./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe028_power.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe028_power.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/safe028_power.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe028_power.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 22:08:04,392 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 22:08:04,434 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 22:08:04,441 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 22:08:04,441 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 22:08:04,463 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 22:08:04,464 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 22:08:04,464 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 22:08:04,465 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 22:08:04,465 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 22:08:04,465 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 22:08:04,466 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 22:08:04,466 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 22:08:04,467 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 22:08:04,467 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 22:08:04,467 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 22:08:04,468 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 22:08:04,468 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 22:08:04,468 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 22:08:04,468 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 22:08:04,469 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 22:08:04,469 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 22:08:04,469 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 22:08:04,470 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 22:08:04,470 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 22:08:04,470 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 22:08:04,470 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 22:08:04,470 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 22:08:04,471 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 22:08:04,471 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 22:08:04,471 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 22:08:04,471 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 22:08:04,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:08:04,472 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 22:08:04,472 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 22:08:04,472 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 22:08:04,472 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 22:08:04,473 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 22:08:04,473 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 22:08:04,473 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 22:08:04,473 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 22:08:04,474 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 22:08:04,474 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 22:08:04,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 22:08:04,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 22:08:04,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 22:08:04,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 22:08:04,681 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 22:08:04,681 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 22:08:04,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe028_power.yml/witness.yml [2024-06-21 22:08:04,932 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 22:08:04,932 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 22:08:04,932 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_power.i [2024-06-21 22:08:05,993 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 22:08:06,205 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 22:08:06,206 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_power.i [2024-06-21 22:08:06,220 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c75d2cb1/ba563adca2954bbdac2fd904e61ed571/FLAG9044acb23 [2024-06-21 22:08:06,234 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c75d2cb1/ba563adca2954bbdac2fd904e61ed571 [2024-06-21 22:08:06,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 22:08:06,236 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 22:08:06,238 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 22:08:06,238 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 22:08:06,242 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 22:08:06,243 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:08:04" (1/2) ... [2024-06-21 22:08:06,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31cc2df and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:06, skipping insertion in model container [2024-06-21 22:08:06,244 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:08:04" (1/2) ... [2024-06-21 22:08:06,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@11a4c061 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 10:08:06, skipping insertion in model container [2024-06-21 22:08:06,245 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:08:06" (2/2) ... [2024-06-21 22:08:06,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31cc2df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06, skipping insertion in model container [2024-06-21 22:08:06,246 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 10:08:06" (2/2) ... [2024-06-21 22:08:06,246 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 22:08:06,355 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 22:08:06,356 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] ((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-21 22:08:06,356 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-21 22:08:06,356 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((((((((((((((! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p2_EAX$flush_delayed == (_Bool)0) && __unbuffered_p2_EAX$mem_tmp == 0) && __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p2_EAX$w_buff0 == 0) && __unbuffered_p2_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p2_EAX$w_buff1 == 0) && __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1)))) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) [2024-06-21 22:08:06,357 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 22:08:06,357 INFO L106 edCorrectnessWitness]: ghost_update [L862-L862] multithreaded = 1; [2024-06-21 22:08:06,392 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 22:08:06,692 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:08:06,700 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 22:08:06,863 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 22:08:06,898 INFO L206 MainTranslator]: Completed translation [2024-06-21 22:08:06,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06 WrapperNode [2024-06-21 22:08:06,898 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 22:08:06,899 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 22:08:06,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 22:08:06,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 22:08:06,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06" (1/1) ... [2024-06-21 22:08:06,918 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06" (1/1) ... [2024-06-21 22:08:06,951 INFO L138 Inliner]: procedures = 175, calls = 90, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 251 [2024-06-21 22:08:06,951 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 22:08:06,952 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 22:08:06,952 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 22:08:06,952 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 22:08:06,961 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06" (1/1) ... [2024-06-21 22:08:06,963 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06" (1/1) ... [2024-06-21 22:08:06,967 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06" (1/1) ... [2024-06-21 22:08:06,985 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 7 writes are split as follows [0, 7]. [2024-06-21 22:08:06,986 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06" (1/1) ... [2024-06-21 22:08:06,986 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06" (1/1) ... [2024-06-21 22:08:06,996 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06" (1/1) ... [2024-06-21 22:08:06,997 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06" (1/1) ... [2024-06-21 22:08:06,999 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06" (1/1) ... [2024-06-21 22:08:07,001 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06" (1/1) ... [2024-06-21 22:08:07,005 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 22:08:07,006 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 22:08:07,006 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 22:08:07,006 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 22:08:07,006 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06" (1/1) ... [2024-06-21 22:08:07,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 22:08:07,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 22:08:07,041 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 22:08:07,061 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 22:08:07,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-21 22:08:07,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-21 22:08:07,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-21 22:08:07,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-21 22:08:07,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 22:08:07,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 22:08:07,075 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 22:08:07,075 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 22:08:07,075 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 22:08:07,075 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 22:08:07,075 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 22:08:07,076 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 22:08:07,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 22:08:07,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-21 22:08:07,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 22:08:07,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 22:08:07,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 22:08:07,079 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 22:08:07,241 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 22:08:07,243 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 22:08:07,708 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 22:08:07,708 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 22:08:07,998 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 22:08:07,998 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 22:08:07,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:08:07 BoogieIcfgContainer [2024-06-21 22:08:07,999 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 22:08:08,001 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 22:08:08,001 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 22:08:08,003 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 22:08:08,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 10:08:04" (1/4) ... [2024-06-21 22:08:08,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad1b1cf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 10:08:08, skipping insertion in model container [2024-06-21 22:08:08,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 10:08:06" (2/4) ... [2024-06-21 22:08:08,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad1b1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:08:08, skipping insertion in model container [2024-06-21 22:08:08,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 10:08:06" (3/4) ... [2024-06-21 22:08:08,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ad1b1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 10:08:08, skipping insertion in model container [2024-06-21 22:08:08,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 10:08:07" (4/4) ... [2024-06-21 22:08:08,006 INFO L112 eAbstractionObserver]: Analyzing ICFG safe028_power.i [2024-06-21 22:08:08,019 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 22:08:08,020 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 22:08:08,020 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 22:08:08,078 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 22:08:08,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 22:08:08,134 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 22:08:08,135 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:08:08,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 22:08:08,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 22:08:08,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 22:08:08,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 22:08:08,156 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;@635a554, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 22:08:08,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 22:08:08,161 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 22:08:08,161 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 22:08:08,161 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 22:08:08,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:08,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 22:08:08,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:08,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash 886037149, now seen corresponding path program 1 times [2024-06-21 22:08:08,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:08,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385421646] [2024-06-21 22:08:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:08,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:09,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:09,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385421646] [2024-06-21 22:08:09,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385421646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:09,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:09,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 22:08:09,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254536205] [2024-06-21 22:08:09,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:09,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 22:08:09,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:09,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 22:08:09,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 22:08:09,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 22:08:09,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 22:08:09,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:09,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 22:08:09,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:10,195 INFO L124 PetriNetUnfolderBase]: 990/1587 cut-off events. [2024-06-21 22:08:10,195 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 22:08:10,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3167 conditions, 1587 events. 990/1587 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7691 event pairs, 650 based on Foata normal form. 1/1559 useless extension candidates. Maximal degree in co-relation 3155. Up to 1503 conditions per place. [2024-06-21 22:08:10,208 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 22:08:10,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 45 transitions, 181 flow [2024-06-21 22:08:10,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 22:08:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 22:08:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-21 22:08:10,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-21 22:08:10,219 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-21 22:08:10,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 45 transitions, 181 flow [2024-06-21 22:08:10,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:10,225 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 22:08:10,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 22:08:10,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 22:08:10,229 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 22:08:10,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states 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 22:08:10,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:10,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:10,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 22:08:10,230 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:10,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1078368882, now seen corresponding path program 1 times [2024-06-21 22:08:10,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:10,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563409519] [2024-06-21 22:08:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:10,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:11,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:11,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563409519] [2024-06-21 22:08:11,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563409519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:11,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:11,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 22:08:11,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846029891] [2024-06-21 22:08:11,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:11,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 22:08:11,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:11,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 22:08:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 22:08:11,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:08:11,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 22:08:11,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:11,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:08:11,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:11,765 INFO L124 PetriNetUnfolderBase]: 1148/1764 cut-off events. [2024-06-21 22:08:11,766 INFO L125 PetriNetUnfolderBase]: For 341/341 co-relation queries the response was YES. [2024-06-21 22:08:11,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1764 events. 1148/1764 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8249 event pairs, 521 based on Foata normal form. 6/1770 useless extension candidates. Maximal degree in co-relation 4046. Up to 1692 conditions per place. [2024-06-21 22:08:11,773 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 45 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-21 22:08:11,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 262 flow [2024-06-21 22:08:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 22:08:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 22:08:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-06-21 22:08:11,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-21 22:08:11,775 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 91 transitions. [2024-06-21 22:08:11,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 262 flow [2024-06-21 22:08:11,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 22:08:11,776 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 22:08:11,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 22:08:11,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 22:08:11,777 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 22:08:11,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states 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 22:08:11,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:11,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:11,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 22:08:11,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:11,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:11,779 INFO L85 PathProgramCache]: Analyzing trace with hash 815707376, now seen corresponding path program 1 times [2024-06-21 22:08:11,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:11,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255460264] [2024-06-21 22:08:11,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:11,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:13,703 INFO 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 22:08:13,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:13,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255460264] [2024-06-21 22:08:13,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255460264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:13,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:13,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:08:13,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473262597] [2024-06-21 22:08:13,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:13,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:08:13,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:13,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:08:13,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:08:13,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:08:13,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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 22:08:13,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:13,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:08:13,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:14,363 INFO L124 PetriNetUnfolderBase]: 1139/1749 cut-off events. [2024-06-21 22:08:14,364 INFO L125 PetriNetUnfolderBase]: For 964/964 co-relation queries the response was YES. [2024-06-21 22:08:14,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4493 conditions, 1749 events. 1139/1749 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8166 event pairs, 375 based on Foata normal form. 6/1755 useless extension candidates. Maximal degree in co-relation 4479. Up to 1639 conditions per place. [2024-06-21 22:08:14,372 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-06-21 22:08:14,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 76 transitions, 380 flow [2024-06-21 22:08:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:08:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:08:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 22:08:14,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-21 22:08:14,374 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 127 transitions. [2024-06-21 22:08:14,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 76 transitions, 380 flow [2024-06-21 22:08:14,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 360 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 22:08:14,377 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 22:08:14,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 22:08:14,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 22:08:14,377 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 22:08:14,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 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 22:08:14,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:14,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:14,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 22:08:14,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:14,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:14,379 INFO L85 PathProgramCache]: Analyzing trace with hash -61952462, now seen corresponding path program 1 times [2024-06-21 22:08:14,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:14,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098339914] [2024-06-21 22:08:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:14,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:15,627 INFO 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 22:08:15,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:15,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098339914] [2024-06-21 22:08:15,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098339914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:15,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:15,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:08:15,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008587307] [2024-06-21 22:08:15,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:15,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:08:15,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:15,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:08:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:08:15,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:08:15,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 22:08:15,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:15,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:08:15,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:16,207 INFO L124 PetriNetUnfolderBase]: 964/1547 cut-off events. [2024-06-21 22:08:16,208 INFO L125 PetriNetUnfolderBase]: For 1573/1573 co-relation queries the response was YES. [2024-06-21 22:08:16,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4327 conditions, 1547 events. 964/1547 cut-off events. For 1573/1573 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7416 event pairs, 382 based on Foata normal form. 2/1549 useless extension candidates. Maximal degree in co-relation 4310. Up to 1452 conditions per place. [2024-06-21 22:08:16,215 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-21 22:08:16,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 337 flow [2024-06-21 22:08:16,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:08:16,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:08:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-21 22:08:16,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-21 22:08:16,218 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 93 transitions. [2024-06-21 22:08:16,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 337 flow [2024-06-21 22:08:16,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 310 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:16,224 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-21 22:08:16,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 22:08:16,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 22:08:16,225 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-21 22:08:16,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 22:08:16,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:16,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:16,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 22:08:16,226 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:16,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:16,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1920524328, now seen corresponding path program 1 times [2024-06-21 22:08:16,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:16,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447986630] [2024-06-21 22:08:16,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:16,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:18,246 INFO 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 22:08:18,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:18,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447986630] [2024-06-21 22:08:18,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447986630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:18,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:18,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:08:18,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471936591] [2024-06-21 22:08:18,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:18,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:08:18,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:18,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:08:18,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:08:18,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:08:18,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:18,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:18,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:08:18,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:18,844 INFO L124 PetriNetUnfolderBase]: 959/1558 cut-off events. [2024-06-21 22:08:18,844 INFO L125 PetriNetUnfolderBase]: For 2224/2224 co-relation queries the response was YES. [2024-06-21 22:08:18,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4652 conditions, 1558 events. 959/1558 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7553 event pairs, 367 based on Foata normal form. 2/1560 useless extension candidates. Maximal degree in co-relation 4633. Up to 1434 conditions per place. [2024-06-21 22:08:18,852 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-21 22:08:18,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 68 transitions, 386 flow [2024-06-21 22:08:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:08:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:08:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 22:08:18,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 22:08:18,854 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 110 transitions. [2024-06-21 22:08:18,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 68 transitions, 386 flow [2024-06-21 22:08:18,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 366 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:18,856 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 232 flow [2024-06-21 22:08:18,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-06-21 22:08:18,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-21 22:08:18,857 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 232 flow [2024-06-21 22:08:18,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:18,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:18,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:18,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 22:08:18,858 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:18,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:18,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1828536349, now seen corresponding path program 1 times [2024-06-21 22:08:18,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:18,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212918958] [2024-06-21 22:08:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:18,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:20,249 INFO 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 22:08:20,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:20,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212918958] [2024-06-21 22:08:20,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212918958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:20,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:20,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:08:20,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514813098] [2024-06-21 22:08:20,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:20,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:08:20,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:20,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:08:20,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:08:20,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:20,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:20,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:20,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:20,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:20,994 INFO L124 PetriNetUnfolderBase]: 1170/1803 cut-off events. [2024-06-21 22:08:20,994 INFO L125 PetriNetUnfolderBase]: For 3780/3780 co-relation queries the response was YES. [2024-06-21 22:08:20,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5943 conditions, 1803 events. 1170/1803 cut-off events. For 3780/3780 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8413 event pairs, 447 based on Foata normal form. 4/1806 useless extension candidates. Maximal degree in co-relation 5923. Up to 1714 conditions per place. [2024-06-21 22:08:21,002 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 58 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-21 22:08:21,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 79 transitions, 485 flow [2024-06-21 22:08:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 22:08:21,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:08:21,004 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 232 flow. Second operand 7 states and 119 transitions. [2024-06-21 22:08:21,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 79 transitions, 485 flow [2024-06-21 22:08:21,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 453 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 22:08:21,007 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 311 flow [2024-06-21 22:08:21,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-06-21 22:08:21,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-21 22:08:21,008 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 311 flow [2024-06-21 22:08:21,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:21,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:21,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:21,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 22:08:21,009 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:21,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:21,009 INFO L85 PathProgramCache]: Analyzing trace with hash -346224877, now seen corresponding path program 2 times [2024-06-21 22:08:21,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:21,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503521392] [2024-06-21 22:08:21,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:21,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:22,178 INFO 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 22:08:22,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:22,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503521392] [2024-06-21 22:08:22,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503521392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:22,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:22,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:08:22,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21811668] [2024-06-21 22:08:22,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:22,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:08:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:08:22,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:08:22,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:22,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 311 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:22,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:22,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:22,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:22,855 INFO L124 PetriNetUnfolderBase]: 1223/1898 cut-off events. [2024-06-21 22:08:22,855 INFO L125 PetriNetUnfolderBase]: For 5364/5364 co-relation queries the response was YES. [2024-06-21 22:08:22,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6798 conditions, 1898 events. 1223/1898 cut-off events. For 5364/5364 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9034 event pairs, 428 based on Foata normal form. 4/1902 useless extension candidates. Maximal degree in co-relation 6775. Up to 1774 conditions per place. [2024-06-21 22:08:22,867 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 68 selfloop transitions, 24 changer transitions 0/97 dead transitions. [2024-06-21 22:08:22,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 97 transitions, 652 flow [2024-06-21 22:08:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 22:08:22,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 22:08:22,871 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 311 flow. Second operand 7 states and 128 transitions. [2024-06-21 22:08:22,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 97 transitions, 652 flow [2024-06-21 22:08:22,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 97 transitions, 605 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 22:08:22,881 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 433 flow [2024-06-21 22:08:22,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=433, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-06-21 22:08:22,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 22:08:22,883 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 433 flow [2024-06-21 22:08:22,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:22,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:22,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:22,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 22:08:22,884 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:22,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:22,885 INFO L85 PathProgramCache]: Analyzing trace with hash 593281073, now seen corresponding path program 3 times [2024-06-21 22:08:22,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:22,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021048191] [2024-06-21 22:08:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:22,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:24,292 INFO 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 22:08:24,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:24,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021048191] [2024-06-21 22:08:24,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021048191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:24,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:24,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:08:24,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266603194] [2024-06-21 22:08:24,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:24,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:08:24,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:08:24,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:08:24,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:24,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 433 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:24,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:24,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:24,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:24,898 INFO L124 PetriNetUnfolderBase]: 1231/1912 cut-off events. [2024-06-21 22:08:24,899 INFO L125 PetriNetUnfolderBase]: For 7340/7340 co-relation queries the response was YES. [2024-06-21 22:08:24,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7342 conditions, 1912 events. 1231/1912 cut-off events. For 7340/7340 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9115 event pairs, 435 based on Foata normal form. 4/1915 useless extension candidates. Maximal degree in co-relation 7316. Up to 1731 conditions per place. [2024-06-21 22:08:24,916 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 29 changer transitions 0/92 dead transitions. [2024-06-21 22:08:24,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 697 flow [2024-06-21 22:08:24,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:08:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:08:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 22:08:24,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-21 22:08:24,918 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 433 flow. Second operand 6 states and 109 transitions. [2024-06-21 22:08:24,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 697 flow [2024-06-21 22:08:24,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 92 transitions, 647 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 22:08:24,922 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 487 flow [2024-06-21 22:08:24,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=487, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2024-06-21 22:08:24,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-21 22:08:24,936 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 487 flow [2024-06-21 22:08:24,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:24,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:24,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:24,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 22:08:24,937 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:24,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:24,937 INFO L85 PathProgramCache]: Analyzing trace with hash 593290001, now seen corresponding path program 1 times [2024-06-21 22:08:24,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:24,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878678780] [2024-06-21 22:08:24,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:24,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:26,962 INFO 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 22:08:26,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:26,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878678780] [2024-06-21 22:08:26,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878678780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:26,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:26,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:26,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026278608] [2024-06-21 22:08:26,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:26,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:26,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:26,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:26,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:26,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:08:26,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 487 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:26,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:26,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:08:26,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:27,575 INFO L124 PetriNetUnfolderBase]: 1053/1680 cut-off events. [2024-06-21 22:08:27,576 INFO L125 PetriNetUnfolderBase]: For 8289/8289 co-relation queries the response was YES. [2024-06-21 22:08:27,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6812 conditions, 1680 events. 1053/1680 cut-off events. For 8289/8289 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 8280 event pairs, 528 based on Foata normal form. 4/1674 useless extension candidates. Maximal degree in co-relation 6785. Up to 1550 conditions per place. [2024-06-21 22:08:27,586 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 78 selfloop transitions, 14 changer transitions 0/98 dead transitions. [2024-06-21 22:08:27,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 763 flow [2024-06-21 22:08:27,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 22:08:27,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 22:08:27,587 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 487 flow. Second operand 7 states and 127 transitions. [2024-06-21 22:08:27,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 763 flow [2024-06-21 22:08:27,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 98 transitions, 683 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 22:08:27,593 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 472 flow [2024-06-21 22:08:27,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=472, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-21 22:08:27,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-21 22:08:27,594 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 472 flow [2024-06-21 22:08:27,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:27,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:27,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:27,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 22:08:27,595 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:27,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:27,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1076509839, now seen corresponding path program 1 times [2024-06-21 22:08:27,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:27,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997905923] [2024-06-21 22:08:27,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:27,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:29,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:29,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997905923] [2024-06-21 22:08:29,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997905923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:29,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:29,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:29,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377265290] [2024-06-21 22:08:29,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:29,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:29,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:29,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:29,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:29,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:29,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 472 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:29,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:29,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:29,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:29,890 INFO L124 PetriNetUnfolderBase]: 1249/1942 cut-off events. [2024-06-21 22:08:29,891 INFO L125 PetriNetUnfolderBase]: For 10476/10476 co-relation queries the response was YES. [2024-06-21 22:08:29,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8011 conditions, 1942 events. 1249/1942 cut-off events. For 10476/10476 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9266 event pairs, 406 based on Foata normal form. 4/1946 useless extension candidates. Maximal degree in co-relation 7983. Up to 1782 conditions per place. [2024-06-21 22:08:29,901 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 78 selfloop transitions, 28 changer transitions 0/111 dead transitions. [2024-06-21 22:08:29,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 814 flow [2024-06-21 22:08:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:08:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:08:29,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:08:29,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 22:08:29,903 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 472 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:08:29,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 814 flow [2024-06-21 22:08:29,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 111 transitions, 767 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 22:08:29,909 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 537 flow [2024-06-21 22:08:29,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=537, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-06-21 22:08:29,909 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-21 22:08:29,909 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 537 flow [2024-06-21 22:08:29,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:29,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:29,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:29,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 22:08:29,910 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:29,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:29,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1865256455, now seen corresponding path program 2 times [2024-06-21 22:08:29,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:29,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706699465] [2024-06-21 22:08:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:29,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:31,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:31,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706699465] [2024-06-21 22:08:31,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706699465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:31,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:31,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:31,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635486114] [2024-06-21 22:08:31,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:31,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:31,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:31,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:31,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:31,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:31,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 537 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:31,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:31,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:31,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:32,480 INFO L124 PetriNetUnfolderBase]: 1275/1986 cut-off events. [2024-06-21 22:08:32,480 INFO L125 PetriNetUnfolderBase]: For 12969/12969 co-relation queries the response was YES. [2024-06-21 22:08:32,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8775 conditions, 1986 events. 1275/1986 cut-off events. For 12969/12969 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9480 event pairs, 406 based on Foata normal form. 4/1990 useless extension candidates. Maximal degree in co-relation 8746. Up to 1776 conditions per place. [2024-06-21 22:08:32,491 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 71 selfloop transitions, 33 changer transitions 0/109 dead transitions. [2024-06-21 22:08:32,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 109 transitions, 869 flow [2024-06-21 22:08:32,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 22:08:32,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 22:08:32,493 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 537 flow. Second operand 7 states and 127 transitions. [2024-06-21 22:08:32,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 109 transitions, 869 flow [2024-06-21 22:08:32,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 789 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 22:08:32,501 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 592 flow [2024-06-21 22:08:32,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=592, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-21 22:08:32,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-21 22:08:32,501 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 592 flow [2024-06-21 22:08:32,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:32,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:32,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:32,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 22:08:32,502 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:32,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:32,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1212112983, now seen corresponding path program 3 times [2024-06-21 22:08:32,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:32,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635705387] [2024-06-21 22:08:32,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:32,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:34,441 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 22:08:34,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:34,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635705387] [2024-06-21 22:08:34,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635705387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:34,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:34,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:34,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629830551] [2024-06-21 22:08:34,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:34,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:34,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:34,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:34,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:34,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:34,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 592 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:34,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:34,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:34,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:35,105 INFO L124 PetriNetUnfolderBase]: 1288/2000 cut-off events. [2024-06-21 22:08:35,105 INFO L125 PetriNetUnfolderBase]: For 15768/15768 co-relation queries the response was YES. [2024-06-21 22:08:35,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9451 conditions, 2000 events. 1288/2000 cut-off events. For 15768/15768 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9540 event pairs, 413 based on Foata normal form. 2/2001 useless extension candidates. Maximal degree in co-relation 9421. Up to 1793 conditions per place. [2024-06-21 22:08:35,115 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 81 selfloop transitions, 40 changer transitions 0/126 dead transitions. [2024-06-21 22:08:35,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 126 transitions, 1145 flow [2024-06-21 22:08:35,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 22:08:35,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:08:35,117 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 592 flow. Second operand 7 states and 126 transitions. [2024-06-21 22:08:35,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 126 transitions, 1145 flow [2024-06-21 22:08:35,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 126 transitions, 997 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 22:08:35,125 INFO L231 Difference]: Finished difference. Result has 79 places, 101 transitions, 797 flow [2024-06-21 22:08:35,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=797, PETRI_PLACES=79, PETRI_TRANSITIONS=101} [2024-06-21 22:08:35,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-21 22:08:35,126 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 101 transitions, 797 flow [2024-06-21 22:08:35,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:35,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:35,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:35,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 22:08:35,127 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:35,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:35,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1211846073, now seen corresponding path program 4 times [2024-06-21 22:08:35,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:35,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578539385] [2024-06-21 22:08:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:35,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:36,932 INFO 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 22:08:36,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:36,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578539385] [2024-06-21 22:08:36,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578539385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:36,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:36,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:36,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643024840] [2024-06-21 22:08:36,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:36,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:36,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:36,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:36,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:36,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:36,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 101 transitions, 797 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:36,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:36,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:36,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:37,672 INFO L124 PetriNetUnfolderBase]: 1296/2012 cut-off events. [2024-06-21 22:08:37,672 INFO L125 PetriNetUnfolderBase]: For 15375/15375 co-relation queries the response was YES. [2024-06-21 22:08:37,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9483 conditions, 2012 events. 1296/2012 cut-off events. For 15375/15375 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9548 event pairs, 413 based on Foata normal form. 4/2015 useless extension candidates. Maximal degree in co-relation 9450. Up to 1804 conditions per place. [2024-06-21 22:08:37,699 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 80 selfloop transitions, 43 changer transitions 0/128 dead transitions. [2024-06-21 22:08:37,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 128 transitions, 1160 flow [2024-06-21 22:08:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 22:08:37,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:08:37,701 INFO L175 Difference]: Start difference. First operand has 79 places, 101 transitions, 797 flow. Second operand 7 states and 126 transitions. [2024-06-21 22:08:37,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 128 transitions, 1160 flow [2024-06-21 22:08:37,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 128 transitions, 1077 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:37,718 INFO L231 Difference]: Finished difference. Result has 83 places, 104 transitions, 866 flow [2024-06-21 22:08:37,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=866, PETRI_PLACES=83, PETRI_TRANSITIONS=104} [2024-06-21 22:08:37,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-21 22:08:37,719 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 104 transitions, 866 flow [2024-06-21 22:08:37,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:37,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:37,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:37,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 22:08:37,720 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:37,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:37,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2031286916, now seen corresponding path program 1 times [2024-06-21 22:08:37,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:37,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807611196] [2024-06-21 22:08:37,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:37,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:39,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:39,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807611196] [2024-06-21 22:08:39,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807611196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:39,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:39,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:39,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057374865] [2024-06-21 22:08:39,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:39,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:39,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:39,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:39,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:39,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 104 transitions, 866 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:39,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:39,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:39,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:40,306 INFO L124 PetriNetUnfolderBase]: 1339/2092 cut-off events. [2024-06-21 22:08:40,307 INFO L125 PetriNetUnfolderBase]: For 17733/17733 co-relation queries the response was YES. [2024-06-21 22:08:40,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10134 conditions, 2092 events. 1339/2092 cut-off events. For 17733/17733 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10153 event pairs, 388 based on Foata normal form. 2/2094 useless extension candidates. Maximal degree in co-relation 10100. Up to 1926 conditions per place. [2024-06-21 22:08:40,319 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 114 selfloop transitions, 30 changer transitions 0/149 dead transitions. [2024-06-21 22:08:40,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 149 transitions, 1334 flow [2024-06-21 22:08:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:08:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:08:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:08:40,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:08:40,321 INFO L175 Difference]: Start difference. First operand has 83 places, 104 transitions, 866 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:08:40,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 149 transitions, 1334 flow [2024-06-21 22:08:40,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 149 transitions, 1212 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 22:08:40,333 INFO L231 Difference]: Finished difference. Result has 87 places, 115 transitions, 919 flow [2024-06-21 22:08:40,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=919, PETRI_PLACES=87, PETRI_TRANSITIONS=115} [2024-06-21 22:08:40,334 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 22:08:40,334 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 115 transitions, 919 flow [2024-06-21 22:08:40,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:40,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:40,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:40,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 22:08:40,335 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:40,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1551041840, now seen corresponding path program 2 times [2024-06-21 22:08:40,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:40,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528497019] [2024-06-21 22:08:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:40,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:41,838 INFO 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 22:08:41,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:41,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528497019] [2024-06-21 22:08:41,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528497019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:41,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:41,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:41,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914354403] [2024-06-21 22:08:41,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:41,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:41,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:41,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:41,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:41,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:41,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 115 transitions, 919 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:41,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:41,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:41,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:42,679 INFO L124 PetriNetUnfolderBase]: 1383/2157 cut-off events. [2024-06-21 22:08:42,680 INFO L125 PetriNetUnfolderBase]: For 21272/21272 co-relation queries the response was YES. [2024-06-21 22:08:42,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10932 conditions, 2157 events. 1383/2157 cut-off events. For 21272/21272 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 10445 event pairs, 388 based on Foata normal form. 4/2161 useless extension candidates. Maximal degree in co-relation 10896. Up to 1965 conditions per place. [2024-06-21 22:08:42,692 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 120 selfloop transitions, 36 changer transitions 0/161 dead transitions. [2024-06-21 22:08:42,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 161 transitions, 1487 flow [2024-06-21 22:08:42,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:08:42,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:08:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 22:08:42,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 22:08:42,705 INFO L175 Difference]: Start difference. First operand has 87 places, 115 transitions, 919 flow. Second operand 8 states and 148 transitions. [2024-06-21 22:08:42,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 161 transitions, 1487 flow [2024-06-21 22:08:42,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 161 transitions, 1367 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-21 22:08:42,719 INFO L231 Difference]: Finished difference. Result has 93 places, 124 transitions, 1043 flow [2024-06-21 22:08:42,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1043, PETRI_PLACES=93, PETRI_TRANSITIONS=124} [2024-06-21 22:08:42,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 22:08:42,719 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 124 transitions, 1043 flow [2024-06-21 22:08:42,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:42,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:42,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:42,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 22:08:42,720 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:42,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash -996868634, now seen corresponding path program 1 times [2024-06-21 22:08:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:42,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427657866] [2024-06-21 22:08:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:42,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:44,640 INFO 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 22:08:44,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:44,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427657866] [2024-06-21 22:08:44,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427657866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:44,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:44,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:08:44,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452837496] [2024-06-21 22:08:44,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:44,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:08:44,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:44,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:08:44,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:08:44,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:44,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 124 transitions, 1043 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:08:44,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:44,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:44,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:45,639 INFO L124 PetriNetUnfolderBase]: 1491/2338 cut-off events. [2024-06-21 22:08:45,639 INFO L125 PetriNetUnfolderBase]: For 30167/30167 co-relation queries the response was YES. [2024-06-21 22:08:45,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12345 conditions, 2338 events. 1491/2338 cut-off events. For 30167/30167 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11700 event pairs, 408 based on Foata normal form. 24/2362 useless extension candidates. Maximal degree in co-relation 12307. Up to 1988 conditions per place. [2024-06-21 22:08:45,653 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 128 selfloop transitions, 36 changer transitions 0/169 dead transitions. [2024-06-21 22:08:45,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 169 transitions, 1580 flow [2024-06-21 22:08:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:45,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:08:45,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 22:08:45,655 INFO L175 Difference]: Start difference. First operand has 93 places, 124 transitions, 1043 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:08:45,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 169 transitions, 1580 flow [2024-06-21 22:08:45,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 169 transitions, 1485 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 22:08:45,672 INFO L231 Difference]: Finished difference. Result has 97 places, 126 transitions, 1071 flow [2024-06-21 22:08:45,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1071, PETRI_PLACES=97, PETRI_TRANSITIONS=126} [2024-06-21 22:08:45,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-21 22:08:45,675 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 126 transitions, 1071 flow [2024-06-21 22:08:45,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:08:45,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:45,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:45,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 22:08:45,677 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:45,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:45,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1988192708, now seen corresponding path program 3 times [2024-06-21 22:08:45,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:45,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836912049] [2024-06-21 22:08:45,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:45,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:47,328 INFO 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 22:08:47,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:47,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836912049] [2024-06-21 22:08:47,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836912049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:47,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:47,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:08:47,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371091177] [2024-06-21 22:08:47,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:47,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:08:47,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:47,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:08:47,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:08:47,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:47,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 126 transitions, 1071 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:47,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:47,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:47,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:48,355 INFO L124 PetriNetUnfolderBase]: 1486/2331 cut-off events. [2024-06-21 22:08:48,355 INFO L125 PetriNetUnfolderBase]: For 30514/30514 co-relation queries the response was YES. [2024-06-21 22:08:48,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12514 conditions, 2331 events. 1486/2331 cut-off events. For 30514/30514 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11659 event pairs, 398 based on Foata normal form. 2/2333 useless extension candidates. Maximal degree in co-relation 12475. Up to 2131 conditions per place. [2024-06-21 22:08:48,368 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 38 changer transitions 0/160 dead transitions. [2024-06-21 22:08:48,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 160 transitions, 1565 flow [2024-06-21 22:08:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:08:48,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:08:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 22:08:48,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 22:08:48,370 INFO L175 Difference]: Start difference. First operand has 97 places, 126 transitions, 1071 flow. Second operand 7 states and 129 transitions. [2024-06-21 22:08:48,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 160 transitions, 1565 flow [2024-06-21 22:08:48,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 160 transitions, 1494 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 22:08:48,389 INFO L231 Difference]: Finished difference. Result has 97 places, 131 transitions, 1192 flow [2024-06-21 22:08:48,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1192, PETRI_PLACES=97, PETRI_TRANSITIONS=131} [2024-06-21 22:08:48,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-21 22:08:48,389 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 131 transitions, 1192 flow [2024-06-21 22:08:48,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:08:48,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:48,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:48,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 22:08:48,390 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:48,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:48,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1988377282, now seen corresponding path program 2 times [2024-06-21 22:08:48,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:48,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38389339] [2024-06-21 22:08:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:48,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:48,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:50,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:50,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38389339] [2024-06-21 22:08:50,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38389339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:50,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:50,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:08:50,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335252950] [2024-06-21 22:08:50,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:50,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:08:50,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:08:50,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:08:50,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:50,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 131 transitions, 1192 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:08:50,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:50,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:50,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:51,393 INFO L124 PetriNetUnfolderBase]: 1594/2511 cut-off events. [2024-06-21 22:08:51,394 INFO L125 PetriNetUnfolderBase]: For 40011/40011 co-relation queries the response was YES. [2024-06-21 22:08:51,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14023 conditions, 2511 events. 1594/2511 cut-off events. For 40011/40011 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12810 event pairs, 420 based on Foata normal form. 24/2535 useless extension candidates. Maximal degree in co-relation 13983. Up to 1949 conditions per place. [2024-06-21 22:08:51,407 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 47 changer transitions 0/170 dead transitions. [2024-06-21 22:08:51,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 170 transitions, 1725 flow [2024-06-21 22:08:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:08:51,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:08:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:08:51,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:08:51,409 INFO L175 Difference]: Start difference. First operand has 97 places, 131 transitions, 1192 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:08:51,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 170 transitions, 1725 flow [2024-06-21 22:08:51,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 170 transitions, 1603 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 22:08:51,431 INFO L231 Difference]: Finished difference. Result has 100 places, 133 transitions, 1227 flow [2024-06-21 22:08:51,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1227, PETRI_PLACES=100, PETRI_TRANSITIONS=133} [2024-06-21 22:08:51,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-21 22:08:51,432 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 133 transitions, 1227 flow [2024-06-21 22:08:51,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:08:51,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:51,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:51,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 22:08:51,433 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:51,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1087475376, now seen corresponding path program 3 times [2024-06-21 22:08:51,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:51,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118270235] [2024-06-21 22:08:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:51,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:53,377 INFO 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 22:08:53,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:53,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118270235] [2024-06-21 22:08:53,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118270235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:53,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:53,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:08:53,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632236154] [2024-06-21 22:08:53,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:53,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:08:53,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:53,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:08:53,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:08:53,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:53,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 133 transitions, 1227 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:08:53,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:53,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:53,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:54,304 INFO L124 PetriNetUnfolderBase]: 1702/2688 cut-off events. [2024-06-21 22:08:54,305 INFO L125 PetriNetUnfolderBase]: For 47465/47465 co-relation queries the response was YES. [2024-06-21 22:08:54,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15452 conditions, 2688 events. 1702/2688 cut-off events. For 47465/47465 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14050 event pairs, 441 based on Foata normal form. 24/2711 useless extension candidates. Maximal degree in co-relation 15411. Up to 2298 conditions per place. [2024-06-21 22:08:54,322 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 119 selfloop transitions, 45 changer transitions 0/169 dead transitions. [2024-06-21 22:08:54,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 169 transitions, 1754 flow [2024-06-21 22:08:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:08:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:08:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 22:08:54,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 22:08:54,341 INFO L175 Difference]: Start difference. First operand has 100 places, 133 transitions, 1227 flow. Second operand 8 states and 146 transitions. [2024-06-21 22:08:54,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 169 transitions, 1754 flow [2024-06-21 22:08:54,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 169 transitions, 1641 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 22:08:54,375 INFO L231 Difference]: Finished difference. Result has 102 places, 135 transitions, 1264 flow [2024-06-21 22:08:54,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1264, PETRI_PLACES=102, PETRI_TRANSITIONS=135} [2024-06-21 22:08:54,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-21 22:08:54,377 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 135 transitions, 1264 flow [2024-06-21 22:08:54,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:08:54,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:54,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:54,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 22:08:54,378 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:54,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:54,378 INFO L85 PathProgramCache]: Analyzing trace with hash -187026460, now seen corresponding path program 4 times [2024-06-21 22:08:54,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:54,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231294672] [2024-06-21 22:08:54,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:54,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:08:56,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:56,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231294672] [2024-06-21 22:08:56,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231294672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:56,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:56,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:08:56,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392767648] [2024-06-21 22:08:56,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:56,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:08:56,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:56,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:08:56,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:08:56,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:56,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 135 transitions, 1264 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:08:56,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:56,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:56,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:08:57,533 INFO L124 PetriNetUnfolderBase]: 1722/2732 cut-off events. [2024-06-21 22:08:57,533 INFO L125 PetriNetUnfolderBase]: For 44020/44020 co-relation queries the response was YES. [2024-06-21 22:08:57,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15571 conditions, 2732 events. 1722/2732 cut-off events. For 44020/44020 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14331 event pairs, 447 based on Foata normal form. 4/2735 useless extension candidates. Maximal degree in co-relation 15529. Up to 2234 conditions per place. [2024-06-21 22:08:57,549 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 106 selfloop transitions, 65 changer transitions 0/176 dead transitions. [2024-06-21 22:08:57,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 176 transitions, 1823 flow [2024-06-21 22:08:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:08:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:08:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 22:08:57,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 22:08:57,551 INFO L175 Difference]: Start difference. First operand has 102 places, 135 transitions, 1264 flow. Second operand 9 states and 164 transitions. [2024-06-21 22:08:57,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 176 transitions, 1823 flow [2024-06-21 22:08:57,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 176 transitions, 1729 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 22:08:57,580 INFO L231 Difference]: Finished difference. Result has 105 places, 137 transitions, 1363 flow [2024-06-21 22:08:57,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1363, PETRI_PLACES=105, PETRI_TRANSITIONS=137} [2024-06-21 22:08:57,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-21 22:08:57,580 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 137 transitions, 1363 flow [2024-06-21 22:08:57,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:08:57,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:08:57,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:08:57,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 22:08:57,581 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:08:57,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:08:57,581 INFO L85 PathProgramCache]: Analyzing trace with hash -186729790, now seen corresponding path program 5 times [2024-06-21 22:08:57,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:08:57,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293985741] [2024-06-21 22:08:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:08:57,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:08:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:08:59,711 INFO 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 22:08:59,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:08:59,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293985741] [2024-06-21 22:08:59,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293985741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:08:59,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:08:59,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:08:59,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090102311] [2024-06-21 22:08:59,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:08:59,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:08:59,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:08:59,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:08:59,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:08:59,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:08:59,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 137 transitions, 1363 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:08:59,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:08:59,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:08:59,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:00,542 INFO L124 PetriNetUnfolderBase]: 1714/2720 cut-off events. [2024-06-21 22:09:00,542 INFO L125 PetriNetUnfolderBase]: For 46004/46004 co-relation queries the response was YES. [2024-06-21 22:09:00,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15769 conditions, 2720 events. 1714/2720 cut-off events. For 46004/46004 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14142 event pairs, 409 based on Foata normal form. 4/2723 useless extension candidates. Maximal degree in co-relation 15726. Up to 1832 conditions per place. [2024-06-21 22:09:00,562 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 71 changer transitions 0/173 dead transitions. [2024-06-21 22:09:00,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 173 transitions, 1899 flow [2024-06-21 22:09:00,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 22:09:00,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 22:09:00,563 INFO L175 Difference]: Start difference. First operand has 105 places, 137 transitions, 1363 flow. Second operand 8 states and 147 transitions. [2024-06-21 22:09:00,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 173 transitions, 1899 flow [2024-06-21 22:09:00,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 173 transitions, 1756 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:00,596 INFO L231 Difference]: Finished difference. Result has 106 places, 139 transitions, 1423 flow [2024-06-21 22:09:00,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1423, PETRI_PLACES=106, PETRI_TRANSITIONS=139} [2024-06-21 22:09:00,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-21 22:09:00,596 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 139 transitions, 1423 flow [2024-06-21 22:09:00,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:00,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:00,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:00,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 22:09:00,597 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:00,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:00,597 INFO L85 PathProgramCache]: Analyzing trace with hash 173596037, now seen corresponding path program 1 times [2024-06-21 22:09:00,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:00,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655355339] [2024-06-21 22:09:00,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:00,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:02,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:02,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655355339] [2024-06-21 22:09:02,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655355339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:02,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:02,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 22:09:02,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254157563] [2024-06-21 22:09:02,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:02,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 22:09:02,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:02,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 22:09:02,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 22:09:02,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:09:02,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 139 transitions, 1423 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 22:09:02,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:02,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:09:02,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:02,914 INFO L124 PetriNetUnfolderBase]: 1538/2507 cut-off events. [2024-06-21 22:09:02,914 INFO L125 PetriNetUnfolderBase]: For 40741/40741 co-relation queries the response was YES. [2024-06-21 22:09:02,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14418 conditions, 2507 events. 1538/2507 cut-off events. For 40741/40741 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13611 event pairs, 612 based on Foata normal form. 2/2498 useless extension candidates. Maximal degree in co-relation 14374. Up to 2369 conditions per place. [2024-06-21 22:09:02,928 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 137 selfloop transitions, 9 changer transitions 0/152 dead transitions. [2024-06-21 22:09:02,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 152 transitions, 1765 flow [2024-06-21 22:09:02,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 22:09:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 22:09:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 22:09:02,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 22:09:02,929 INFO L175 Difference]: Start difference. First operand has 106 places, 139 transitions, 1423 flow. Second operand 5 states and 89 transitions. [2024-06-21 22:09:02,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 152 transitions, 1765 flow [2024-06-21 22:09:02,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 152 transitions, 1584 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:02,958 INFO L231 Difference]: Finished difference. Result has 105 places, 142 transitions, 1292 flow [2024-06-21 22:09:02,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1292, PETRI_PLACES=105, PETRI_TRANSITIONS=142} [2024-06-21 22:09:02,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-21 22:09:02,959 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 142 transitions, 1292 flow [2024-06-21 22:09:02,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 22:09:02,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:02,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:02,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 22:09:02,960 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:02,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:02,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1393123798, now seen corresponding path program 1 times [2024-06-21 22:09:02,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:02,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118912765] [2024-06-21 22:09:02,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:02,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:05,315 INFO 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 22:09:05,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:05,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118912765] [2024-06-21 22:09:05,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118912765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:05,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:05,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:05,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435029499] [2024-06-21 22:09:05,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:05,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:05,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:05,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:05,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:05,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:05,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 142 transitions, 1292 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:05,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:05,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:05,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:06,362 INFO L124 PetriNetUnfolderBase]: 1727/2748 cut-off events. [2024-06-21 22:09:06,363 INFO L125 PetriNetUnfolderBase]: For 45283/45283 co-relation queries the response was YES. [2024-06-21 22:09:06,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15862 conditions, 2748 events. 1727/2748 cut-off events. For 45283/45283 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14497 event pairs, 405 based on Foata normal form. 2/2750 useless extension candidates. Maximal degree in co-relation 15817. Up to 2535 conditions per place. [2024-06-21 22:09:06,378 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 140 selfloop transitions, 41 changer transitions 0/186 dead transitions. [2024-06-21 22:09:06,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 186 transitions, 1864 flow [2024-06-21 22:09:06,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 22:09:06,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 22:09:06,380 INFO L175 Difference]: Start difference. First operand has 105 places, 142 transitions, 1292 flow. Second operand 9 states and 163 transitions. [2024-06-21 22:09:06,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 186 transitions, 1864 flow [2024-06-21 22:09:06,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 186 transitions, 1836 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 22:09:06,410 INFO L231 Difference]: Finished difference. Result has 111 places, 148 transitions, 1459 flow [2024-06-21 22:09:06,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1459, PETRI_PLACES=111, PETRI_TRANSITIONS=148} [2024-06-21 22:09:06,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-21 22:09:06,411 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 148 transitions, 1459 flow [2024-06-21 22:09:06,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:06,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:06,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:06,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 22:09:06,411 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:06,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:06,412 INFO L85 PathProgramCache]: Analyzing trace with hash -838162462, now seen corresponding path program 2 times [2024-06-21 22:09:06,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:06,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978359146] [2024-06-21 22:09:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:06,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:08,978 INFO 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 22:09:08,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:08,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978359146] [2024-06-21 22:09:08,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978359146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:08,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:08,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:08,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389296162] [2024-06-21 22:09:08,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:08,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:08,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:08,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:08,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:09,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:09,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 148 transitions, 1459 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:09,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:09,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:09,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:10,161 INFO L124 PetriNetUnfolderBase]: 1740/2768 cut-off events. [2024-06-21 22:09:10,161 INFO L125 PetriNetUnfolderBase]: For 50419/50419 co-relation queries the response was YES. [2024-06-21 22:09:10,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16618 conditions, 2768 events. 1740/2768 cut-off events. For 50419/50419 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14601 event pairs, 421 based on Foata normal form. 2/2770 useless extension candidates. Maximal degree in co-relation 16572. Up to 2561 conditions per place. [2024-06-21 22:09:10,181 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 151 selfloop transitions, 38 changer transitions 0/194 dead transitions. [2024-06-21 22:09:10,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 194 transitions, 2058 flow [2024-06-21 22:09:10,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:09:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:09:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 22:09:10,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 22:09:10,183 INFO L175 Difference]: Start difference. First operand has 111 places, 148 transitions, 1459 flow. Second operand 10 states and 176 transitions. [2024-06-21 22:09:10,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 194 transitions, 2058 flow [2024-06-21 22:09:10,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 194 transitions, 1917 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:10,221 INFO L231 Difference]: Finished difference. Result has 115 places, 152 transitions, 1498 flow [2024-06-21 22:09:10,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1498, PETRI_PLACES=115, PETRI_TRANSITIONS=152} [2024-06-21 22:09:10,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-21 22:09:10,222 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 152 transitions, 1498 flow [2024-06-21 22:09:10,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:10,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:10,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:10,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 22:09:10,222 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:10,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:10,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1362330728, now seen corresponding path program 3 times [2024-06-21 22:09:10,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:10,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265392311] [2024-06-21 22:09:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:10,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:12,365 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 22:09:12,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:12,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265392311] [2024-06-21 22:09:12,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265392311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:12,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:12,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:12,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899004107] [2024-06-21 22:09:12,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:12,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:12,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:12,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:12,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:12,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:12,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 152 transitions, 1498 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:12,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:12,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:12,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:13,351 INFO L124 PetriNetUnfolderBase]: 1753/2792 cut-off events. [2024-06-21 22:09:13,351 INFO L125 PetriNetUnfolderBase]: For 56356/56356 co-relation queries the response was YES. [2024-06-21 22:09:13,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17195 conditions, 2792 events. 1753/2792 cut-off events. For 56356/56356 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14810 event pairs, 405 based on Foata normal form. 2/2794 useless extension candidates. Maximal degree in co-relation 17147. Up to 2529 conditions per place. [2024-06-21 22:09:13,373 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 134 selfloop transitions, 50 changer transitions 0/189 dead transitions. [2024-06-21 22:09:13,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 189 transitions, 2062 flow [2024-06-21 22:09:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:13,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:09:13,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 22:09:13,374 INFO L175 Difference]: Start difference. First operand has 115 places, 152 transitions, 1498 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:09:13,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 189 transitions, 2062 flow [2024-06-21 22:09:13,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 189 transitions, 1914 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:13,419 INFO L231 Difference]: Finished difference. Result has 116 places, 155 transitions, 1556 flow [2024-06-21 22:09:13,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1556, PETRI_PLACES=116, PETRI_TRANSITIONS=155} [2024-06-21 22:09:13,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 22:09:13,421 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 155 transitions, 1556 flow [2024-06-21 22:09:13,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:13,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:13,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:13,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 22:09:13,421 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:13,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:13,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1510147718, now seen corresponding path program 4 times [2024-06-21 22:09:13,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:13,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292024560] [2024-06-21 22:09:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:13,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:15,648 INFO 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 22:09:15,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:15,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292024560] [2024-06-21 22:09:15,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292024560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:15,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:15,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:15,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522704803] [2024-06-21 22:09:15,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:15,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:15,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:15,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:15,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:15,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 155 transitions, 1556 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:15,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:15,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:15,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:16,677 INFO L124 PetriNetUnfolderBase]: 1766/2814 cut-off events. [2024-06-21 22:09:16,677 INFO L125 PetriNetUnfolderBase]: For 62024/62024 co-relation queries the response was YES. [2024-06-21 22:09:16,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17843 conditions, 2814 events. 1766/2814 cut-off events. For 62024/62024 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14945 event pairs, 411 based on Foata normal form. 2/2816 useless extension candidates. Maximal degree in co-relation 17794. Up to 2416 conditions per place. [2024-06-21 22:09:16,697 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 106 selfloop transitions, 79 changer transitions 0/190 dead transitions. [2024-06-21 22:09:16,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 190 transitions, 2127 flow [2024-06-21 22:09:16,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:09:16,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:09:16,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 22:09:16,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:09:16,700 INFO L175 Difference]: Start difference. First operand has 116 places, 155 transitions, 1556 flow. Second operand 8 states and 144 transitions. [2024-06-21 22:09:16,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 190 transitions, 2127 flow [2024-06-21 22:09:16,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 190 transitions, 1953 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:16,758 INFO L231 Difference]: Finished difference. Result has 118 places, 158 transitions, 1646 flow [2024-06-21 22:09:16,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1646, PETRI_PLACES=118, PETRI_TRANSITIONS=158} [2024-06-21 22:09:16,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 22:09:16,773 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 158 transitions, 1646 flow [2024-06-21 22:09:16,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:16,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:16,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:16,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 22:09:16,774 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:16,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:16,774 INFO L85 PathProgramCache]: Analyzing trace with hash 647995832, now seen corresponding path program 5 times [2024-06-21 22:09:16,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:16,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002115247] [2024-06-21 22:09:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:16,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:19,148 INFO 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 22:09:19,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:19,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002115247] [2024-06-21 22:09:19,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002115247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:19,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:19,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:19,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503287737] [2024-06-21 22:09:19,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:19,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:19,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:19,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:19,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:19,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:19,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 158 transitions, 1646 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:19,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:19,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:19,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:20,269 INFO L124 PetriNetUnfolderBase]: 1779/2842 cut-off events. [2024-06-21 22:09:20,269 INFO L125 PetriNetUnfolderBase]: For 62744/62744 co-relation queries the response was YES. [2024-06-21 22:09:20,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18080 conditions, 2842 events. 1779/2842 cut-off events. For 62744/62744 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15184 event pairs, 428 based on Foata normal form. 2/2843 useless extension candidates. Maximal degree in co-relation 18030. Up to 2571 conditions per place. [2024-06-21 22:09:20,286 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 143 selfloop transitions, 47 changer transitions 0/195 dead transitions. [2024-06-21 22:09:20,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 195 transitions, 2237 flow [2024-06-21 22:09:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:20,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:20,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 22:09:20,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 22:09:20,288 INFO L175 Difference]: Start difference. First operand has 118 places, 158 transitions, 1646 flow. Second operand 9 states and 157 transitions. [2024-06-21 22:09:20,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 195 transitions, 2237 flow [2024-06-21 22:09:20,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 195 transitions, 2001 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:20,339 INFO L231 Difference]: Finished difference. Result has 122 places, 162 transitions, 1619 flow [2024-06-21 22:09:20,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1619, PETRI_PLACES=122, PETRI_TRANSITIONS=162} [2024-06-21 22:09:20,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-21 22:09:20,339 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 162 transitions, 1619 flow [2024-06-21 22:09:20,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:20,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:20,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:09:20,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 22:09:20,340 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:20,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash 904496342, now seen corresponding path program 6 times [2024-06-21 22:09:20,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:20,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396685340] [2024-06-21 22:09:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:20,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:23,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:23,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396685340] [2024-06-21 22:09:23,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396685340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:23,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:23,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:23,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38595349] [2024-06-21 22:09:23,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:23,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:23,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:23,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:23,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:23,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:23,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 162 transitions, 1619 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:23,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:23,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:23,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:24,265 INFO L124 PetriNetUnfolderBase]: 1774/2834 cut-off events. [2024-06-21 22:09:24,266 INFO L125 PetriNetUnfolderBase]: For 61203/61203 co-relation queries the response was YES. [2024-06-21 22:09:24,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17709 conditions, 2834 events. 1774/2834 cut-off events. For 61203/61203 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 15161 event pairs, 428 based on Foata normal form. 2/2835 useless extension candidates. Maximal degree in co-relation 17657. Up to 2457 conditions per place. [2024-06-21 22:09:24,286 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 126 selfloop transitions, 72 changer transitions 0/203 dead transitions. [2024-06-21 22:09:24,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 203 transitions, 2237 flow [2024-06-21 22:09:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:09:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:09:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 22:09:24,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:09:24,288 INFO L175 Difference]: Start difference. First operand has 122 places, 162 transitions, 1619 flow. Second operand 10 states and 175 transitions. [2024-06-21 22:09:24,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 203 transitions, 2237 flow [2024-06-21 22:09:24,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 203 transitions, 2067 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:24,337 INFO L231 Difference]: Finished difference. Result has 126 places, 165 transitions, 1699 flow [2024-06-21 22:09:24,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1699, PETRI_PLACES=126, PETRI_TRANSITIONS=165} [2024-06-21 22:09:24,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 22:09:24,338 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 165 transitions, 1699 flow [2024-06-21 22:09:24,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:24,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:24,338 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 22:09:24,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 22:09:24,339 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:24,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:24,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2033224761, now seen corresponding path program 1 times [2024-06-21 22:09:24,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:24,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455585165] [2024-06-21 22:09:24,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:24,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:26,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:26,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455585165] [2024-06-21 22:09:26,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455585165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:26,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:26,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:26,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554201644] [2024-06-21 22:09:26,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:26,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:26,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:26,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:26,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:26,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:26,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 165 transitions, 1699 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:26,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:26,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:26,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:27,296 INFO L124 PetriNetUnfolderBase]: 1816/2906 cut-off events. [2024-06-21 22:09:27,296 INFO L125 PetriNetUnfolderBase]: For 68143/68143 co-relation queries the response was YES. [2024-06-21 22:09:27,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18470 conditions, 2906 events. 1816/2906 cut-off events. For 68143/68143 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15744 event pairs, 356 based on Foata normal form. 4/2910 useless extension candidates. Maximal degree in co-relation 18417. Up to 2648 conditions per place. [2024-06-21 22:09:27,316 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 172 selfloop transitions, 34 changer transitions 0/211 dead transitions. [2024-06-21 22:09:27,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 211 transitions, 2309 flow [2024-06-21 22:09:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:27,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:09:27,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 22:09:27,318 INFO L175 Difference]: Start difference. First operand has 126 places, 165 transitions, 1699 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:09:27,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 211 transitions, 2309 flow [2024-06-21 22:09:27,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 211 transitions, 2085 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-21 22:09:27,369 INFO L231 Difference]: Finished difference. Result has 128 places, 169 transitions, 1630 flow [2024-06-21 22:09:27,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1630, PETRI_PLACES=128, PETRI_TRANSITIONS=169} [2024-06-21 22:09:27,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 22:09:27,370 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 169 transitions, 1630 flow [2024-06-21 22:09:27,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:27,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:27,370 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 22:09:27,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 22:09:27,371 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:27,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:27,371 INFO L85 PathProgramCache]: Analyzing trace with hash 391579831, now seen corresponding path program 2 times [2024-06-21 22:09:27,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:27,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316490961] [2024-06-21 22:09:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:27,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:29,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:29,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316490961] [2024-06-21 22:09:29,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316490961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:29,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:29,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:29,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920119172] [2024-06-21 22:09:29,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:29,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:29,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:29,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:29,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:29,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:29,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 169 transitions, 1630 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:29,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:29,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:29,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:30,343 INFO L124 PetriNetUnfolderBase]: 1836/2938 cut-off events. [2024-06-21 22:09:30,343 INFO L125 PetriNetUnfolderBase]: For 65769/65769 co-relation queries the response was YES. [2024-06-21 22:09:30,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18337 conditions, 2938 events. 1836/2938 cut-off events. For 65769/65769 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15906 event pairs, 375 based on Foata normal form. 4/2942 useless extension candidates. Maximal degree in co-relation 18282. Up to 2698 conditions per place. [2024-06-21 22:09:30,366 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 168 selfloop transitions, 37 changer transitions 0/210 dead transitions. [2024-06-21 22:09:30,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 210 transitions, 2224 flow [2024-06-21 22:09:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 22:09:30,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 22:09:30,368 INFO L175 Difference]: Start difference. First operand has 128 places, 169 transitions, 1630 flow. Second operand 9 states and 163 transitions. [2024-06-21 22:09:30,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 210 transitions, 2224 flow [2024-06-21 22:09:30,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 210 transitions, 2109 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:30,426 INFO L231 Difference]: Finished difference. Result has 131 places, 171 transitions, 1663 flow [2024-06-21 22:09:30,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1663, PETRI_PLACES=131, PETRI_TRANSITIONS=171} [2024-06-21 22:09:30,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-21 22:09:30,427 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 171 transitions, 1663 flow [2024-06-21 22:09:30,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:30,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:30,428 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 22:09:30,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 22:09:30,428 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:30,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:30,428 INFO L85 PathProgramCache]: Analyzing trace with hash 2015761807, now seen corresponding path program 1 times [2024-06-21 22:09:30,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:30,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713212851] [2024-06-21 22:09:30,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:30,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:32,603 INFO 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 22:09:32,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:32,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713212851] [2024-06-21 22:09:32,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713212851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:32,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:32,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:32,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634594792] [2024-06-21 22:09:32,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:32,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:32,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:32,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:32,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:32,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 171 transitions, 1663 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:32,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:32,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:32,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:33,840 INFO L124 PetriNetUnfolderBase]: 1904/3072 cut-off events. [2024-06-21 22:09:33,840 INFO L125 PetriNetUnfolderBase]: For 78603/78603 co-relation queries the response was YES. [2024-06-21 22:09:33,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19427 conditions, 3072 events. 1904/3072 cut-off events. For 78603/78603 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16991 event pairs, 423 based on Foata normal form. 16/3088 useless extension candidates. Maximal degree in co-relation 19371. Up to 2728 conditions per place. [2024-06-21 22:09:33,864 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 178 selfloop transitions, 36 changer transitions 0/219 dead transitions. [2024-06-21 22:09:33,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 219 transitions, 2325 flow [2024-06-21 22:09:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:09:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:09:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 22:09:33,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-21 22:09:33,866 INFO L175 Difference]: Start difference. First operand has 131 places, 171 transitions, 1663 flow. Second operand 10 states and 179 transitions. [2024-06-21 22:09:33,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 219 transitions, 2325 flow [2024-06-21 22:09:33,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 219 transitions, 2197 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:33,924 INFO L231 Difference]: Finished difference. Result has 134 places, 172 transitions, 1666 flow [2024-06-21 22:09:33,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1666, PETRI_PLACES=134, PETRI_TRANSITIONS=172} [2024-06-21 22:09:33,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-21 22:09:33,924 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 172 transitions, 1666 flow [2024-06-21 22:09:33,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:33,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:33,925 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 22:09:33,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 22:09:33,925 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:33,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:33,925 INFO L85 PathProgramCache]: Analyzing trace with hash -212993371, now seen corresponding path program 2 times [2024-06-21 22:09:33,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:33,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113866427] [2024-06-21 22:09:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:33,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:36,276 INFO 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 22:09:36,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:36,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113866427] [2024-06-21 22:09:36,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113866427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:36,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:36,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:36,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760690762] [2024-06-21 22:09:36,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:36,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:36,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:36,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:36,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:36,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:36,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 172 transitions, 1666 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:36,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:36,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:36,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:37,563 INFO L124 PetriNetUnfolderBase]: 2048/3316 cut-off events. [2024-06-21 22:09:37,564 INFO L125 PetriNetUnfolderBase]: For 92554/92554 co-relation queries the response was YES. [2024-06-21 22:09:37,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21730 conditions, 3316 events. 2048/3316 cut-off events. For 92554/92554 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 18823 event pairs, 461 based on Foata normal form. 12/3328 useless extension candidates. Maximal degree in co-relation 21673. Up to 2669 conditions per place. [2024-06-21 22:09:37,590 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 181 selfloop transitions, 40 changer transitions 0/226 dead transitions. [2024-06-21 22:09:37,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 226 transitions, 2546 flow [2024-06-21 22:09:37,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:09:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:09:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 22:09:37,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 22:09:37,593 INFO L175 Difference]: Start difference. First operand has 134 places, 172 transitions, 1666 flow. Second operand 10 states and 184 transitions. [2024-06-21 22:09:37,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 226 transitions, 2546 flow [2024-06-21 22:09:37,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 226 transitions, 2461 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 22:09:37,667 INFO L231 Difference]: Finished difference. Result has 136 places, 174 transitions, 1769 flow [2024-06-21 22:09:37,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1769, PETRI_PLACES=136, PETRI_TRANSITIONS=174} [2024-06-21 22:09:37,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-21 22:09:37,669 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 174 transitions, 1769 flow [2024-06-21 22:09:37,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:37,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:37,669 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 22:09:37,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 22:09:37,669 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:37,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:37,670 INFO L85 PathProgramCache]: Analyzing trace with hash 678944185, now seen corresponding path program 3 times [2024-06-21 22:09:37,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:37,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998851155] [2024-06-21 22:09:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:37,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:40,018 INFO 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 22:09:40,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:40,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998851155] [2024-06-21 22:09:40,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998851155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:40,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:40,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:40,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989001391] [2024-06-21 22:09:40,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:40,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:40,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:40,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:40,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:40,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:40,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 174 transitions, 1769 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:40,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:40,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:40,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:41,334 INFO L124 PetriNetUnfolderBase]: 2020/3262 cut-off events. [2024-06-21 22:09:41,334 INFO L125 PetriNetUnfolderBase]: For 91877/91877 co-relation queries the response was YES. [2024-06-21 22:09:41,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21077 conditions, 3262 events. 2020/3262 cut-off events. For 91877/91877 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18381 event pairs, 421 based on Foata normal form. 16/3278 useless extension candidates. Maximal degree in co-relation 21019. Up to 2811 conditions per place. [2024-06-21 22:09:41,355 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 151 selfloop transitions, 65 changer transitions 0/221 dead transitions. [2024-06-21 22:09:41,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 221 transitions, 2397 flow [2024-06-21 22:09:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:09:41,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:09:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 22:09:41,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 22:09:41,357 INFO L175 Difference]: Start difference. First operand has 136 places, 174 transitions, 1769 flow. Second operand 10 states and 181 transitions. [2024-06-21 22:09:41,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 221 transitions, 2397 flow [2024-06-21 22:09:41,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 221 transitions, 2314 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:41,422 INFO L231 Difference]: Finished difference. Result has 141 places, 175 transitions, 1856 flow [2024-06-21 22:09:41,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1856, PETRI_PLACES=141, PETRI_TRANSITIONS=175} [2024-06-21 22:09:41,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-21 22:09:41,423 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 175 transitions, 1856 flow [2024-06-21 22:09:41,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:41,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:41,423 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 22:09:41,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 22:09:41,424 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:41,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:41,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1115370313, now seen corresponding path program 3 times [2024-06-21 22:09:41,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:41,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133711541] [2024-06-21 22:09:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:41,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:09:43,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:43,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133711541] [2024-06-21 22:09:43,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133711541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:43,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:43,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:43,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123734846] [2024-06-21 22:09:43,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:43,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:43,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:43,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:43,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:43,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:43,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 175 transitions, 1856 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:43,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:43,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:43,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:44,158 INFO L124 PetriNetUnfolderBase]: 2138/3469 cut-off events. [2024-06-21 22:09:44,158 INFO L125 PetriNetUnfolderBase]: For 97785/97785 co-relation queries the response was YES. [2024-06-21 22:09:44,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22449 conditions, 3469 events. 2138/3469 cut-off events. For 97785/97785 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 19972 event pairs, 445 based on Foata normal form. 16/3485 useless extension candidates. Maximal degree in co-relation 22388. Up to 3074 conditions per place. [2024-06-21 22:09:44,186 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 187 selfloop transitions, 37 changer transitions 0/229 dead transitions. [2024-06-21 22:09:44,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 229 transitions, 2568 flow [2024-06-21 22:09:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:44,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 22:09:44,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 22:09:44,188 INFO L175 Difference]: Start difference. First operand has 141 places, 175 transitions, 1856 flow. Second operand 9 states and 167 transitions. [2024-06-21 22:09:44,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 229 transitions, 2568 flow [2024-06-21 22:09:44,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 229 transitions, 2467 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:44,281 INFO L231 Difference]: Finished difference. Result has 144 places, 181 transitions, 1937 flow [2024-06-21 22:09:44,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1937, PETRI_PLACES=144, PETRI_TRANSITIONS=181} [2024-06-21 22:09:44,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 22:09:44,282 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 181 transitions, 1937 flow [2024-06-21 22:09:44,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:44,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:44,282 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 22:09:44,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 22:09:44,282 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:44,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:44,283 INFO L85 PathProgramCache]: Analyzing trace with hash -854225383, now seen corresponding path program 4 times [2024-06-21 22:09:44,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:44,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154053610] [2024-06-21 22:09:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:44,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:45,957 INFO 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 22:09:45,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:45,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154053610] [2024-06-21 22:09:45,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154053610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:45,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:45,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:45,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078513035] [2024-06-21 22:09:45,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:45,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:45,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:45,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:45,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:45,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:45,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 181 transitions, 1937 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:45,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:45,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:45,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:47,130 INFO L124 PetriNetUnfolderBase]: 2172/3529 cut-off events. [2024-06-21 22:09:47,130 INFO L125 PetriNetUnfolderBase]: For 99758/99758 co-relation queries the response was YES. [2024-06-21 22:09:47,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22914 conditions, 3529 events. 2172/3529 cut-off events. For 99758/99758 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 20458 event pairs, 519 based on Foata normal form. 4/3533 useless extension candidates. Maximal degree in co-relation 22851. Up to 3256 conditions per place. [2024-06-21 22:09:47,158 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 181 selfloop transitions, 41 changer transitions 0/227 dead transitions. [2024-06-21 22:09:47,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 227 transitions, 2606 flow [2024-06-21 22:09:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:47,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 22:09:47,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 22:09:47,160 INFO L175 Difference]: Start difference. First operand has 144 places, 181 transitions, 1937 flow. Second operand 9 states and 163 transitions. [2024-06-21 22:09:47,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 227 transitions, 2606 flow [2024-06-21 22:09:47,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 227 transitions, 2524 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 22:09:47,267 INFO L231 Difference]: Finished difference. Result has 148 places, 186 transitions, 2058 flow [2024-06-21 22:09:47,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1855, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2058, PETRI_PLACES=148, PETRI_TRANSITIONS=186} [2024-06-21 22:09:47,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-21 22:09:47,268 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 186 transitions, 2058 flow [2024-06-21 22:09:47,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:47,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:47,268 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 22:09:47,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 22:09:47,268 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:47,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:47,268 INFO L85 PathProgramCache]: Analyzing trace with hash -638479613, now seen corresponding path program 5 times [2024-06-21 22:09:47,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:47,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132480590] [2024-06-21 22:09:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:47,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:47,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:48,744 INFO 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 22:09:48,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:48,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132480590] [2024-06-21 22:09:48,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132480590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:48,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:48,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:48,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216247360] [2024-06-21 22:09:48,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:48,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:48,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:48,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:48,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:48,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:48,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 186 transitions, 2058 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:48,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:48,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:48,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:49,945 INFO L124 PetriNetUnfolderBase]: 2270/3689 cut-off events. [2024-06-21 22:09:49,945 INFO L125 PetriNetUnfolderBase]: For 105834/105834 co-relation queries the response was YES. [2024-06-21 22:09:49,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24059 conditions, 3689 events. 2270/3689 cut-off events. For 105834/105834 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21393 event pairs, 360 based on Foata normal form. 4/3693 useless extension candidates. Maximal degree in co-relation 23994. Up to 3250 conditions per place. [2024-06-21 22:09:49,974 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 187 selfloop transitions, 49 changer transitions 0/241 dead transitions. [2024-06-21 22:09:49,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 241 transitions, 2848 flow [2024-06-21 22:09:49,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:09:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:09:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 22:09:49,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 22:09:49,976 INFO L175 Difference]: Start difference. First operand has 148 places, 186 transitions, 2058 flow. Second operand 9 states and 163 transitions. [2024-06-21 22:09:49,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 241 transitions, 2848 flow [2024-06-21 22:09:50,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 241 transitions, 2692 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:50,087 INFO L231 Difference]: Finished difference. Result has 151 places, 198 transitions, 2220 flow [2024-06-21 22:09:50,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2220, PETRI_PLACES=151, PETRI_TRANSITIONS=198} [2024-06-21 22:09:50,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-21 22:09:50,088 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 198 transitions, 2220 flow [2024-06-21 22:09:50,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:50,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:50,088 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 22:09:50,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 22:09:50,089 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:50,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:50,089 INFO L85 PathProgramCache]: Analyzing trace with hash -854220423, now seen corresponding path program 4 times [2024-06-21 22:09:50,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:50,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380728777] [2024-06-21 22:09:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:50,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:52,373 INFO 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 22:09:52,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:52,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380728777] [2024-06-21 22:09:52,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380728777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:52,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:52,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:09:52,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032163839] [2024-06-21 22:09:52,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:52,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:09:52,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:09:52,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:09:52,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:52,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 198 transitions, 2220 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:52,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:52,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:52,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:53,729 INFO L124 PetriNetUnfolderBase]: 2386/3891 cut-off events. [2024-06-21 22:09:53,730 INFO L125 PetriNetUnfolderBase]: For 123372/123372 co-relation queries the response was YES. [2024-06-21 22:09:53,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26093 conditions, 3891 events. 2386/3891 cut-off events. For 123372/123372 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 23161 event pairs, 562 based on Foata normal form. 16/3907 useless extension candidates. Maximal degree in co-relation 26026. Up to 3444 conditions per place. [2024-06-21 22:09:53,762 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 199 selfloop transitions, 45 changer transitions 0/249 dead transitions. [2024-06-21 22:09:53,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 249 transitions, 3006 flow [2024-06-21 22:09:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:09:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:09:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 22:09:53,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 22:09:53,764 INFO L175 Difference]: Start difference. First operand has 151 places, 198 transitions, 2220 flow. Second operand 10 states and 181 transitions. [2024-06-21 22:09:53,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 249 transitions, 3006 flow [2024-06-21 22:09:53,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 249 transitions, 2810 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-21 22:09:53,896 INFO L231 Difference]: Finished difference. Result has 154 places, 200 transitions, 2218 flow [2024-06-21 22:09:53,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2218, PETRI_PLACES=154, PETRI_TRANSITIONS=200} [2024-06-21 22:09:53,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-21 22:09:53,897 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 200 transitions, 2218 flow [2024-06-21 22:09:53,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:53,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:53,897 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 22:09:53,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 22:09:53,897 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:53,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:53,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1039505178, now seen corresponding path program 1 times [2024-06-21 22:09:53,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:53,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596760834] [2024-06-21 22:09:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:53,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:55,544 INFO 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 22:09:55,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:55,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596760834] [2024-06-21 22:09:55,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596760834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:55,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:55,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:09:55,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91217866] [2024-06-21 22:09:55,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:55,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:09:55,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:55,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:09:55,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:09:55,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:55,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 200 transitions, 2218 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:55,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:55,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:55,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:09:56,774 INFO L124 PetriNetUnfolderBase]: 2396/3892 cut-off events. [2024-06-21 22:09:56,774 INFO L125 PetriNetUnfolderBase]: For 120589/120589 co-relation queries the response was YES. [2024-06-21 22:09:56,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26003 conditions, 3892 events. 2396/3892 cut-off events. For 120589/120589 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 23083 event pairs, 520 based on Foata normal form. 2/3894 useless extension candidates. Maximal degree in co-relation 25936. Up to 3648 conditions per place. [2024-06-21 22:09:56,802 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 196 selfloop transitions, 34 changer transitions 0/235 dead transitions. [2024-06-21 22:09:56,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 235 transitions, 2926 flow [2024-06-21 22:09:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:09:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:09:56,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 22:09:56,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 22:09:56,804 INFO L175 Difference]: Start difference. First operand has 154 places, 200 transitions, 2218 flow. Second operand 7 states and 128 transitions. [2024-06-21 22:09:56,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 235 transitions, 2926 flow [2024-06-21 22:09:56,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 235 transitions, 2790 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 22:09:56,910 INFO L231 Difference]: Finished difference. Result has 153 places, 209 transitions, 2263 flow [2024-06-21 22:09:56,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2263, PETRI_PLACES=153, PETRI_TRANSITIONS=209} [2024-06-21 22:09:56,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-21 22:09:56,911 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 209 transitions, 2263 flow [2024-06-21 22:09:56,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:09:56,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:09:56,911 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 22:09:56,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 22:09:56,911 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:09:56,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:09:56,911 INFO L85 PathProgramCache]: Analyzing trace with hash 542038555, now seen corresponding path program 6 times [2024-06-21 22:09:56,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:09:56,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581476449] [2024-06-21 22:09:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:09:56,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:09:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:09:58,871 INFO 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 22:09:58,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:09:58,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581476449] [2024-06-21 22:09:58,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581476449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:09:58,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:09:58,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:09:58,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396286873] [2024-06-21 22:09:58,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:09:58,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:09:58,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:09:58,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:09:58,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:09:58,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:09:58,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 209 transitions, 2263 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:09:58,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:09:58,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:09:58,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:00,286 INFO L124 PetriNetUnfolderBase]: 2416/3929 cut-off events. [2024-06-21 22:10:00,287 INFO L125 PetriNetUnfolderBase]: For 125699/125699 co-relation queries the response was YES. [2024-06-21 22:10:00,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26500 conditions, 3929 events. 2416/3929 cut-off events. For 125699/125699 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23179 event pairs, 442 based on Foata normal form. 4/3933 useless extension candidates. Maximal degree in co-relation 26431. Up to 3390 conditions per place. [2024-06-21 22:10:00,320 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 53 changer transitions 0/248 dead transitions. [2024-06-21 22:10:00,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 248 transitions, 2997 flow [2024-06-21 22:10:00,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:10:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:10:00,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:10:00,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 22:10:00,322 INFO L175 Difference]: Start difference. First operand has 153 places, 209 transitions, 2263 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:10:00,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 248 transitions, 2997 flow [2024-06-21 22:10:00,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 248 transitions, 2948 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 22:10:00,513 INFO L231 Difference]: Finished difference. Result has 159 places, 212 transitions, 2468 flow [2024-06-21 22:10:00,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2468, PETRI_PLACES=159, PETRI_TRANSITIONS=212} [2024-06-21 22:10:00,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-21 22:10:00,513 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 212 transitions, 2468 flow [2024-06-21 22:10:00,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:10:00,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:00,514 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 22:10:00,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 22:10:00,514 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:00,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:00,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1465453533, now seen corresponding path program 7 times [2024-06-21 22:10:00,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:00,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446687444] [2024-06-21 22:10:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:00,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:02,456 INFO 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 22:10:02,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:02,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446687444] [2024-06-21 22:10:02,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446687444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:02,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:02,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:10:02,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986646152] [2024-06-21 22:10:02,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:02,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:10:02,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:02,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:10:02,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:10:02,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:02,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 212 transitions, 2468 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:10:02,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:02,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:02,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:03,864 INFO L124 PetriNetUnfolderBase]: 2408/3923 cut-off events. [2024-06-21 22:10:03,865 INFO L125 PetriNetUnfolderBase]: For 130769/130769 co-relation queries the response was YES. [2024-06-21 22:10:03,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26944 conditions, 3923 events. 2408/3923 cut-off events. For 130769/130769 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 23376 event pairs, 614 based on Foata normal form. 4/3927 useless extension candidates. Maximal degree in co-relation 26872. Up to 3578 conditions per place. [2024-06-21 22:10:03,897 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 196 selfloop transitions, 48 changer transitions 0/249 dead transitions. [2024-06-21 22:10:03,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 249 transitions, 3168 flow [2024-06-21 22:10:03,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:10:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:10:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 22:10:03,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 22:10:03,899 INFO L175 Difference]: Start difference. First operand has 159 places, 212 transitions, 2468 flow. Second operand 8 states and 145 transitions. [2024-06-21 22:10:03,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 249 transitions, 3168 flow [2024-06-21 22:10:04,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 249 transitions, 2954 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-21 22:10:04,101 INFO L231 Difference]: Finished difference. Result has 161 places, 214 transitions, 2456 flow [2024-06-21 22:10:04,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2456, PETRI_PLACES=161, PETRI_TRANSITIONS=214} [2024-06-21 22:10:04,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-21 22:10:04,102 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 214 transitions, 2456 flow [2024-06-21 22:10:04,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 22:10:04,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:04,102 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 22:10:04,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 22:10:04,102 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:04,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:04,103 INFO L85 PathProgramCache]: Analyzing trace with hash -717418367, now seen corresponding path program 5 times [2024-06-21 22:10:04,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:04,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804143182] [2024-06-21 22:10:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:04,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:06,636 INFO 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 22:10:06,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:06,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804143182] [2024-06-21 22:10:06,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804143182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:06,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:06,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:06,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037415091] [2024-06-21 22:10:06,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:06,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:06,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:06,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:06,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:06,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:06,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 214 transitions, 2456 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:06,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:06,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:06,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:08,046 INFO L124 PetriNetUnfolderBase]: 2476/4053 cut-off events. [2024-06-21 22:10:08,047 INFO L125 PetriNetUnfolderBase]: For 133905/133905 co-relation queries the response was YES. [2024-06-21 22:10:08,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27314 conditions, 4053 events. 2476/4053 cut-off events. For 133905/133905 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 24352 event pairs, 574 based on Foata normal form. 16/4069 useless extension candidates. Maximal degree in co-relation 27241. Up to 3326 conditions per place. [2024-06-21 22:10:08,083 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 197 selfloop transitions, 56 changer transitions 0/258 dead transitions. [2024-06-21 22:10:08,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 258 transitions, 3216 flow [2024-06-21 22:10:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 22:10:08,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 22:10:08,085 INFO L175 Difference]: Start difference. First operand has 161 places, 214 transitions, 2456 flow. Second operand 9 states and 163 transitions. [2024-06-21 22:10:08,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 258 transitions, 3216 flow [2024-06-21 22:10:08,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 258 transitions, 3042 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 22:10:08,269 INFO L231 Difference]: Finished difference. Result has 164 places, 215 transitions, 2472 flow [2024-06-21 22:10:08,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2472, PETRI_PLACES=164, PETRI_TRANSITIONS=215} [2024-06-21 22:10:08,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-21 22:10:08,269 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 215 transitions, 2472 flow [2024-06-21 22:10:08,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:08,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:08,270 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 22:10:08,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 22:10:08,270 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:08,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:08,270 INFO L85 PathProgramCache]: Analyzing trace with hash -429821823, now seen corresponding path program 6 times [2024-06-21 22:10:08,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:08,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738213211] [2024-06-21 22:10:08,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:08,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:10,770 INFO 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 22:10:10,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:10,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738213211] [2024-06-21 22:10:10,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738213211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:10,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:10,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:10,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473889134] [2024-06-21 22:10:10,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:10,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:10,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:10,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:10,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:10,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 215 transitions, 2472 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:10,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:10,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:10,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:12,532 INFO L124 PetriNetUnfolderBase]: 2716/4463 cut-off events. [2024-06-21 22:10:12,533 INFO L125 PetriNetUnfolderBase]: For 149149/149149 co-relation queries the response was YES. [2024-06-21 22:10:12,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30596 conditions, 4463 events. 2716/4463 cut-off events. For 149149/149149 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27262 event pairs, 577 based on Foata normal form. 12/4474 useless extension candidates. Maximal degree in co-relation 30522. Up to 2910 conditions per place. [2024-06-21 22:10:12,567 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 168 selfloop transitions, 91 changer transitions 0/264 dead transitions. [2024-06-21 22:10:12,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 264 transitions, 3515 flow [2024-06-21 22:10:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:12,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 22:10:12,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 22:10:12,579 INFO L175 Difference]: Start difference. First operand has 164 places, 215 transitions, 2472 flow. Second operand 9 states and 166 transitions. [2024-06-21 22:10:12,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 264 transitions, 3515 flow [2024-06-21 22:10:12,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 264 transitions, 3347 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 22:10:12,764 INFO L231 Difference]: Finished difference. Result has 167 places, 219 transitions, 2719 flow [2024-06-21 22:10:12,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2719, PETRI_PLACES=167, PETRI_TRANSITIONS=219} [2024-06-21 22:10:12,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-21 22:10:12,767 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 219 transitions, 2719 flow [2024-06-21 22:10:12,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:12,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:12,768 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 22:10:12,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 22:10:12,768 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:12,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:12,768 INFO L85 PathProgramCache]: Analyzing trace with hash -430058973, now seen corresponding path program 7 times [2024-06-21 22:10:12,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:12,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761881683] [2024-06-21 22:10:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:12,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:15,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:15,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761881683] [2024-06-21 22:10:15,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761881683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:15,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:15,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:15,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190284480] [2024-06-21 22:10:15,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:15,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:15,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:15,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:15,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:15,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:15,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 219 transitions, 2719 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:15,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:15,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:15,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:17,325 INFO L124 PetriNetUnfolderBase]: 2688/4430 cut-off events. [2024-06-21 22:10:17,325 INFO L125 PetriNetUnfolderBase]: For 130708/130708 co-relation queries the response was YES. [2024-06-21 22:10:17,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29488 conditions, 4430 events. 2688/4430 cut-off events. For 130708/130708 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27423 event pairs, 737 based on Foata normal form. 16/4446 useless extension candidates. Maximal degree in co-relation 29412. Up to 3826 conditions per place. [2024-06-21 22:10:17,366 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 206 selfloop transitions, 56 changer transitions 0/267 dead transitions. [2024-06-21 22:10:17,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 267 transitions, 3530 flow [2024-06-21 22:10:17,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:10:17,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:10:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 22:10:17,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 22:10:17,368 INFO L175 Difference]: Start difference. First operand has 167 places, 219 transitions, 2719 flow. Second operand 10 states and 177 transitions. [2024-06-21 22:10:17,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 267 transitions, 3530 flow [2024-06-21 22:10:17,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 267 transitions, 3377 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 22:10:17,573 INFO L231 Difference]: Finished difference. Result has 171 places, 222 transitions, 2781 flow [2024-06-21 22:10:17,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2566, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2781, PETRI_PLACES=171, PETRI_TRANSITIONS=222} [2024-06-21 22:10:17,574 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 22:10:17,574 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 222 transitions, 2781 flow [2024-06-21 22:10:17,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:17,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:17,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:10:17,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 22:10:17,575 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:17,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:17,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1386726513, now seen corresponding path program 8 times [2024-06-21 22:10:17,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:17,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492144724] [2024-06-21 22:10:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:17,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:19,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:19,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492144724] [2024-06-21 22:10:19,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492144724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:19,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:19,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:19,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964841741] [2024-06-21 22:10:19,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:19,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:19,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:19,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:19,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:19,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:19,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 222 transitions, 2781 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:19,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:19,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:19,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:21,402 INFO L124 PetriNetUnfolderBase]: 2880/4750 cut-off events. [2024-06-21 22:10:21,403 INFO L125 PetriNetUnfolderBase]: For 141569/141569 co-relation queries the response was YES. [2024-06-21 22:10:21,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32456 conditions, 4750 events. 2880/4750 cut-off events. For 141569/141569 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29810 event pairs, 661 based on Foata normal form. 12/4759 useless extension candidates. Maximal degree in co-relation 32379. Up to 3980 conditions per place. [2024-06-21 22:10:21,445 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 193 selfloop transitions, 69 changer transitions 0/267 dead transitions. [2024-06-21 22:10:21,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 267 transitions, 3777 flow [2024-06-21 22:10:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:10:21,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 22:10:21,447 INFO L175 Difference]: Start difference. First operand has 171 places, 222 transitions, 2781 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:10:21,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 267 transitions, 3777 flow [2024-06-21 22:10:21,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 267 transitions, 3632 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 22:10:21,643 INFO L231 Difference]: Finished difference. Result has 171 places, 225 transitions, 2938 flow [2024-06-21 22:10:21,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2640, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2938, PETRI_PLACES=171, PETRI_TRANSITIONS=225} [2024-06-21 22:10:21,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-21 22:10:21,644 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 225 transitions, 2938 flow [2024-06-21 22:10:21,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:21,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:21,644 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 22:10:21,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 22:10:21,644 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:21,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:21,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1386963663, now seen corresponding path program 9 times [2024-06-21 22:10:21,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:21,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586629817] [2024-06-21 22:10:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:21,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:23,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:23,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586629817] [2024-06-21 22:10:23,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586629817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:23,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:23,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:23,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312689620] [2024-06-21 22:10:23,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:23,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:23,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:23,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:23,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:23,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:23,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 225 transitions, 2938 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:23,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:23,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:23,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:25,406 INFO L124 PetriNetUnfolderBase]: 2852/4708 cut-off events. [2024-06-21 22:10:25,407 INFO L125 PetriNetUnfolderBase]: For 138572/138572 co-relation queries the response was YES. [2024-06-21 22:10:25,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31603 conditions, 4708 events. 2852/4708 cut-off events. For 138572/138572 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 29606 event pairs, 663 based on Foata normal form. 16/4721 useless extension candidates. Maximal degree in co-relation 31527. Up to 4190 conditions per place. [2024-06-21 22:10:25,448 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 190 selfloop transitions, 67 changer transitions 0/262 dead transitions. [2024-06-21 22:10:25,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 262 transitions, 3630 flow [2024-06-21 22:10:25,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 22:10:25,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 22:10:25,450 INFO L175 Difference]: Start difference. First operand has 171 places, 225 transitions, 2938 flow. Second operand 9 states and 161 transitions. [2024-06-21 22:10:25,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 262 transitions, 3630 flow [2024-06-21 22:10:25,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 262 transitions, 3493 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 22:10:25,710 INFO L231 Difference]: Finished difference. Result has 175 places, 225 transitions, 2942 flow [2024-06-21 22:10:25,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2942, PETRI_PLACES=175, PETRI_TRANSITIONS=225} [2024-06-21 22:10:25,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-21 22:10:25,712 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 225 transitions, 2942 flow [2024-06-21 22:10:25,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:25,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:25,713 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 22:10:25,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 22:10:25,717 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:25,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:25,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2025145295, now seen corresponding path program 10 times [2024-06-21 22:10:25,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:25,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600011925] [2024-06-21 22:10:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:25,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:28,266 INFO 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 22:10:28,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:28,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600011925] [2024-06-21 22:10:28,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600011925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:28,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:28,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:28,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657968869] [2024-06-21 22:10:28,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:28,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:28,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:28,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:28,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:28,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:28,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 225 transitions, 2942 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:28,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:28,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:28,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:29,812 INFO L124 PetriNetUnfolderBase]: 2996/4984 cut-off events. [2024-06-21 22:10:29,812 INFO L125 PetriNetUnfolderBase]: For 152545/152545 co-relation queries the response was YES. [2024-06-21 22:10:29,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34161 conditions, 4984 events. 2996/4984 cut-off events. For 152545/152545 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 31989 event pairs, 814 based on Foata normal form. 12/4995 useless extension candidates. Maximal degree in co-relation 34083. Up to 3837 conditions per place. [2024-06-21 22:10:29,854 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 192 selfloop transitions, 78 changer transitions 0/275 dead transitions. [2024-06-21 22:10:29,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 275 transitions, 3972 flow [2024-06-21 22:10:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:10:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:10:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 22:10:29,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-21 22:10:29,868 INFO L175 Difference]: Start difference. First operand has 175 places, 225 transitions, 2942 flow. Second operand 10 states and 183 transitions. [2024-06-21 22:10:29,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 275 transitions, 3972 flow [2024-06-21 22:10:30,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 275 transitions, 3839 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 22:10:30,017 INFO L231 Difference]: Finished difference. Result has 178 places, 227 transitions, 3091 flow [2024-06-21 22:10:30,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3091, PETRI_PLACES=178, PETRI_TRANSITIONS=227} [2024-06-21 22:10:30,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 22:10:30,017 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 227 transitions, 3091 flow [2024-06-21 22:10:30,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:30,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:30,018 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 22:10:30,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 22:10:30,018 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:30,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:30,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2025382445, now seen corresponding path program 11 times [2024-06-21 22:10:30,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:30,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754416439] [2024-06-21 22:10:30,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:30,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:32,247 INFO 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 22:10:32,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:32,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754416439] [2024-06-21 22:10:32,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754416439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:32,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:32,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:32,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412920320] [2024-06-21 22:10:32,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:32,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:32,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:32,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:32,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:32,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:32,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 227 transitions, 3091 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:32,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:32,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:32,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:33,699 INFO L124 PetriNetUnfolderBase]: 2968/4920 cut-off events. [2024-06-21 22:10:33,699 INFO L125 PetriNetUnfolderBase]: For 153782/153782 co-relation queries the response was YES. [2024-06-21 22:10:33,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33564 conditions, 4920 events. 2968/4920 cut-off events. For 153782/153782 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 31405 event pairs, 693 based on Foata normal form. 16/4933 useless extension candidates. Maximal degree in co-relation 33485. Up to 4243 conditions per place. [2024-06-21 22:10:33,743 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 102 changer transitions 0/264 dead transitions. [2024-06-21 22:10:33,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 264 transitions, 3787 flow [2024-06-21 22:10:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 22:10:33,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 22:10:33,745 INFO L175 Difference]: Start difference. First operand has 178 places, 227 transitions, 3091 flow. Second operand 9 states and 161 transitions. [2024-06-21 22:10:33,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 264 transitions, 3787 flow [2024-06-21 22:10:33,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 264 transitions, 3648 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 22:10:33,945 INFO L231 Difference]: Finished difference. Result has 180 places, 227 transitions, 3163 flow [2024-06-21 22:10:33,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2952, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3163, PETRI_PLACES=180, PETRI_TRANSITIONS=227} [2024-06-21 22:10:33,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 22:10:33,946 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 227 transitions, 3163 flow [2024-06-21 22:10:33,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:33,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:33,946 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 22:10:33,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 22:10:33,947 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:33,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:33,947 INFO L85 PathProgramCache]: Analyzing trace with hash 941355137, now seen corresponding path program 12 times [2024-06-21 22:10:33,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:33,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910104889] [2024-06-21 22:10:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:33,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:36,219 INFO 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 22:10:36,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:36,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910104889] [2024-06-21 22:10:36,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910104889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:36,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:36,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:36,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944272771] [2024-06-21 22:10:36,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:36,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:36,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:36,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:36,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:36,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:36,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 227 transitions, 3163 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:36,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:36,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:36,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:37,857 INFO L124 PetriNetUnfolderBase]: 2988/4964 cut-off events. [2024-06-21 22:10:37,858 INFO L125 PetriNetUnfolderBase]: For 147438/147438 co-relation queries the response was YES. [2024-06-21 22:10:37,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33717 conditions, 4964 events. 2988/4964 cut-off events. For 147438/147438 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 31450 event pairs, 634 based on Foata normal form. 12/4973 useless extension candidates. Maximal degree in co-relation 33637. Up to 2645 conditions per place. [2024-06-21 22:10:37,905 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 120 changer transitions 0/269 dead transitions. [2024-06-21 22:10:37,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 269 transitions, 3963 flow [2024-06-21 22:10:37,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:10:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:10:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 22:10:37,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 22:10:37,910 INFO L175 Difference]: Start difference. First operand has 180 places, 227 transitions, 3163 flow. Second operand 9 states and 164 transitions. [2024-06-21 22:10:37,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 269 transitions, 3963 flow [2024-06-21 22:10:38,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 269 transitions, 3722 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 22:10:38,160 INFO L231 Difference]: Finished difference. Result has 180 places, 228 transitions, 3230 flow [2024-06-21 22:10:38,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2922, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3230, PETRI_PLACES=180, PETRI_TRANSITIONS=228} [2024-06-21 22:10:38,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 22:10:38,160 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 228 transitions, 3230 flow [2024-06-21 22:10:38,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:38,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:38,161 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 22:10:38,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 22:10:38,161 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:38,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:38,162 INFO L85 PathProgramCache]: Analyzing trace with hash 424630374, now seen corresponding path program 2 times [2024-06-21 22:10:38,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:38,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096154797] [2024-06-21 22:10:38,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:38,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:39,787 INFO 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 22:10:39,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:39,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096154797] [2024-06-21 22:10:39,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096154797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:39,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:39,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:10:39,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153170896] [2024-06-21 22:10:39,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:39,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:10:39,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:39,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:10:39,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:10:39,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:39,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 228 transitions, 3230 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:39,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:39,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:39,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:41,240 INFO L124 PetriNetUnfolderBase]: 2998/4985 cut-off events. [2024-06-21 22:10:41,240 INFO L125 PetriNetUnfolderBase]: For 148269/148269 co-relation queries the response was YES. [2024-06-21 22:10:41,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34076 conditions, 4985 events. 2998/4985 cut-off events. For 148269/148269 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 32132 event pairs, 691 based on Foata normal form. 2/4986 useless extension candidates. Maximal degree in co-relation 33996. Up to 4686 conditions per place. [2024-06-21 22:10:41,289 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 211 selfloop transitions, 35 changer transitions 0/251 dead transitions. [2024-06-21 22:10:41,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 251 transitions, 3916 flow [2024-06-21 22:10:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:10:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:10:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 22:10:41,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-21 22:10:41,291 INFO L175 Difference]: Start difference. First operand has 180 places, 228 transitions, 3230 flow. Second operand 6 states and 109 transitions. [2024-06-21 22:10:41,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 251 transitions, 3916 flow [2024-06-21 22:10:41,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 251 transitions, 3687 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 22:10:41,557 INFO L231 Difference]: Finished difference. Result has 180 places, 231 transitions, 3130 flow [2024-06-21 22:10:41,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3001, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3130, PETRI_PLACES=180, PETRI_TRANSITIONS=231} [2024-06-21 22:10:41,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-21 22:10:41,558 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 231 transitions, 3130 flow [2024-06-21 22:10:41,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:41,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:41,559 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 22:10:41,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 22:10:41,559 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:41,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:41,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1913402836, now seen corresponding path program 3 times [2024-06-21 22:10:41,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:41,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294360844] [2024-06-21 22:10:41,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:41,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:43,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:43,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294360844] [2024-06-21 22:10:43,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294360844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:43,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:43,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:10:43,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171614991] [2024-06-21 22:10:43,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:43,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:10:43,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:43,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:10:43,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:10:43,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:43,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 231 transitions, 3130 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:43,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:43,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:43,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:44,944 INFO L124 PetriNetUnfolderBase]: 2992/4970 cut-off events. [2024-06-21 22:10:44,944 INFO L125 PetriNetUnfolderBase]: For 147640/147640 co-relation queries the response was YES. [2024-06-21 22:10:44,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33494 conditions, 4970 events. 2992/4970 cut-off events. For 147640/147640 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31938 event pairs, 703 based on Foata normal form. 2/4969 useless extension candidates. Maximal degree in co-relation 33413. Up to 4681 conditions per place. [2024-06-21 22:10:44,994 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 204 selfloop transitions, 34 changer transitions 0/243 dead transitions. [2024-06-21 22:10:44,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 243 transitions, 3662 flow [2024-06-21 22:10:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:10:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:10:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 22:10:44,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-21 22:10:44,995 INFO L175 Difference]: Start difference. First operand has 180 places, 231 transitions, 3130 flow. Second operand 6 states and 101 transitions. [2024-06-21 22:10:44,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 243 transitions, 3662 flow [2024-06-21 22:10:45,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 243 transitions, 3563 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 22:10:45,219 INFO L231 Difference]: Finished difference. Result has 182 places, 231 transitions, 3105 flow [2024-06-21 22:10:45,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3031, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3105, PETRI_PLACES=182, PETRI_TRANSITIONS=231} [2024-06-21 22:10:45,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 22:10:45,220 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 231 transitions, 3105 flow [2024-06-21 22:10:45,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:45,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:45,220 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 22:10:45,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 22:10:45,221 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:45,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:45,221 INFO L85 PathProgramCache]: Analyzing trace with hash -678044922, now seen corresponding path program 1 times [2024-06-21 22:10:45,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:45,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161952695] [2024-06-21 22:10:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:45,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:47,263 INFO 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 22:10:47,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:47,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161952695] [2024-06-21 22:10:47,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161952695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:47,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:47,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:10:47,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819426092] [2024-06-21 22:10:47,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:47,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:10:47,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:47,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:10:47,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:10:47,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:10:47,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 231 transitions, 3105 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:47,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:47,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:10:47,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:48,438 INFO L124 PetriNetUnfolderBase]: 2928/4933 cut-off events. [2024-06-21 22:10:48,438 INFO L125 PetriNetUnfolderBase]: For 142999/143001 co-relation queries the response was YES. [2024-06-21 22:10:48,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32901 conditions, 4933 events. 2928/4933 cut-off events. For 142999/143001 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32555 event pairs, 1180 based on Foata normal form. 2/4911 useless extension candidates. Maximal degree in co-relation 32820. Up to 4661 conditions per place. [2024-06-21 22:10:48,480 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 227 selfloop transitions, 12 changer transitions 0/249 dead transitions. [2024-06-21 22:10:48,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 249 transitions, 3671 flow [2024-06-21 22:10:48,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:10:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:10:48,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 22:10:48,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 22:10:48,482 INFO L175 Difference]: Start difference. First operand has 182 places, 231 transitions, 3105 flow. Second operand 6 states and 106 transitions. [2024-06-21 22:10:48,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 249 transitions, 3671 flow [2024-06-21 22:10:48,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 249 transitions, 3596 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 22:10:48,663 INFO L231 Difference]: Finished difference. Result has 184 places, 234 transitions, 3102 flow [2024-06-21 22:10:48,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3102, PETRI_PLACES=184, PETRI_TRANSITIONS=234} [2024-06-21 22:10:48,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 22:10:48,664 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 234 transitions, 3102 flow [2024-06-21 22:10:48,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:48,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:48,665 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 22:10:48,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 22:10:48,665 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:48,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:48,665 INFO L85 PathProgramCache]: Analyzing trace with hash 106474393, now seen corresponding path program 1 times [2024-06-21 22:10:48,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:48,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131340753] [2024-06-21 22:10:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:48,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:50,693 INFO 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 22:10:50,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:50,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131340753] [2024-06-21 22:10:50,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131340753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:50,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:50,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:10:50,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406971582] [2024-06-21 22:10:50,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:50,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:10:50,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:10:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:10:50,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:50,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 234 transitions, 3102 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:10:50,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:50,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:50,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:52,386 INFO L124 PetriNetUnfolderBase]: 3027/5034 cut-off events. [2024-06-21 22:10:52,386 INFO L125 PetriNetUnfolderBase]: For 152594/152594 co-relation queries the response was YES. [2024-06-21 22:10:52,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34049 conditions, 5034 events. 3027/5034 cut-off events. For 152594/152594 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32481 event pairs, 687 based on Foata normal form. 4/5037 useless extension candidates. Maximal degree in co-relation 33967. Up to 4676 conditions per place. [2024-06-21 22:10:52,428 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 218 selfloop transitions, 42 changer transitions 0/265 dead transitions. [2024-06-21 22:10:52,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 265 transitions, 3888 flow [2024-06-21 22:10:52,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:10:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:10:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-21 22:10:52,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-21 22:10:52,430 INFO L175 Difference]: Start difference. First operand has 184 places, 234 transitions, 3102 flow. Second operand 7 states and 127 transitions. [2024-06-21 22:10:52,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 265 transitions, 3888 flow [2024-06-21 22:10:52,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 265 transitions, 3838 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 22:10:52,602 INFO L231 Difference]: Finished difference. Result has 187 places, 240 transitions, 3241 flow [2024-06-21 22:10:52,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3052, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3241, PETRI_PLACES=187, PETRI_TRANSITIONS=240} [2024-06-21 22:10:52,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 22:10:52,603 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 240 transitions, 3241 flow [2024-06-21 22:10:52,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:10:52,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:52,603 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 22:10:52,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 22:10:52,603 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:52,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:52,604 INFO L85 PathProgramCache]: Analyzing trace with hash -304951242, now seen corresponding path program 2 times [2024-06-21 22:10:52,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:52,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811662540] [2024-06-21 22:10:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:52,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:10:54,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:54,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811662540] [2024-06-21 22:10:54,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811662540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:54,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:54,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 22:10:54,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697024502] [2024-06-21 22:10:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:54,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 22:10:54,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 22:10:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 22:10:54,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:10:54,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 240 transitions, 3241 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:54,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:54,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:10:54,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:55,649 INFO L124 PetriNetUnfolderBase]: 2941/4959 cut-off events. [2024-06-21 22:10:55,649 INFO L125 PetriNetUnfolderBase]: For 151110/151110 co-relation queries the response was YES. [2024-06-21 22:10:55,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33757 conditions, 4959 events. 2941/4959 cut-off events. For 151110/151110 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 32778 event pairs, 1172 based on Foata normal form. 3/4938 useless extension candidates. Maximal degree in co-relation 33674. Up to 4684 conditions per place. [2024-06-21 22:10:55,691 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 233 selfloop transitions, 14 changer transitions 0/257 dead transitions. [2024-06-21 22:10:55,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 257 transitions, 3831 flow [2024-06-21 22:10:55,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 22:10:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 22:10:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 22:10:55,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:10:55,692 INFO L175 Difference]: Start difference. First operand has 187 places, 240 transitions, 3241 flow. Second operand 6 states and 102 transitions. [2024-06-21 22:10:55,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 257 transitions, 3831 flow [2024-06-21 22:10:55,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 257 transitions, 3767 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 22:10:55,892 INFO L231 Difference]: Finished difference. Result has 191 places, 246 transitions, 3292 flow [2024-06-21 22:10:55,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3179, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3292, PETRI_PLACES=191, PETRI_TRANSITIONS=246} [2024-06-21 22:10:55,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 22:10:55,893 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 246 transitions, 3292 flow [2024-06-21 22:10:55,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:55,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:10:55,893 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 22:10:55,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 22:10:55,894 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:10:55,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:10:55,894 INFO L85 PathProgramCache]: Analyzing trace with hash 444305677, now seen corresponding path program 1 times [2024-06-21 22:10:55,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:10:55,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817124921] [2024-06-21 22:10:55,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:10:55,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:10:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:10:58,119 INFO 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 22:10:58,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:10:58,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817124921] [2024-06-21 22:10:58,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817124921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:10:58,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:10:58,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:10:58,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056267105] [2024-06-21 22:10:58,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:10:58,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:10:58,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:10:58,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:10:58,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:10:58,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:10:58,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 246 transitions, 3292 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:10:58,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:10:58,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:10:58,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:10:59,725 INFO L124 PetriNetUnfolderBase]: 3108/5187 cut-off events. [2024-06-21 22:10:59,726 INFO L125 PetriNetUnfolderBase]: For 175530/175530 co-relation queries the response was YES. [2024-06-21 22:10:59,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35894 conditions, 5187 events. 3108/5187 cut-off events. For 175530/175530 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33902 event pairs, 755 based on Foata normal form. 12/5199 useless extension candidates. Maximal degree in co-relation 35808. Up to 4664 conditions per place. [2024-06-21 22:10:59,777 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 256 selfloop transitions, 37 changer transitions 0/298 dead transitions. [2024-06-21 22:10:59,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 298 transitions, 4137 flow [2024-06-21 22:10:59,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:10:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:10:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 22:10:59,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:10:59,779 INFO L175 Difference]: Start difference. First operand has 191 places, 246 transitions, 3292 flow. Second operand 10 states and 180 transitions. [2024-06-21 22:10:59,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 298 transitions, 4137 flow [2024-06-21 22:11:00,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 298 transitions, 4082 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 22:11:00,013 INFO L231 Difference]: Finished difference. Result has 198 places, 248 transitions, 3407 flow [2024-06-21 22:11:00,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3237, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3407, PETRI_PLACES=198, PETRI_TRANSITIONS=248} [2024-06-21 22:11:00,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 22:11:00,014 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 248 transitions, 3407 flow [2024-06-21 22:11:00,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:00,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:00,014 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 22:11:00,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 22:11:00,014 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:00,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:00,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1695307053, now seen corresponding path program 2 times [2024-06-21 22:11:00,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:00,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668193562] [2024-06-21 22:11:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:00,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:02,485 INFO 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 22:11:02,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:02,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668193562] [2024-06-21 22:11:02,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668193562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:02,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:02,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:02,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665236979] [2024-06-21 22:11:02,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:02,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:02,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:02,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:02,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:02,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:02,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 248 transitions, 3407 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:02,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:02,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:02,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:04,050 INFO L124 PetriNetUnfolderBase]: 3156/5273 cut-off events. [2024-06-21 22:11:04,051 INFO L125 PetriNetUnfolderBase]: For 183912/183912 co-relation queries the response was YES. [2024-06-21 22:11:04,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36809 conditions, 5273 events. 3156/5273 cut-off events. For 183912/183912 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34507 event pairs, 895 based on Foata normal form. 12/5285 useless extension candidates. Maximal degree in co-relation 36722. Up to 4866 conditions per place. [2024-06-21 22:11:04,106 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 256 selfloop transitions, 35 changer transitions 0/296 dead transitions. [2024-06-21 22:11:04,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 296 transitions, 4225 flow [2024-06-21 22:11:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:11:04,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:11:04,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 22:11:04,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 22:11:04,107 INFO L175 Difference]: Start difference. First operand has 198 places, 248 transitions, 3407 flow. Second operand 10 states and 178 transitions. [2024-06-21 22:11:04,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 296 transitions, 4225 flow [2024-06-21 22:11:04,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 296 transitions, 4111 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 22:11:04,354 INFO L231 Difference]: Finished difference. Result has 200 places, 249 transitions, 3436 flow [2024-06-21 22:11:04,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3293, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3436, PETRI_PLACES=200, PETRI_TRANSITIONS=249} [2024-06-21 22:11:04,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-21 22:11:04,355 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 249 transitions, 3436 flow [2024-06-21 22:11:04,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:04,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:04,355 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 22:11:04,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 22:11:04,355 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:04,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:04,356 INFO L85 PathProgramCache]: Analyzing trace with hash -711181103, now seen corresponding path program 3 times [2024-06-21 22:11:04,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:04,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630495276] [2024-06-21 22:11:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:04,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:06,389 INFO 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 22:11:06,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:06,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630495276] [2024-06-21 22:11:06,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630495276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:06,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:06,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:06,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777085191] [2024-06-21 22:11:06,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:06,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:06,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:06,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:06,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:06,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 249 transitions, 3436 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:06,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:06,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:06,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:08,196 INFO L124 PetriNetUnfolderBase]: 3238/5413 cut-off events. [2024-06-21 22:11:08,196 INFO L125 PetriNetUnfolderBase]: For 198370/198370 co-relation queries the response was YES. [2024-06-21 22:11:08,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37964 conditions, 5413 events. 3238/5413 cut-off events. For 198370/198370 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 35618 event pairs, 877 based on Foata normal form. 12/5425 useless extension candidates. Maximal degree in co-relation 37876. Up to 4936 conditions per place. [2024-06-21 22:11:08,250 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 252 selfloop transitions, 43 changer transitions 0/300 dead transitions. [2024-06-21 22:11:08,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 300 transitions, 4343 flow [2024-06-21 22:11:08,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:11:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:11:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 22:11:08,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:11:08,252 INFO L175 Difference]: Start difference. First operand has 200 places, 249 transitions, 3436 flow. Second operand 10 states and 180 transitions. [2024-06-21 22:11:08,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 300 transitions, 4343 flow [2024-06-21 22:11:08,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 300 transitions, 4183 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-21 22:11:08,554 INFO L231 Difference]: Finished difference. Result has 202 places, 251 transitions, 3507 flow [2024-06-21 22:11:08,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3323, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3507, PETRI_PLACES=202, PETRI_TRANSITIONS=251} [2024-06-21 22:11:08,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-21 22:11:08,555 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 251 transitions, 3507 flow [2024-06-21 22:11:08,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:08,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:08,556 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 22:11:08,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 22:11:08,556 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:08,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:08,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1137379247, now seen corresponding path program 4 times [2024-06-21 22:11:08,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:08,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428216714] [2024-06-21 22:11:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:08,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:10,437 INFO 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 22:11:10,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:10,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428216714] [2024-06-21 22:11:10,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428216714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:10,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:10,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:10,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061823685] [2024-06-21 22:11:10,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:10,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:10,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:10,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:10,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:10,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:10,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 251 transitions, 3507 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:10,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:10,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:10,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:12,176 INFO L124 PetriNetUnfolderBase]: 3354/5609 cut-off events. [2024-06-21 22:11:12,176 INFO L125 PetriNetUnfolderBase]: For 202409/202409 co-relation queries the response was YES. [2024-06-21 22:11:12,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38980 conditions, 5609 events. 3354/5609 cut-off events. For 202409/202409 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 36831 event pairs, 713 based on Foata normal form. 12/5621 useless extension candidates. Maximal degree in co-relation 38891. Up to 4918 conditions per place. [2024-06-21 22:11:12,224 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 248 selfloop transitions, 52 changer transitions 0/305 dead transitions. [2024-06-21 22:11:12,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 305 transitions, 4409 flow [2024-06-21 22:11:12,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:11:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:11:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 22:11:12,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:11:12,226 INFO L175 Difference]: Start difference. First operand has 202 places, 251 transitions, 3507 flow. Second operand 10 states and 180 transitions. [2024-06-21 22:11:12,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 305 transitions, 4409 flow [2024-06-21 22:11:12,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 305 transitions, 4281 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 22:11:12,478 INFO L231 Difference]: Finished difference. Result has 204 places, 254 transitions, 3612 flow [2024-06-21 22:11:12,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3379, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3612, PETRI_PLACES=204, PETRI_TRANSITIONS=254} [2024-06-21 22:11:12,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 22:11:12,478 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 254 transitions, 3612 flow [2024-06-21 22:11:12,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:12,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:12,479 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 22:11:12,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 22:11:12,479 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:12,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:12,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1646849275, now seen corresponding path program 5 times [2024-06-21 22:11:12,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:12,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056139723] [2024-06-21 22:11:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:12,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:14,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:14,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056139723] [2024-06-21 22:11:14,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056139723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:14,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:14,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:14,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813600842] [2024-06-21 22:11:14,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:14,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:14,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:14,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:14,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:14,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:14,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 254 transitions, 3612 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:14,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:14,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:14,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:16,751 INFO L124 PetriNetUnfolderBase]: 3402/5689 cut-off events. [2024-06-21 22:11:16,751 INFO L125 PetriNetUnfolderBase]: For 210829/210829 co-relation queries the response was YES. [2024-06-21 22:11:16,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39742 conditions, 5689 events. 3402/5689 cut-off events. For 210829/210829 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 37389 event pairs, 671 based on Foata normal form. 12/5701 useless extension candidates. Maximal degree in co-relation 39652. Up to 4594 conditions per place. [2024-06-21 22:11:16,801 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 60 changer transitions 0/299 dead transitions. [2024-06-21 22:11:16,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 299 transitions, 4440 flow [2024-06-21 22:11:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:11:16,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:11:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 22:11:16,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:11:16,803 INFO L175 Difference]: Start difference. First operand has 204 places, 254 transitions, 3612 flow. Second operand 9 states and 162 transitions. [2024-06-21 22:11:16,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 299 transitions, 4440 flow [2024-06-21 22:11:17,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 299 transitions, 4293 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 22:11:17,117 INFO L231 Difference]: Finished difference. Result has 205 places, 255 transitions, 3672 flow [2024-06-21 22:11:17,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3465, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3672, PETRI_PLACES=205, PETRI_TRANSITIONS=255} [2024-06-21 22:11:17,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 22:11:17,118 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 255 transitions, 3672 flow [2024-06-21 22:11:17,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:17,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:17,118 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 22:11:17,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 22:11:17,119 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:17,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:17,121 INFO L85 PathProgramCache]: Analyzing trace with hash -765284663, now seen corresponding path program 6 times [2024-06-21 22:11:17,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:17,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880518401] [2024-06-21 22:11:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:17,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:19,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880518401] [2024-06-21 22:11:19,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880518401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:19,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:19,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:11:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295513839] [2024-06-21 22:11:19,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:11:19,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:19,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:11:19,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:11:19,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:19,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 255 transitions, 3672 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:19,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:19,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:19,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:21,701 INFO L124 PetriNetUnfolderBase]: 3382/5665 cut-off events. [2024-06-21 22:11:21,701 INFO L125 PetriNetUnfolderBase]: For 203397/203397 co-relation queries the response was YES. [2024-06-21 22:11:21,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39049 conditions, 5665 events. 3382/5665 cut-off events. For 203397/203397 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 37662 event pairs, 923 based on Foata normal form. 12/5677 useless extension candidates. Maximal degree in co-relation 38958. Up to 4954 conditions per place. [2024-06-21 22:11:21,754 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 52 changer transitions 0/297 dead transitions. [2024-06-21 22:11:21,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 297 transitions, 4350 flow [2024-06-21 22:11:21,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:11:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:11:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 22:11:21,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 22:11:21,756 INFO L175 Difference]: Start difference. First operand has 205 places, 255 transitions, 3672 flow. Second operand 9 states and 161 transitions. [2024-06-21 22:11:21,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 297 transitions, 4350 flow [2024-06-21 22:11:22,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 297 transitions, 4185 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 22:11:22,107 INFO L231 Difference]: Finished difference. Result has 206 places, 254 transitions, 3547 flow [2024-06-21 22:11:22,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3433, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3547, PETRI_PLACES=206, PETRI_TRANSITIONS=254} [2024-06-21 22:11:22,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 22:11:22,107 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 254 transitions, 3547 flow [2024-06-21 22:11:22,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:22,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:22,108 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 22:11:22,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 22:11:22,108 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:22,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:22,108 INFO L85 PathProgramCache]: Analyzing trace with hash 461153143, now seen corresponding path program 2 times [2024-06-21 22:11:22,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:22,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318415556] [2024-06-21 22:11:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:22,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:24,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:24,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318415556] [2024-06-21 22:11:24,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318415556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:24,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:24,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:24,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132201180] [2024-06-21 22:11:24,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:24,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:24,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:24,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:24,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:24,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:24,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 254 transitions, 3547 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:24,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:24,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:24,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:26,091 INFO L124 PetriNetUnfolderBase]: 3402/5696 cut-off events. [2024-06-21 22:11:26,091 INFO L125 PetriNetUnfolderBase]: For 191214/191214 co-relation queries the response was YES. [2024-06-21 22:11:26,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38815 conditions, 5696 events. 3402/5696 cut-off events. For 191214/191214 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 38111 event pairs, 1533 based on Foata normal form. 4/5700 useless extension candidates. Maximal degree in co-relation 38723. Up to 5460 conditions per place. [2024-06-21 22:11:26,140 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 248 selfloop transitions, 17 changer transitions 0/270 dead transitions. [2024-06-21 22:11:26,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 270 transitions, 4179 flow [2024-06-21 22:11:26,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:11:26,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:11:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 22:11:26,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-21 22:11:26,141 INFO L175 Difference]: Start difference. First operand has 206 places, 254 transitions, 3547 flow. Second operand 7 states and 110 transitions. [2024-06-21 22:11:26,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 270 transitions, 4179 flow [2024-06-21 22:11:26,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 270 transitions, 3931 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-21 22:11:26,421 INFO L231 Difference]: Finished difference. Result has 204 places, 257 transitions, 3398 flow [2024-06-21 22:11:26,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3299, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3398, PETRI_PLACES=204, PETRI_TRANSITIONS=257} [2024-06-21 22:11:26,422 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 22:11:26,422 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 257 transitions, 3398 flow [2024-06-21 22:11:26,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:26,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:26,422 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 22:11:26,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 22:11:26,422 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:26,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:26,423 INFO L85 PathProgramCache]: Analyzing trace with hash 460737433, now seen corresponding path program 3 times [2024-06-21 22:11:26,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:26,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285523710] [2024-06-21 22:11:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:26,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:28,404 INFO 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 22:11:28,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:28,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285523710] [2024-06-21 22:11:28,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285523710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:28,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:28,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:11:28,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431375078] [2024-06-21 22:11:28,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:28,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:11:28,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:11:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:11:28,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:28,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 257 transitions, 3398 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:11:28,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:28,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:28,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:30,068 INFO L124 PetriNetUnfolderBase]: 3390/5656 cut-off events. [2024-06-21 22:11:30,069 INFO L125 PetriNetUnfolderBase]: For 174654/174654 co-relation queries the response was YES. [2024-06-21 22:11:30,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37438 conditions, 5656 events. 3390/5656 cut-off events. For 174654/174654 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 37417 event pairs, 880 based on Foata normal form. 4/5657 useless extension candidates. Maximal degree in co-relation 37347. Up to 5303 conditions per place. [2024-06-21 22:11:30,126 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 224 selfloop transitions, 45 changer transitions 0/274 dead transitions. [2024-06-21 22:11:30,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 274 transitions, 4018 flow [2024-06-21 22:11:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:11:30,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:11:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 22:11:30,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 22:11:30,127 INFO L175 Difference]: Start difference. First operand has 204 places, 257 transitions, 3398 flow. Second operand 7 states and 118 transitions. [2024-06-21 22:11:30,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 274 transitions, 4018 flow [2024-06-21 22:11:30,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 274 transitions, 3884 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 22:11:30,393 INFO L231 Difference]: Finished difference. Result has 204 places, 257 transitions, 3360 flow [2024-06-21 22:11:30,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3264, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3360, PETRI_PLACES=204, PETRI_TRANSITIONS=257} [2024-06-21 22:11:30,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-21 22:11:30,394 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 257 transitions, 3360 flow [2024-06-21 22:11:30,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:11:30,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:30,394 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 22:11:30,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 22:11:30,394 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:30,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:30,395 INFO L85 PathProgramCache]: Analyzing trace with hash 313252732, now seen corresponding path program 1 times [2024-06-21 22:11:30,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:30,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136031203] [2024-06-21 22:11:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:30,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:32,414 INFO 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 22:11:32,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:32,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136031203] [2024-06-21 22:11:32,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136031203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:32,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:32,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:11:32,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483517587] [2024-06-21 22:11:32,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:32,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:11:32,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:32,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:11:32,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:11:32,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:11:32,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 257 transitions, 3360 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:32,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:32,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:11:32,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:34,024 INFO L124 PetriNetUnfolderBase]: 3344/5638 cut-off events. [2024-06-21 22:11:34,025 INFO L125 PetriNetUnfolderBase]: For 170644/170645 co-relation queries the response was YES. [2024-06-21 22:11:34,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37107 conditions, 5638 events. 3344/5638 cut-off events. For 170644/170645 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 38122 event pairs, 1466 based on Foata normal form. 3/5614 useless extension candidates. Maximal degree in co-relation 37017. Up to 5321 conditions per place. [2024-06-21 22:11:34,075 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 250 selfloop transitions, 30 changer transitions 0/290 dead transitions. [2024-06-21 22:11:34,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 290 transitions, 4308 flow [2024-06-21 22:11:34,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:11:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:11:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 22:11:34,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 22:11:34,076 INFO L175 Difference]: Start difference. First operand has 204 places, 257 transitions, 3360 flow. Second operand 7 states and 130 transitions. [2024-06-21 22:11:34,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 290 transitions, 4308 flow [2024-06-21 22:11:34,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 290 transitions, 4177 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:11:34,339 INFO L231 Difference]: Finished difference. Result has 206 places, 266 transitions, 3454 flow [2024-06-21 22:11:34,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3454, PETRI_PLACES=206, PETRI_TRANSITIONS=266} [2024-06-21 22:11:34,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 22:11:34,339 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 266 transitions, 3454 flow [2024-06-21 22:11:34,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:34,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:34,340 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 22:11:34,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 22:11:34,340 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:34,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:34,340 INFO L85 PathProgramCache]: Analyzing trace with hash 313342942, now seen corresponding path program 2 times [2024-06-21 22:11:34,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:34,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051689363] [2024-06-21 22:11:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:34,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:37,204 INFO 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 22:11:37,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:37,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051689363] [2024-06-21 22:11:37,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051689363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:37,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:37,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:11:37,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021520569] [2024-06-21 22:11:37,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:37,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:11:37,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:37,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:11:37,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:11:37,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:11:37,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 266 transitions, 3454 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:37,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:37,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:11:37,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:38,709 INFO L124 PetriNetUnfolderBase]: 3325/5617 cut-off events. [2024-06-21 22:11:38,709 INFO L125 PetriNetUnfolderBase]: For 175096/175097 co-relation queries the response was YES. [2024-06-21 22:11:38,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37384 conditions, 5617 events. 3325/5617 cut-off events. For 175096/175097 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 38009 event pairs, 1462 based on Foata normal form. 3/5596 useless extension candidates. Maximal degree in co-relation 37292. Up to 5335 conditions per place. [2024-06-21 22:11:38,759 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 15 changer transitions 0/286 dead transitions. [2024-06-21 22:11:38,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 286 transitions, 4116 flow [2024-06-21 22:11:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:11:38,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:11:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 22:11:38,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:11:38,761 INFO L175 Difference]: Start difference. First operand has 206 places, 266 transitions, 3454 flow. Second operand 7 states and 119 transitions. [2024-06-21 22:11:38,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 286 transitions, 4116 flow [2024-06-21 22:11:39,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 286 transitions, 4061 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 22:11:39,030 INFO L231 Difference]: Finished difference. Result has 211 places, 269 transitions, 3491 flow [2024-06-21 22:11:39,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3399, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3491, PETRI_PLACES=211, PETRI_TRANSITIONS=269} [2024-06-21 22:11:39,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-21 22:11:39,031 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 269 transitions, 3491 flow [2024-06-21 22:11:39,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:39,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:39,032 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 22:11:39,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 22:11:39,032 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:39,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1258580456, now seen corresponding path program 3 times [2024-06-21 22:11:39,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:39,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527706833] [2024-06-21 22:11:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:39,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:42,384 INFO 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 22:11:42,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:42,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527706833] [2024-06-21 22:11:42,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527706833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:42,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:42,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:11:42,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999002474] [2024-06-21 22:11:42,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:42,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:11:42,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:42,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:11:42,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:11:42,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:11:42,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 269 transitions, 3491 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:42,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:42,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:11:42,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:43,990 INFO L124 PetriNetUnfolderBase]: 3316/5605 cut-off events. [2024-06-21 22:11:43,991 INFO L125 PetriNetUnfolderBase]: For 179922/179923 co-relation queries the response was YES. [2024-06-21 22:11:44,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37698 conditions, 5605 events. 3316/5605 cut-off events. For 179922/179923 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 37900 event pairs, 1461 based on Foata normal form. 4/5583 useless extension candidates. Maximal degree in co-relation 37604. Up to 5321 conditions per place. [2024-06-21 22:11:44,046 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 250 selfloop transitions, 22 changer transitions 0/282 dead transitions. [2024-06-21 22:11:44,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 282 transitions, 4077 flow [2024-06-21 22:11:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:11:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:11:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 22:11:44,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-21 22:11:44,047 INFO L175 Difference]: Start difference. First operand has 211 places, 269 transitions, 3491 flow. Second operand 7 states and 117 transitions. [2024-06-21 22:11:44,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 282 transitions, 4077 flow [2024-06-21 22:11:44,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 282 transitions, 3945 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 22:11:44,346 INFO L231 Difference]: Finished difference. Result has 214 places, 269 transitions, 3421 flow [2024-06-21 22:11:44,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3359, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3421, PETRI_PLACES=214, PETRI_TRANSITIONS=269} [2024-06-21 22:11:44,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 22:11:44,346 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 269 transitions, 3421 flow [2024-06-21 22:11:44,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:44,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:44,347 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 22:11:44,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 22:11:44,347 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:44,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:44,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1258364975, now seen corresponding path program 1 times [2024-06-21 22:11:44,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:44,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216643317] [2024-06-21 22:11:44,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:44,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:11:47,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:47,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216643317] [2024-06-21 22:11:47,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216643317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:47,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:47,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:47,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197929436] [2024-06-21 22:11:47,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:47,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:47,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:47,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:47,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:47,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:47,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 269 transitions, 3421 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:47,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:47,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:47,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:49,619 INFO L124 PetriNetUnfolderBase]: 3403/5698 cut-off events. [2024-06-21 22:11:49,619 INFO L125 PetriNetUnfolderBase]: For 198416/198416 co-relation queries the response was YES. [2024-06-21 22:11:49,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38561 conditions, 5698 events. 3403/5698 cut-off events. For 198416/198416 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 38084 event pairs, 1533 based on Foata normal form. 2/5699 useless extension candidates. Maximal degree in co-relation 38465. Up to 5473 conditions per place. [2024-06-21 22:11:49,676 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 262 selfloop transitions, 16 changer transitions 0/283 dead transitions. [2024-06-21 22:11:49,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 283 transitions, 4047 flow [2024-06-21 22:11:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:11:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:11:49,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-21 22:11:49,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-21 22:11:49,678 INFO L175 Difference]: Start difference. First operand has 214 places, 269 transitions, 3421 flow. Second operand 7 states and 108 transitions. [2024-06-21 22:11:49,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 283 transitions, 4047 flow [2024-06-21 22:11:49,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 283 transitions, 3985 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 22:11:49,966 INFO L231 Difference]: Finished difference. Result has 215 places, 271 transitions, 3434 flow [2024-06-21 22:11:49,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3359, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3434, PETRI_PLACES=215, PETRI_TRANSITIONS=271} [2024-06-21 22:11:49,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-21 22:11:49,966 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 271 transitions, 3434 flow [2024-06-21 22:11:49,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:49,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:49,967 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 22:11:49,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 22:11:49,967 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:49,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:49,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1135932867, now seen corresponding path program 1 times [2024-06-21 22:11:49,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:49,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874206197] [2024-06-21 22:11:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:49,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:52,215 INFO 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 22:11:52,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:52,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874206197] [2024-06-21 22:11:52,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874206197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:52,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:52,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:11:52,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878605065] [2024-06-21 22:11:52,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:52,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:11:52,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:52,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:11:52,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:11:52,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:52,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 271 transitions, 3434 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:52,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:52,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:52,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:53,833 INFO L124 PetriNetUnfolderBase]: 3413/5705 cut-off events. [2024-06-21 22:11:53,834 INFO L125 PetriNetUnfolderBase]: For 200900/200900 co-relation queries the response was YES. [2024-06-21 22:11:53,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38815 conditions, 5705 events. 3413/5705 cut-off events. For 200900/200900 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 37895 event pairs, 1095 based on Foata normal form. 2/5707 useless extension candidates. Maximal degree in co-relation 38718. Up to 5427 conditions per place. [2024-06-21 22:11:53,887 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 266 selfloop transitions, 32 changer transitions 0/303 dead transitions. [2024-06-21 22:11:53,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 303 transitions, 4196 flow [2024-06-21 22:11:53,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:11:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:11:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:11:53,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 22:11:53,888 INFO L175 Difference]: Start difference. First operand has 215 places, 271 transitions, 3434 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:11:53,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 303 transitions, 4196 flow [2024-06-21 22:11:54,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 303 transitions, 4137 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 22:11:54,232 INFO L231 Difference]: Finished difference. Result has 218 places, 275 transitions, 3529 flow [2024-06-21 22:11:54,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3375, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3529, PETRI_PLACES=218, PETRI_TRANSITIONS=275} [2024-06-21 22:11:54,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-21 22:11:54,233 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 275 transitions, 3529 flow [2024-06-21 22:11:54,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:11:54,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:54,233 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 22:11:54,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 22:11:54,233 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:54,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:54,234 INFO L85 PathProgramCache]: Analyzing trace with hash 97830313, now seen corresponding path program 2 times [2024-06-21 22:11:54,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:54,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280872580] [2024-06-21 22:11:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:54,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:11:56,052 INFO 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 22:11:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:11:56,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280872580] [2024-06-21 22:11:56,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280872580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:11:56,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:11:56,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:11:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992044610] [2024-06-21 22:11:56,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:11:56,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:11:56,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:11:56,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:11:56,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:11:56,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:11:56,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 275 transitions, 3529 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:11:56,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:11:56,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:11:56,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:11:57,589 INFO L124 PetriNetUnfolderBase]: 3423/5713 cut-off events. [2024-06-21 22:11:57,589 INFO L125 PetriNetUnfolderBase]: For 209665/209665 co-relation queries the response was YES. [2024-06-21 22:11:57,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39560 conditions, 5713 events. 3423/5713 cut-off events. For 209665/209665 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 37854 event pairs, 870 based on Foata normal form. 2/5715 useless extension candidates. Maximal degree in co-relation 39462. Up to 5400 conditions per place. [2024-06-21 22:11:57,646 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 260 selfloop transitions, 40 changer transitions 0/305 dead transitions. [2024-06-21 22:11:57,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 305 transitions, 4313 flow [2024-06-21 22:11:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:11:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:11:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:11:57,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 22:11:57,648 INFO L175 Difference]: Start difference. First operand has 218 places, 275 transitions, 3529 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:11:57,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 305 transitions, 4313 flow [2024-06-21 22:11:57,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 305 transitions, 4193 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 22:11:57,999 INFO L231 Difference]: Finished difference. Result has 220 places, 278 transitions, 3567 flow [2024-06-21 22:11:58,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3409, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3567, PETRI_PLACES=220, PETRI_TRANSITIONS=278} [2024-06-21 22:11:58,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-21 22:11:58,000 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 278 transitions, 3567 flow [2024-06-21 22:11:58,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:11:58,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:11:58,000 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 22:11:58,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 22:11:58,001 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:11:58,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:11:58,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1545594291, now seen corresponding path program 3 times [2024-06-21 22:11:58,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:11:58,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67738050] [2024-06-21 22:11:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:11:58,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:11:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:00,323 INFO 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 22:12:00,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:00,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67738050] [2024-06-21 22:12:00,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67738050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:00,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:00,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:12:00,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813759822] [2024-06-21 22:12:00,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:00,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:12:00,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:00,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:12:00,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:12:00,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:00,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 278 transitions, 3567 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:12:00,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:00,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:00,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:01,906 INFO L124 PetriNetUnfolderBase]: 3433/5737 cut-off events. [2024-06-21 22:12:01,907 INFO L125 PetriNetUnfolderBase]: For 218830/218830 co-relation queries the response was YES. [2024-06-21 22:12:01,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40179 conditions, 5737 events. 3433/5737 cut-off events. For 218830/218830 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 38094 event pairs, 1089 based on Foata normal form. 2/5739 useless extension candidates. Maximal degree in co-relation 40080. Up to 5427 conditions per place. [2024-06-21 22:12:01,971 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 260 selfloop transitions, 39 changer transitions 0/304 dead transitions. [2024-06-21 22:12:01,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 304 transitions, 4329 flow [2024-06-21 22:12:01,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:12:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:12:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 22:12:01,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 22:12:01,973 INFO L175 Difference]: Start difference. First operand has 220 places, 278 transitions, 3567 flow. Second operand 7 states and 121 transitions. [2024-06-21 22:12:01,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 304 transitions, 4329 flow [2024-06-21 22:12:02,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 304 transitions, 4201 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 22:12:02,336 INFO L231 Difference]: Finished difference. Result has 221 places, 282 transitions, 3627 flow [2024-06-21 22:12:02,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3439, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3627, PETRI_PLACES=221, PETRI_TRANSITIONS=282} [2024-06-21 22:12:02,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 22:12:02,337 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 282 transitions, 3627 flow [2024-06-21 22:12:02,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:12:02,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:02,337 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 22:12:02,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 22:12:02,337 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:12:02,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:02,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1550355891, now seen corresponding path program 4 times [2024-06-21 22:12:02,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:02,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558756478] [2024-06-21 22:12:02,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:02,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:04,279 INFO 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 22:12:04,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:04,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558756478] [2024-06-21 22:12:04,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558756478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:04,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:04,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:12:04,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391988464] [2024-06-21 22:12:04,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:04,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:12:04,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:04,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:12:04,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:12:04,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:04,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 282 transitions, 3627 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:12:04,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:04,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:04,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:05,982 INFO L124 PetriNetUnfolderBase]: 3443/5744 cut-off events. [2024-06-21 22:12:05,982 INFO L125 PetriNetUnfolderBase]: For 228245/228245 co-relation queries the response was YES. [2024-06-21 22:12:06,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40873 conditions, 5744 events. 3443/5744 cut-off events. For 228245/228245 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 38057 event pairs, 872 based on Foata normal form. 2/5745 useless extension candidates. Maximal degree in co-relation 40773. Up to 5420 conditions per place. [2024-06-21 22:12:06,040 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 260 selfloop transitions, 41 changer transitions 0/306 dead transitions. [2024-06-21 22:12:06,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 306 transitions, 4415 flow [2024-06-21 22:12:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:12:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:12:06,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 22:12:06,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 22:12:06,042 INFO L175 Difference]: Start difference. First operand has 221 places, 282 transitions, 3627 flow. Second operand 7 states and 120 transitions. [2024-06-21 22:12:06,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 306 transitions, 4415 flow [2024-06-21 22:12:06,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 306 transitions, 4281 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-21 22:12:06,427 INFO L231 Difference]: Finished difference. Result has 223 places, 285 transitions, 3669 flow [2024-06-21 22:12:06,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3493, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3669, PETRI_PLACES=223, PETRI_TRANSITIONS=285} [2024-06-21 22:12:06,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 22:12:06,427 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 285 transitions, 3669 flow [2024-06-21 22:12:06,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:12:06,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:06,428 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 22:12:06,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 22:12:06,428 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:12:06,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:06,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1123303877, now seen corresponding path program 5 times [2024-06-21 22:12:06,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:06,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474206054] [2024-06-21 22:12:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:06,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:08,928 INFO 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 22:12:08,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:08,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474206054] [2024-06-21 22:12:08,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474206054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:08,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:08,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:12:08,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630407091] [2024-06-21 22:12:08,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:08,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:12:08,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:08,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:12:08,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:12:08,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:08,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 285 transitions, 3669 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:12:08,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:08,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:08,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:10,423 INFO L124 PetriNetUnfolderBase]: 3453/5769 cut-off events. [2024-06-21 22:12:10,431 INFO L125 PetriNetUnfolderBase]: For 238619/238619 co-relation queries the response was YES. [2024-06-21 22:12:10,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41497 conditions, 5769 events. 3453/5769 cut-off events. For 238619/238619 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 38392 event pairs, 1100 based on Foata normal form. 2/5770 useless extension candidates. Maximal degree in co-relation 41396. Up to 5432 conditions per place. [2024-06-21 22:12:10,485 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 262 selfloop transitions, 41 changer transitions 0/308 dead transitions. [2024-06-21 22:12:10,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 308 transitions, 4445 flow [2024-06-21 22:12:10,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:12:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:12:10,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 22:12:10,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 22:12:10,487 INFO L175 Difference]: Start difference. First operand has 223 places, 285 transitions, 3669 flow. Second operand 7 states and 120 transitions. [2024-06-21 22:12:10,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 308 transitions, 4445 flow [2024-06-21 22:12:10,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 308 transitions, 4305 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 22:12:10,882 INFO L231 Difference]: Finished difference. Result has 225 places, 289 transitions, 3727 flow [2024-06-21 22:12:10,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3535, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3727, PETRI_PLACES=225, PETRI_TRANSITIONS=289} [2024-06-21 22:12:10,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-21 22:12:10,883 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 289 transitions, 3727 flow [2024-06-21 22:12:10,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:12:10,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:10,883 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 22:12:10,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 22:12:10,883 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:12:10,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:10,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1123689827, now seen corresponding path program 6 times [2024-06-21 22:12:10,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:10,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8213258] [2024-06-21 22:12:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:10,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:13,831 INFO 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 22:12:13,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:13,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8213258] [2024-06-21 22:12:13,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8213258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:13,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:13,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:12:13,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613067571] [2024-06-21 22:12:13,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:13,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:12:13,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:13,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:12:13,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:12:13,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:13,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 289 transitions, 3727 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:12:13,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:13,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:13,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:15,252 INFO L124 PetriNetUnfolderBase]: 3458/5777 cut-off events. [2024-06-21 22:12:15,252 INFO L125 PetriNetUnfolderBase]: For 237368/237368 co-relation queries the response was YES. [2024-06-21 22:12:15,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41597 conditions, 5777 events. 3458/5777 cut-off events. For 237368/237368 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 38479 event pairs, 1096 based on Foata normal form. 1/5777 useless extension candidates. Maximal degree in co-relation 41495. Up to 5417 conditions per place. [2024-06-21 22:12:15,316 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 54 changer transitions 0/310 dead transitions. [2024-06-21 22:12:15,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 310 transitions, 4475 flow [2024-06-21 22:12:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:12:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:12:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 22:12:15,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 22:12:15,318 INFO L175 Difference]: Start difference. First operand has 225 places, 289 transitions, 3727 flow. Second operand 7 states and 116 transitions. [2024-06-21 22:12:15,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 310 transitions, 4475 flow [2024-06-21 22:12:15,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 310 transitions, 4313 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 22:12:15,720 INFO L231 Difference]: Finished difference. Result has 228 places, 295 transitions, 3799 flow [2024-06-21 22:12:15,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3799, PETRI_PLACES=228, PETRI_TRANSITIONS=295} [2024-06-21 22:12:15,720 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 22:12:15,720 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 295 transitions, 3799 flow [2024-06-21 22:12:15,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:12:15,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:15,721 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 22:12:15,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 22:12:15,721 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:12:15,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:15,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1404620131, now seen corresponding path program 7 times [2024-06-21 22:12:15,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:15,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361085068] [2024-06-21 22:12:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:15,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:18,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:18,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361085068] [2024-06-21 22:12:18,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361085068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:18,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:18,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:12:18,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882812422] [2024-06-21 22:12:18,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:18,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:12:18,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:18,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:12:18,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:12:18,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:18,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 295 transitions, 3799 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:12:18,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:18,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:18,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:19,749 INFO L124 PetriNetUnfolderBase]: 3476/5783 cut-off events. [2024-06-21 22:12:19,750 INFO L125 PetriNetUnfolderBase]: For 247266/247266 co-relation queries the response was YES. [2024-06-21 22:12:19,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42258 conditions, 5783 events. 3476/5783 cut-off events. For 247266/247266 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 38256 event pairs, 877 based on Foata normal form. 2/5782 useless extension candidates. Maximal degree in co-relation 42154. Up to 5446 conditions per place. [2024-06-21 22:12:19,808 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 47 changer transitions 0/318 dead transitions. [2024-06-21 22:12:19,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 318 transitions, 4816 flow [2024-06-21 22:12:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:12:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:12:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 22:12:19,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 22:12:19,809 INFO L175 Difference]: Start difference. First operand has 228 places, 295 transitions, 3799 flow. Second operand 7 states and 115 transitions. [2024-06-21 22:12:19,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 318 transitions, 4816 flow [2024-06-21 22:12:20,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 318 transitions, 4713 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 22:12:20,151 INFO L231 Difference]: Finished difference. Result has 233 places, 303 transitions, 4014 flow [2024-06-21 22:12:20,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4014, PETRI_PLACES=233, PETRI_TRANSITIONS=303} [2024-06-21 22:12:20,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 22:12:20,152 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 303 transitions, 4014 flow [2024-06-21 22:12:20,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:12:20,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:20,152 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 22:12:20,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 22:12:20,152 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:12:20,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:20,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1397953891, now seen corresponding path program 8 times [2024-06-21 22:12:20,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:20,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967582324] [2024-06-21 22:12:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:20,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:22,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:22,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967582324] [2024-06-21 22:12:22,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967582324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:22,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:22,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 22:12:22,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761782083] [2024-06-21 22:12:22,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:22,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 22:12:22,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:22,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 22:12:22,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 22:12:22,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:22,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 303 transitions, 4014 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:12:22,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:22,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:22,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:23,873 INFO L124 PetriNetUnfolderBase]: 3470/5777 cut-off events. [2024-06-21 22:12:23,873 INFO L125 PetriNetUnfolderBase]: For 255832/255832 co-relation queries the response was YES. [2024-06-21 22:12:23,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42711 conditions, 5777 events. 3470/5777 cut-off events. For 255832/255832 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 38240 event pairs, 877 based on Foata normal form. 2/5776 useless extension candidates. Maximal degree in co-relation 42604. Up to 5466 conditions per place. [2024-06-21 22:12:23,938 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 276 selfloop transitions, 37 changer transitions 0/318 dead transitions. [2024-06-21 22:12:23,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 318 transitions, 4751 flow [2024-06-21 22:12:23,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 22:12:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 22:12:23,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 22:12:23,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-21 22:12:23,940 INFO L175 Difference]: Start difference. First operand has 233 places, 303 transitions, 4014 flow. Second operand 7 states and 113 transitions. [2024-06-21 22:12:23,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 318 transitions, 4751 flow [2024-06-21 22:12:24,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 318 transitions, 4595 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-21 22:12:24,357 INFO L231 Difference]: Finished difference. Result has 237 places, 304 transitions, 3957 flow [2024-06-21 22:12:24,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3862, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3957, PETRI_PLACES=237, PETRI_TRANSITIONS=304} [2024-06-21 22:12:24,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-21 22:12:24,358 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 304 transitions, 3957 flow [2024-06-21 22:12:24,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 22:12:24,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:24,358 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 22:12:24,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 22:12:24,359 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:12:24,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1120841795, now seen corresponding path program 1 times [2024-06-21 22:12:24,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:24,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033463483] [2024-06-21 22:12:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:24,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:27,018 INFO 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 22:12:27,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:27,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033463483] [2024-06-21 22:12:27,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033463483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:27,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:27,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:27,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787276055] [2024-06-21 22:12:27,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:27,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:27,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:27,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:27,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:27,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:12:27,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 304 transitions, 3957 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:27,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:27,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:12:27,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:28,847 INFO L124 PetriNetUnfolderBase]: 3518/5895 cut-off events. [2024-06-21 22:12:28,847 INFO L125 PetriNetUnfolderBase]: For 314546/314587 co-relation queries the response was YES. [2024-06-21 22:12:28,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44653 conditions, 5895 events. 3518/5895 cut-off events. For 314546/314587 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 39695 event pairs, 1481 based on Foata normal form. 14/5875 useless extension candidates. Maximal degree in co-relation 44544. Up to 5384 conditions per place. [2024-06-21 22:12:28,917 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 287 selfloop transitions, 35 changer transitions 0/342 dead transitions. [2024-06-21 22:12:28,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 342 transitions, 4917 flow [2024-06-21 22:12:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:12:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:12:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 22:12:28,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 22:12:28,919 INFO L175 Difference]: Start difference. First operand has 237 places, 304 transitions, 3957 flow. Second operand 8 states and 151 transitions. [2024-06-21 22:12:28,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 342 transitions, 4917 flow [2024-06-21 22:12:29,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 342 transitions, 4837 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 22:12:29,456 INFO L231 Difference]: Finished difference. Result has 240 places, 306 transitions, 3997 flow [2024-06-21 22:12:29,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3877, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3997, PETRI_PLACES=240, PETRI_TRANSITIONS=306} [2024-06-21 22:12:29,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-21 22:12:29,457 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 306 transitions, 3997 flow [2024-06-21 22:12:29,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:29,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:29,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:12:29,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 22:12:29,458 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:12:29,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:29,458 INFO L85 PathProgramCache]: Analyzing trace with hash -137911886, now seen corresponding path program 1 times [2024-06-21 22:12:29,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:29,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208706421] [2024-06-21 22:12:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:29,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:31,751 INFO 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 22:12:31,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:31,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208706421] [2024-06-21 22:12:31,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208706421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:31,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:31,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:31,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640101353] [2024-06-21 22:12:31,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:31,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:31,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:31,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:31,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:31,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:31,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 306 transitions, 3997 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:31,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:31,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:31,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:33,691 INFO L124 PetriNetUnfolderBase]: 3640/6034 cut-off events. [2024-06-21 22:12:33,691 INFO L125 PetriNetUnfolderBase]: For 298347/298347 co-relation queries the response was YES. [2024-06-21 22:12:33,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45855 conditions, 6034 events. 3640/6034 cut-off events. For 298347/298347 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 40054 event pairs, 911 based on Foata normal form. 4/6037 useless extension candidates. Maximal degree in co-relation 45745. Up to 5643 conditions per place. [2024-06-21 22:12:33,751 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 294 selfloop transitions, 55 changer transitions 0/354 dead transitions. [2024-06-21 22:12:33,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 354 transitions, 5211 flow [2024-06-21 22:12:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 22:12:33,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 22:12:33,753 INFO L175 Difference]: Start difference. First operand has 240 places, 306 transitions, 3997 flow. Second operand 9 states and 159 transitions. [2024-06-21 22:12:33,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 354 transitions, 5211 flow [2024-06-21 22:12:34,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 354 transitions, 5161 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 22:12:34,207 INFO L231 Difference]: Finished difference. Result has 247 places, 322 transitions, 4357 flow [2024-06-21 22:12:34,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3947, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4357, PETRI_PLACES=247, PETRI_TRANSITIONS=322} [2024-06-21 22:12:34,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 22:12:34,208 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 322 transitions, 4357 flow [2024-06-21 22:12:34,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:34,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:34,208 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 22:12:34,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 22:12:34,208 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:12:34,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:34,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2043924867, now seen corresponding path program 2 times [2024-06-21 22:12:34,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:34,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254398791] [2024-06-21 22:12:34,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:34,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:36,647 INFO 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 22:12:36,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:36,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254398791] [2024-06-21 22:12:36,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254398791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:36,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:36,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:36,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867891723] [2024-06-21 22:12:36,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:36,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:36,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:36,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:36,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:36,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:12:36,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 322 transitions, 4357 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:36,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:36,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:12:36,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:38,543 INFO L124 PetriNetUnfolderBase]: 3601/6017 cut-off events. [2024-06-21 22:12:38,543 INFO L125 PetriNetUnfolderBase]: For 348489/348520 co-relation queries the response was YES. [2024-06-21 22:12:38,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47211 conditions, 6017 events. 3601/6017 cut-off events. For 348489/348520 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 40679 event pairs, 1528 based on Foata normal form. 15/6001 useless extension candidates. Maximal degree in co-relation 47097. Up to 5606 conditions per place. [2024-06-21 22:12:38,619 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 298 selfloop transitions, 33 changer transitions 0/351 dead transitions. [2024-06-21 22:12:38,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 351 transitions, 5189 flow [2024-06-21 22:12:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:12:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:12:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 22:12:38,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:12:38,620 INFO L175 Difference]: Start difference. First operand has 247 places, 322 transitions, 4357 flow. Second operand 8 states and 144 transitions. [2024-06-21 22:12:38,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 351 transitions, 5189 flow [2024-06-21 22:12:39,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 351 transitions, 5077 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-21 22:12:39,202 INFO L231 Difference]: Finished difference. Result has 252 places, 323 transitions, 4342 flow [2024-06-21 22:12:39,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4245, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4342, PETRI_PLACES=252, PETRI_TRANSITIONS=323} [2024-06-21 22:12:39,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 22:12:39,202 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 323 transitions, 4342 flow [2024-06-21 22:12:39,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:39,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:39,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:12:39,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 22:12:39,203 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:12:39,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1170438984, now seen corresponding path program 2 times [2024-06-21 22:12:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:39,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811144947] [2024-06-21 22:12:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:39,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:41,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:41,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811144947] [2024-06-21 22:12:41,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811144947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:41,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:41,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:41,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080323068] [2024-06-21 22:12:41,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:41,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:41,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:41,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:41,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:41,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:41,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 323 transitions, 4342 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:41,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:41,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:41,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:43,743 INFO L124 PetriNetUnfolderBase]: 3704/6137 cut-off events. [2024-06-21 22:12:43,744 INFO L125 PetriNetUnfolderBase]: For 319937/319937 co-relation queries the response was YES. [2024-06-21 22:12:43,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47711 conditions, 6137 events. 3704/6137 cut-off events. For 319937/319937 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 40862 event pairs, 1139 based on Foata normal form. 4/6141 useless extension candidates. Maximal degree in co-relation 47595. Up to 5809 conditions per place. [2024-06-21 22:12:43,806 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 43 changer transitions 0/351 dead transitions. [2024-06-21 22:12:43,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 351 transitions, 5240 flow [2024-06-21 22:12:43,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:12:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:12:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:12:43,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 22:12:43,808 INFO L175 Difference]: Start difference. First operand has 252 places, 323 transitions, 4342 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:12:43,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 351 transitions, 5240 flow [2024-06-21 22:12:44,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 351 transitions, 5169 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 22:12:44,319 INFO L231 Difference]: Finished difference. Result has 254 places, 327 transitions, 4491 flow [2024-06-21 22:12:44,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4271, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4491, PETRI_PLACES=254, PETRI_TRANSITIONS=327} [2024-06-21 22:12:44,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 22:12:44,319 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 327 transitions, 4491 flow [2024-06-21 22:12:44,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:44,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:44,320 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 22:12:44,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 22:12:44,320 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:12:44,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:44,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1123698755, now seen corresponding path program 3 times [2024-06-21 22:12:44,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:44,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533660369] [2024-06-21 22:12:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:44,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:47,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:47,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533660369] [2024-06-21 22:12:47,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533660369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:47,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:47,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:47,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559245028] [2024-06-21 22:12:47,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:47,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:47,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:47,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:47,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:47,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:12:47,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 327 transitions, 4491 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:47,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:47,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:12:47,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:49,621 INFO L124 PetriNetUnfolderBase]: 3630/6065 cut-off events. [2024-06-21 22:12:49,621 INFO L125 PetriNetUnfolderBase]: For 358342/358365 co-relation queries the response was YES. [2024-06-21 22:12:49,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48044 conditions, 6065 events. 3630/6065 cut-off events. For 358342/358365 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 41021 event pairs, 1524 based on Foata normal form. 13/6049 useless extension candidates. Maximal degree in co-relation 47927. Up to 5682 conditions per place. [2024-06-21 22:12:49,704 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 313 selfloop transitions, 18 changer transitions 0/351 dead transitions. [2024-06-21 22:12:49,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 351 transitions, 5299 flow [2024-06-21 22:12:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:12:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:12:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:12:49,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 22:12:49,706 INFO L175 Difference]: Start difference. First operand has 254 places, 327 transitions, 4491 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:12:49,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 351 transitions, 5299 flow [2024-06-21 22:12:50,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 351 transitions, 5109 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 22:12:50,388 INFO L231 Difference]: Finished difference. Result has 256 places, 328 transitions, 4368 flow [2024-06-21 22:12:50,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4368, PETRI_PLACES=256, PETRI_TRANSITIONS=328} [2024-06-21 22:12:50,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-21 22:12:50,389 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 328 transitions, 4368 flow [2024-06-21 22:12:50,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:50,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:50,390 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 22:12:50,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 22:12:50,390 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:12:50,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:50,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1404629059, now seen corresponding path program 4 times [2024-06-21 22:12:50,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:50,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468355297] [2024-06-21 22:12:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:50,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:53,051 INFO 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 22:12:53,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:53,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468355297] [2024-06-21 22:12:53,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468355297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:53,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:53,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:12:53,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588317031] [2024-06-21 22:12:53,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:53,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:12:53,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:53,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:12:53,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:12:53,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 22:12:53,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 328 transitions, 4368 flow. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:53,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:53,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 22:12:53,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:12:55,010 INFO L124 PetriNetUnfolderBase]: 3770/6273 cut-off events. [2024-06-21 22:12:55,010 INFO L125 PetriNetUnfolderBase]: For 398639/398713 co-relation queries the response was YES. [2024-06-21 22:12:55,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50809 conditions, 6273 events. 3770/6273 cut-off events. For 398639/398713 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 42470 event pairs, 1406 based on Foata normal form. 15/6253 useless extension candidates. Maximal degree in co-relation 50691. Up to 5445 conditions per place. [2024-06-21 22:12:55,082 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 250 selfloop transitions, 102 changer transitions 0/372 dead transitions. [2024-06-21 22:12:55,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 372 transitions, 5679 flow [2024-06-21 22:12:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:12:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:12:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 22:12:55,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 22:12:55,084 INFO L175 Difference]: Start difference. First operand has 256 places, 328 transitions, 4368 flow. Second operand 9 states and 156 transitions. [2024-06-21 22:12:55,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 372 transitions, 5679 flow [2024-06-21 22:12:55,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 372 transitions, 5630 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 22:12:55,665 INFO L231 Difference]: Finished difference. Result has 260 places, 345 transitions, 5006 flow [2024-06-21 22:12:55,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5006, PETRI_PLACES=260, PETRI_TRANSITIONS=345} [2024-06-21 22:12:55,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 22:12:55,666 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 345 transitions, 5006 flow [2024-06-21 22:12:55,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:55,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:12:55,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:12:55,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 22:12:55,667 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:12:55,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:12:55,667 INFO L85 PathProgramCache]: Analyzing trace with hash -914999129, now seen corresponding path program 1 times [2024-06-21 22:12:55,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:12:55,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866643568] [2024-06-21 22:12:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:12:55,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:12:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:12:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:12:57,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:12:57,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866643568] [2024-06-21 22:12:57,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866643568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:12:57,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:12:57,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:12:57,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735989437] [2024-06-21 22:12:57,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:12:57,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:12:57,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:12:57,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:12:57,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:12:58,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:12:58,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 345 transitions, 5006 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:12:58,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:12:58,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:12:58,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:00,171 INFO L124 PetriNetUnfolderBase]: 3861/6381 cut-off events. [2024-06-21 22:13:00,172 INFO L125 PetriNetUnfolderBase]: For 362901/362901 co-relation queries the response was YES. [2024-06-21 22:13:00,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52537 conditions, 6381 events. 3861/6381 cut-off events. For 362901/362901 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 42557 event pairs, 1166 based on Foata normal form. 1/6382 useless extension candidates. Maximal degree in co-relation 52417. Up to 6068 conditions per place. [2024-06-21 22:13:00,257 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 45 changer transitions 0/402 dead transitions. [2024-06-21 22:13:00,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 402 transitions, 6388 flow [2024-06-21 22:13:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:13:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:13:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 22:13:00,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-21 22:13:00,259 INFO L175 Difference]: Start difference. First operand has 260 places, 345 transitions, 5006 flow. Second operand 10 states and 173 transitions. [2024-06-21 22:13:00,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 402 transitions, 6388 flow [2024-06-21 22:13:01,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 402 transitions, 6333 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 22:13:01,033 INFO L231 Difference]: Finished difference. Result has 269 places, 366 transitions, 5477 flow [2024-06-21 22:13:01,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4951, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5477, PETRI_PLACES=269, PETRI_TRANSITIONS=366} [2024-06-21 22:13:01,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-21 22:13:01,034 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 366 transitions, 5477 flow [2024-06-21 22:13:01,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:01,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:01,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:01,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 22:13:01,035 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:01,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:01,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1038892487, now seen corresponding path program 2 times [2024-06-21 22:13:01,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:01,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608182221] [2024-06-21 22:13:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:01,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:04,161 INFO 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 22:13:04,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:04,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608182221] [2024-06-21 22:13:04,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608182221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:04,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:04,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:04,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123155358] [2024-06-21 22:13:04,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:04,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:04,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:04,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:04,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:04,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:04,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 366 transitions, 5477 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:04,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:04,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:04,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:06,029 INFO L124 PetriNetUnfolderBase]: 3871/6395 cut-off events. [2024-06-21 22:13:06,029 INFO L125 PetriNetUnfolderBase]: For 378254/378254 co-relation queries the response was YES. [2024-06-21 22:13:06,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53740 conditions, 6395 events. 3871/6395 cut-off events. For 378254/378254 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 42642 event pairs, 1165 based on Foata normal form. 2/6397 useless extension candidates. Maximal degree in co-relation 53613. Up to 6056 conditions per place. [2024-06-21 22:13:06,114 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 350 selfloop transitions, 50 changer transitions 0/405 dead transitions. [2024-06-21 22:13:06,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 405 transitions, 6558 flow [2024-06-21 22:13:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:06,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:06,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 22:13:06,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 22:13:06,116 INFO L175 Difference]: Start difference. First operand has 269 places, 366 transitions, 5477 flow. Second operand 9 states and 157 transitions. [2024-06-21 22:13:06,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 405 transitions, 6558 flow [2024-06-21 22:13:06,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 405 transitions, 6403 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-06-21 22:13:06,886 INFO L231 Difference]: Finished difference. Result has 276 places, 372 transitions, 5615 flow [2024-06-21 22:13:06,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5615, PETRI_PLACES=276, PETRI_TRANSITIONS=372} [2024-06-21 22:13:06,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 22:13:06,887 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 372 transitions, 5615 flow [2024-06-21 22:13:06,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:06,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:06,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:06,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 22:13:06,888 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:06,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash -270939365, now seen corresponding path program 3 times [2024-06-21 22:13:06,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:06,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274826195] [2024-06-21 22:13:06,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:06,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:09,765 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 22:13:09,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:09,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274826195] [2024-06-21 22:13:09,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274826195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:09,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:09,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:09,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682895260] [2024-06-21 22:13:09,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:09,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:09,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:09,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:09,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:09,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 372 transitions, 5615 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:09,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:09,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:09,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:12,027 INFO L124 PetriNetUnfolderBase]: 3881/6409 cut-off events. [2024-06-21 22:13:12,027 INFO L125 PetriNetUnfolderBase]: For 394535/394535 co-relation queries the response was YES. [2024-06-21 22:13:12,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54784 conditions, 6409 events. 3881/6409 cut-off events. For 394535/394535 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 42685 event pairs, 1166 based on Foata normal form. 2/6411 useless extension candidates. Maximal degree in co-relation 54655. Up to 6106 conditions per place. [2024-06-21 22:13:12,106 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 364 selfloop transitions, 36 changer transitions 0/405 dead transitions. [2024-06-21 22:13:12,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 405 transitions, 6637 flow [2024-06-21 22:13:12,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:12,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 22:13:12,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 22:13:12,108 INFO L175 Difference]: Start difference. First operand has 276 places, 372 transitions, 5615 flow. Second operand 9 states and 152 transitions. [2024-06-21 22:13:12,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 405 transitions, 6637 flow [2024-06-21 22:13:12,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 405 transitions, 6425 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-21 22:13:12,969 INFO L231 Difference]: Finished difference. Result has 277 places, 376 transitions, 5610 flow [2024-06-21 22:13:12,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5403, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5610, PETRI_PLACES=277, PETRI_TRANSITIONS=376} [2024-06-21 22:13:12,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 22:13:12,970 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 376 transitions, 5610 flow [2024-06-21 22:13:12,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:12,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:12,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:12,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 22:13:12,971 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:12,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:12,971 INFO L85 PathProgramCache]: Analyzing trace with hash 822243408, now seen corresponding path program 3 times [2024-06-21 22:13:12,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:12,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329950814] [2024-06-21 22:13:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:12,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:15,237 INFO 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 22:13:15,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:15,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329950814] [2024-06-21 22:13:15,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329950814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:15,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:15,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:15,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240369945] [2024-06-21 22:13:15,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:15,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:15,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:15,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:15,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:15,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:15,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 376 transitions, 5610 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:15,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:15,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:15,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:17,405 INFO L124 PetriNetUnfolderBase]: 3891/6415 cut-off events. [2024-06-21 22:13:17,405 INFO L125 PetriNetUnfolderBase]: For 407078/407078 co-relation queries the response was YES. [2024-06-21 22:13:17,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55282 conditions, 6415 events. 3891/6415 cut-off events. For 407078/407078 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 42607 event pairs, 946 based on Foata normal form. 8/6422 useless extension candidates. Maximal degree in co-relation 55153. Up to 5996 conditions per place. [2024-06-21 22:13:17,492 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 337 selfloop transitions, 74 changer transitions 0/416 dead transitions. [2024-06-21 22:13:17,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 416 transitions, 6887 flow [2024-06-21 22:13:17,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 22:13:17,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 22:13:17,494 INFO L175 Difference]: Start difference. First operand has 277 places, 376 transitions, 5610 flow. Second operand 9 states and 158 transitions. [2024-06-21 22:13:17,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 416 transitions, 6887 flow [2024-06-21 22:13:18,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 416 transitions, 6520 flow, removed 150 selfloop flow, removed 7 redundant places. [2024-06-21 22:13:18,218 INFO L231 Difference]: Finished difference. Result has 279 places, 385 transitions, 5673 flow [2024-06-21 22:13:18,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5259, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5673, PETRI_PLACES=279, PETRI_TRANSITIONS=385} [2024-06-21 22:13:18,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 22:13:18,218 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 385 transitions, 5673 flow [2024-06-21 22:13:18,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:18,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:18,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:18,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 22:13:18,219 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:18,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:18,220 INFO L85 PathProgramCache]: Analyzing trace with hash -532940701, now seen corresponding path program 4 times [2024-06-21 22:13:18,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:18,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886851740] [2024-06-21 22:13:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:18,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:20,868 INFO 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 22:13:20,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:20,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886851740] [2024-06-21 22:13:20,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886851740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:20,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:20,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:20,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968552040] [2024-06-21 22:13:20,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:20,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:20,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:20,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:20,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:20,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:20,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 385 transitions, 5673 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:20,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:20,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:20,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:22,931 INFO L124 PetriNetUnfolderBase]: 3893/6418 cut-off events. [2024-06-21 22:13:22,931 INFO L125 PetriNetUnfolderBase]: For 391592/391592 co-relation queries the response was YES. [2024-06-21 22:13:22,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54886 conditions, 6418 events. 3893/6418 cut-off events. For 391592/391592 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 42651 event pairs, 944 based on Foata normal form. 2/6419 useless extension candidates. Maximal degree in co-relation 54756. Up to 6080 conditions per place. [2024-06-21 22:13:23,012 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 352 selfloop transitions, 56 changer transitions 0/413 dead transitions. [2024-06-21 22:13:23,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 413 transitions, 6669 flow [2024-06-21 22:13:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 22:13:23,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 22:13:23,013 INFO L175 Difference]: Start difference. First operand has 279 places, 385 transitions, 5673 flow. Second operand 9 states and 152 transitions. [2024-06-21 22:13:23,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 413 transitions, 6669 flow [2024-06-21 22:13:23,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 413 transitions, 6382 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-21 22:13:23,833 INFO L231 Difference]: Finished difference. Result has 283 places, 388 transitions, 5613 flow [2024-06-21 22:13:23,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5386, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5613, PETRI_PLACES=283, PETRI_TRANSITIONS=388} [2024-06-21 22:13:23,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 22:13:23,834 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 388 transitions, 5613 flow [2024-06-21 22:13:23,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:23,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:23,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:23,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 22:13:23,835 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:23,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:23,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1262009998, now seen corresponding path program 1 times [2024-06-21 22:13:23,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:23,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246913654] [2024-06-21 22:13:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:23,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:26,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:26,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246913654] [2024-06-21 22:13:26,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246913654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:26,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:26,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:13:26,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145651772] [2024-06-21 22:13:26,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:26,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:13:26,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:26,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:13:26,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:13:26,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:26,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 388 transitions, 5613 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:26,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:26,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:26,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:28,796 INFO L124 PetriNetUnfolderBase]: 3937/6486 cut-off events. [2024-06-21 22:13:28,796 INFO L125 PetriNetUnfolderBase]: For 427266/427266 co-relation queries the response was YES. [2024-06-21 22:13:28,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55953 conditions, 6486 events. 3937/6486 cut-off events. For 427266/427266 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 43134 event pairs, 942 based on Foata normal form. 12/6497 useless extension candidates. Maximal degree in co-relation 55822. Up to 6043 conditions per place. [2024-06-21 22:13:28,884 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 353 selfloop transitions, 64 changer transitions 0/422 dead transitions. [2024-06-21 22:13:28,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 422 transitions, 6714 flow [2024-06-21 22:13:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:13:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:13:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 22:13:28,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 22:13:28,885 INFO L175 Difference]: Start difference. First operand has 283 places, 388 transitions, 5613 flow. Second operand 9 states and 160 transitions. [2024-06-21 22:13:28,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 422 transitions, 6714 flow [2024-06-21 22:13:29,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 422 transitions, 6509 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 22:13:29,760 INFO L231 Difference]: Finished difference. Result has 285 places, 389 transitions, 5563 flow [2024-06-21 22:13:29,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5408, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5563, PETRI_PLACES=285, PETRI_TRANSITIONS=389} [2024-06-21 22:13:29,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 22:13:29,761 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 389 transitions, 5563 flow [2024-06-21 22:13:29,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:29,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:29,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:29,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 22:13:29,762 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:29,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:29,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1170529349, now seen corresponding path program 5 times [2024-06-21 22:13:29,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:29,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298571764] [2024-06-21 22:13:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:29,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:32,147 INFO 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 22:13:32,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:32,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298571764] [2024-06-21 22:13:32,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298571764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:32,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:32,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:32,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245512383] [2024-06-21 22:13:32,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:32,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:32,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:32,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:32,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:32,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:32,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 389 transitions, 5563 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:32,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:32,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:32,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:34,339 INFO L124 PetriNetUnfolderBase]: 3947/6511 cut-off events. [2024-06-21 22:13:34,339 INFO L125 PetriNetUnfolderBase]: For 417411/417411 co-relation queries the response was YES. [2024-06-21 22:13:34,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56314 conditions, 6511 events. 3947/6511 cut-off events. For 417411/417411 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 43410 event pairs, 1162 based on Foata normal form. 2/6513 useless extension candidates. Maximal degree in co-relation 56182. Up to 6130 conditions per place. [2024-06-21 22:13:34,417 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 356 selfloop transitions, 59 changer transitions 0/420 dead transitions. [2024-06-21 22:13:34,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 420 transitions, 6629 flow [2024-06-21 22:13:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:13:34,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:13:34,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 22:13:34,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 22:13:34,419 INFO L175 Difference]: Start difference. First operand has 285 places, 389 transitions, 5563 flow. Second operand 8 states and 138 transitions. [2024-06-21 22:13:34,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 420 transitions, 6629 flow [2024-06-21 22:13:35,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 420 transitions, 6499 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 22:13:35,215 INFO L231 Difference]: Finished difference. Result has 286 places, 393 transitions, 5709 flow [2024-06-21 22:13:35,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5433, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5709, PETRI_PLACES=286, PETRI_TRANSITIONS=393} [2024-06-21 22:13:35,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-21 22:13:35,216 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 393 transitions, 5709 flow [2024-06-21 22:13:35,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:35,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:35,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:35,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 22:13:35,217 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:35,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:35,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1170439139, now seen corresponding path program 6 times [2024-06-21 22:13:35,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:35,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913831047] [2024-06-21 22:13:35,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:35,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:35,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:40,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:40,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913831047] [2024-06-21 22:13:40,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913831047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:40,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:40,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:40,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087289203] [2024-06-21 22:13:40,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:40,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:40,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:40,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:40,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:40,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 393 transitions, 5709 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:40,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:40,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:40,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:42,615 INFO L124 PetriNetUnfolderBase]: 3962/6523 cut-off events. [2024-06-21 22:13:42,615 INFO L125 PetriNetUnfolderBase]: For 438289/438289 co-relation queries the response was YES. [2024-06-21 22:13:42,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57511 conditions, 6523 events. 3962/6523 cut-off events. For 438289/438289 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 43423 event pairs, 945 based on Foata normal form. 3/6525 useless extension candidates. Maximal degree in co-relation 57378. Up to 6036 conditions per place. [2024-06-21 22:13:42,691 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 322 selfloop transitions, 97 changer transitions 0/424 dead transitions. [2024-06-21 22:13:42,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 424 transitions, 6918 flow [2024-06-21 22:13:42,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:13:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:13:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:13:42,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 22:13:42,692 INFO L175 Difference]: Start difference. First operand has 286 places, 393 transitions, 5709 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:13:42,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 424 transitions, 6918 flow [2024-06-21 22:13:43,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 424 transitions, 6702 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 22:13:43,622 INFO L231 Difference]: Finished difference. Result has 289 places, 400 transitions, 5993 flow [2024-06-21 22:13:43,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5493, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5993, PETRI_PLACES=289, PETRI_TRANSITIONS=400} [2024-06-21 22:13:43,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 22:13:43,622 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 400 transitions, 5993 flow [2024-06-21 22:13:43,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:43,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:43,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:43,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 22:13:43,623 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:43,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1022829539, now seen corresponding path program 7 times [2024-06-21 22:13:43,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:43,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177034653] [2024-06-21 22:13:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:43,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:46,019 INFO 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 22:13:46,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:46,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177034653] [2024-06-21 22:13:46,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177034653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:46,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:46,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:46,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743772248] [2024-06-21 22:13:46,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:46,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:46,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:46,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:46,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 400 transitions, 5993 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:46,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:46,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:46,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:48,207 INFO L124 PetriNetUnfolderBase]: 3977/6548 cut-off events. [2024-06-21 22:13:48,207 INFO L125 PetriNetUnfolderBase]: For 467218/467218 co-relation queries the response was YES. [2024-06-21 22:13:48,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58886 conditions, 6548 events. 3977/6548 cut-off events. For 467218/467218 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 43560 event pairs, 945 based on Foata normal form. 2/6549 useless extension candidates. Maximal degree in co-relation 58751. Up to 6197 conditions per place. [2024-06-21 22:13:48,297 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 364 selfloop transitions, 61 changer transitions 0/430 dead transitions. [2024-06-21 22:13:48,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 430 transitions, 7132 flow [2024-06-21 22:13:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:13:48,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:13:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 22:13:48,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 22:13:48,299 INFO L175 Difference]: Start difference. First operand has 289 places, 400 transitions, 5993 flow. Second operand 8 states and 133 transitions. [2024-06-21 22:13:48,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 430 transitions, 7132 flow [2024-06-21 22:13:49,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 430 transitions, 6809 flow, removed 113 selfloop flow, removed 4 redundant places. [2024-06-21 22:13:49,288 INFO L231 Difference]: Finished difference. Result has 294 places, 410 transitions, 6057 flow [2024-06-21 22:13:49,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5672, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6057, PETRI_PLACES=294, PETRI_TRANSITIONS=410} [2024-06-21 22:13:49,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-21 22:13:49,288 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 410 transitions, 6057 flow [2024-06-21 22:13:49,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:49,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:49,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:49,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 22:13:49,289 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:49,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:49,289 INFO L85 PathProgramCache]: Analyzing trace with hash -757257736, now seen corresponding path program 4 times [2024-06-21 22:13:49,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:49,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491898513] [2024-06-21 22:13:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:49,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:51,497 INFO 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 22:13:51,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:51,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491898513] [2024-06-21 22:13:51,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491898513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:51,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:51,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:51,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525915182] [2024-06-21 22:13:51,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:51,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:51,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:51,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:51,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:51,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:51,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 410 transitions, 6057 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:51,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:51,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:51,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:53,651 INFO L124 PetriNetUnfolderBase]: 4012/6603 cut-off events. [2024-06-21 22:13:53,651 INFO L125 PetriNetUnfolderBase]: For 502818/502818 co-relation queries the response was YES. [2024-06-21 22:13:53,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60508 conditions, 6603 events. 4012/6603 cut-off events. For 502818/502818 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 44083 event pairs, 947 based on Foata normal form. 7/6609 useless extension candidates. Maximal degree in co-relation 60370. Up to 6145 conditions per place. [2024-06-21 22:13:53,742 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 80 changer transitions 0/443 dead transitions. [2024-06-21 22:13:53,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 443 transitions, 7386 flow [2024-06-21 22:13:53,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:13:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:13:53,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:13:53,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 22:13:53,744 INFO L175 Difference]: Start difference. First operand has 294 places, 410 transitions, 6057 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:13:53,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 443 transitions, 7386 flow [2024-06-21 22:13:54,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 443 transitions, 7137 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-21 22:13:54,807 INFO L231 Difference]: Finished difference. Result has 297 places, 416 transitions, 6240 flow [2024-06-21 22:13:54,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5808, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6240, PETRI_PLACES=297, PETRI_TRANSITIONS=416} [2024-06-21 22:13:54,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-21 22:13:54,807 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 416 transitions, 6240 flow [2024-06-21 22:13:54,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:54,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:13:54,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:13:54,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 22:13:54,808 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:13:54,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:13:54,809 INFO L85 PathProgramCache]: Analyzing trace with hash -757465126, now seen corresponding path program 5 times [2024-06-21 22:13:54,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:13:54,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508760174] [2024-06-21 22:13:54,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:13:54,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:13:54,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:13:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:13:57,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:13:57,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508760174] [2024-06-21 22:13:57,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508760174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:13:57,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:13:57,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:13:57,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295272268] [2024-06-21 22:13:57,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:13:57,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:13:57,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:13:57,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:13:57,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:13:57,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:13:57,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 416 transitions, 6240 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:13:57,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:13:57,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:13:57,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:13:59,184 INFO L124 PetriNetUnfolderBase]: 4042/6645 cut-off events. [2024-06-21 22:13:59,184 INFO L125 PetriNetUnfolderBase]: For 520322/520322 co-relation queries the response was YES. [2024-06-21 22:13:59,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61807 conditions, 6645 events. 4042/6645 cut-off events. For 520322/520322 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 44267 event pairs, 944 based on Foata normal form. 5/6649 useless extension candidates. Maximal degree in co-relation 61668. Up to 6181 conditions per place. [2024-06-21 22:13:59,269 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 370 selfloop transitions, 82 changer transitions 0/457 dead transitions. [2024-06-21 22:13:59,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 457 transitions, 7891 flow [2024-06-21 22:13:59,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:13:59,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:13:59,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 22:13:59,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 22:13:59,271 INFO L175 Difference]: Start difference. First operand has 297 places, 416 transitions, 6240 flow. Second operand 8 states and 139 transitions. [2024-06-21 22:13:59,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 457 transitions, 7891 flow [2024-06-21 22:14:00,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 457 transitions, 7437 flow, removed 155 selfloop flow, removed 6 redundant places. [2024-06-21 22:14:00,213 INFO L231 Difference]: Finished difference. Result has 300 places, 427 transitions, 6479 flow [2024-06-21 22:14:00,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5935, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6479, PETRI_PLACES=300, PETRI_TRANSITIONS=427} [2024-06-21 22:14:00,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 22:14:00,213 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 427 transitions, 6479 flow [2024-06-21 22:14:00,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:00,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:00,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:14:00,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 22:14:00,214 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:14:00,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:00,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1774180694, now seen corresponding path program 2 times [2024-06-21 22:14:00,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:00,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144310245] [2024-06-21 22:14:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:00,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:03,080 INFO 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 22:14:03,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:03,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144310245] [2024-06-21 22:14:03,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144310245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:03,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:03,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:14:03,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820555784] [2024-06-21 22:14:03,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:03,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:14:03,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:03,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:14:03,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:14:03,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:03,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 427 transitions, 6479 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:03,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:03,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:03,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:05,507 INFO L124 PetriNetUnfolderBase]: 4086/6711 cut-off events. [2024-06-21 22:14:05,508 INFO L125 PetriNetUnfolderBase]: For 532371/532371 co-relation queries the response was YES. [2024-06-21 22:14:05,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62047 conditions, 6711 events. 4086/6711 cut-off events. For 532371/532371 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 44758 event pairs, 949 based on Foata normal form. 12/6722 useless extension candidates. Maximal degree in co-relation 61906. Up to 6206 conditions per place. [2024-06-21 22:14:05,589 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 386 selfloop transitions, 65 changer transitions 0/456 dead transitions. [2024-06-21 22:14:05,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 456 transitions, 7669 flow [2024-06-21 22:14:05,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:05,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 22:14:05,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 22:14:05,591 INFO L175 Difference]: Start difference. First operand has 300 places, 427 transitions, 6479 flow. Second operand 8 states and 141 transitions. [2024-06-21 22:14:05,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 456 transitions, 7669 flow [2024-06-21 22:14:06,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 456 transitions, 7445 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-21 22:14:06,463 INFO L231 Difference]: Finished difference. Result has 304 places, 428 transitions, 6418 flow [2024-06-21 22:14:06,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6255, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6418, PETRI_PLACES=304, PETRI_TRANSITIONS=428} [2024-06-21 22:14:06,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 22:14:06,464 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 428 transitions, 6418 flow [2024-06-21 22:14:06,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:06,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:06,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:14:06,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 22:14:06,465 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:14:06,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:06,465 INFO L85 PathProgramCache]: Analyzing trace with hash 675974893, now seen corresponding path program 8 times [2024-06-21 22:14:06,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:06,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712296364] [2024-06-21 22:14:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:06,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:08,631 INFO 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 22:14:08,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:08,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712296364] [2024-06-21 22:14:08,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712296364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:08,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:08,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:08,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205746488] [2024-06-21 22:14:08,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:08,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:08,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:08,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:08,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:08,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:08,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 428 transitions, 6418 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:08,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:08,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:08,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:10,784 INFO L124 PetriNetUnfolderBase]: 4099/6740 cut-off events. [2024-06-21 22:14:10,784 INFO L125 PetriNetUnfolderBase]: For 510560/510560 co-relation queries the response was YES. [2024-06-21 22:14:10,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62195 conditions, 6740 events. 4099/6740 cut-off events. For 510560/510560 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 45136 event pairs, 1177 based on Foata normal form. 1/6740 useless extension candidates. Maximal degree in co-relation 62054. Up to 6379 conditions per place. [2024-06-21 22:14:10,880 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 58 changer transitions 0/466 dead transitions. [2024-06-21 22:14:10,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 466 transitions, 7895 flow [2024-06-21 22:14:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:10,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:10,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 22:14:10,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 22:14:10,882 INFO L175 Difference]: Start difference. First operand has 304 places, 428 transitions, 6418 flow. Second operand 8 states and 138 transitions. [2024-06-21 22:14:10,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 466 transitions, 7895 flow [2024-06-21 22:14:11,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 466 transitions, 7761 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 22:14:11,810 INFO L231 Difference]: Finished difference. Result has 308 places, 441 transitions, 6784 flow [2024-06-21 22:14:11,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6286, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6784, PETRI_PLACES=308, PETRI_TRANSITIONS=441} [2024-06-21 22:14:11,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-21 22:14:11,811 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 441 transitions, 6784 flow [2024-06-21 22:14:11,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:11,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:11,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:14:11,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 22:14:11,812 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:14:11,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:11,812 INFO L85 PathProgramCache]: Analyzing trace with hash 120385343, now seen corresponding path program 9 times [2024-06-21 22:14:11,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:11,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968128142] [2024-06-21 22:14:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:11,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:14:15,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:15,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968128142] [2024-06-21 22:14:15,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968128142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:15,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:15,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:15,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535968420] [2024-06-21 22:14:15,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:15,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:15,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:15,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:15,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:15,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:15,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 441 transitions, 6784 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:15,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:15,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:15,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:17,496 INFO L124 PetriNetUnfolderBase]: 4109/6751 cut-off events. [2024-06-21 22:14:17,496 INFO L125 PetriNetUnfolderBase]: For 521962/521962 co-relation queries the response was YES. [2024-06-21 22:14:17,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62954 conditions, 6751 events. 4109/6751 cut-off events. For 521962/521962 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 45147 event pairs, 1169 based on Foata normal form. 2/6752 useless extension candidates. Maximal degree in co-relation 62810. Up to 6388 conditions per place. [2024-06-21 22:14:17,589 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 415 selfloop transitions, 45 changer transitions 0/465 dead transitions. [2024-06-21 22:14:17,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 465 transitions, 7944 flow [2024-06-21 22:14:17,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 22:14:17,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 22:14:17,591 INFO L175 Difference]: Start difference. First operand has 308 places, 441 transitions, 6784 flow. Second operand 8 states and 133 transitions. [2024-06-21 22:14:17,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 465 transitions, 7944 flow [2024-06-21 22:14:18,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 465 transitions, 7755 flow, removed 84 selfloop flow, removed 2 redundant places. [2024-06-21 22:14:18,647 INFO L231 Difference]: Finished difference. Result has 314 places, 445 transitions, 6862 flow [2024-06-21 22:14:18,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6595, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6862, PETRI_PLACES=314, PETRI_TRANSITIONS=445} [2024-06-21 22:14:18,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-21 22:14:18,647 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 445 transitions, 6862 flow [2024-06-21 22:14:18,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:18,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:18,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:14:18,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 22:14:18,648 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:14:18,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash 376795643, now seen corresponding path program 10 times [2024-06-21 22:14:18,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:18,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848964162] [2024-06-21 22:14:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:18,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:20,885 INFO 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 22:14:20,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:20,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848964162] [2024-06-21 22:14:20,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848964162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:20,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:20,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:20,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765775505] [2024-06-21 22:14:20,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:20,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:20,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:20,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:20,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:20,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:20,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 445 transitions, 6862 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:20,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:20,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:20,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:23,037 INFO L124 PetriNetUnfolderBase]: 4130/6784 cut-off events. [2024-06-21 22:14:23,037 INFO L125 PetriNetUnfolderBase]: For 549331/549331 co-relation queries the response was YES. [2024-06-21 22:14:23,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64487 conditions, 6784 events. 4130/6784 cut-off events. For 549331/549331 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 45389 event pairs, 1173 based on Foata normal form. 1/6784 useless extension candidates. Maximal degree in co-relation 64341. Up to 6337 conditions per place. [2024-06-21 22:14:23,293 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 389 selfloop transitions, 94 changer transitions 0/488 dead transitions. [2024-06-21 22:14:23,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 488 transitions, 8589 flow [2024-06-21 22:14:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 22:14:23,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:14:23,295 INFO L175 Difference]: Start difference. First operand has 314 places, 445 transitions, 6862 flow. Second operand 8 states and 140 transitions. [2024-06-21 22:14:23,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 488 transitions, 8589 flow [2024-06-21 22:14:24,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 488 transitions, 8306 flow, removed 99 selfloop flow, removed 6 redundant places. [2024-06-21 22:14:24,192 INFO L231 Difference]: Finished difference. Result has 317 places, 462 transitions, 7226 flow [2024-06-21 22:14:24,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6579, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7226, PETRI_PLACES=317, PETRI_TRANSITIONS=462} [2024-06-21 22:14:24,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-21 22:14:24,193 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 462 transitions, 7226 flow [2024-06-21 22:14:24,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:24,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:24,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:14:24,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 22:14:24,193 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:14:24,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:24,194 INFO L85 PathProgramCache]: Analyzing trace with hash 388223483, now seen corresponding path program 11 times [2024-06-21 22:14:24,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:24,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451987289] [2024-06-21 22:14:24,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:24,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:14:26,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:26,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451987289] [2024-06-21 22:14:26,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451987289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:26,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:26,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:26,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758643130] [2024-06-21 22:14:26,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:26,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:26,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:26,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:26,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:26,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:26,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 462 transitions, 7226 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:26,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:26,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:26,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:28,823 INFO L124 PetriNetUnfolderBase]: 4135/6805 cut-off events. [2024-06-21 22:14:28,824 INFO L125 PetriNetUnfolderBase]: For 563416/563416 co-relation queries the response was YES. [2024-06-21 22:14:28,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65300 conditions, 6805 events. 4135/6805 cut-off events. For 563416/563416 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 45616 event pairs, 1174 based on Foata normal form. 1/6805 useless extension candidates. Maximal degree in co-relation 65152. Up to 6343 conditions per place. [2024-06-21 22:14:28,920 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 101 changer transitions 0/487 dead transitions. [2024-06-21 22:14:28,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 487 transitions, 8559 flow [2024-06-21 22:14:28,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:28,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:28,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:14:28,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 22:14:28,921 INFO L175 Difference]: Start difference. First operand has 317 places, 462 transitions, 7226 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:14:28,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 487 transitions, 8559 flow [2024-06-21 22:14:30,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 487 transitions, 8335 flow, removed 84 selfloop flow, removed 3 redundant places. [2024-06-21 22:14:30,138 INFO L231 Difference]: Finished difference. Result has 322 places, 466 transitions, 7359 flow [2024-06-21 22:14:30,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7034, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7359, PETRI_PLACES=322, PETRI_TRANSITIONS=466} [2024-06-21 22:14:30,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 22:14:30,139 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 466 transitions, 7359 flow [2024-06-21 22:14:30,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:30,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:30,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:14:30,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 22:14:30,140 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:14:30,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:30,140 INFO L85 PathProgramCache]: Analyzing trace with hash 473704054, now seen corresponding path program 6 times [2024-06-21 22:14:30,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:30,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293771240] [2024-06-21 22:14:30,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:30,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:14:32,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:32,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293771240] [2024-06-21 22:14:32,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293771240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:32,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:32,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:32,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817312135] [2024-06-21 22:14:32,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:32,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:32,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:32,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 466 transitions, 7359 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:32,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:32,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:32,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:34,818 INFO L124 PetriNetUnfolderBase]: 4155/6821 cut-off events. [2024-06-21 22:14:34,818 INFO L125 PetriNetUnfolderBase]: For 583936/583936 co-relation queries the response was YES. [2024-06-21 22:14:34,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66002 conditions, 6821 events. 4155/6821 cut-off events. For 583936/583936 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 45634 event pairs, 1169 based on Foata normal form. 4/6824 useless extension candidates. Maximal degree in co-relation 65852. Up to 6446 conditions per place. [2024-06-21 22:14:34,909 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 441 selfloop transitions, 45 changer transitions 0/491 dead transitions. [2024-06-21 22:14:34,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 491 transitions, 8591 flow [2024-06-21 22:14:34,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 22:14:34,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 22:14:34,911 INFO L175 Difference]: Start difference. First operand has 322 places, 466 transitions, 7359 flow. Second operand 8 states and 134 transitions. [2024-06-21 22:14:34,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 491 transitions, 8591 flow [2024-06-21 22:14:36,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 491 transitions, 8368 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-21 22:14:36,090 INFO L231 Difference]: Finished difference. Result has 326 places, 470 transitions, 7413 flow [2024-06-21 22:14:36,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7136, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7413, PETRI_PLACES=326, PETRI_TRANSITIONS=470} [2024-06-21 22:14:36,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-21 22:14:36,090 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 470 transitions, 7413 flow [2024-06-21 22:14:36,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:36,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:36,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:14:36,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 22:14:36,091 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:14:36,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:36,091 INFO L85 PathProgramCache]: Analyzing trace with hash 911301983, now seen corresponding path program 12 times [2024-06-21 22:14:36,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:36,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742893684] [2024-06-21 22:14:36,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:36,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:40,430 INFO 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 22:14:40,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:40,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742893684] [2024-06-21 22:14:40,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742893684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:40,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:40,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:40,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518657564] [2024-06-21 22:14:40,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:40,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:40,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:40,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:40,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:40,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:40,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 470 transitions, 7413 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:40,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:40,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:40,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:42,664 INFO L124 PetriNetUnfolderBase]: 4157/6824 cut-off events. [2024-06-21 22:14:42,664 INFO L125 PetriNetUnfolderBase]: For 590886/590886 co-relation queries the response was YES. [2024-06-21 22:14:42,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66381 conditions, 6824 events. 4157/6824 cut-off events. For 590886/590886 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 45697 event pairs, 1165 based on Foata normal form. 1/6824 useless extension candidates. Maximal degree in co-relation 66230. Up to 6413 conditions per place. [2024-06-21 22:14:42,769 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 419 selfloop transitions, 72 changer transitions 0/496 dead transitions. [2024-06-21 22:14:42,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 496 transitions, 8636 flow [2024-06-21 22:14:42,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:14:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:14:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 22:14:42,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 22:14:42,771 INFO L175 Difference]: Start difference. First operand has 326 places, 470 transitions, 7413 flow. Second operand 9 states and 142 transitions. [2024-06-21 22:14:42,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 496 transitions, 8636 flow [2024-06-21 22:14:44,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 496 transitions, 8395 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-21 22:14:44,232 INFO L231 Difference]: Finished difference. Result has 330 places, 479 transitions, 7539 flow [2024-06-21 22:14:44,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7172, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7539, PETRI_PLACES=330, PETRI_TRANSITIONS=479} [2024-06-21 22:14:44,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-21 22:14:44,233 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 479 transitions, 7539 flow [2024-06-21 22:14:44,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:44,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:44,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:14:44,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 22:14:44,234 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:14:44,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:44,234 INFO L85 PathProgramCache]: Analyzing trace with hash 474648538, now seen corresponding path program 7 times [2024-06-21 22:14:44,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:44,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834033512] [2024-06-21 22:14:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:44,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:47,408 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 22:14:47,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:47,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834033512] [2024-06-21 22:14:47,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834033512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:47,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:47,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:47,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549010612] [2024-06-21 22:14:47,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:47,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:47,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:47,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:47,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:47,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:47,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 479 transitions, 7539 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:47,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:47,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:47,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:49,638 INFO L124 PetriNetUnfolderBase]: 4175/6851 cut-off events. [2024-06-21 22:14:49,639 INFO L125 PetriNetUnfolderBase]: For 612304/612304 co-relation queries the response was YES. [2024-06-21 22:14:49,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67248 conditions, 6851 events. 4175/6851 cut-off events. For 612304/612304 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 45903 event pairs, 1161 based on Foata normal form. 2/6852 useless extension candidates. Maximal degree in co-relation 67095. Up to 6413 conditions per place. [2024-06-21 22:14:49,747 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 433 selfloop transitions, 67 changer transitions 0/505 dead transitions. [2024-06-21 22:14:49,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 505 transitions, 9011 flow [2024-06-21 22:14:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:49,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 22:14:49,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 22:14:49,749 INFO L175 Difference]: Start difference. First operand has 330 places, 479 transitions, 7539 flow. Second operand 8 states and 134 transitions. [2024-06-21 22:14:49,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 505 transitions, 9011 flow [2024-06-21 22:14:51,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 505 transitions, 8806 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-21 22:14:51,191 INFO L231 Difference]: Finished difference. Result has 333 places, 485 transitions, 7716 flow [2024-06-21 22:14:51,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7334, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7716, PETRI_PLACES=333, PETRI_TRANSITIONS=485} [2024-06-21 22:14:51,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 22:14:51,192 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 485 transitions, 7716 flow [2024-06-21 22:14:51,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:51,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:51,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:14:51,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 22:14:51,193 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:14:51,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:51,193 INFO L85 PathProgramCache]: Analyzing trace with hash 475064248, now seen corresponding path program 8 times [2024-06-21 22:14:51,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:51,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855361043] [2024-06-21 22:14:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:51,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:14:54,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:54,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855361043] [2024-06-21 22:14:54,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855361043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:54,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:54,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:54,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353550642] [2024-06-21 22:14:54,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:54,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:54,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:54,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:54,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:54,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:54,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 485 transitions, 7716 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:54,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:54,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:54,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:14:56,450 INFO L124 PetriNetUnfolderBase]: 4169/6847 cut-off events. [2024-06-21 22:14:56,450 INFO L125 PetriNetUnfolderBase]: For 621868/621868 co-relation queries the response was YES. [2024-06-21 22:14:56,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67427 conditions, 6847 events. 4169/6847 cut-off events. For 621868/621868 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 46076 event pairs, 1645 based on Foata normal form. 2/6848 useless extension candidates. Maximal degree in co-relation 67272. Up to 6576 conditions per place. [2024-06-21 22:14:56,558 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 480 selfloop transitions, 18 changer transitions 0/503 dead transitions. [2024-06-21 22:14:56,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 503 transitions, 8790 flow [2024-06-21 22:14:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:14:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:14:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 22:14:56,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 22:14:56,560 INFO L175 Difference]: Start difference. First operand has 333 places, 485 transitions, 7716 flow. Second operand 8 states and 125 transitions. [2024-06-21 22:14:56,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 503 transitions, 8790 flow [2024-06-21 22:14:57,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 503 transitions, 8510 flow, removed 104 selfloop flow, removed 4 redundant places. [2024-06-21 22:14:57,938 INFO L231 Difference]: Finished difference. Result has 337 places, 485 transitions, 7478 flow [2024-06-21 22:14:57,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7436, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7478, PETRI_PLACES=337, PETRI_TRANSITIONS=485} [2024-06-21 22:14:57,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-21 22:14:57,939 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 485 transitions, 7478 flow [2024-06-21 22:14:57,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:57,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:14:57,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:14:57,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 22:14:57,939 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:14:57,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:14:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1478305202, now seen corresponding path program 9 times [2024-06-21 22:14:57,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:14:57,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418734844] [2024-06-21 22:14:57,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:14:57,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:14:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:14:59,954 INFO 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 22:14:59,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:14:59,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418734844] [2024-06-21 22:14:59,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418734844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:14:59,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:14:59,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:14:59,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829541754] [2024-06-21 22:14:59,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:14:59,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:14:59,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:14:59,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:14:59,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:14:59,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:14:59,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 485 transitions, 7478 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:14:59,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:14:59,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:14:59,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:02,325 INFO L124 PetriNetUnfolderBase]: 4194/6861 cut-off events. [2024-06-21 22:15:02,325 INFO L125 PetriNetUnfolderBase]: For 634938/634938 co-relation queries the response was YES. [2024-06-21 22:15:02,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67806 conditions, 6861 events. 4194/6861 cut-off events. For 634938/634938 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 45667 event pairs, 954 based on Foata normal form. 5/6863 useless extension candidates. Maximal degree in co-relation 67649. Up to 6479 conditions per place. [2024-06-21 22:15:02,438 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 451 selfloop transitions, 55 changer transitions 0/511 dead transitions. [2024-06-21 22:15:02,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 511 transitions, 9001 flow [2024-06-21 22:15:02,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:15:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:15:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 22:15:02,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 22:15:02,440 INFO L175 Difference]: Start difference. First operand has 337 places, 485 transitions, 7478 flow. Second operand 8 states and 129 transitions. [2024-06-21 22:15:02,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 511 transitions, 9001 flow [2024-06-21 22:15:03,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 511 transitions, 8903 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 22:15:03,822 INFO L231 Difference]: Finished difference. Result has 337 places, 491 transitions, 7752 flow [2024-06-21 22:15:03,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7380, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7752, PETRI_PLACES=337, PETRI_TRANSITIONS=491} [2024-06-21 22:15:03,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-21 22:15:03,823 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 491 transitions, 7752 flow [2024-06-21 22:15:03,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:03,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:03,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:15:03,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 22:15:03,824 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:15:03,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:03,825 INFO L85 PathProgramCache]: Analyzing trace with hash 386899775, now seen corresponding path program 13 times [2024-06-21 22:15:03,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:03,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580606804] [2024-06-21 22:15:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:03,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:06,173 INFO 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 22:15:06,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:06,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580606804] [2024-06-21 22:15:06,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580606804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:06,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:06,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:15:06,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369474687] [2024-06-21 22:15:06,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:06,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:15:06,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:06,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:15:06,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:15:06,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:06,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 491 transitions, 7752 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:06,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:06,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:06,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:08,581 INFO L124 PetriNetUnfolderBase]: 4196/6864 cut-off events. [2024-06-21 22:15:08,581 INFO L125 PetriNetUnfolderBase]: For 644776/644776 co-relation queries the response was YES. [2024-06-21 22:15:08,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68494 conditions, 6864 events. 4196/6864 cut-off events. For 644776/644776 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 45716 event pairs, 966 based on Foata normal form. 2/6863 useless extension candidates. Maximal degree in co-relation 68337. Up to 6522 conditions per place. [2024-06-21 22:15:08,683 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 452 selfloop transitions, 52 changer transitions 0/509 dead transitions. [2024-06-21 22:15:08,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 509 transitions, 8991 flow [2024-06-21 22:15:08,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:15:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:15:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 22:15:08,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 22:15:08,684 INFO L175 Difference]: Start difference. First operand has 337 places, 491 transitions, 7752 flow. Second operand 8 states and 126 transitions. [2024-06-21 22:15:08,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 509 transitions, 8991 flow [2024-06-21 22:15:10,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 509 transitions, 8707 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-21 22:15:10,007 INFO L231 Difference]: Finished difference. Result has 341 places, 496 transitions, 7784 flow [2024-06-21 22:15:10,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7468, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7784, PETRI_PLACES=341, PETRI_TRANSITIONS=496} [2024-06-21 22:15:10,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-21 22:15:10,008 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 496 transitions, 7784 flow [2024-06-21 22:15:10,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:10,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:10,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:15:10,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 22:15:10,008 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:15:10,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:10,009 INFO L85 PathProgramCache]: Analyzing trace with hash 386899930, now seen corresponding path program 10 times [2024-06-21 22:15:10,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:10,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647068500] [2024-06-21 22:15:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:10,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:15:12,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:12,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647068500] [2024-06-21 22:15:12,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647068500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:12,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:12,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:15:12,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205327564] [2024-06-21 22:15:12,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:12,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:15:12,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:12,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:15:12,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:15:12,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:12,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 496 transitions, 7784 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:12,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:12,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:12,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:14,894 INFO L124 PetriNetUnfolderBase]: 4253/6951 cut-off events. [2024-06-21 22:15:14,894 INFO L125 PetriNetUnfolderBase]: For 692599/692599 co-relation queries the response was YES. [2024-06-21 22:15:14,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70727 conditions, 6951 events. 4253/6951 cut-off events. For 692599/692599 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 46341 event pairs, 959 based on Foata normal form. 5/6953 useless extension candidates. Maximal degree in co-relation 70568. Up to 6502 conditions per place. [2024-06-21 22:15:14,991 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 454 selfloop transitions, 71 changer transitions 0/530 dead transitions. [2024-06-21 22:15:14,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 530 transitions, 9801 flow [2024-06-21 22:15:14,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:15:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:15:14,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 22:15:14,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 22:15:14,993 INFO L175 Difference]: Start difference. First operand has 341 places, 496 transitions, 7784 flow. Second operand 8 states and 132 transitions. [2024-06-21 22:15:14,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 530 transitions, 9801 flow [2024-06-21 22:15:16,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 530 transitions, 9479 flow, removed 117 selfloop flow, removed 5 redundant places. [2024-06-21 22:15:16,332 INFO L231 Difference]: Finished difference. Result has 344 places, 506 transitions, 8124 flow [2024-06-21 22:15:16,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7462, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8124, PETRI_PLACES=344, PETRI_TRANSITIONS=506} [2024-06-21 22:15:16,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-21 22:15:16,333 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 506 transitions, 8124 flow [2024-06-21 22:15:16,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:16,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:16,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:15:16,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 22:15:16,334 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:15:16,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:16,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1685166962, now seen corresponding path program 11 times [2024-06-21 22:15:16,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:16,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997149922] [2024-06-21 22:15:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:16,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:18,696 INFO 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 22:15:18,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:18,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997149922] [2024-06-21 22:15:18,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997149922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:18,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:18,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:15:18,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93557641] [2024-06-21 22:15:18,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:18,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:15:18,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:18,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:15:18,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:15:18,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:18,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 506 transitions, 8124 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:18,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:18,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:18,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:21,185 INFO L124 PetriNetUnfolderBase]: 4288/7021 cut-off events. [2024-06-21 22:15:21,186 INFO L125 PetriNetUnfolderBase]: For 723888/723888 co-relation queries the response was YES. [2024-06-21 22:15:21,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71994 conditions, 7021 events. 4288/7021 cut-off events. For 723888/723888 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 47241 event pairs, 1655 based on Foata normal form. 5/7025 useless extension candidates. Maximal degree in co-relation 71834. Up to 6730 conditions per place. [2024-06-21 22:15:21,301 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 502 selfloop transitions, 25 changer transitions 0/532 dead transitions. [2024-06-21 22:15:21,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 532 transitions, 9589 flow [2024-06-21 22:15:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:15:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:15:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 22:15:21,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 22:15:21,303 INFO L175 Difference]: Start difference. First operand has 344 places, 506 transitions, 8124 flow. Second operand 8 states and 125 transitions. [2024-06-21 22:15:21,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 532 transitions, 9589 flow [2024-06-21 22:15:23,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 532 transitions, 9330 flow, removed 100 selfloop flow, removed 4 redundant places. [2024-06-21 22:15:23,027 INFO L231 Difference]: Finished difference. Result has 348 places, 514 transitions, 8198 flow [2024-06-21 22:15:23,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7865, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8198, PETRI_PLACES=348, PETRI_TRANSITIONS=514} [2024-06-21 22:15:23,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-21 22:15:23,028 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 514 transitions, 8198 flow [2024-06-21 22:15:23,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:23,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:23,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:15:23,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 22:15:23,029 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:15:23,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:23,029 INFO L85 PathProgramCache]: Analyzing trace with hash 593820125, now seen corresponding path program 14 times [2024-06-21 22:15:23,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:23,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209295443] [2024-06-21 22:15:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:23,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:15:25,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:25,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209295443] [2024-06-21 22:15:25,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209295443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:25,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:25,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:15:25,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372519134] [2024-06-21 22:15:25,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:25,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:15:25,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:25,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:15:25,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:15:25,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:25,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 514 transitions, 8198 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:25,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:25,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:25,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:27,908 INFO L124 PetriNetUnfolderBase]: 4345/7092 cut-off events. [2024-06-21 22:15:27,908 INFO L125 PetriNetUnfolderBase]: For 744321/744321 co-relation queries the response was YES. [2024-06-21 22:15:27,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74125 conditions, 7092 events. 4345/7092 cut-off events. For 744321/744321 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 47314 event pairs, 797 based on Foata normal form. 1/7090 useless extension candidates. Maximal degree in co-relation 73963. Up to 6154 conditions per place. [2024-06-21 22:15:28,010 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 352 selfloop transitions, 192 changer transitions 0/549 dead transitions. [2024-06-21 22:15:28,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 549 transitions, 10070 flow [2024-06-21 22:15:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:15:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:15:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 22:15:28,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-21 22:15:28,011 INFO L175 Difference]: Start difference. First operand has 348 places, 514 transitions, 8198 flow. Second operand 9 states and 152 transitions. [2024-06-21 22:15:28,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 549 transitions, 10070 flow [2024-06-21 22:15:29,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 549 transitions, 9734 flow, removed 143 selfloop flow, removed 5 redundant places. [2024-06-21 22:15:29,940 INFO L231 Difference]: Finished difference. Result has 353 places, 525 transitions, 8745 flow [2024-06-21 22:15:29,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7912, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8745, PETRI_PLACES=353, PETRI_TRANSITIONS=525} [2024-06-21 22:15:29,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-21 22:15:29,941 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 525 transitions, 8745 flow [2024-06-21 22:15:29,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:29,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:29,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:15:29,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 22:15:29,942 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:15:29,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:29,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1684751252, now seen corresponding path program 12 times [2024-06-21 22:15:29,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:29,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191585724] [2024-06-21 22:15:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:29,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:32,414 INFO 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 22:15:32,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:32,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191585724] [2024-06-21 22:15:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191585724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:32,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:32,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:15:32,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348675634] [2024-06-21 22:15:32,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:32,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:15:32,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:32,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:15:32,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:15:32,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:32,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 525 transitions, 8745 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:32,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:32,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:32,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:34,763 INFO L124 PetriNetUnfolderBase]: 4381/7153 cut-off events. [2024-06-21 22:15:34,763 INFO L125 PetriNetUnfolderBase]: For 786188/786188 co-relation queries the response was YES. [2024-06-21 22:15:34,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76812 conditions, 7153 events. 4381/7153 cut-off events. For 786188/786188 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 47778 event pairs, 967 based on Foata normal form. 4/7154 useless extension candidates. Maximal degree in co-relation 76648. Up to 6501 conditions per place. [2024-06-21 22:15:34,879 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 429 selfloop transitions, 127 changer transitions 0/561 dead transitions. [2024-06-21 22:15:34,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 561 transitions, 11058 flow [2024-06-21 22:15:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:15:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:15:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 22:15:34,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 22:15:34,881 INFO L175 Difference]: Start difference. First operand has 353 places, 525 transitions, 8745 flow. Second operand 8 states and 135 transitions. [2024-06-21 22:15:34,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 561 transitions, 11058 flow [2024-06-21 22:15:36,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 561 transitions, 10956 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 22:15:36,703 INFO L231 Difference]: Finished difference. Result has 357 places, 534 transitions, 9440 flow [2024-06-21 22:15:36,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8649, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9440, PETRI_PLACES=357, PETRI_TRANSITIONS=534} [2024-06-21 22:15:36,720 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-21 22:15:36,720 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 534 transitions, 9440 flow [2024-06-21 22:15:36,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:36,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:36,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:15:36,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 22:15:36,721 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:15:36,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:36,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1684751097, now seen corresponding path program 15 times [2024-06-21 22:15:36,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:36,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100940257] [2024-06-21 22:15:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:36,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:39,550 INFO 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 22:15:39,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:39,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100940257] [2024-06-21 22:15:39,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100940257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:39,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:39,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:15:39,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644219612] [2024-06-21 22:15:39,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:39,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:15:39,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:39,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:15:39,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:15:39,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:39,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 534 transitions, 9440 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:39,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:39,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:39,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:41,997 INFO L124 PetriNetUnfolderBase]: 4383/7156 cut-off events. [2024-06-21 22:15:41,997 INFO L125 PetriNetUnfolderBase]: For 803501/803501 co-relation queries the response was YES. [2024-06-21 22:15:42,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77840 conditions, 7156 events. 4383/7156 cut-off events. For 803501/803501 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 47813 event pairs, 970 based on Foata normal form. 2/7155 useless extension candidates. Maximal degree in co-relation 77674. Up to 6756 conditions per place. [2024-06-21 22:15:42,127 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 467 selfloop transitions, 77 changer transitions 0/549 dead transitions. [2024-06-21 22:15:42,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 549 transitions, 10726 flow [2024-06-21 22:15:42,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:15:42,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:15:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 22:15:42,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 22:15:42,129 INFO L175 Difference]: Start difference. First operand has 357 places, 534 transitions, 9440 flow. Second operand 8 states and 127 transitions. [2024-06-21 22:15:42,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 549 transitions, 10726 flow [2024-06-21 22:15:44,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 549 transitions, 10321 flow, removed 139 selfloop flow, removed 4 redundant places. [2024-06-21 22:15:44,441 INFO L231 Difference]: Finished difference. Result has 361 places, 537 transitions, 9365 flow [2024-06-21 22:15:44,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9035, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9365, PETRI_PLACES=361, PETRI_TRANSITIONS=537} [2024-06-21 22:15:44,441 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-21 22:15:44,441 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 537 transitions, 9365 flow [2024-06-21 22:15:44,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:44,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:44,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:15:44,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 22:15:44,442 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:15:44,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:44,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1884468752, now seen corresponding path program 13 times [2024-06-21 22:15:44,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:44,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349067381] [2024-06-21 22:15:44,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:44,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:46,933 INFO 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 22:15:46,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:46,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349067381] [2024-06-21 22:15:46,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349067381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:46,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:46,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:15:46,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152327917] [2024-06-21 22:15:46,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:46,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:15:46,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:46,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:15:46,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:15:46,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:46,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 537 transitions, 9365 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:46,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:46,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:46,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:50,132 INFO L124 PetriNetUnfolderBase]: 4454/7300 cut-off events. [2024-06-21 22:15:50,132 INFO L125 PetriNetUnfolderBase]: For 873315/873315 co-relation queries the response was YES. [2024-06-21 22:15:50,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80906 conditions, 7300 events. 4454/7300 cut-off events. For 873315/873315 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 49322 event pairs, 1673 based on Foata normal form. 5/7304 useless extension candidates. Maximal degree in co-relation 80738. Up to 6871 conditions per place. [2024-06-21 22:15:50,250 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 532 selfloop transitions, 48 changer transitions 0/585 dead transitions. [2024-06-21 22:15:50,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 585 transitions, 12001 flow [2024-06-21 22:15:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:15:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:15:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-21 22:15:50,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 22:15:50,252 INFO L175 Difference]: Start difference. First operand has 361 places, 537 transitions, 9365 flow. Second operand 10 states and 160 transitions. [2024-06-21 22:15:50,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 585 transitions, 12001 flow [2024-06-21 22:15:52,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 585 transitions, 11557 flow, removed 149 selfloop flow, removed 6 redundant places. [2024-06-21 22:15:52,522 INFO L231 Difference]: Finished difference. Result has 368 places, 556 transitions, 9812 flow [2024-06-21 22:15:52,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8921, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9812, PETRI_PLACES=368, PETRI_TRANSITIONS=556} [2024-06-21 22:15:52,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-21 22:15:52,522 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 556 transitions, 9812 flow [2024-06-21 22:15:52,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:52,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:52,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:15:52,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 22:15:52,523 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:15:52,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:52,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1877802512, now seen corresponding path program 14 times [2024-06-21 22:15:52,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:52,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195316752] [2024-06-21 22:15:52,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:52,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:15:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:15:54,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:15:54,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195316752] [2024-06-21 22:15:54,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195316752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:15:54,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:15:54,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:15:54,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928221598] [2024-06-21 22:15:54,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:15:54,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:15:54,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:15:54,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:15:54,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:15:54,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:15:54,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 556 transitions, 9812 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:54,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:15:54,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:15:54,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:15:57,485 INFO L124 PetriNetUnfolderBase]: 4442/7282 cut-off events. [2024-06-21 22:15:57,485 INFO L125 PetriNetUnfolderBase]: For 875884/875884 co-relation queries the response was YES. [2024-06-21 22:15:57,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80987 conditions, 7282 events. 4442/7282 cut-off events. For 875884/875884 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 49207 event pairs, 1671 based on Foata normal form. 4/7285 useless extension candidates. Maximal degree in co-relation 80815. Up to 6972 conditions per place. [2024-06-21 22:15:57,600 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 549 selfloop transitions, 19 changer transitions 0/573 dead transitions. [2024-06-21 22:15:57,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 573 transitions, 11141 flow [2024-06-21 22:15:57,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:15:57,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:15:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 22:15:57,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-21 22:15:57,601 INFO L175 Difference]: Start difference. First operand has 368 places, 556 transitions, 9812 flow. Second operand 8 states and 121 transitions. [2024-06-21 22:15:57,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 573 transitions, 11141 flow [2024-06-21 22:15:59,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 573 transitions, 10867 flow, removed 101 selfloop flow, removed 6 redundant places. [2024-06-21 22:15:59,599 INFO L231 Difference]: Finished difference. Result has 371 places, 557 transitions, 9638 flow [2024-06-21 22:15:59,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9544, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9638, PETRI_PLACES=371, PETRI_TRANSITIONS=557} [2024-06-21 22:15:59,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-21 22:15:59,600 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 557 transitions, 9638 flow [2024-06-21 22:15:59,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:15:59,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:15:59,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:15:59,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 22:15:59,601 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:15:59,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:15:59,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1892095248, now seen corresponding path program 3 times [2024-06-21 22:15:59,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:15:59,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146157367] [2024-06-21 22:15:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:15:59,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:15:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:02,842 INFO 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 22:16:02,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:02,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146157367] [2024-06-21 22:16:02,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146157367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:02,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:02,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:02,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320003272] [2024-06-21 22:16:02,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:02,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:02,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:02,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:02,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:02,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:02,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 557 transitions, 9638 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:02,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:02,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:02,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:05,797 INFO L124 PetriNetUnfolderBase]: 4542/7434 cut-off events. [2024-06-21 22:16:05,798 INFO L125 PetriNetUnfolderBase]: For 946085/946085 co-relation queries the response was YES. [2024-06-21 22:16:05,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83243 conditions, 7434 events. 4542/7434 cut-off events. For 946085/946085 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 50238 event pairs, 1677 based on Foata normal form. 8/7441 useless extension candidates. Maximal degree in co-relation 83069. Up to 7004 conditions per place. [2024-06-21 22:16:05,913 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 555 selfloop transitions, 24 changer transitions 0/584 dead transitions. [2024-06-21 22:16:05,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 584 transitions, 11420 flow [2024-06-21 22:16:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:16:05,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:16:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 22:16:05,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 22:16:05,922 INFO L175 Difference]: Start difference. First operand has 371 places, 557 transitions, 9638 flow. Second operand 9 states and 142 transitions. [2024-06-21 22:16:05,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 584 transitions, 11420 flow [2024-06-21 22:16:07,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 584 transitions, 11347 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