-28 04:18:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:18:56,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:18:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:18:59,411 INFO 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 04:18:59,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:18:59,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360469730] [2024-06-28 04:18:59,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360469730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:18:59,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:18:59,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:18:59,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392757461] [2024-06-28 04:18:59,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:18:59,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:18:59,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:18:59,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:18:59,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:18:59,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:18:59,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 492 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 04:18:59,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:18:59,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:18:59,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:01,748 INFO L124 PetriNetUnfolderBase]: 8731/11999 cut-off events. [2024-06-28 04:19:01,748 INFO L125 PetriNetUnfolderBase]: For 43216/43216 co-relation queries the response was YES. [2024-06-28 04:19:01,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44902 conditions, 11999 events. 8731/11999 cut-off events. For 43216/43216 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61623 event pairs, 3812 based on Foata normal form. 3/11998 useless extension candidates. Maximal degree in co-relation 44876. Up to 11763 conditions per place. [2024-06-28 04:19:01,828 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 83 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-28 04:19:01,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 113 transitions, 834 flow [2024-06-28 04:19:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:19:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:19:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-28 04:19:01,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-28 04:19:01,830 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 492 flow. Second operand 6 states and 142 transitions. [2024-06-28 04:19:01,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 113 transitions, 834 flow [2024-06-28 04:19:01,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 113 transitions, 791 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-28 04:19:01,866 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 567 flow [2024-06-28 04:19:01,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=567, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-28 04:19:01,866 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-28 04:19:01,866 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 567 flow [2024-06-28 04:19:01,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 04:19:01,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:01,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:01,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 04:19:01,867 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:01,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:01,868 INFO L85 PathProgramCache]: Analyzing trace with hash 2086013827, now seen corresponding path program 2 times [2024-06-28 04:19:01,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:01,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035447904] [2024-06-28 04:19:01,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:01,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:05,005 INFO 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 04:19:05,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:05,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035447904] [2024-06-28 04:19:05,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035447904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:05,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:05,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:05,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096839923] [2024-06-28 04:19:05,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:05,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:05,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:05,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:05,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:05,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:19:05,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 567 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 04:19:05,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:05,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:19:05,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:07,692 INFO L124 PetriNetUnfolderBase]: 8722/11995 cut-off events. [2024-06-28 04:19:07,693 INFO L125 PetriNetUnfolderBase]: For 56777/56784 co-relation queries the response was YES. [2024-06-28 04:19:07,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47851 conditions, 11995 events. 8722/11995 cut-off events. For 56777/56784 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 62184 event pairs, 3799 based on Foata normal form. 9/12002 useless extension candidates. Maximal degree in co-relation 47824. Up to 11759 conditions per place. [2024-06-28 04:19:07,759 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 104 selfloop transitions, 26 changer transitions 0/135 dead transitions. [2024-06-28 04:19:07,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 135 transitions, 1005 flow [2024-06-28 04:19:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:19:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:19:07,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-28 04:19:07,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-28 04:19:07,761 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 567 flow. Second operand 8 states and 184 transitions. [2024-06-28 04:19:07,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 135 transitions, 1005 flow [2024-06-28 04:19:07,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 135 transitions, 940 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 04:19:07,799 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 625 flow [2024-06-28 04:19:07,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=625, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-28 04:19:07,799 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-28 04:19:07,800 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 625 flow [2024-06-28 04:19:07,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 04:19:07,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:07,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:07,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 04:19:07,800 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:07,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:07,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1085426899, now seen corresponding path program 1 times [2024-06-28 04:19:07,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:07,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593112795] [2024-06-28 04:19:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:07,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:09,692 INFO 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 04:19:09,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:09,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593112795] [2024-06-28 04:19:09,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593112795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:09,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:09,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 04:19:09,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932178440] [2024-06-28 04:19:09,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:09,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 04:19:09,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:09,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 04:19:09,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 04:19:09,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:19:09,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 625 flow. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:09,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:09,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:19:09,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:11,891 INFO L124 PetriNetUnfolderBase]: 6911/9554 cut-off events. [2024-06-28 04:19:11,891 INFO L125 PetriNetUnfolderBase]: For 58817/58817 co-relation queries the response was YES. [2024-06-28 04:19:11,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41803 conditions, 9554 events. 6911/9554 cut-off events. For 58817/58817 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 50115 event pairs, 3262 based on Foata normal form. 4/9554 useless extension candidates. Maximal degree in co-relation 41775. Up to 9455 conditions per place. [2024-06-28 04:19:11,947 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 87 selfloop transitions, 13 changer transitions 0/106 dead transitions. [2024-06-28 04:19:11,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 106 transitions, 917 flow [2024-06-28 04:19:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 04:19:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 04:19:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-28 04:19:11,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-28 04:19:11,949 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 625 flow. Second operand 5 states and 115 transitions. [2024-06-28 04:19:11,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 106 transitions, 917 flow [2024-06-28 04:19:11,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 106 transitions, 812 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-28 04:19:11,973 INFO L231 Difference]: Finished difference. Result has 78 places, 87 transitions, 604 flow [2024-06-28 04:19:11,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=604, PETRI_PLACES=78, PETRI_TRANSITIONS=87} [2024-06-28 04:19:11,974 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 23 predicate places. [2024-06-28 04:19:11,974 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 87 transitions, 604 flow [2024-06-28 04:19:11,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:11,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:11,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:11,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 04:19:11,975 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:11,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:11,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1557101458, now seen corresponding path program 1 times [2024-06-28 04:19:11,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:11,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168357993] [2024-06-28 04:19:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:11,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:14,187 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 04:19:14,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:14,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168357993] [2024-06-28 04:19:14,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168357993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:14,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:14,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:14,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054024185] [2024-06-28 04:19:14,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:14,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:14,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:14,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:14,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:14,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:19:14,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 87 transitions, 604 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 04:19:14,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:14,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:19:14,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:16,664 INFO L124 PetriNetUnfolderBase]: 8745/12024 cut-off events. [2024-06-28 04:19:16,664 INFO L125 PetriNetUnfolderBase]: For 82660/82660 co-relation queries the response was YES. [2024-06-28 04:19:16,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53481 conditions, 12024 events. 8745/12024 cut-off events. For 82660/82660 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61878 event pairs, 2892 based on Foata normal form. 6/12026 useless extension candidates. Maximal degree in co-relation 53453. Up to 11820 conditions per place. [2024-06-28 04:19:16,741 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 104 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2024-06-28 04:19:16,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 124 transitions, 968 flow [2024-06-28 04:19:16,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:19:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:19:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-28 04:19:16,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-28 04:19:16,743 INFO L175 Difference]: Start difference. First operand has 78 places, 87 transitions, 604 flow. Second operand 6 states and 138 transitions. [2024-06-28 04:19:16,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 124 transitions, 968 flow [2024-06-28 04:19:16,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 916 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 04:19:16,795 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 642 flow [2024-06-28 04:19:16,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=642, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-28 04:19:16,795 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-28 04:19:16,796 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 642 flow [2024-06-28 04:19:16,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 04:19:16,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:16,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:16,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 04:19:16,796 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:16,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:16,797 INFO L85 PathProgramCache]: Analyzing trace with hash 953854848, now seen corresponding path program 2 times [2024-06-28 04:19:16,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:16,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786294932] [2024-06-28 04:19:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:16,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:19,124 INFO 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 04:19:19,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:19,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786294932] [2024-06-28 04:19:19,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786294932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:19,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:19,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:19:19,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125026620] [2024-06-28 04:19:19,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:19,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:19:19,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:19,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:19:19,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:19:19,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:19:19,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 642 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 04:19:19,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:19,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:19:19,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:21,641 INFO L124 PetriNetUnfolderBase]: 8730/12003 cut-off events. [2024-06-28 04:19:21,641 INFO L125 PetriNetUnfolderBase]: For 96021/96021 co-relation queries the response was YES. [2024-06-28 04:19:21,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55516 conditions, 12003 events. 8730/12003 cut-off events. For 96021/96021 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61850 event pairs, 3498 based on Foata normal form. 6/12005 useless extension candidates. Maximal degree in co-relation 55487. Up to 11739 conditions per place. [2024-06-28 04:19:21,717 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 99 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-06-28 04:19:21,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 129 transitions, 1044 flow [2024-06-28 04:19:21,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:19:21,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:19:21,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-28 04:19:21,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-28 04:19:21,719 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 642 flow. Second operand 6 states and 140 transitions. [2024-06-28 04:19:21,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 129 transitions, 1044 flow [2024-06-28 04:19:21,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 129 transitions, 980 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 04:19:21,765 INFO L231 Difference]: Finished difference. Result has 83 places, 95 transitions, 723 flow [2024-06-28 04:19:21,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=723, PETRI_PLACES=83, PETRI_TRANSITIONS=95} [2024-06-28 04:19:21,766 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 28 predicate places. [2024-06-28 04:19:21,766 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 95 transitions, 723 flow [2024-06-28 04:19:21,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 04:19:21,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:21,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:21,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 04:19:21,767 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:21,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1928120358, now seen corresponding path program 1 times [2024-06-28 04:19:21,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:21,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208566642] [2024-06-28 04:19:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:21,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:24,628 INFO 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 04:19:24,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:24,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208566642] [2024-06-28 04:19:24,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208566642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:24,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:24,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:24,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268918761] [2024-06-28 04:19:24,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:24,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:24,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:24,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:24,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:24,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:19:24,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 95 transitions, 723 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 04:19:24,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:24,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:19:24,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:27,126 INFO L124 PetriNetUnfolderBase]: 8886/12259 cut-off events. [2024-06-28 04:19:27,126 INFO L125 PetriNetUnfolderBase]: For 118272/118272 co-relation queries the response was YES. [2024-06-28 04:19:27,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59207 conditions, 12259 events. 8886/12259 cut-off events. For 118272/118272 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 63555 event pairs, 3143 based on Foata normal form. 24/12279 useless extension candidates. Maximal degree in co-relation 59177. Up to 11369 conditions per place. [2024-06-28 04:19:27,206 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 99 selfloop transitions, 41 changer transitions 0/145 dead transitions. [2024-06-28 04:19:27,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 145 transitions, 1185 flow [2024-06-28 04:19:27,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:19:27,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:19:27,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-28 04:19:27,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 04:19:27,208 INFO L175 Difference]: Start difference. First operand has 83 places, 95 transitions, 723 flow. Second operand 7 states and 169 transitions. [2024-06-28 04:19:27,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 145 transitions, 1185 flow [2024-06-28 04:19:27,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 145 transitions, 1090 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-28 04:19:27,266 INFO L231 Difference]: Finished difference. Result has 86 places, 97 transitions, 782 flow [2024-06-28 04:19:27,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=782, PETRI_PLACES=86, PETRI_TRANSITIONS=97} [2024-06-28 04:19:27,267 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-28 04:19:27,267 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 97 transitions, 782 flow [2024-06-28 04:19:27,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 04:19:27,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:27,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:27,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 04:19:27,268 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:27,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:27,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1094855302, now seen corresponding path program 2 times [2024-06-28 04:19:27,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:27,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977301233] [2024-06-28 04:19:27,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:27,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:30,314 INFO 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 04:19:30,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:30,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977301233] [2024-06-28 04:19:30,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977301233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:30,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:30,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:30,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226295255] [2024-06-28 04:19:30,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:30,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:30,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:30,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:30,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:30,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:19:30,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 97 transitions, 782 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 04:19:30,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:30,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:19:30,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:32,959 INFO L124 PetriNetUnfolderBase]: 9261/12840 cut-off events. [2024-06-28 04:19:32,960 INFO L125 PetriNetUnfolderBase]: For 140236/140243 co-relation queries the response was YES. [2024-06-28 04:19:32,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64450 conditions, 12840 events. 9261/12840 cut-off events. For 140236/140243 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 67366 event pairs, 3306 based on Foata normal form. 24/12862 useless extension candidates. Maximal degree in co-relation 64419. Up to 11868 conditions per place. [2024-06-28 04:19:33,048 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 128 selfloop transitions, 34 changer transitions 0/167 dead transitions. [2024-06-28 04:19:33,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 167 transitions, 1502 flow [2024-06-28 04:19:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:19:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:19:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-28 04:19:33,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-28 04:19:33,051 INFO L175 Difference]: Start difference. First operand has 86 places, 97 transitions, 782 flow. Second operand 8 states and 194 transitions. [2024-06-28 04:19:33,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 167 transitions, 1502 flow [2024-06-28 04:19:33,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 167 transitions, 1426 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 04:19:33,140 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 943 flow [2024-06-28 04:19:33,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2024-06-28 04:19:33,141 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 35 predicate places. [2024-06-28 04:19:33,141 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 943 flow [2024-06-28 04:19:33,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 04:19:33,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:33,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:33,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 04:19:33,142 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:33,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:33,142 INFO L85 PathProgramCache]: Analyzing trace with hash 241920722, now seen corresponding path program 3 times [2024-06-28 04:19:33,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:33,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618500948] [2024-06-28 04:19:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:33,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:35,940 INFO 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 04:19:35,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:35,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618500948] [2024-06-28 04:19:35,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618500948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:35,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:35,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:35,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420519677] [2024-06-28 04:19:35,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:35,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:35,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:35,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:35,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:36,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:19:36,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 943 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 04:19:36,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:36,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:19:36,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:38,747 INFO L124 PetriNetUnfolderBase]: 9207/12754 cut-off events. [2024-06-28 04:19:38,747 INFO L125 PetriNetUnfolderBase]: For 156348/156348 co-relation queries the response was YES. [2024-06-28 04:19:38,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65472 conditions, 12754 events. 9207/12754 cut-off events. For 156348/156348 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 66896 event pairs, 3559 based on Foata normal form. 24/12774 useless extension candidates. Maximal degree in co-relation 65439. Up to 12249 conditions per place. [2024-06-28 04:19:38,872 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 117 selfloop transitions, 38 changer transitions 0/160 dead transitions. [2024-06-28 04:19:38,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 160 transitions, 1409 flow [2024-06-28 04:19:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:19:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:19:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-28 04:19:38,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-28 04:19:38,875 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 943 flow. Second operand 8 states and 188 transitions. [2024-06-28 04:19:38,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 160 transitions, 1409 flow [2024-06-28 04:19:39,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 160 transitions, 1349 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 04:19:39,020 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 969 flow [2024-06-28 04:19:39,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=969, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-28 04:19:39,020 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-28 04:19:39,021 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 969 flow [2024-06-28 04:19:39,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 04:19:39,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:39,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:19:39,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 04:19:39,021 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:39,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:39,022 INFO L85 PathProgramCache]: Analyzing trace with hash 690951438, now seen corresponding path program 1 times [2024-06-28 04:19:39,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:39,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712952259] [2024-06-28 04:19:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:39,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:41,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:41,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712952259] [2024-06-28 04:19:41,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712952259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:41,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:41,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:19:41,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244214511] [2024-06-28 04:19:41,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:41,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:19:41,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:41,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:19:41,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:19:41,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:19:41,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 969 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:41,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:41,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:19:41,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:43,924 INFO L124 PetriNetUnfolderBase]: 9233/12793 cut-off events. [2024-06-28 04:19:43,924 INFO L125 PetriNetUnfolderBase]: For 162159/162159 co-relation queries the response was YES. [2024-06-28 04:19:43,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66299 conditions, 12793 events. 9233/12793 cut-off events. For 162159/162159 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67158 event pairs, 3519 based on Foata normal form. 8/12800 useless extension candidates. Maximal degree in co-relation 66264. Up to 12617 conditions per place. [2024-06-28 04:19:44,014 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 129 selfloop transitions, 20 changer transitions 0/154 dead transitions. [2024-06-28 04:19:44,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 154 transitions, 1543 flow [2024-06-28 04:19:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:19:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:19:44,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-28 04:19:44,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-28 04:19:44,015 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 969 flow. Second operand 6 states and 138 transitions. [2024-06-28 04:19:44,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 154 transitions, 1543 flow [2024-06-28 04:19:44,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 1453 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 04:19:44,128 INFO L231 Difference]: Finished difference. Result has 96 places, 122 transitions, 1102 flow [2024-06-28 04:19:44,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1102, PETRI_PLACES=96, PETRI_TRANSITIONS=122} [2024-06-28 04:19:44,129 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-28 04:19:44,129 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 122 transitions, 1102 flow [2024-06-28 04:19:44,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:44,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:44,129 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 04:19:44,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 04:19:44,129 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:44,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:44,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2036480778, now seen corresponding path program 1 times [2024-06-28 04:19:44,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:44,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459675588] [2024-06-28 04:19:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:44,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:19:46,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:46,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459675588] [2024-06-28 04:19:46,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459675588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:46,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:46,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:19:46,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746967921] [2024-06-28 04:19:46,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:46,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:19:46,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:46,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:19:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:19:46,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:19:46,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 122 transitions, 1102 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 04:19:46,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:46,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:19:46,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:49,422 INFO L124 PetriNetUnfolderBase]: 9194/12731 cut-off events. [2024-06-28 04:19:49,423 INFO L125 PetriNetUnfolderBase]: For 182875/182875 co-relation queries the response was YES. [2024-06-28 04:19:49,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69563 conditions, 12731 events. 9194/12731 cut-off events. For 182875/182875 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 66380 event pairs, 2608 based on Foata normal form. 18/12745 useless extension candidates. Maximal degree in co-relation 69525. Up to 12363 conditions per place. [2024-06-28 04:19:49,506 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 145 selfloop transitions, 19 changer transitions 0/169 dead transitions. [2024-06-28 04:19:49,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 169 transitions, 1579 flow [2024-06-28 04:19:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:19:49,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:19:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-28 04:19:49,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2024-06-28 04:19:49,508 INFO L175 Difference]: Start difference. First operand has 96 places, 122 transitions, 1102 flow. Second operand 7 states and 160 transitions. [2024-06-28 04:19:49,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 169 transitions, 1579 flow [2024-06-28 04:19:49,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 169 transitions, 1545 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-28 04:19:49,650 INFO L231 Difference]: Finished difference. Result has 101 places, 123 transitions, 1145 flow [2024-06-28 04:19:49,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1145, PETRI_PLACES=101, PETRI_TRANSITIONS=123} [2024-06-28 04:19:49,651 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-28 04:19:49,651 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 123 transitions, 1145 flow [2024-06-28 04:19:49,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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 04:19:49,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:49,652 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 04:19:49,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 04:19:49,653 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:49,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:49,654 INFO L85 PathProgramCache]: Analyzing trace with hash -531873810, now seen corresponding path program 1 times [2024-06-28 04:19:49,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:49,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742999400] [2024-06-28 04:19:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:49,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:52,343 INFO 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 04:19:52,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:52,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742999400] [2024-06-28 04:19:52,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742999400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:52,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:52,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 04:19:52,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772778494] [2024-06-28 04:19:52,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:52,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 04:19:52,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 04:19:52,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 04:19:52,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:19:52,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 123 transitions, 1145 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:52,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:52,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:19:52,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:54,809 INFO L124 PetriNetUnfolderBase]: 8806/12354 cut-off events. [2024-06-28 04:19:54,809 INFO L125 PetriNetUnfolderBase]: For 204338/204346 co-relation queries the response was YES. [2024-06-28 04:19:54,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70141 conditions, 12354 events. 8806/12354 cut-off events. For 204338/204346 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 66071 event pairs, 3374 based on Foata normal form. 14/12363 useless extension candidates. Maximal degree in co-relation 70100. Up to 11896 conditions per place. [2024-06-28 04:19:54,909 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 120 selfloop transitions, 34 changer transitions 0/163 dead transitions. [2024-06-28 04:19:54,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 163 transitions, 1743 flow [2024-06-28 04:19:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:19:54,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:19:54,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-28 04:19:54,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-28 04:19:54,912 INFO L175 Difference]: Start difference. First operand has 101 places, 123 transitions, 1145 flow. Second operand 6 states and 142 transitions. [2024-06-28 04:19:54,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 163 transitions, 1743 flow [2024-06-28 04:19:55,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 163 transitions, 1666 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 04:19:55,065 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1294 flow [2024-06-28 04:19:55,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1294, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2024-06-28 04:19:55,073 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2024-06-28 04:19:55,073 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1294 flow [2024-06-28 04:19:55,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:55,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:19:55,074 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 04:19:55,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 04:19:55,074 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:19:55,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:19:55,074 INFO L85 PathProgramCache]: Analyzing trace with hash 603332924, now seen corresponding path program 2 times [2024-06-28 04:19:55,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:19:55,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716415118] [2024-06-28 04:19:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:19:55,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:19:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:19:57,184 INFO 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 04:19:57,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:19:57,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716415118] [2024-06-28 04:19:57,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716415118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:19:57,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:19:57,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:19:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820622818] [2024-06-28 04:19:57,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:19:57,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:19:57,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:19:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:19:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:19:57,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:19:57,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1294 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:19:57,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:19:57,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:19:57,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:19:59,792 INFO L124 PetriNetUnfolderBase]: 8792/12331 cut-off events. [2024-06-28 04:19:59,793 INFO L125 PetriNetUnfolderBase]: For 227313/227313 co-relation queries the response was YES. [2024-06-28 04:19:59,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72961 conditions, 12331 events. 8792/12331 cut-off events. For 227313/227313 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 65749 event pairs, 3369 based on Foata normal form. 6/12332 useless extension candidates. Maximal degree in co-relation 72919. Up to 11994 conditions per place. [2024-06-28 04:19:59,885 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 127 selfloop transitions, 21 changer transitions 0/157 dead transitions. [2024-06-28 04:19:59,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 157 transitions, 1666 flow [2024-06-28 04:19:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 04:19:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 04:19:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-28 04:19:59,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42948717948717946 [2024-06-28 04:19:59,887 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1294 flow. Second operand 6 states and 134 transitions. [2024-06-28 04:19:59,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 157 transitions, 1666 flow [2024-06-28 04:20:00,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 157 transitions, 1549 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-28 04:20:00,142 INFO L231 Difference]: Finished difference. Result has 106 places, 132 transitions, 1229 flow [2024-06-28 04:20:00,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1229, PETRI_PLACES=106, PETRI_TRANSITIONS=132} [2024-06-28 04:20:00,142 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-28 04:20:00,142 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 132 transitions, 1229 flow [2024-06-28 04:20:00,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:00,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:00,143 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 04:20:00,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 04:20:00,143 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:00,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1726952339, now seen corresponding path program 1 times [2024-06-28 04:20:00,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:00,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267103977] [2024-06-28 04:20:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:00,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:02,584 INFO 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 04:20:02,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:02,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267103977] [2024-06-28 04:20:02,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267103977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:02,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:02,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:02,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890113753] [2024-06-28 04:20:02,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:02,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:02,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:02,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:02,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:02,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:20:02,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 132 transitions, 1229 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:02,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:02,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:20:02,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:05,791 INFO L124 PetriNetUnfolderBase]: 9588/13267 cut-off events. [2024-06-28 04:20:05,791 INFO L125 PetriNetUnfolderBase]: For 243440/243440 co-relation queries the response was YES. [2024-06-28 04:20:05,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77831 conditions, 13267 events. 9588/13267 cut-off events. For 243440/243440 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 69614 event pairs, 3350 based on Foata normal form. 16/13279 useless extension candidates. Maximal degree in co-relation 77787. Up to 12750 conditions per place. [2024-06-28 04:20:05,902 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 134 selfloop transitions, 45 changer transitions 0/184 dead transitions. [2024-06-28 04:20:05,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 184 transitions, 1963 flow [2024-06-28 04:20:05,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:20:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:20:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-28 04:20:05,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41586538461538464 [2024-06-28 04:20:05,905 INFO L175 Difference]: Start difference. First operand has 106 places, 132 transitions, 1229 flow. Second operand 8 states and 173 transitions. [2024-06-28 04:20:05,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 184 transitions, 1963 flow [2024-06-28 04:20:06,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 184 transitions, 1891 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 04:20:06,137 INFO L231 Difference]: Finished difference. Result has 111 places, 148 transitions, 1494 flow [2024-06-28 04:20:06,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1494, PETRI_PLACES=111, PETRI_TRANSITIONS=148} [2024-06-28 04:20:06,138 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-28 04:20:06,138 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 148 transitions, 1494 flow [2024-06-28 04:20:06,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:06,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:06,138 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 04:20:06,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 04:20:06,138 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:06,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash -799461781, now seen corresponding path program 2 times [2024-06-28 04:20:06,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:06,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111920605] [2024-06-28 04:20:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:06,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:08,755 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 04:20:08,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:08,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111920605] [2024-06-28 04:20:08,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111920605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:08,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:08,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:08,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081363235] [2024-06-28 04:20:08,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:08,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:08,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:08,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:08,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:08,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:20:08,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 148 transitions, 1494 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:08,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:08,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:20:08,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:11,728 INFO L124 PetriNetUnfolderBase]: 9728/13465 cut-off events. [2024-06-28 04:20:11,729 INFO L125 PetriNetUnfolderBase]: For 275677/275677 co-relation queries the response was YES. [2024-06-28 04:20:11,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83360 conditions, 13465 events. 9728/13465 cut-off events. For 275677/275677 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 70838 event pairs, 3352 based on Foata normal form. 16/13477 useless extension candidates. Maximal degree in co-relation 83313. Up to 12618 conditions per place. [2024-06-28 04:20:11,843 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 145 selfloop transitions, 58 changer transitions 0/208 dead transitions. [2024-06-28 04:20:11,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 208 transitions, 2396 flow [2024-06-28 04:20:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:20:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:20:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-28 04:20:11,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-28 04:20:11,848 INFO L175 Difference]: Start difference. First operand has 111 places, 148 transitions, 1494 flow. Second operand 7 states and 166 transitions. [2024-06-28 04:20:11,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 208 transitions, 2396 flow [2024-06-28 04:20:12,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 208 transitions, 2295 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-28 04:20:12,138 INFO L231 Difference]: Finished difference. Result has 117 places, 166 transitions, 1834 flow [2024-06-28 04:20:12,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1834, PETRI_PLACES=117, PETRI_TRANSITIONS=166} [2024-06-28 04:20:12,139 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 62 predicate places. [2024-06-28 04:20:12,139 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 166 transitions, 1834 flow [2024-06-28 04:20:12,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:12,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:12,139 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 04:20:12,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 04:20:12,140 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:12,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:12,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1863425902, now seen corresponding path program 1 times [2024-06-28 04:20:12,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:12,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813706699] [2024-06-28 04:20:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:12,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:14,685 INFO 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 04:20:14,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813706699] [2024-06-28 04:20:14,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813706699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:14,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:14,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:14,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338678109] [2024-06-28 04:20:14,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:14,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:14,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:14,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:14,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:14,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:14,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 166 transitions, 1834 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:14,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:14,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:14,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:17,469 INFO L124 PetriNetUnfolderBase]: 9330/13051 cut-off events. [2024-06-28 04:20:17,469 INFO L125 PetriNetUnfolderBase]: For 290711/290811 co-relation queries the response was YES. [2024-06-28 04:20:17,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85743 conditions, 13051 events. 9330/13051 cut-off events. For 290711/290811 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 69214 event pairs, 3423 based on Foata normal form. 20/13019 useless extension candidates. Maximal degree in co-relation 85692. Up to 12624 conditions per place. [2024-06-28 04:20:17,600 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 177 selfloop transitions, 32 changer transitions 0/220 dead transitions. [2024-06-28 04:20:17,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 220 transitions, 2626 flow [2024-06-28 04:20:17,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:20:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:20:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-28 04:20:17,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478021978021978 [2024-06-28 04:20:17,602 INFO L175 Difference]: Start difference. First operand has 117 places, 166 transitions, 1834 flow. Second operand 7 states and 163 transitions. [2024-06-28 04:20:17,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 220 transitions, 2626 flow [2024-06-28 04:20:17,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 220 transitions, 2530 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-28 04:20:17,924 INFO L231 Difference]: Finished difference. Result has 125 places, 182 transitions, 2056 flow [2024-06-28 04:20:17,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2056, PETRI_PLACES=125, PETRI_TRANSITIONS=182} [2024-06-28 04:20:17,925 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-28 04:20:17,925 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 182 transitions, 2056 flow [2024-06-28 04:20:17,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:17,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:17,925 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 04:20:17,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 04:20:17,925 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:17,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:17,926 INFO L85 PathProgramCache]: Analyzing trace with hash 691783648, now seen corresponding path program 2 times [2024-06-28 04:20:17,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:17,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584851818] [2024-06-28 04:20:17,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:17,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:21,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:21,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584851818] [2024-06-28 04:20:21,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584851818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:21,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:21,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:21,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125100132] [2024-06-28 04:20:21,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:21,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:21,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:21,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:21,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:21,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:21,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 182 transitions, 2056 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:21,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:21,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:21,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:23,865 INFO L124 PetriNetUnfolderBase]: 9361/13088 cut-off events. [2024-06-28 04:20:23,866 INFO L125 PetriNetUnfolderBase]: For 297554/297644 co-relation queries the response was YES. [2024-06-28 04:20:23,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85209 conditions, 13088 events. 9361/13088 cut-off events. For 297554/297644 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 69458 event pairs, 3413 based on Foata normal form. 12/13048 useless extension candidates. Maximal degree in co-relation 85153. Up to 12703 conditions per place. [2024-06-28 04:20:23,975 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 187 selfloop transitions, 25 changer transitions 0/223 dead transitions. [2024-06-28 04:20:23,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 223 transitions, 2670 flow [2024-06-28 04:20:23,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:20:23,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:20:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-28 04:20:23,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43131868131868134 [2024-06-28 04:20:23,977 INFO L175 Difference]: Start difference. First operand has 125 places, 182 transitions, 2056 flow. Second operand 7 states and 157 transitions. [2024-06-28 04:20:23,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 223 transitions, 2670 flow [2024-06-28 04:20:24,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 223 transitions, 2590 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-06-28 04:20:24,313 INFO L231 Difference]: Finished difference. Result has 132 places, 191 transitions, 2173 flow [2024-06-28 04:20:24,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2173, PETRI_PLACES=132, PETRI_TRANSITIONS=191} [2024-06-28 04:20:24,314 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-28 04:20:24,314 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 191 transitions, 2173 flow [2024-06-28 04:20:24,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:24,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:24,314 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 04:20:24,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 04:20:24,315 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:24,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:24,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1863335537, now seen corresponding path program 1 times [2024-06-28 04:20:24,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:24,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437127789] [2024-06-28 04:20:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:24,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:27,364 INFO 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 04:20:27,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:27,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437127789] [2024-06-28 04:20:27,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437127789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:27,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:27,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:27,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453841130] [2024-06-28 04:20:27,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:27,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:27,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:27,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:27,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:27,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:20:27,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 191 transitions, 2173 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:27,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:27,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:20:27,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:30,312 INFO L124 PetriNetUnfolderBase]: 9997/13813 cut-off events. [2024-06-28 04:20:30,312 INFO L125 PetriNetUnfolderBase]: For 329908/329908 co-relation queries the response was YES. [2024-06-28 04:20:30,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90985 conditions, 13813 events. 9997/13813 cut-off events. For 329908/329908 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 72389 event pairs, 3419 based on Foata normal form. 8/13820 useless extension candidates. Maximal degree in co-relation 90925. Up to 13574 conditions per place. [2024-06-28 04:20:30,434 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 224 selfloop transitions, 27 changer transitions 0/256 dead transitions. [2024-06-28 04:20:30,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 256 transitions, 3214 flow [2024-06-28 04:20:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:20:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:20:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-28 04:20:30,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-28 04:20:30,436 INFO L175 Difference]: Start difference. First operand has 132 places, 191 transitions, 2173 flow. Second operand 7 states and 161 transitions. [2024-06-28 04:20:30,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 256 transitions, 3214 flow [2024-06-28 04:20:30,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 256 transitions, 3088 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-28 04:20:30,875 INFO L231 Difference]: Finished difference. Result has 138 places, 213 transitions, 2446 flow [2024-06-28 04:20:30,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2446, PETRI_PLACES=138, PETRI_TRANSITIONS=213} [2024-06-28 04:20:30,876 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-06-28 04:20:30,876 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 213 transitions, 2446 flow [2024-06-28 04:20:30,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:30,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:30,876 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 04:20:30,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 04:20:30,876 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:30,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:30,877 INFO L85 PathProgramCache]: Analyzing trace with hash 858726459, now seen corresponding path program 2 times [2024-06-28 04:20:30,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:30,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575487576] [2024-06-28 04:20:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:30,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:33,698 INFO 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 04:20:33,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:33,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575487576] [2024-06-28 04:20:33,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575487576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:33,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:33,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:33,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087572973] [2024-06-28 04:20:33,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:33,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:33,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:33,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:33,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:33,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:20:33,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 213 transitions, 2446 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:33,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:33,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:20:33,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:37,851 INFO L124 PetriNetUnfolderBase]: 11920/16378 cut-off events. [2024-06-28 04:20:37,851 INFO L125 PetriNetUnfolderBase]: For 426528/426528 co-relation queries the response was YES. [2024-06-28 04:20:37,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114559 conditions, 16378 events. 11920/16378 cut-off events. For 426528/426528 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 86190 event pairs, 3337 based on Foata normal form. 8/16385 useless extension candidates. Maximal degree in co-relation 114495. Up to 14300 conditions per place. [2024-06-28 04:20:37,988 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 220 selfloop transitions, 87 changer transitions 0/312 dead transitions. [2024-06-28 04:20:37,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 312 transitions, 4028 flow [2024-06-28 04:20:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:20:37,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:20:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-28 04:20:37,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45726495726495725 [2024-06-28 04:20:37,990 INFO L175 Difference]: Start difference. First operand has 138 places, 213 transitions, 2446 flow. Second operand 9 states and 214 transitions. [2024-06-28 04:20:37,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 312 transitions, 4028 flow [2024-06-28 04:20:38,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 312 transitions, 3938 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-06-28 04:20:38,371 INFO L231 Difference]: Finished difference. Result has 148 places, 253 transitions, 3219 flow [2024-06-28 04:20:38,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3219, PETRI_PLACES=148, PETRI_TRANSITIONS=253} [2024-06-28 04:20:38,371 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2024-06-28 04:20:38,371 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 253 transitions, 3219 flow [2024-06-28 04:20:38,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:38,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:38,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:20:38,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 04:20:38,372 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:38,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash 858518914, now seen corresponding path program 3 times [2024-06-28 04:20:38,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:38,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829372440] [2024-06-28 04:20:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:38,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:41,117 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 04:20:41,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:41,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829372440] [2024-06-28 04:20:41,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829372440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:41,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:41,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:41,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115239685] [2024-06-28 04:20:41,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:41,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:41,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:41,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:41,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:41,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:20:41,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 253 transitions, 3219 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:41,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:41,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:20:41,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:45,051 INFO L124 PetriNetUnfolderBase]: 11509/15925 cut-off events. [2024-06-28 04:20:45,052 INFO L125 PetriNetUnfolderBase]: For 483590/483782 co-relation queries the response was YES. [2024-06-28 04:20:45,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123844 conditions, 15925 events. 11509/15925 cut-off events. For 483590/483782 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 84229 event pairs, 3971 based on Foata normal form. 61/15933 useless extension candidates. Maximal degree in co-relation 123775. Up to 15315 conditions per place. [2024-06-28 04:20:45,244 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 227 selfloop transitions, 39 changer transitions 0/286 dead transitions. [2024-06-28 04:20:45,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 286 transitions, 3924 flow [2024-06-28 04:20:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:20:45,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:20:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-28 04:20:45,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-28 04:20:45,247 INFO L175 Difference]: Start difference. First operand has 148 places, 253 transitions, 3219 flow. Second operand 7 states and 154 transitions. [2024-06-28 04:20:45,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 286 transitions, 3924 flow [2024-06-28 04:20:45,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 286 transitions, 3747 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-28 04:20:45,884 INFO L231 Difference]: Finished difference. Result has 153 places, 258 transitions, 3264 flow [2024-06-28 04:20:45,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3042, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3264, PETRI_PLACES=153, PETRI_TRANSITIONS=258} [2024-06-28 04:20:45,885 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-28 04:20:45,885 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 258 transitions, 3264 flow [2024-06-28 04:20:45,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:45,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:45,886 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 04:20:45,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 04:20:45,886 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:45,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:45,886 INFO L85 PathProgramCache]: Analyzing trace with hash 858519069, now seen corresponding path program 3 times [2024-06-28 04:20:45,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:45,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313176271] [2024-06-28 04:20:45,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:45,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:20:48,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:48,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313176271] [2024-06-28 04:20:48,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313176271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:48,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:48,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:48,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121457445] [2024-06-28 04:20:48,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:48,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:48,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:48,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:48,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:48,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:20:48,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 258 transitions, 3264 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:48,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:48,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:20:48,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:20:52,540 INFO L124 PetriNetUnfolderBase]: 12004/16487 cut-off events. [2024-06-28 04:20:52,541 INFO L125 PetriNetUnfolderBase]: For 515251/515251 co-relation queries the response was YES. [2024-06-28 04:20:52,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128685 conditions, 16487 events. 12004/16487 cut-off events. For 515251/515251 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 86651 event pairs, 3886 based on Foata normal form. 8/16494 useless extension candidates. Maximal degree in co-relation 128612. Up to 16141 conditions per place. [2024-06-28 04:20:52,740 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 288 selfloop transitions, 43 changer transitions 0/336 dead transitions. [2024-06-28 04:20:52,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 336 transitions, 4690 flow [2024-06-28 04:20:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:20:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:20:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-28 04:20:52,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340659340659341 [2024-06-28 04:20:52,742 INFO L175 Difference]: Start difference. First operand has 153 places, 258 transitions, 3264 flow. Second operand 7 states and 158 transitions. [2024-06-28 04:20:52,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 336 transitions, 4690 flow [2024-06-28 04:20:53,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 336 transitions, 4531 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-28 04:20:53,411 INFO L231 Difference]: Finished difference. Result has 158 places, 290 transitions, 3713 flow [2024-06-28 04:20:53,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3111, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3713, PETRI_PLACES=158, PETRI_TRANSITIONS=290} [2024-06-28 04:20:53,411 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 103 predicate places. [2024-06-28 04:20:53,412 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 290 transitions, 3713 flow [2024-06-28 04:20:53,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:53,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:20:53,412 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 04:20:53,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 04:20:53,412 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:20:53,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:20:53,413 INFO L85 PathProgramCache]: Analyzing trace with hash 858734395, now seen corresponding path program 1 times [2024-06-28 04:20:53,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:20:53,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097233620] [2024-06-28 04:20:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:20:53,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:20:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:20:56,464 INFO 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 04:20:56,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:20:56,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097233620] [2024-06-28 04:20:56,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097233620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:20:56,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:20:56,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 04:20:56,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577682422] [2024-06-28 04:20:56,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:20:56,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 04:20:56,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:20:56,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 04:20:56,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 04:20:56,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:20:56,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 290 transitions, 3713 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:20:56,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:20:56,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:20:56,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:00,613 INFO L124 PetriNetUnfolderBase]: 12088/16603 cut-off events. [2024-06-28 04:21:00,614 INFO L125 PetriNetUnfolderBase]: For 564297/564297 co-relation queries the response was YES. [2024-06-28 04:21:00,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134614 conditions, 16603 events. 12088/16603 cut-off events. For 564297/564297 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 87497 event pairs, 3862 based on Foata normal form. 16/16618 useless extension candidates. Maximal degree in co-relation 134538. Up to 16295 conditions per place. [2024-06-28 04:21:00,862 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 295 selfloop transitions, 34 changer transitions 0/334 dead transitions. [2024-06-28 04:21:00,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 334 transitions, 4712 flow [2024-06-28 04:21:00,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:21:00,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:21:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-28 04:21:00,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43956043956043955 [2024-06-28 04:21:00,863 INFO L175 Difference]: Start difference. First operand has 158 places, 290 transitions, 3713 flow. Second operand 7 states and 160 transitions. [2024-06-28 04:21:00,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 334 transitions, 4712 flow [2024-06-28 04:21:01,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 334 transitions, 4550 flow, removed 80 selfloop flow, removed 1 redundant places. [2024-06-28 04:21:01,730 INFO L231 Difference]: Finished difference. Result has 164 places, 293 transitions, 3710 flow [2024-06-28 04:21:01,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3553, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3710, PETRI_PLACES=164, PETRI_TRANSITIONS=293} [2024-06-28 04:21:01,731 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2024-06-28 04:21:01,731 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 293 transitions, 3710 flow [2024-06-28 04:21:01,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:01,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:01,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:01,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 04:21:01,731 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:01,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:01,732 INFO L85 PathProgramCache]: Analyzing trace with hash -32397747, now seen corresponding path program 1 times [2024-06-28 04:21:01,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:01,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214263703] [2024-06-28 04:21:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:01,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:21:05,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:05,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214263703] [2024-06-28 04:21:05,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214263703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:05,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:05,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:05,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022445986] [2024-06-28 04:21:05,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:05,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:05,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:05,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:05,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:05,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:21:05,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 293 transitions, 3710 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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 04:21:05,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:05,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:21:05,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:09,710 INFO L124 PetriNetUnfolderBase]: 11800/16339 cut-off events. [2024-06-28 04:21:09,711 INFO L125 PetriNetUnfolderBase]: For 600513/600646 co-relation queries the response was YES. [2024-06-28 04:21:09,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135202 conditions, 16339 events. 11800/16339 cut-off events. For 600513/600646 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 86553 event pairs, 3675 based on Foata normal form. 20/16319 useless extension candidates. Maximal degree in co-relation 135123. Up to 15397 conditions per place. [2024-06-28 04:21:09,894 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 270 selfloop transitions, 51 changer transitions 0/350 dead transitions. [2024-06-28 04:21:09,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 350 transitions, 4782 flow [2024-06-28 04:21:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:09,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-28 04:21:09,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495192307692308 [2024-06-28 04:21:09,896 INFO L175 Difference]: Start difference. First operand has 164 places, 293 transitions, 3710 flow. Second operand 8 states and 187 transitions. [2024-06-28 04:21:09,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 350 transitions, 4782 flow [2024-06-28 04:21:10,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 350 transitions, 4670 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 04:21:10,815 INFO L231 Difference]: Finished difference. Result has 168 places, 301 transitions, 3931 flow [2024-06-28 04:21:10,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3598, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3931, PETRI_PLACES=168, PETRI_TRANSITIONS=301} [2024-06-28 04:21:10,825 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 113 predicate places. [2024-06-28 04:21:10,825 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 301 transitions, 3931 flow [2024-06-28 04:21:10,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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 04:21:10,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:10,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:10,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 04:21:10,826 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:10,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:10,826 INFO L85 PathProgramCache]: Analyzing trace with hash -32337173, now seen corresponding path program 1 times [2024-06-28 04:21:10,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:10,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212812158] [2024-06-28 04:21:10,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:10,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:13,973 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 04:21:13,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:13,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212812158] [2024-06-28 04:21:13,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212812158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:13,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:13,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:13,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950862992] [2024-06-28 04:21:13,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:13,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:13,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:13,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:13,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:14,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:21:14,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 301 transitions, 3931 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:14,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:14,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:21:14,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:18,686 INFO L124 PetriNetUnfolderBase]: 12513/17167 cut-off events. [2024-06-28 04:21:18,686 INFO L125 PetriNetUnfolderBase]: For 652948/652954 co-relation queries the response was YES. [2024-06-28 04:21:18,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144363 conditions, 17167 events. 12513/17167 cut-off events. For 652948/652954 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 90649 event pairs, 3840 based on Foata normal form. 14/17180 useless extension candidates. Maximal degree in co-relation 144282. Up to 16395 conditions per place. [2024-06-28 04:21:18,875 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 305 selfloop transitions, 90 changer transitions 0/400 dead transitions. [2024-06-28 04:21:18,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 400 transitions, 5852 flow [2024-06-28 04:21:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-28 04:21:18,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735576923076923 [2024-06-28 04:21:18,877 INFO L175 Difference]: Start difference. First operand has 168 places, 301 transitions, 3931 flow. Second operand 8 states and 197 transitions. [2024-06-28 04:21:18,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 400 transitions, 5852 flow [2024-06-28 04:21:19,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 400 transitions, 5695 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-28 04:21:19,948 INFO L231 Difference]: Finished difference. Result has 175 places, 330 transitions, 4547 flow [2024-06-28 04:21:19,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3786, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4547, PETRI_PLACES=175, PETRI_TRANSITIONS=330} [2024-06-28 04:21:19,950 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2024-06-28 04:21:19,950 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 330 transitions, 4547 flow [2024-06-28 04:21:19,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:19,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:19,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:19,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 04:21:19,951 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:19,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:19,951 INFO L85 PathProgramCache]: Analyzing trace with hash -32337297, now seen corresponding path program 2 times [2024-06-28 04:21:19,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:19,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219769988] [2024-06-28 04:21:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:19,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:23,419 INFO 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 04:21:23,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:23,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219769988] [2024-06-28 04:21:23,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219769988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:23,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:23,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:23,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16590831] [2024-06-28 04:21:23,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:23,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:23,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:23,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:23,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:23,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-28 04:21:23,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 330 transitions, 4547 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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 04:21:23,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:23,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-28 04:21:23,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:21:28,198 INFO L124 PetriNetUnfolderBase]: 12118/16758 cut-off events. [2024-06-28 04:21:28,198 INFO L125 PetriNetUnfolderBase]: For 715325/715424 co-relation queries the response was YES. [2024-06-28 04:21:28,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147040 conditions, 16758 events. 12118/16758 cut-off events. For 715325/715424 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 89097 event pairs, 3946 based on Foata normal form. 20/16742 useless extension candidates. Maximal degree in co-relation 146954. Up to 15900 conditions per place. [2024-06-28 04:21:28,401 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 290 selfloop transitions, 51 changer transitions 0/375 dead transitions. [2024-06-28 04:21:28,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 375 transitions, 5404 flow [2024-06-28 04:21:28,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:21:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:21:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-28 04:21:28,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2024-06-28 04:21:28,403 INFO L175 Difference]: Start difference. First operand has 175 places, 330 transitions, 4547 flow. Second operand 8 states and 180 transitions. [2024-06-28 04:21:28,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 375 transitions, 5404 flow [2024-06-28 04:21:29,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 375 transitions, 5212 flow, removed 83 selfloop flow, removed 2 redundant places. [2024-06-28 04:21:29,504 INFO L231 Difference]: Finished difference. Result has 181 places, 333 transitions, 4545 flow [2024-06-28 04:21:29,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4355, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4545, PETRI_PLACES=181, PETRI_TRANSITIONS=333} [2024-06-28 04:21:29,505 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 126 predicate places. [2024-06-28 04:21:29,505 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 333 transitions, 4545 flow [2024-06-28 04:21:29,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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 04:21:29,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:21:29,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:21:29,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 04:21:29,506 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-28 04:21:29,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:21:29,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1928824225, now seen corresponding path program 2 times [2024-06-28 04:21:29,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:21:29,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637921335] [2024-06-28 04:21:29,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:21:29,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:21:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:21:33,914 INFO 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 04:21:33,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:21:33,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637921335] [2024-06-28 04:21:33,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637921335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:21:33,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:21:33,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:21:33,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241729497] [2024-06-28 04:21:33,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:21:33,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:21:33,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:21:33,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:21:33,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:21:33,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-28 04:21:33,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 333 transitions, 4545 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:21:33,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:21:33,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-28 04:21:33,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand