./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe016_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/safe016_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe016_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:40:59,684 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:40:59,759 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:40:59,762 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:40:59,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:40:59,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:40:59,778 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:40:59,778 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:40:59,778 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:40:59,779 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:40:59,780 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:40:59,780 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:40:59,780 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:40:59,780 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:40:59,781 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:40:59,781 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:40:59,781 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:40:59,781 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:40:59,781 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:40:59,782 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:40:59,782 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:40:59,792 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:40:59,792 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:40:59,792 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:40:59,793 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:40:59,793 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:40:59,793 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:40:59,793 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:40:59,793 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:40:59,793 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:40:59,794 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:40:59,794 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:40:59,794 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:40:59,794 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:40:59,794 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:40:59,794 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:40:59,795 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:40:59,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:40:59,795 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:40:59,795 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:40:59,795 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:40:59,795 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:40:59,795 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:40:59,796 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:40:59,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:40:59,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:40:59,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:41:00,000 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:41:00,000 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:41:00,001 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe016_rmo.oepc.yml/witness.yml [2024-06-21 17:41:00,239 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:41:00,240 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:41:00,240 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i [2024-06-21 17:41:01,182 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:41:01,439 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:41:01,439 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i [2024-06-21 17:41:01,453 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5263b3a9/9348eab76e2c409e85063e16f29e3a3c/FLAGff0b568eb [2024-06-21 17:41:01,462 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5263b3a9/9348eab76e2c409e85063e16f29e3a3c [2024-06-21 17:41:01,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:41:01,464 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:41:01,465 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:41:01,465 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:41:01,468 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:41:01,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:41:00" (1/2) ... [2024-06-21 17:41:01,469 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2063b46b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:41:01, skipping insertion in model container [2024-06-21 17:41:01,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:41:00" (1/2) ... [2024-06-21 17:41:01,471 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@99ee78b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:41:01, skipping insertion in model container [2024-06-21 17:41:01,471 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:41:01" (2/2) ... [2024-06-21 17:41:01,471 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2063b46b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:01, skipping insertion in model container [2024-06-21 17:41:01,471 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:41:01" (2/2) ... [2024-06-21 17:41:01,471 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:41:01,643 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:41:01,644 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-21 17:41:01,644 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-21 17:41:01,644 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-21 17:41:01,644 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$r_buff0_thd4 == (_Bool)0) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-21 17:41:01,644 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:41:01,645 INFO L106 edCorrectnessWitness]: ghost_update [L852-L852] multithreaded = 1; [2024-06-21 17:41:01,678 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:41:01,943 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:41:01,951 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:41:02,115 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:41:02,141 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:41:02,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02 WrapperNode [2024-06-21 17:41:02,141 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:41:02,142 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:41:02,142 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:41:02,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:41:02,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02" (1/1) ... [2024-06-21 17:41:02,160 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02" (1/1) ... [2024-06-21 17:41:02,189 INFO L138 Inliner]: procedures = 176, calls = 94, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 259 [2024-06-21 17:41:02,189 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:41:02,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:41:02,190 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:41:02,190 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:41:02,198 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02" (1/1) ... [2024-06-21 17:41:02,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02" (1/1) ... [2024-06-21 17:41:02,204 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02" (1/1) ... [2024-06-21 17:41:02,218 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-21 17:41:02,219 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02" (1/1) ... [2024-06-21 17:41:02,219 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02" (1/1) ... [2024-06-21 17:41:02,230 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02" (1/1) ... [2024-06-21 17:41:02,232 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02" (1/1) ... [2024-06-21 17:41:02,235 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02" (1/1) ... [2024-06-21 17:41:02,236 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02" (1/1) ... [2024-06-21 17:41:02,240 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:41:02,241 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:41:02,241 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:41:02,241 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:41:02,242 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02" (1/1) ... [2024-06-21 17:41:02,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:41:02,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:41:02,281 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) [2024-06-21 17:41:02,304 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 [2024-06-21 17:41:02,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 17:41:02,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 17:41:02,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 17:41:02,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 17:41:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:41:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:41:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:41:02,317 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:41:02,317 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:41:02,318 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:41:02,318 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:41:02,318 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:41:02,319 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 17:41:02,319 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 17:41:02,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:41:02,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 17:41:02,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:41:02,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:41:02,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:41:02,323 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:41:02,471 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:41:02,473 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:41:03,110 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:41:03,111 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:41:03,475 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:41:03,476 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:41:03,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:41:03 BoogieIcfgContainer [2024-06-21 17:41:03,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:41:03,479 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:41:03,479 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:41:03,482 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:41:03,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:41:00" (1/4) ... [2024-06-21 17:41:03,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4d7bd9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:41:03, skipping insertion in model container [2024-06-21 17:41:03,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:41:01" (2/4) ... [2024-06-21 17:41:03,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4d7bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:41:03, skipping insertion in model container [2024-06-21 17:41:03,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:41:02" (3/4) ... [2024-06-21 17:41:03,484 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4d7bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:41:03, skipping insertion in model container [2024-06-21 17:41:03,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:41:03" (4/4) ... [2024-06-21 17:41:03,485 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_rmo.oepc.i [2024-06-21 17:41:03,500 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:41:03,500 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 17:41:03,500 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:41:03,557 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:41:03,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 17:41:03,611 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 17:41:03,611 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:41:03,614 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 70 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. [2024-06-21 17:41:03,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 17:41:03,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 17:41:03,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:41:03,627 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;@50563130, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:41:03,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 17:41:03,631 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:41:03,631 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 17:41:03,631 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:41:03,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:03,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:41:03,632 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)] === [2024-06-21 17:41:03,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:03,636 INFO L85 PathProgramCache]: Analyzing trace with hash 789058107, now seen corresponding path program 1 times [2024-06-21 17:41:03,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:03,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311550246] [2024-06-21 17:41:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:03,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:05,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:05,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311550246] [2024-06-21 17:41:05,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311550246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:05,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:05,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:41:05,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534395366] [2024-06-21 17:41:05,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:05,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:41:05,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:05,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:41:05,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:41:05,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 17:41:05,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:05,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:05,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 17:41:05,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:07,043 INFO L124 PetriNetUnfolderBase]: 5566/7763 cut-off events. [2024-06-21 17:41:07,044 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-06-21 17:41:07,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15709 conditions, 7763 events. 5566/7763 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 40403 event pairs, 4068 based on Foata normal form. 1/7637 useless extension candidates. Maximal degree in co-relation 15696. Up to 7674 conditions per place. [2024-06-21 17:41:07,086 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 46 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-06-21 17:41:07,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 241 flow [2024-06-21 17:41:07,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:41:07,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:41:07,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-06-21 17:41:07,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 17:41:07,096 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 91 transitions. [2024-06-21 17:41:07,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 241 flow [2024-06-21 17:41:07,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 234 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 17:41:07,101 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 17:41:07,102 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} [2024-06-21 17:41:07,105 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 17:41:07,105 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 17:41:07,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:07,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:07,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:07,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:41:07,106 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)] === [2024-06-21 17:41:07,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:07,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1924103862, now seen corresponding path program 1 times [2024-06-21 17:41:07,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:07,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611202832] [2024-06-21 17:41:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:07,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:09,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:09,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611202832] [2024-06-21 17:41:09,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611202832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:09,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:09,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:41:09,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072216332] [2024-06-21 17:41:09,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:09,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:41:09,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:09,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:41:09,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:41:09,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-21 17:41:09,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:09,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:09,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-21 17:41:09,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:10,596 INFO L124 PetriNetUnfolderBase]: 5556/7744 cut-off events. [2024-06-21 17:41:10,597 INFO L125 PetriNetUnfolderBase]: For 1504/1512 co-relation queries the response was YES. [2024-06-21 17:41:10,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17958 conditions, 7744 events. 5556/7744 cut-off events. For 1504/1512 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 40089 event pairs, 3547 based on Foata normal form. 7/7748 useless extension candidates. Maximal degree in co-relation 17946. Up to 7633 conditions per place. [2024-06-21 17:41:10,640 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 59 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-21 17:41:10,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 345 flow [2024-06-21 17:41:10,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:41:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:41:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-21 17:41:10,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 17:41:10,643 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 120 transitions. [2024-06-21 17:41:10,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 345 flow [2024-06-21 17:41:10,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:41:10,649 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 17:41:10,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 17:41:10,650 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 17:41:10,651 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 17:41:10,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:10,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:10,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:10,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:41:10,656 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:41:10,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash 482323610, now seen corresponding path program 1 times [2024-06-21 17:41:10,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:10,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793090480] [2024-06-21 17:41:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:10,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:12,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:12,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793090480] [2024-06-21 17:41:12,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793090480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:12,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:12,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:41:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165281005] [2024-06-21 17:41:12,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:12,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:41:12,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:12,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:41:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:41:12,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:41:12,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:12,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:12,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:41:12,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:14,840 INFO L124 PetriNetUnfolderBase]: 6725/9323 cut-off events. [2024-06-21 17:41:14,840 INFO L125 PetriNetUnfolderBase]: For 4925/4925 co-relation queries the response was YES. [2024-06-21 17:41:14,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24128 conditions, 9323 events. 6725/9323 cut-off events. For 4925/4925 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 48173 event pairs, 3191 based on Foata normal form. 7/9326 useless extension candidates. Maximal degree in co-relation 24114. Up to 9079 conditions per place. [2024-06-21 17:41:14,885 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 89 selfloop transitions, 19 changer transitions 0/115 dead transitions. [2024-06-21 17:41:14,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 115 transitions, 613 flow [2024-06-21 17:41:14,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:41:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:41:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-21 17:41:14,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-21 17:41:14,887 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 155 transitions. [2024-06-21 17:41:14,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 115 transitions, 613 flow [2024-06-21 17:41:14,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 115 transitions, 582 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 17:41:14,891 INFO L231 Difference]: Finished difference. Result has 62 places, 68 transitions, 318 flow [2024-06-21 17:41:14,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=318, PETRI_PLACES=62, PETRI_TRANSITIONS=68} [2024-06-21 17:41:14,892 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-21 17:41:14,892 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 68 transitions, 318 flow [2024-06-21 17:41:14,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:14,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:14,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:14,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:41:14,893 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:41:14,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:14,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1375498633, now seen corresponding path program 1 times [2024-06-21 17:41:14,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:14,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735446726] [2024-06-21 17:41:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:14,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:17,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:17,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735446726] [2024-06-21 17:41:17,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735446726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:17,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:17,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:41:17,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38232231] [2024-06-21 17:41:17,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:17,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:41:17,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:17,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:41:17,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:41:17,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-21 17:41:17,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 68 transitions, 318 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:17,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:17,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-21 17:41:17,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:19,294 INFO L124 PetriNetUnfolderBase]: 6895/9589 cut-off events. [2024-06-21 17:41:19,295 INFO L125 PetriNetUnfolderBase]: For 11767/11767 co-relation queries the response was YES. [2024-06-21 17:41:19,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29176 conditions, 9589 events. 6895/9589 cut-off events. For 11767/11767 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 50037 event pairs, 2460 based on Foata normal form. 32/9617 useless extension candidates. Maximal degree in co-relation 29159. Up to 9063 conditions per place. [2024-06-21 17:41:19,340 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 101 selfloop transitions, 22 changer transitions 0/130 dead transitions. [2024-06-21 17:41:19,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 130 transitions, 762 flow [2024-06-21 17:41:19,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:41:19,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:41:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-21 17:41:19,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-21 17:41:19,342 INFO L175 Difference]: Start difference. First operand has 62 places, 68 transitions, 318 flow. Second operand 6 states and 181 transitions. [2024-06-21 17:41:19,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 130 transitions, 762 flow [2024-06-21 17:41:19,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 130 transitions, 754 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 17:41:19,348 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 383 flow [2024-06-21 17:41:19,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2024-06-21 17:41:19,349 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-21 17:41:19,349 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 383 flow [2024-06-21 17:41:19,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:19,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:19,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:19,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:41:19,349 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)] === [2024-06-21 17:41:19,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:19,350 INFO L85 PathProgramCache]: Analyzing trace with hash -343950783, now seen corresponding path program 1 times [2024-06-21 17:41:19,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:19,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616613742] [2024-06-21 17:41:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:19,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:20,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:20,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616613742] [2024-06-21 17:41:20,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616613742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:20,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:20,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:41:20,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433331104] [2024-06-21 17:41:20,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:20,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:41:20,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:20,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:41:20,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:41:20,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:41:20,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 383 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) [2024-06-21 17:41:20,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:20,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:41:20,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:22,599 INFO L124 PetriNetUnfolderBase]: 6886/9584 cut-off events. [2024-06-21 17:41:22,599 INFO L125 PetriNetUnfolderBase]: For 16914/16914 co-relation queries the response was YES. [2024-06-21 17:41:22,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31492 conditions, 9584 events. 6886/9584 cut-off events. For 16914/16914 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 50068 event pairs, 3060 based on Foata normal form. 3/9585 useless extension candidates. Maximal degree in co-relation 31471. Up to 9469 conditions per place. [2024-06-21 17:41:22,648 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 78 selfloop transitions, 10 changer transitions 0/94 dead transitions. [2024-06-21 17:41:22,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 94 transitions, 624 flow [2024-06-21 17:41:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:41:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:41:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 17:41:22,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-21 17:41:22,649 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 383 flow. Second operand 5 states and 118 transitions. [2024-06-21 17:41:22,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 94 transitions, 624 flow [2024-06-21 17:41:22,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 571 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:41:22,657 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 379 flow [2024-06-21 17:41:22,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=379, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-21 17:41:22,658 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2024-06-21 17:41:22,658 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 379 flow [2024-06-21 17:41:22,658 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) [2024-06-21 17:41:22,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:22,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:22,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:41:22,659 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)] === [2024-06-21 17:41:22,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:22,659 INFO L85 PathProgramCache]: Analyzing trace with hash -270766098, now seen corresponding path program 1 times [2024-06-21 17:41:22,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:22,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425752192] [2024-06-21 17:41:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:22,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:25,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:25,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425752192] [2024-06-21 17:41:25,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425752192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:25,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:25,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:41:25,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224755636] [2024-06-21 17:41:25,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:25,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:41:25,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:25,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:41:25,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:41:25,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:41:25,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 379 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) [2024-06-21 17:41:25,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:25,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:41:25,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:27,514 INFO L124 PetriNetUnfolderBase]: 6904/9602 cut-off events. [2024-06-21 17:41:27,514 INFO L125 PetriNetUnfolderBase]: For 19735/19735 co-relation queries the response was YES. [2024-06-21 17:41:27,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32004 conditions, 9602 events. 6904/9602 cut-off events. For 19735/19735 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 50106 event pairs, 3051 based on Foata normal form. 6/9604 useless extension candidates. Maximal degree in co-relation 31980. Up to 9348 conditions per place. [2024-06-21 17:41:27,556 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 85 selfloop transitions, 24 changer transitions 0/115 dead transitions. [2024-06-21 17:41:27,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 115 transitions, 750 flow [2024-06-21 17:41:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:41:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:41:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 17:41:27,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-21 17:41:27,558 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 379 flow. Second operand 6 states and 152 transitions. [2024-06-21 17:41:27,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 115 transitions, 750 flow [2024-06-21 17:41:27,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 115 transitions, 728 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 17:41:27,566 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 466 flow [2024-06-21 17:41:27,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=466, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-06-21 17:41:27,567 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-21 17:41:27,567 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 466 flow [2024-06-21 17:41:27,567 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) [2024-06-21 17:41:27,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:27,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:27,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:41:27,568 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)] === [2024-06-21 17:41:27,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:27,568 INFO L85 PathProgramCache]: Analyzing trace with hash 175810592, now seen corresponding path program 2 times [2024-06-21 17:41:27,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:27,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918587974] [2024-06-21 17:41:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:27,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:29,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:29,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918587974] [2024-06-21 17:41:29,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918587974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:29,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:29,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:41:29,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443161713] [2024-06-21 17:41:29,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:29,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:41:29,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:29,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:41:29,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:41:29,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:41:29,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 466 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) [2024-06-21 17:41:29,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:29,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:41:29,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:31,772 INFO L124 PetriNetUnfolderBase]: 6859/9519 cut-off events. [2024-06-21 17:41:31,773 INFO L125 PetriNetUnfolderBase]: For 23934/23934 co-relation queries the response was YES. [2024-06-21 17:41:31,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32746 conditions, 9519 events. 6859/9519 cut-off events. For 23934/23934 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 49432 event pairs, 3071 based on Foata normal form. 3/9514 useless extension candidates. Maximal degree in co-relation 32720. Up to 9279 conditions per place. [2024-06-21 17:41:31,825 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 77 selfloop transitions, 26 changer transitions 0/109 dead transitions. [2024-06-21 17:41:31,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 756 flow [2024-06-21 17:41:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:41:31,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:41:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 17:41:31,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-21 17:41:31,827 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 466 flow. Second operand 6 states and 146 transitions. [2024-06-21 17:41:31,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 756 flow [2024-06-21 17:41:31,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 719 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:41:31,841 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 500 flow [2024-06-21 17:41:31,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=500, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-21 17:41:31,841 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 21 predicate places. [2024-06-21 17:41:31,841 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 500 flow [2024-06-21 17:41:31,842 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) [2024-06-21 17:41:31,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:31,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:31,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:41:31,842 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)] === [2024-06-21 17:41:31,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:31,843 INFO L85 PathProgramCache]: Analyzing trace with hash 146325438, now seen corresponding path program 1 times [2024-06-21 17:41:31,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:31,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372511577] [2024-06-21 17:41:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:31,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:33,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:33,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372511577] [2024-06-21 17:41:33,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372511577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:33,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:33,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:41:33,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490104799] [2024-06-21 17:41:33,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:33,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:41:33,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:33,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:41:33,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:41:33,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:41:33,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 500 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) [2024-06-21 17:41:33,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:33,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:41:33,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:35,459 INFO L124 PetriNetUnfolderBase]: 6844/9510 cut-off events. [2024-06-21 17:41:35,459 INFO L125 PetriNetUnfolderBase]: For 28023/28023 co-relation queries the response was YES. [2024-06-21 17:41:35,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33427 conditions, 9510 events. 6844/9510 cut-off events. For 28023/28023 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 49278 event pairs, 2897 based on Foata normal form. 6/9514 useless extension candidates. Maximal degree in co-relation 33400. Up to 9360 conditions per place. [2024-06-21 17:41:35,549 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 94 selfloop transitions, 13 changer transitions 0/113 dead transitions. [2024-06-21 17:41:35,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 113 transitions, 814 flow [2024-06-21 17:41:35,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:41:35,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:41:35,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 17:41:35,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 17:41:35,566 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 500 flow. Second operand 6 states and 141 transitions. [2024-06-21 17:41:35,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 113 transitions, 814 flow [2024-06-21 17:41:35,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 113 transitions, 775 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 17:41:35,599 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 525 flow [2024-06-21 17:41:35,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=525, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-06-21 17:41:35,602 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-21 17:41:35,602 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 525 flow [2024-06-21 17:41:35,602 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) [2024-06-21 17:41:35,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:35,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:35,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:41:35,602 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:41:35,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:35,603 INFO L85 PathProgramCache]: Analyzing trace with hash 376086173, now seen corresponding path program 1 times [2024-06-21 17:41:35,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:35,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076309388] [2024-06-21 17:41:35,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:35,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:38,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:38,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076309388] [2024-06-21 17:41:38,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076309388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:38,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:38,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:41:38,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889183860] [2024-06-21 17:41:38,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:38,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:41:38,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:38,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:41:38,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:41:38,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:41:38,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 525 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) [2024-06-21 17:41:38,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:38,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:41:38,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:40,539 INFO L124 PetriNetUnfolderBase]: 7044/9813 cut-off events. [2024-06-21 17:41:40,540 INFO L125 PetriNetUnfolderBase]: For 36849/36849 co-relation queries the response was YES. [2024-06-21 17:41:40,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36154 conditions, 9813 events. 7044/9813 cut-off events. For 36849/36849 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51329 event pairs, 2962 based on Foata normal form. 30/9839 useless extension candidates. Maximal degree in co-relation 36125. Up to 9328 conditions per place. [2024-06-21 17:41:40,589 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 98 selfloop transitions, 28 changer transitions 0/132 dead transitions. [2024-06-21 17:41:40,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 132 transitions, 923 flow [2024-06-21 17:41:40,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:41:40,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:41:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 17:41:40,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:41:40,591 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 525 flow. Second operand 7 states and 175 transitions. [2024-06-21 17:41:40,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 132 transitions, 923 flow [2024-06-21 17:41:40,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 132 transitions, 885 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 17:41:40,623 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 586 flow [2024-06-21 17:41:40,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=586, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2024-06-21 17:41:40,623 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-21 17:41:40,624 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 586 flow [2024-06-21 17:41:40,624 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) [2024-06-21 17:41:40,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:40,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:40,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:41:40,624 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)] === [2024-06-21 17:41:40,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1450293567, now seen corresponding path program 2 times [2024-06-21 17:41:40,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:40,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742173816] [2024-06-21 17:41:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:40,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:43,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:43,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742173816] [2024-06-21 17:41:43,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742173816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:43,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:43,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:41:43,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264943403] [2024-06-21 17:41:43,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:43,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:41:43,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:43,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:41:43,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:41:43,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:41:43,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 586 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) [2024-06-21 17:41:43,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:43,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:41:43,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:45,298 INFO L124 PetriNetUnfolderBase]: 7088/9882 cut-off events. [2024-06-21 17:41:45,299 INFO L125 PetriNetUnfolderBase]: For 44937/44937 co-relation queries the response was YES. [2024-06-21 17:41:45,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38480 conditions, 9882 events. 7088/9882 cut-off events. For 44937/44937 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51533 event pairs, 3024 based on Foata normal form. 6/9880 useless extension candidates. Maximal degree in co-relation 38450. Up to 9584 conditions per place. [2024-06-21 17:41:45,345 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 93 selfloop transitions, 29 changer transitions 0/128 dead transitions. [2024-06-21 17:41:45,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 962 flow [2024-06-21 17:41:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:41:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:41:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 17:41:45,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 17:41:45,347 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 586 flow. Second operand 7 states and 169 transitions. [2024-06-21 17:41:45,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 962 flow [2024-06-21 17:41:45,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 128 transitions, 895 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 17:41:45,373 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 625 flow [2024-06-21 17:41:45,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=625, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-06-21 17:41:45,374 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-21 17:41:45,374 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 625 flow [2024-06-21 17:41:45,374 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) [2024-06-21 17:41:45,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:45,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:45,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:41:45,375 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)] === [2024-06-21 17:41:45,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:45,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1579814557, now seen corresponding path program 3 times [2024-06-21 17:41:45,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:45,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297743663] [2024-06-21 17:41:45,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:45,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:47,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:47,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297743663] [2024-06-21 17:41:47,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297743663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:47,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:47,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:41:47,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329670632] [2024-06-21 17:41:47,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:47,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:41:47,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:47,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:41:47,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:41:47,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:41:47,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 625 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) [2024-06-21 17:41:47,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:47,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:41:47,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:49,733 INFO L124 PetriNetUnfolderBase]: 7073/9861 cut-off events. [2024-06-21 17:41:49,733 INFO L125 PetriNetUnfolderBase]: For 53928/53928 co-relation queries the response was YES. [2024-06-21 17:41:49,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39905 conditions, 9861 events. 7073/9861 cut-off events. For 53928/53928 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51466 event pairs, 2662 based on Foata normal form. 6/9859 useless extension candidates. Maximal degree in co-relation 39874. Up to 9247 conditions per place. [2024-06-21 17:41:49,794 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 92 selfloop transitions, 37 changer transitions 0/135 dead transitions. [2024-06-21 17:41:49,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 135 transitions, 1033 flow [2024-06-21 17:41:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:41:49,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:41:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 17:41:49,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47527472527472525 [2024-06-21 17:41:49,796 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 625 flow. Second operand 7 states and 173 transitions. [2024-06-21 17:41:49,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 135 transitions, 1033 flow [2024-06-21 17:41:49,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 135 transitions, 953 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 17:41:49,824 INFO L231 Difference]: Finished difference. Result has 86 places, 90 transitions, 673 flow [2024-06-21 17:41:49,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=545, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=673, PETRI_PLACES=86, PETRI_TRANSITIONS=90} [2024-06-21 17:41:49,825 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-21 17:41:49,825 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 90 transitions, 673 flow [2024-06-21 17:41:49,825 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) [2024-06-21 17:41:49,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:49,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:49,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:41:49,825 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)] === [2024-06-21 17:41:49,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:49,826 INFO L85 PathProgramCache]: Analyzing trace with hash 865414209, now seen corresponding path program 1 times [2024-06-21 17:41:49,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:49,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676293130] [2024-06-21 17:41:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:49,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:51,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:51,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676293130] [2024-06-21 17:41:51,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676293130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:51,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:51,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:41:51,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121737959] [2024-06-21 17:41:51,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:51,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:41:51,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:51,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:41:51,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:41:51,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:41:51,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 90 transitions, 673 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:51,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:51,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:41:51,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:53,743 INFO L124 PetriNetUnfolderBase]: 7938/11209 cut-off events. [2024-06-21 17:41:53,768 INFO L125 PetriNetUnfolderBase]: For 70553/70553 co-relation queries the response was YES. [2024-06-21 17:41:53,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46923 conditions, 11209 events. 7938/11209 cut-off events. For 70553/70553 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 60427 event pairs, 3089 based on Foata normal form. 18/11221 useless extension candidates. Maximal degree in co-relation 46891. Up to 9939 conditions per place. [2024-06-21 17:41:53,850 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 133 selfloop transitions, 49 changer transitions 0/188 dead transitions. [2024-06-21 17:41:53,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 188 transitions, 1588 flow [2024-06-21 17:41:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:41:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:41:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 17:41:53,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 17:41:53,852 INFO L175 Difference]: Start difference. First operand has 86 places, 90 transitions, 673 flow. Second operand 8 states and 208 transitions. [2024-06-21 17:41:53,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 188 transitions, 1588 flow [2024-06-21 17:41:53,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 188 transitions, 1440 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:41:53,947 INFO L231 Difference]: Finished difference. Result has 91 places, 117 transitions, 955 flow [2024-06-21 17:41:53,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=955, PETRI_PLACES=91, PETRI_TRANSITIONS=117} [2024-06-21 17:41:53,948 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 36 predicate places. [2024-06-21 17:41:53,948 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 117 transitions, 955 flow [2024-06-21 17:41:53,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:53,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:53,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:53,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:41:53,949 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)] === [2024-06-21 17:41:53,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:53,949 INFO L85 PathProgramCache]: Analyzing trace with hash -561360003, now seen corresponding path program 2 times [2024-06-21 17:41:53,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:53,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011995665] [2024-06-21 17:41:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:53,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:41:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:41:56,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:41:56,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011995665] [2024-06-21 17:41:56,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011995665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:41:56,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:41:56,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:41:56,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870326325] [2024-06-21 17:41:56,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:41:56,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:41:56,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:41:56,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:41:56,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:41:56,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:41:56,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 117 transitions, 955 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:56,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:41:56,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:41:56,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:41:58,566 INFO L124 PetriNetUnfolderBase]: 8142/11527 cut-off events. [2024-06-21 17:41:58,567 INFO L125 PetriNetUnfolderBase]: For 88936/88938 co-relation queries the response was YES. [2024-06-21 17:41:58,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50482 conditions, 11527 events. 8142/11527 cut-off events. For 88936/88938 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 63030 event pairs, 2351 based on Foata normal form. 18/11539 useless extension candidates. Maximal degree in co-relation 50447. Up to 9394 conditions per place. [2024-06-21 17:41:58,646 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 111 selfloop transitions, 57 changer transitions 0/174 dead transitions. [2024-06-21 17:41:58,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 174 transitions, 1585 flow [2024-06-21 17:41:58,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:41:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:41:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 17:41:58,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49175824175824173 [2024-06-21 17:41:58,656 INFO L175 Difference]: Start difference. First operand has 91 places, 117 transitions, 955 flow. Second operand 7 states and 179 transitions. [2024-06-21 17:41:58,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 174 transitions, 1585 flow [2024-06-21 17:41:58,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 174 transitions, 1551 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 17:41:58,857 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 1123 flow [2024-06-21 17:41:58,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1123, PETRI_PLACES=96, PETRI_TRANSITIONS=121} [2024-06-21 17:41:58,857 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-21 17:41:58,858 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 1123 flow [2024-06-21 17:41:58,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:41:58,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:41:58,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:41:58,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:41:58,858 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)] === [2024-06-21 17:41:58,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:41:58,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1226229487, now seen corresponding path program 1 times [2024-06-21 17:41:58,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:41:58,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130487932] [2024-06-21 17:41:58,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:41:58,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:41:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:01,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:01,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130487932] [2024-06-21 17:42:01,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130487932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:01,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:01,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:42:01,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729597585] [2024-06-21 17:42:01,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:01,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:42:01,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:01,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:42:01,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:42:01,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:42:01,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 121 transitions, 1123 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:01,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:01,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:42:01,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:03,918 INFO L124 PetriNetUnfolderBase]: 8064/11433 cut-off events. [2024-06-21 17:42:03,918 INFO L125 PetriNetUnfolderBase]: For 101816/101818 co-relation queries the response was YES. [2024-06-21 17:42:03,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51538 conditions, 11433 events. 8064/11433 cut-off events. For 101816/101818 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 62592 event pairs, 2309 based on Foata normal form. 36/11463 useless extension candidates. Maximal degree in co-relation 51501. Up to 9358 conditions per place. [2024-06-21 17:42:04,006 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 108 selfloop transitions, 57 changer transitions 0/171 dead transitions. [2024-06-21 17:42:04,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 171 transitions, 1597 flow [2024-06-21 17:42:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:42:04,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:42:04,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 17:42:04,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-21 17:42:04,008 INFO L175 Difference]: Start difference. First operand has 96 places, 121 transitions, 1123 flow. Second operand 7 states and 176 transitions. [2024-06-21 17:42:04,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 171 transitions, 1597 flow [2024-06-21 17:42:04,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 171 transitions, 1498 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 17:42:04,192 INFO L231 Difference]: Finished difference. Result has 99 places, 121 transitions, 1150 flow [2024-06-21 17:42:04,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1150, PETRI_PLACES=99, PETRI_TRANSITIONS=121} [2024-06-21 17:42:04,193 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-21 17:42:04,193 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 121 transitions, 1150 flow [2024-06-21 17:42:04,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:04,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:04,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:04,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:42:04,194 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:42:04,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:04,194 INFO L85 PathProgramCache]: Analyzing trace with hash -2049363281, now seen corresponding path program 2 times [2024-06-21 17:42:04,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:04,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857176105] [2024-06-21 17:42:04,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:04,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:06,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:06,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857176105] [2024-06-21 17:42:06,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857176105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:06,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:06,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:42:06,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445468880] [2024-06-21 17:42:06,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:06,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:42:06,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:42:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:42:06,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:42:06,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 121 transitions, 1150 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:06,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:06,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:42:06,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:08,831 INFO L124 PetriNetUnfolderBase]: 8025/11364 cut-off events. [2024-06-21 17:42:08,832 INFO L125 PetriNetUnfolderBase]: For 94294/94304 co-relation queries the response was YES. [2024-06-21 17:42:08,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50865 conditions, 11364 events. 8025/11364 cut-off events. For 94294/94304 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 62012 event pairs, 1828 based on Foata normal form. 20/11359 useless extension candidates. Maximal degree in co-relation 50827. Up to 9071 conditions per place. [2024-06-21 17:42:08,904 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 99 selfloop transitions, 61 changer transitions 0/166 dead transitions. [2024-06-21 17:42:08,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 166 transitions, 1604 flow [2024-06-21 17:42:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:42:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:42:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 17:42:08,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 17:42:08,906 INFO L175 Difference]: Start difference. First operand has 99 places, 121 transitions, 1150 flow. Second operand 7 states and 168 transitions. [2024-06-21 17:42:08,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 166 transitions, 1604 flow [2024-06-21 17:42:08,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 166 transitions, 1444 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 17:42:08,988 INFO L231 Difference]: Finished difference. Result has 99 places, 122 transitions, 1131 flow [2024-06-21 17:42:08,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1131, PETRI_PLACES=99, PETRI_TRANSITIONS=122} [2024-06-21 17:42:08,990 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-21 17:42:08,990 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 122 transitions, 1131 flow [2024-06-21 17:42:08,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:42:08,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:08,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:08,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:42:08,991 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:42:09,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:09,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1309682192, now seen corresponding path program 1 times [2024-06-21 17:42:09,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:09,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109171304] [2024-06-21 17:42:09,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:09,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:10,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:10,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109171304] [2024-06-21 17:42:10,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109171304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:10,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:10,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:42:10,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199407834] [2024-06-21 17:42:10,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:10,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:42:10,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:10,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:42:10,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:42:10,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:42:10,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 122 transitions, 1131 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) [2024-06-21 17:42:10,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:10,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:42:10,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:12,833 INFO L124 PetriNetUnfolderBase]: 8051/11442 cut-off events. [2024-06-21 17:42:12,833 INFO L125 PetriNetUnfolderBase]: For 101022/101027 co-relation queries the response was YES. [2024-06-21 17:42:12,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51880 conditions, 11442 events. 8051/11442 cut-off events. For 101022/101027 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 62960 event pairs, 3276 based on Foata normal form. 10/11447 useless extension candidates. Maximal degree in co-relation 51841. Up to 11121 conditions per place. [2024-06-21 17:42:12,926 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 133 selfloop transitions, 17 changer transitions 0/156 dead transitions. [2024-06-21 17:42:12,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 156 transitions, 1611 flow [2024-06-21 17:42:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:42:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:42:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 17:42:12,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4653846153846154 [2024-06-21 17:42:12,928 INFO L175 Difference]: Start difference. First operand has 99 places, 122 transitions, 1131 flow. Second operand 5 states and 121 transitions. [2024-06-21 17:42:12,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 156 transitions, 1611 flow [2024-06-21 17:42:13,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 156 transitions, 1464 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 17:42:13,087 INFO L231 Difference]: Finished difference. Result has 100 places, 132 transitions, 1125 flow [2024-06-21 17:42:13,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1125, PETRI_PLACES=100, PETRI_TRANSITIONS=132} [2024-06-21 17:42:13,088 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-21 17:42:13,088 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 132 transitions, 1125 flow [2024-06-21 17:42:13,088 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) [2024-06-21 17:42:13,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:13,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:13,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:42:13,089 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)] === [2024-06-21 17:42:13,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1950208252, now seen corresponding path program 1 times [2024-06-21 17:42:13,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:13,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495701433] [2024-06-21 17:42:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:13,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:14,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:14,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495701433] [2024-06-21 17:42:14,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495701433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:14,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:14,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:42:14,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905880554] [2024-06-21 17:42:14,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:14,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:42:14,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:14,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:42:14,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:42:14,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:42:14,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 132 transitions, 1125 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) [2024-06-21 17:42:14,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:14,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:42:14,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:17,056 INFO L124 PetriNetUnfolderBase]: 8070/11473 cut-off events. [2024-06-21 17:42:17,056 INFO L125 PetriNetUnfolderBase]: For 112816/112824 co-relation queries the response was YES. [2024-06-21 17:42:17,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54133 conditions, 11473 events. 8070/11473 cut-off events. For 112816/112824 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 63183 event pairs, 3261 based on Foata normal form. 6/11474 useless extension candidates. Maximal degree in co-relation 54092. Up to 11195 conditions per place. [2024-06-21 17:42:17,126 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 142 selfloop transitions, 21 changer transitions 0/169 dead transitions. [2024-06-21 17:42:17,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 169 transitions, 1685 flow [2024-06-21 17:42:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:42:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:42:17,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 17:42:17,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44551282051282054 [2024-06-21 17:42:17,128 INFO L175 Difference]: Start difference. First operand has 100 places, 132 transitions, 1125 flow. Second operand 6 states and 139 transitions. [2024-06-21 17:42:17,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 169 transitions, 1685 flow [2024-06-21 17:42:17,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 169 transitions, 1649 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-21 17:42:17,236 INFO L231 Difference]: Finished difference. Result has 105 places, 140 transitions, 1240 flow [2024-06-21 17:42:17,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1240, PETRI_PLACES=105, PETRI_TRANSITIONS=140} [2024-06-21 17:42:17,237 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-21 17:42:17,237 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 140 transitions, 1240 flow [2024-06-21 17:42:17,237 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) [2024-06-21 17:42:17,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:17,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:17,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:42:17,237 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)] === [2024-06-21 17:42:17,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1258168282, now seen corresponding path program 2 times [2024-06-21 17:42:17,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:17,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171607930] [2024-06-21 17:42:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:17,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:18,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:18,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171607930] [2024-06-21 17:42:18,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171607930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:18,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:18,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:42:18,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596855913] [2024-06-21 17:42:18,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:18,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:42:18,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:18,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:42:18,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:42:18,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:42:18,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 140 transitions, 1240 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) [2024-06-21 17:42:18,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:18,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:42:18,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:20,996 INFO L124 PetriNetUnfolderBase]: 8063/11464 cut-off events. [2024-06-21 17:42:20,997 INFO L125 PetriNetUnfolderBase]: For 128011/128019 co-relation queries the response was YES. [2024-06-21 17:42:21,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56376 conditions, 11464 events. 8063/11464 cut-off events. For 128011/128019 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 63033 event pairs, 3261 based on Foata normal form. 6/11465 useless extension candidates. Maximal degree in co-relation 56332. Up to 11199 conditions per place. [2024-06-21 17:42:21,082 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 139 selfloop transitions, 17 changer transitions 0/162 dead transitions. [2024-06-21 17:42:21,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 162 transitions, 1616 flow [2024-06-21 17:42:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:42:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:42:21,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-21 17:42:21,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2024-06-21 17:42:21,084 INFO L175 Difference]: Start difference. First operand has 105 places, 140 transitions, 1240 flow. Second operand 5 states and 118 transitions. [2024-06-21 17:42:21,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 162 transitions, 1616 flow [2024-06-21 17:42:21,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 162 transitions, 1538 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-21 17:42:21,263 INFO L231 Difference]: Finished difference. Result has 108 places, 140 transitions, 1210 flow [2024-06-21 17:42:21,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1210, PETRI_PLACES=108, PETRI_TRANSITIONS=140} [2024-06-21 17:42:21,263 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 53 predicate places. [2024-06-21 17:42:21,263 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 140 transitions, 1210 flow [2024-06-21 17:42:21,263 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) [2024-06-21 17:42:21,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:21,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:21,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:42:21,264 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)] === [2024-06-21 17:42:21,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash -504496262, now seen corresponding path program 1 times [2024-06-21 17:42:21,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:21,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131130263] [2024-06-21 17:42:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:21,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:23,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:23,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131130263] [2024-06-21 17:42:23,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131130263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:23,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:23,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:42:23,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413528323] [2024-06-21 17:42:23,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:23,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:42:23,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:23,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:42:23,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:42:23,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:42:23,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 140 transitions, 1210 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) [2024-06-21 17:42:23,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:23,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:42:23,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:26,459 INFO L124 PetriNetUnfolderBase]: 8127/11541 cut-off events. [2024-06-21 17:42:26,459 INFO L125 PetriNetUnfolderBase]: For 139375/139400 co-relation queries the response was YES. [2024-06-21 17:42:26,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57512 conditions, 11541 events. 8127/11541 cut-off events. For 139375/139400 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 63466 event pairs, 2974 based on Foata normal form. 26/11558 useless extension candidates. Maximal degree in co-relation 57466. Up to 10859 conditions per place. [2024-06-21 17:42:26,548 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 138 selfloop transitions, 60 changer transitions 0/204 dead transitions. [2024-06-21 17:42:26,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 204 transitions, 2059 flow [2024-06-21 17:42:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:42:26,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:42:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 17:42:26,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489010989010989 [2024-06-21 17:42:26,550 INFO L175 Difference]: Start difference. First operand has 108 places, 140 transitions, 1210 flow. Second operand 7 states and 178 transitions. [2024-06-21 17:42:26,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 204 transitions, 2059 flow [2024-06-21 17:42:26,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 204 transitions, 2008 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:42:26,656 INFO L231 Difference]: Finished difference. Result has 111 places, 155 transitions, 1515 flow [2024-06-21 17:42:26,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1515, PETRI_PLACES=111, PETRI_TRANSITIONS=155} [2024-06-21 17:42:26,656 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-21 17:42:26,656 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 155 transitions, 1515 flow [2024-06-21 17:42:26,657 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) [2024-06-21 17:42:26,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:26,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:26,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:42:26,657 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)] === [2024-06-21 17:42:26,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:26,657 INFO L85 PathProgramCache]: Analyzing trace with hash -504227151, now seen corresponding path program 1 times [2024-06-21 17:42:26,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:26,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081534508] [2024-06-21 17:42:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:26,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:29,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:29,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081534508] [2024-06-21 17:42:29,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081534508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:29,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:29,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:42:29,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067928919] [2024-06-21 17:42:29,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:29,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:42:29,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:29,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:42:29,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:42:29,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:42:29,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 155 transitions, 1515 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) [2024-06-21 17:42:29,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:29,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:42:29,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:31,871 INFO L124 PetriNetUnfolderBase]: 8430/11956 cut-off events. [2024-06-21 17:42:31,872 INFO L125 PetriNetUnfolderBase]: For 155958/155974 co-relation queries the response was YES. [2024-06-21 17:42:31,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63435 conditions, 11956 events. 8430/11956 cut-off events. For 155958/155974 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 65636 event pairs, 2968 based on Foata normal form. 22/11975 useless extension candidates. Maximal degree in co-relation 63388. Up to 11475 conditions per place. [2024-06-21 17:42:31,972 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 185 selfloop transitions, 38 changer transitions 0/229 dead transitions. [2024-06-21 17:42:31,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 229 transitions, 2449 flow [2024-06-21 17:42:31,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:42:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:42:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 17:42:31,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:42:31,981 INFO L175 Difference]: Start difference. First operand has 111 places, 155 transitions, 1515 flow. Second operand 9 states and 208 transitions. [2024-06-21 17:42:31,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 229 transitions, 2449 flow [2024-06-21 17:42:32,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 229 transitions, 2356 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-21 17:42:32,145 INFO L231 Difference]: Finished difference. Result has 120 places, 174 transitions, 1737 flow [2024-06-21 17:42:32,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1737, PETRI_PLACES=120, PETRI_TRANSITIONS=174} [2024-06-21 17:42:32,146 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-21 17:42:32,146 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 174 transitions, 1737 flow [2024-06-21 17:42:32,146 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) [2024-06-21 17:42:32,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:32,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:32,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:42:32,147 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)] === [2024-06-21 17:42:32,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:32,147 INFO L85 PathProgramCache]: Analyzing trace with hash -504227492, now seen corresponding path program 2 times [2024-06-21 17:42:32,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:32,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538553371] [2024-06-21 17:42:32,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:32,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:35,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:35,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538553371] [2024-06-21 17:42:35,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538553371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:35,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:35,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:42:35,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231789124] [2024-06-21 17:42:35,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:35,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:42:35,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:35,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:42:35,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:42:35,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:42:35,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 174 transitions, 1737 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) [2024-06-21 17:42:35,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:35,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:42:35,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:37,510 INFO L124 PetriNetUnfolderBase]: 8525/12107 cut-off events. [2024-06-21 17:42:37,511 INFO L125 PetriNetUnfolderBase]: For 176501/176517 co-relation queries the response was YES. [2024-06-21 17:42:37,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67325 conditions, 12107 events. 8525/12107 cut-off events. For 176501/176517 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 66657 event pairs, 2986 based on Foata normal form. 18/12122 useless extension candidates. Maximal degree in co-relation 67274. Up to 11713 conditions per place. [2024-06-21 17:42:37,623 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 190 selfloop transitions, 33 changer transitions 0/229 dead transitions. [2024-06-21 17:42:37,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 229 transitions, 2512 flow [2024-06-21 17:42:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:42:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:42:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-21 17:42:37,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43990384615384615 [2024-06-21 17:42:37,625 INFO L175 Difference]: Start difference. First operand has 120 places, 174 transitions, 1737 flow. Second operand 8 states and 183 transitions. [2024-06-21 17:42:37,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 229 transitions, 2512 flow [2024-06-21 17:42:37,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 229 transitions, 2406 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 17:42:37,895 INFO L231 Difference]: Finished difference. Result has 126 places, 184 transitions, 1859 flow [2024-06-21 17:42:37,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1859, PETRI_PLACES=126, PETRI_TRANSITIONS=184} [2024-06-21 17:42:37,896 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-21 17:42:37,896 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 184 transitions, 1859 flow [2024-06-21 17:42:37,896 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) [2024-06-21 17:42:37,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:37,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:37,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:42:37,897 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)] === [2024-06-21 17:42:37,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash -348307091, now seen corresponding path program 2 times [2024-06-21 17:42:37,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:37,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33308379] [2024-06-21 17:42:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:37,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:40,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:40,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33308379] [2024-06-21 17:42:40,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33308379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:40,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:40,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:42:40,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731429942] [2024-06-21 17:42:40,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:40,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:42:40,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:40,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:42:40,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:42:40,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:42:40,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 184 transitions, 1859 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) [2024-06-21 17:42:40,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:40,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:42:40,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:42,816 INFO L124 PetriNetUnfolderBase]: 8639/12258 cut-off events. [2024-06-21 17:42:42,816 INFO L125 PetriNetUnfolderBase]: For 188821/188907 co-relation queries the response was YES. [2024-06-21 17:42:42,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68748 conditions, 12258 events. 8639/12258 cut-off events. For 188821/188907 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 67477 event pairs, 2978 based on Foata normal form. 56/12305 useless extension candidates. Maximal degree in co-relation 68694. Up to 11484 conditions per place. [2024-06-21 17:42:42,917 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 178 selfloop transitions, 55 changer transitions 0/239 dead transitions. [2024-06-21 17:42:42,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 239 transitions, 2796 flow [2024-06-21 17:42:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:42:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:42:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 17:42:42,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 17:42:42,919 INFO L175 Difference]: Start difference. First operand has 126 places, 184 transitions, 1859 flow. Second operand 6 states and 147 transitions. [2024-06-21 17:42:42,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 239 transitions, 2796 flow [2024-06-21 17:42:43,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 239 transitions, 2696 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 17:42:43,229 INFO L231 Difference]: Finished difference. Result has 128 places, 203 transitions, 2163 flow [2024-06-21 17:42:43,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2163, PETRI_PLACES=128, PETRI_TRANSITIONS=203} [2024-06-21 17:42:43,229 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-21 17:42:43,230 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 203 transitions, 2163 flow [2024-06-21 17:42:43,230 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) [2024-06-21 17:42:43,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:43,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:43,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:42:43,230 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)] === [2024-06-21 17:42:43,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:43,231 INFO L85 PathProgramCache]: Analyzing trace with hash -348693041, now seen corresponding path program 3 times [2024-06-21 17:42:43,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:43,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420431311] [2024-06-21 17:42:43,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:43,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:45,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:45,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420431311] [2024-06-21 17:42:45,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420431311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:45,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:45,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:42:45,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498312904] [2024-06-21 17:42:45,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:45,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:42:45,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:45,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:42:45,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:42:45,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:42:45,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 203 transitions, 2163 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) [2024-06-21 17:42:45,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:45,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:42:45,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:48,249 INFO L124 PetriNetUnfolderBase]: 8621/12231 cut-off events. [2024-06-21 17:42:48,249 INFO L125 PetriNetUnfolderBase]: For 212783/212799 co-relation queries the response was YES. [2024-06-21 17:42:48,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72017 conditions, 12231 events. 8621/12231 cut-off events. For 212783/212799 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 67441 event pairs, 2976 based on Foata normal form. 22/12250 useless extension candidates. Maximal degree in co-relation 71961. Up to 11716 conditions per place. [2024-06-21 17:42:48,349 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 196 selfloop transitions, 41 changer transitions 0/243 dead transitions. [2024-06-21 17:42:48,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 243 transitions, 2807 flow [2024-06-21 17:42:48,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:42:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:42:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 17:42:48,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-21 17:42:48,355 INFO L175 Difference]: Start difference. First operand has 128 places, 203 transitions, 2163 flow. Second operand 7 states and 164 transitions. [2024-06-21 17:42:48,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 243 transitions, 2807 flow [2024-06-21 17:42:48,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 243 transitions, 2717 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-06-21 17:42:48,735 INFO L231 Difference]: Finished difference. Result has 135 places, 204 transitions, 2208 flow [2024-06-21 17:42:48,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2208, PETRI_PLACES=135, PETRI_TRANSITIONS=204} [2024-06-21 17:42:48,735 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-21 17:42:48,735 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 204 transitions, 2208 flow [2024-06-21 17:42:48,736 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) [2024-06-21 17:42:48,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:48,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:48,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:42:48,736 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)] === [2024-06-21 17:42:48,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:48,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1680834266, now seen corresponding path program 3 times [2024-06-21 17:42:48,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:48,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981712471] [2024-06-21 17:42:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:48,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:51,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:51,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981712471] [2024-06-21 17:42:51,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981712471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:51,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:51,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:42:51,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390075562] [2024-06-21 17:42:51,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:51,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:42:51,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:51,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:42:51,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:42:51,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:42:51,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 204 transitions, 2208 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) [2024-06-21 17:42:51,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:51,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:42:51,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:54,376 INFO L124 PetriNetUnfolderBase]: 8690/12342 cut-off events. [2024-06-21 17:42:54,377 INFO L125 PetriNetUnfolderBase]: For 217085/217098 co-relation queries the response was YES. [2024-06-21 17:42:54,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71344 conditions, 12342 events. 8690/12342 cut-off events. For 217085/217098 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 68153 event pairs, 2998 based on Foata normal form. 16/12355 useless extension candidates. Maximal degree in co-relation 71284. Up to 11634 conditions per place. [2024-06-21 17:42:54,492 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 195 selfloop transitions, 74 changer transitions 0/275 dead transitions. [2024-06-21 17:42:54,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 275 transitions, 3146 flow [2024-06-21 17:42:54,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:42:54,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:42:54,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 17:42:54,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-21 17:42:54,494 INFO L175 Difference]: Start difference. First operand has 135 places, 204 transitions, 2208 flow. Second operand 8 states and 202 transitions. [2024-06-21 17:42:54,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 275 transitions, 3146 flow [2024-06-21 17:42:54,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 275 transitions, 3046 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 17:42:54,837 INFO L231 Difference]: Finished difference. Result has 140 places, 213 transitions, 2467 flow [2024-06-21 17:42:54,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2467, PETRI_PLACES=140, PETRI_TRANSITIONS=213} [2024-06-21 17:42:54,838 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-21 17:42:54,838 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 213 transitions, 2467 flow [2024-06-21 17:42:54,838 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) [2024-06-21 17:42:54,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:42:54,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:42:54,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:42:54,838 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)] === [2024-06-21 17:42:54,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:42:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash -326911119, now seen corresponding path program 1 times [2024-06-21 17:42:54,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:42:54,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760614950] [2024-06-21 17:42:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:42:54,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:42:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:42:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:42:56,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:42:56,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760614950] [2024-06-21 17:42:56,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760614950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:42:56,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:42:56,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:42:56,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484125514] [2024-06-21 17:42:56,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:42:56,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:42:56,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:42:56,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:42:56,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:42:57,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:42:57,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 213 transitions, 2467 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) [2024-06-21 17:42:57,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:42:57,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:42:57,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:42:59,811 INFO L124 PetriNetUnfolderBase]: 8834/12531 cut-off events. [2024-06-21 17:42:59,812 INFO L125 PetriNetUnfolderBase]: For 233688/233693 co-relation queries the response was YES. [2024-06-21 17:42:59,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73623 conditions, 12531 events. 8834/12531 cut-off events. For 233688/233693 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 69022 event pairs, 3230 based on Foata normal form. 10/12534 useless extension candidates. Maximal degree in co-relation 73561. Up to 11888 conditions per place. [2024-06-21 17:42:59,914 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 232 selfloop transitions, 37 changer transitions 0/275 dead transitions. [2024-06-21 17:42:59,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 275 transitions, 3521 flow [2024-06-21 17:42:59,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:42:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:42:59,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 17:42:59,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:42:59,932 INFO L175 Difference]: Start difference. First operand has 140 places, 213 transitions, 2467 flow. Second operand 7 states and 175 transitions. [2024-06-21 17:42:59,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 275 transitions, 3521 flow [2024-06-21 17:43:00,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 275 transitions, 3375 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 17:43:00,342 INFO L231 Difference]: Finished difference. Result has 144 places, 228 transitions, 2613 flow [2024-06-21 17:43:00,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2329, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2613, PETRI_PLACES=144, PETRI_TRANSITIONS=228} [2024-06-21 17:43:00,343 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-06-21 17:43:00,343 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 228 transitions, 2613 flow [2024-06-21 17:43:00,343 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) [2024-06-21 17:43:00,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:00,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:00,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:43:00,344 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)] === [2024-06-21 17:43:00,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:00,344 INFO L85 PathProgramCache]: Analyzing trace with hash -348301139, now seen corresponding path program 2 times [2024-06-21 17:43:00,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:00,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721824202] [2024-06-21 17:43:00,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:00,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:02,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:02,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721824202] [2024-06-21 17:43:02,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721824202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:02,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:02,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:43:02,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015207210] [2024-06-21 17:43:02,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:02,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:43:02,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:02,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:43:02,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:43:02,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:43:02,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 228 transitions, 2613 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) [2024-06-21 17:43:02,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:02,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:43:02,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:05,569 INFO L124 PetriNetUnfolderBase]: 8956/12699 cut-off events. [2024-06-21 17:43:05,570 INFO L125 PetriNetUnfolderBase]: For 246473/246478 co-relation queries the response was YES. [2024-06-21 17:43:05,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77246 conditions, 12699 events. 8956/12699 cut-off events. For 246473/246478 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 69966 event pairs, 3221 based on Foata normal form. 10/12704 useless extension candidates. Maximal degree in co-relation 77181. Up to 12084 conditions per place. [2024-06-21 17:43:05,675 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 246 selfloop transitions, 39 changer transitions 0/291 dead transitions. [2024-06-21 17:43:05,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 291 transitions, 3685 flow [2024-06-21 17:43:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:43:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:43:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 17:43:05,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-21 17:43:05,677 INFO L175 Difference]: Start difference. First operand has 144 places, 228 transitions, 2613 flow. Second operand 8 states and 196 transitions. [2024-06-21 17:43:05,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 291 transitions, 3685 flow [2024-06-21 17:43:06,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 291 transitions, 3578 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-21 17:43:06,049 INFO L231 Difference]: Finished difference. Result has 151 places, 239 transitions, 2785 flow [2024-06-21 17:43:06,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2785, PETRI_PLACES=151, PETRI_TRANSITIONS=239} [2024-06-21 17:43:06,050 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-21 17:43:06,050 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 239 transitions, 2785 flow [2024-06-21 17:43:06,050 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) [2024-06-21 17:43:06,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:06,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:06,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:43:06,051 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)] === [2024-06-21 17:43:06,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:06,051 INFO L85 PathProgramCache]: Analyzing trace with hash -348508529, now seen corresponding path program 3 times [2024-06-21 17:43:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:06,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794931428] [2024-06-21 17:43:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:06,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:08,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:08,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794931428] [2024-06-21 17:43:08,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794931428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:08,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:08,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:43:08,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552351408] [2024-06-21 17:43:08,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:08,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:43:08,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:08,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:43:08,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:43:08,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:43:08,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 239 transitions, 2785 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) [2024-06-21 17:43:08,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:08,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:43:08,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:10,912 INFO L124 PetriNetUnfolderBase]: 8938/12685 cut-off events. [2024-06-21 17:43:10,912 INFO L125 PetriNetUnfolderBase]: For 263246/263251 co-relation queries the response was YES. [2024-06-21 17:43:11,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78017 conditions, 12685 events. 8938/12685 cut-off events. For 263246/263251 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 69992 event pairs, 3245 based on Foata normal form. 10/12688 useless extension candidates. Maximal degree in co-relation 77949. Up to 12074 conditions per place. [2024-06-21 17:43:11,063 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 234 selfloop transitions, 35 changer transitions 0/275 dead transitions. [2024-06-21 17:43:11,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 275 transitions, 3531 flow [2024-06-21 17:43:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:43:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:43:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 17:43:11,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-21 17:43:11,065 INFO L175 Difference]: Start difference. First operand has 151 places, 239 transitions, 2785 flow. Second operand 6 states and 150 transitions. [2024-06-21 17:43:11,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 275 transitions, 3531 flow [2024-06-21 17:43:11,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 275 transitions, 3380 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 17:43:11,646 INFO L231 Difference]: Finished difference. Result has 153 places, 239 transitions, 2715 flow [2024-06-21 17:43:11,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2715, PETRI_PLACES=153, PETRI_TRANSITIONS=239} [2024-06-21 17:43:11,647 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-21 17:43:11,647 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 239 transitions, 2715 flow [2024-06-21 17:43:11,647 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) [2024-06-21 17:43:11,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:11,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:11,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:43:11,648 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)] === [2024-06-21 17:43:11,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:11,648 INFO L85 PathProgramCache]: Analyzing trace with hash -348293203, now seen corresponding path program 1 times [2024-06-21 17:43:11,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:11,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309567710] [2024-06-21 17:43:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:11,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:14,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:14,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309567710] [2024-06-21 17:43:14,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309567710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:14,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:14,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:14,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961916133] [2024-06-21 17:43:14,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:14,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:14,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:14,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:14,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:14,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:43:14,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 239 transitions, 2715 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) [2024-06-21 17:43:14,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:14,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:43:14,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:17,045 INFO L124 PetriNetUnfolderBase]: 9022/12799 cut-off events. [2024-06-21 17:43:17,045 INFO L125 PetriNetUnfolderBase]: For 279528/279533 co-relation queries the response was YES. [2024-06-21 17:43:17,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79119 conditions, 12799 events. 9022/12799 cut-off events. For 279528/279533 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 70658 event pairs, 3222 based on Foata normal form. 18/12812 useless extension candidates. Maximal degree in co-relation 79049. Up to 12296 conditions per place. [2024-06-21 17:43:17,161 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 251 selfloop transitions, 20 changer transitions 0/277 dead transitions. [2024-06-21 17:43:17,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 277 transitions, 3491 flow [2024-06-21 17:43:17,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:43:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:43:17,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 17:43:17,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46474358974358976 [2024-06-21 17:43:17,163 INFO L175 Difference]: Start difference. First operand has 153 places, 239 transitions, 2715 flow. Second operand 6 states and 145 transitions. [2024-06-21 17:43:17,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 277 transitions, 3491 flow [2024-06-21 17:43:17,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 277 transitions, 3421 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 17:43:17,604 INFO L231 Difference]: Finished difference. Result has 154 places, 242 transitions, 2764 flow [2024-06-21 17:43:17,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2764, PETRI_PLACES=154, PETRI_TRANSITIONS=242} [2024-06-21 17:43:17,609 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-21 17:43:17,609 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 242 transitions, 2764 flow [2024-06-21 17:43:17,609 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) [2024-06-21 17:43:17,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:17,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:17,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:43:17,610 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)] === [2024-06-21 17:43:17,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash -692264335, now seen corresponding path program 1 times [2024-06-21 17:43:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:17,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841037945] [2024-06-21 17:43:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:17,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:20,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:20,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841037945] [2024-06-21 17:43:20,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841037945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:20,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:20,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:20,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438604576] [2024-06-21 17:43:20,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:20,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:20,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:20,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:20,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:20,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:43:20,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 242 transitions, 2764 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) [2024-06-21 17:43:20,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:20,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:43:20,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:24,092 INFO L124 PetriNetUnfolderBase]: 9870/13932 cut-off events. [2024-06-21 17:43:24,092 INFO L125 PetriNetUnfolderBase]: For 329071/329097 co-relation queries the response was YES. [2024-06-21 17:43:24,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88093 conditions, 13932 events. 9870/13932 cut-off events. For 329071/329097 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 77276 event pairs, 3096 based on Foata normal form. 38/13961 useless extension candidates. Maximal degree in co-relation 88022. Up to 11984 conditions per place. [2024-06-21 17:43:24,238 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 225 selfloop transitions, 117 changer transitions 0/348 dead transitions. [2024-06-21 17:43:24,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 348 transitions, 4513 flow [2024-06-21 17:43:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:43:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:43:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 276 transitions. [2024-06-21 17:43:24,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825174825174825 [2024-06-21 17:43:24,240 INFO L175 Difference]: Start difference. First operand has 154 places, 242 transitions, 2764 flow. Second operand 11 states and 276 transitions. [2024-06-21 17:43:24,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 348 transitions, 4513 flow [2024-06-21 17:43:24,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 348 transitions, 4430 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 17:43:24,824 INFO L231 Difference]: Finished difference. Result has 164 places, 265 transitions, 3281 flow [2024-06-21 17:43:24,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2681, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3281, PETRI_PLACES=164, PETRI_TRANSITIONS=265} [2024-06-21 17:43:24,826 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2024-06-21 17:43:24,826 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 265 transitions, 3281 flow [2024-06-21 17:43:24,826 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) [2024-06-21 17:43:24,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:24,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:24,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:43:24,827 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)] === [2024-06-21 17:43:24,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:24,827 INFO L85 PathProgramCache]: Analyzing trace with hash 16377265, now seen corresponding path program 1 times [2024-06-21 17:43:24,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:24,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162770779] [2024-06-21 17:43:24,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:24,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:27,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:27,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162770779] [2024-06-21 17:43:27,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162770779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:27,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:27,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:43:27,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841907363] [2024-06-21 17:43:27,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:27,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:43:27,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:43:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:43:27,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:43:27,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 265 transitions, 3281 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) [2024-06-21 17:43:27,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:27,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:43:27,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:30,742 INFO L124 PetriNetUnfolderBase]: 9934/14022 cut-off events. [2024-06-21 17:43:30,742 INFO L125 PetriNetUnfolderBase]: For 370025/370039 co-relation queries the response was YES. [2024-06-21 17:43:30,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94901 conditions, 14022 events. 9934/14022 cut-off events. For 370025/370039 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 77726 event pairs, 3207 based on Foata normal form. 12/14027 useless extension candidates. Maximal degree in co-relation 94826. Up to 13095 conditions per place. [2024-06-21 17:43:30,884 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 225 selfloop transitions, 91 changer transitions 0/322 dead transitions. [2024-06-21 17:43:30,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 322 transitions, 4481 flow [2024-06-21 17:43:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:43:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:43:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 17:43:30,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-21 17:43:30,885 INFO L175 Difference]: Start difference. First operand has 164 places, 265 transitions, 3281 flow. Second operand 7 states and 174 transitions. [2024-06-21 17:43:30,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 322 transitions, 4481 flow [2024-06-21 17:43:31,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 322 transitions, 4221 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-21 17:43:31,456 INFO L231 Difference]: Finished difference. Result has 167 places, 277 transitions, 3478 flow [2024-06-21 17:43:31,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3035, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3478, PETRI_PLACES=167, PETRI_TRANSITIONS=277} [2024-06-21 17:43:31,456 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2024-06-21 17:43:31,456 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 277 transitions, 3478 flow [2024-06-21 17:43:31,457 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) [2024-06-21 17:43:31,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:31,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:31,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:43:31,457 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)] === [2024-06-21 17:43:31,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:31,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1544181509, now seen corresponding path program 2 times [2024-06-21 17:43:31,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:31,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638825126] [2024-06-21 17:43:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:31,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:34,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:34,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638825126] [2024-06-21 17:43:34,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638825126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:34,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:34,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:43:34,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097284121] [2024-06-21 17:43:34,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:34,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:43:34,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:34,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:43:34,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:43:34,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:43:34,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 277 transitions, 3478 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) [2024-06-21 17:43:34,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:34,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:43:34,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:37,308 INFO L124 PetriNetUnfolderBase]: 9915/14009 cut-off events. [2024-06-21 17:43:37,309 INFO L125 PetriNetUnfolderBase]: For 382773/382786 co-relation queries the response was YES. [2024-06-21 17:43:37,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94756 conditions, 14009 events. 9915/14009 cut-off events. For 382773/382786 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 77822 event pairs, 3160 based on Foata normal form. 16/14022 useless extension candidates. Maximal degree in co-relation 94678. Up to 13523 conditions per place. [2024-06-21 17:43:37,451 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 281 selfloop transitions, 33 changer transitions 0/320 dead transitions. [2024-06-21 17:43:37,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 320 transitions, 4235 flow [2024-06-21 17:43:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:43:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:43:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 17:43:37,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43509615384615385 [2024-06-21 17:43:37,453 INFO L175 Difference]: Start difference. First operand has 167 places, 277 transitions, 3478 flow. Second operand 8 states and 181 transitions. [2024-06-21 17:43:37,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 320 transitions, 4235 flow [2024-06-21 17:43:38,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 320 transitions, 4064 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 17:43:38,056 INFO L231 Difference]: Finished difference. Result has 172 places, 277 transitions, 3384 flow [2024-06-21 17:43:38,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3307, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3384, PETRI_PLACES=172, PETRI_TRANSITIONS=277} [2024-06-21 17:43:38,057 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 117 predicate places. [2024-06-21 17:43:38,057 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 277 transitions, 3384 flow [2024-06-21 17:43:38,057 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) [2024-06-21 17:43:38,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:38,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:38,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:43:38,058 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:43:38,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:38,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1548829711, now seen corresponding path program 2 times [2024-06-21 17:43:38,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:38,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701394859] [2024-06-21 17:43:38,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:38,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:40,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701394859] [2024-06-21 17:43:40,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701394859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:40,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:40,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:40,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55180938] [2024-06-21 17:43:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:40,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:40,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:40,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:40,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:41,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:43:41,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 277 transitions, 3384 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) [2024-06-21 17:43:41,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:41,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:43:41,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:44,914 INFO L124 PetriNetUnfolderBase]: 10729/15115 cut-off events. [2024-06-21 17:43:44,915 INFO L125 PetriNetUnfolderBase]: For 436199/436212 co-relation queries the response was YES. [2024-06-21 17:43:45,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102658 conditions, 15115 events. 10729/15115 cut-off events. For 436199/436212 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 84331 event pairs, 3154 based on Foata normal form. 28/15140 useless extension candidates. Maximal degree in co-relation 102579. Up to 13770 conditions per place. [2024-06-21 17:43:45,082 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 302 selfloop transitions, 73 changer transitions 0/381 dead transitions. [2024-06-21 17:43:45,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 381 transitions, 4981 flow [2024-06-21 17:43:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:43:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:43:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2024-06-21 17:43:45,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-21 17:43:45,084 INFO L175 Difference]: Start difference. First operand has 172 places, 277 transitions, 3384 flow. Second operand 12 states and 282 transitions. [2024-06-21 17:43:45,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 381 transitions, 4981 flow [2024-06-21 17:43:45,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 381 transitions, 4915 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:43:45,806 INFO L231 Difference]: Finished difference. Result has 179 places, 302 transitions, 3840 flow [2024-06-21 17:43:45,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3840, PETRI_PLACES=179, PETRI_TRANSITIONS=302} [2024-06-21 17:43:45,807 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 124 predicate places. [2024-06-21 17:43:45,808 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 302 transitions, 3840 flow [2024-06-21 17:43:45,808 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) [2024-06-21 17:43:45,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:45,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:45,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:43:45,808 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:43:45,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:45,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1548819481, now seen corresponding path program 3 times [2024-06-21 17:43:45,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:45,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095824300] [2024-06-21 17:43:45,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:45,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:49,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:49,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095824300] [2024-06-21 17:43:49,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095824300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:49,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:49,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:43:49,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059606589] [2024-06-21 17:43:49,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:49,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:43:49,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:49,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:43:49,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:43:49,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:43:49,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 302 transitions, 3840 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) [2024-06-21 17:43:49,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:49,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:43:49,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:43:53,055 INFO L124 PetriNetUnfolderBase]: 10693/15054 cut-off events. [2024-06-21 17:43:53,056 INFO L125 PetriNetUnfolderBase]: For 467022/467035 co-relation queries the response was YES. [2024-06-21 17:43:53,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105397 conditions, 15054 events. 10693/15054 cut-off events. For 467022/467035 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 83777 event pairs, 3195 based on Foata normal form. 28/15079 useless extension candidates. Maximal degree in co-relation 105315. Up to 13754 conditions per place. [2024-06-21 17:43:53,279 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 300 selfloop transitions, 74 changer transitions 0/380 dead transitions. [2024-06-21 17:43:53,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 380 transitions, 5207 flow [2024-06-21 17:43:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:43:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:43:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-21 17:43:53,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-21 17:43:53,300 INFO L175 Difference]: Start difference. First operand has 179 places, 302 transitions, 3840 flow. Second operand 11 states and 264 transitions. [2024-06-21 17:43:53,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 380 transitions, 5207 flow [2024-06-21 17:43:54,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 380 transitions, 5025 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-21 17:43:54,549 INFO L231 Difference]: Finished difference. Result has 185 places, 307 transitions, 3996 flow [2024-06-21 17:43:54,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3676, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3996, PETRI_PLACES=185, PETRI_TRANSITIONS=307} [2024-06-21 17:43:54,550 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-06-21 17:43:54,550 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 307 transitions, 3996 flow [2024-06-21 17:43:54,550 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) [2024-06-21 17:43:54,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:43:54,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:43:54,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:43:54,551 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:43:54,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:43:54,551 INFO L85 PathProgramCache]: Analyzing trace with hash 973769961, now seen corresponding path program 3 times [2024-06-21 17:43:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:43:54,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74680657] [2024-06-21 17:43:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:43:54,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:43:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:43:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:43:57,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:43:57,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74680657] [2024-06-21 17:43:57,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74680657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:43:57,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:43:57,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:43:57,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762825077] [2024-06-21 17:43:57,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:43:57,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:43:57,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:43:57,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:43:57,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:43:57,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:43:57,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 307 transitions, 3996 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) [2024-06-21 17:43:57,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:43:57,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:43:57,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:01,273 INFO L124 PetriNetUnfolderBase]: 10712/15074 cut-off events. [2024-06-21 17:44:01,274 INFO L125 PetriNetUnfolderBase]: For 487789/487853 co-relation queries the response was YES. [2024-06-21 17:44:01,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107064 conditions, 15074 events. 10712/15074 cut-off events. For 487789/487853 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 83847 event pairs, 3364 based on Foata normal form. 24/15078 useless extension candidates. Maximal degree in co-relation 106978. Up to 14096 conditions per place. [2024-06-21 17:44:01,453 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 252 selfloop transitions, 98 changer transitions 0/356 dead transitions. [2024-06-21 17:44:01,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 356 transitions, 5264 flow [2024-06-21 17:44:01,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:44:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:44:01,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 17:44:01,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-21 17:44:01,463 INFO L175 Difference]: Start difference. First operand has 185 places, 307 transitions, 3996 flow. Second operand 7 states and 172 transitions. [2024-06-21 17:44:01,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 356 transitions, 5264 flow [2024-06-21 17:44:02,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 356 transitions, 5152 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 17:44:02,351 INFO L231 Difference]: Finished difference. Result has 186 places, 311 transitions, 4166 flow [2024-06-21 17:44:02,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3884, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4166, PETRI_PLACES=186, PETRI_TRANSITIONS=311} [2024-06-21 17:44:02,358 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 131 predicate places. [2024-06-21 17:44:02,358 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 311 transitions, 4166 flow [2024-06-21 17:44:02,358 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) [2024-06-21 17:44:02,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:02,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:02,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:44:02,358 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:44:02,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:02,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1434092539, now seen corresponding path program 4 times [2024-06-21 17:44:02,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:02,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335786938] [2024-06-21 17:44:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:02,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:05,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:05,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335786938] [2024-06-21 17:44:05,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335786938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:05,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:05,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:44:05,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962992488] [2024-06-21 17:44:05,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:05,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:44:05,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:05,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:44:05,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:44:05,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:44:05,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 311 transitions, 4166 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) [2024-06-21 17:44:05,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:05,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:44:05,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:09,172 INFO L124 PetriNetUnfolderBase]: 10705/15040 cut-off events. [2024-06-21 17:44:09,173 INFO L125 PetriNetUnfolderBase]: For 508537/508589 co-relation queries the response was YES. [2024-06-21 17:44:09,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107944 conditions, 15040 events. 10705/15040 cut-off events. For 508537/508589 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 83329 event pairs, 3346 based on Foata normal form. 20/15041 useless extension candidates. Maximal degree in co-relation 107856. Up to 14091 conditions per place. [2024-06-21 17:44:09,331 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 244 selfloop transitions, 99 changer transitions 0/349 dead transitions. [2024-06-21 17:44:09,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 349 transitions, 5210 flow [2024-06-21 17:44:09,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:44:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:44:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-21 17:44:09,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-21 17:44:09,333 INFO L175 Difference]: Start difference. First operand has 186 places, 311 transitions, 4166 flow. Second operand 7 states and 167 transitions. [2024-06-21 17:44:09,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 349 transitions, 5210 flow [2024-06-21 17:44:10,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 349 transitions, 4818 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 17:44:10,220 INFO L231 Difference]: Finished difference. Result has 186 places, 311 transitions, 3981 flow [2024-06-21 17:44:10,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3774, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3981, PETRI_PLACES=186, PETRI_TRANSITIONS=311} [2024-06-21 17:44:10,220 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 131 predicate places. [2024-06-21 17:44:10,220 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 311 transitions, 3981 flow [2024-06-21 17:44:10,220 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) [2024-06-21 17:44:10,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:10,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:10,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:44:10,221 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:44:10,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:10,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2075413253, now seen corresponding path program 5 times [2024-06-21 17:44:10,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:10,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986713354] [2024-06-21 17:44:10,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:10,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:12,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:12,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986713354] [2024-06-21 17:44:12,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986713354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:12,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:12,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:44:12,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747354981] [2024-06-21 17:44:12,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:12,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:44:12,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:44:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:44:12,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:44:12,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 311 transitions, 3981 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) [2024-06-21 17:44:12,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:12,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:44:12,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:16,750 INFO L124 PetriNetUnfolderBase]: 10691/15085 cut-off events. [2024-06-21 17:44:16,750 INFO L125 PetriNetUnfolderBase]: For 521369/521382 co-relation queries the response was YES. [2024-06-21 17:44:16,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107865 conditions, 15085 events. 10691/15085 cut-off events. For 521369/521382 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 84350 event pairs, 3289 based on Foata normal form. 16/15098 useless extension candidates. Maximal degree in co-relation 107777. Up to 14224 conditions per place. [2024-06-21 17:44:16,929 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 291 selfloop transitions, 76 changer transitions 0/373 dead transitions. [2024-06-21 17:44:16,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 373 transitions, 5030 flow [2024-06-21 17:44:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:44:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:44:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 17:44:16,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879807692307692 [2024-06-21 17:44:16,931 INFO L175 Difference]: Start difference. First operand has 186 places, 311 transitions, 3981 flow. Second operand 8 states and 203 transitions. [2024-06-21 17:44:16,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 373 transitions, 5030 flow [2024-06-21 17:44:18,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 373 transitions, 4783 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 17:44:18,016 INFO L231 Difference]: Finished difference. Result has 189 places, 311 transitions, 3915 flow [2024-06-21 17:44:18,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3734, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3915, PETRI_PLACES=189, PETRI_TRANSITIONS=311} [2024-06-21 17:44:18,016 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 134 predicate places. [2024-06-21 17:44:18,017 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 311 transitions, 3915 flow [2024-06-21 17:44:18,017 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) [2024-06-21 17:44:18,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:18,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:18,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:44:18,017 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:44:18,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:18,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2081127173, now seen corresponding path program 6 times [2024-06-21 17:44:18,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:18,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714042000] [2024-06-21 17:44:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:18,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:20,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:20,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714042000] [2024-06-21 17:44:20,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714042000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:20,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:20,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:44:20,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15050900] [2024-06-21 17:44:20,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:20,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:44:20,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:20,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:44:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:44:20,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:44:20,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 311 transitions, 3915 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) [2024-06-21 17:44:20,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:20,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:44:20,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:24,223 INFO L124 PetriNetUnfolderBase]: 10679/15062 cut-off events. [2024-06-21 17:44:24,223 INFO L125 PetriNetUnfolderBase]: For 545437/545517 co-relation queries the response was YES. [2024-06-21 17:44:24,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108374 conditions, 15062 events. 10679/15062 cut-off events. For 545437/545517 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 84129 event pairs, 3292 based on Foata normal form. 51/15104 useless extension candidates. Maximal degree in co-relation 108285. Up to 14212 conditions per place. [2024-06-21 17:44:24,399 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 278 selfloop transitions, 76 changer transitions 0/360 dead transitions. [2024-06-21 17:44:24,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 360 transitions, 4778 flow [2024-06-21 17:44:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:44:24,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:44:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 17:44:24,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-21 17:44:24,401 INFO L175 Difference]: Start difference. First operand has 189 places, 311 transitions, 3915 flow. Second operand 7 states and 174 transitions. [2024-06-21 17:44:24,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 360 transitions, 4778 flow [2024-06-21 17:44:25,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 360 transitions, 4601 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 17:44:25,465 INFO L231 Difference]: Finished difference. Result has 189 places, 311 transitions, 3907 flow [2024-06-21 17:44:25,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3738, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3907, PETRI_PLACES=189, PETRI_TRANSITIONS=311} [2024-06-21 17:44:25,466 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 134 predicate places. [2024-06-21 17:44:25,466 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 311 transitions, 3907 flow [2024-06-21 17:44:25,466 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) [2024-06-21 17:44:25,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:25,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:25,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:44:25,466 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:44:25,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:25,467 INFO L85 PathProgramCache]: Analyzing trace with hash 2075419825, now seen corresponding path program 4 times [2024-06-21 17:44:25,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:25,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737048927] [2024-06-21 17:44:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:25,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:28,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:28,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737048927] [2024-06-21 17:44:28,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737048927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:28,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:28,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:44:28,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726330380] [2024-06-21 17:44:28,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:28,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:44:28,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:28,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:44:28,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:44:28,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:44:28,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 311 transitions, 3907 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) [2024-06-21 17:44:28,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:28,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:44:28,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:32,955 INFO L124 PetriNetUnfolderBase]: 11773/16577 cut-off events. [2024-06-21 17:44:32,955 INFO L125 PetriNetUnfolderBase]: For 569073/569086 co-relation queries the response was YES. [2024-06-21 17:44:33,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118863 conditions, 16577 events. 11773/16577 cut-off events. For 569073/569086 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 93564 event pairs, 3234 based on Foata normal form. 28/16602 useless extension candidates. Maximal degree in co-relation 118775. Up to 14141 conditions per place. [2024-06-21 17:44:33,155 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 296 selfloop transitions, 139 changer transitions 0/441 dead transitions. [2024-06-21 17:44:33,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 441 transitions, 6054 flow [2024-06-21 17:44:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:44:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:44:33,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-21 17:44:33,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 17:44:33,157 INFO L175 Difference]: Start difference. First operand has 189 places, 311 transitions, 3907 flow. Second operand 10 states and 247 transitions. [2024-06-21 17:44:33,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 441 transitions, 6054 flow [2024-06-21 17:44:34,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 441 transitions, 5805 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 17:44:34,311 INFO L231 Difference]: Finished difference. Result has 192 places, 364 transitions, 4866 flow [2024-06-21 17:44:34,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3664, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4866, PETRI_PLACES=192, PETRI_TRANSITIONS=364} [2024-06-21 17:44:34,312 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 137 predicate places. [2024-06-21 17:44:34,312 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 364 transitions, 4866 flow [2024-06-21 17:44:34,312 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) [2024-06-21 17:44:34,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:34,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:34,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:44:34,313 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:44:34,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:34,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2087384275, now seen corresponding path program 5 times [2024-06-21 17:44:34,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:34,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893565265] [2024-06-21 17:44:34,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:34,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:37,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:37,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893565265] [2024-06-21 17:44:37,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893565265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:37,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:37,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:44:37,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78514760] [2024-06-21 17:44:37,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:37,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:44:37,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:37,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:44:37,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:44:37,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:44:37,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 364 transitions, 4866 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) [2024-06-21 17:44:37,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:37,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:44:37,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:42,180 INFO L124 PetriNetUnfolderBase]: 12409/17536 cut-off events. [2024-06-21 17:44:42,181 INFO L125 PetriNetUnfolderBase]: For 604913/604993 co-relation queries the response was YES. [2024-06-21 17:44:42,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129158 conditions, 17536 events. 12409/17536 cut-off events. For 604913/604993 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 99955 event pairs, 3072 based on Foata normal form. 65/17592 useless extension candidates. Maximal degree in co-relation 129068. Up to 13604 conditions per place. [2024-06-21 17:44:42,408 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 259 selfloop transitions, 202 changer transitions 0/467 dead transitions. [2024-06-21 17:44:42,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 467 transitions, 6913 flow [2024-06-21 17:44:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:44:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:44:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-21 17:44:42,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49423076923076925 [2024-06-21 17:44:42,413 INFO L175 Difference]: Start difference. First operand has 192 places, 364 transitions, 4866 flow. Second operand 10 states and 257 transitions. [2024-06-21 17:44:42,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 467 transitions, 6913 flow [2024-06-21 17:44:43,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 467 transitions, 6714 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-21 17:44:43,742 INFO L231 Difference]: Finished difference. Result has 199 places, 386 transitions, 5541 flow [2024-06-21 17:44:43,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4667, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5541, PETRI_PLACES=199, PETRI_TRANSITIONS=386} [2024-06-21 17:44:43,743 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 144 predicate places. [2024-06-21 17:44:43,743 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 386 transitions, 5541 flow [2024-06-21 17:44:43,743 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) [2024-06-21 17:44:43,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:43,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:43,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:44:43,744 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:44:43,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:43,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2075409595, now seen corresponding path program 6 times [2024-06-21 17:44:43,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:43,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935481085] [2024-06-21 17:44:43,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:43,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:47,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:47,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935481085] [2024-06-21 17:44:47,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935481085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:47,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:47,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:44:47,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718904010] [2024-06-21 17:44:47,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:47,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:44:47,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:47,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:44:47,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:44:47,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:44:47,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 386 transitions, 5541 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) [2024-06-21 17:44:47,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:47,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:44:47,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:44:51,699 INFO L124 PetriNetUnfolderBase]: 12373/17441 cut-off events. [2024-06-21 17:44:51,699 INFO L125 PetriNetUnfolderBase]: For 667459/667472 co-relation queries the response was YES. [2024-06-21 17:44:51,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136064 conditions, 17441 events. 12373/17441 cut-off events. For 667459/667472 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 99665 event pairs, 3494 based on Foata normal form. 28/17466 useless extension candidates. Maximal degree in co-relation 135970. Up to 14943 conditions per place. [2024-06-21 17:44:51,924 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 327 selfloop transitions, 147 changer transitions 0/480 dead transitions. [2024-06-21 17:44:51,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 480 transitions, 7161 flow [2024-06-21 17:44:51,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:44:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:44:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 277 transitions. [2024-06-21 17:44:51,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48426573426573427 [2024-06-21 17:44:51,926 INFO L175 Difference]: Start difference. First operand has 199 places, 386 transitions, 5541 flow. Second operand 11 states and 277 transitions. [2024-06-21 17:44:51,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 480 transitions, 7161 flow [2024-06-21 17:44:53,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 480 transitions, 6884 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-21 17:44:53,834 INFO L231 Difference]: Finished difference. Result has 207 places, 394 transitions, 5878 flow [2024-06-21 17:44:53,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5878, PETRI_PLACES=207, PETRI_TRANSITIONS=394} [2024-06-21 17:44:53,835 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 152 predicate places. [2024-06-21 17:44:53,835 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 394 transitions, 5878 flow [2024-06-21 17:44:53,835 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) [2024-06-21 17:44:53,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:44:53,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:44:53,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:44:53,836 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:44:53,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:44:53,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1547169437, now seen corresponding path program 1 times [2024-06-21 17:44:53,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:44:53,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707990487] [2024-06-21 17:44:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:44:53,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:44:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:44:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:44:55,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:44:55,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707990487] [2024-06-21 17:44:55,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707990487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:44:55,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:44:55,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:44:55,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446657732] [2024-06-21 17:44:55,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:44:55,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:44:55,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:44:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:44:55,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:44:55,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-21 17:44:55,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 394 transitions, 5878 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) [2024-06-21 17:44:55,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:44:55,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-21 17:44:55,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand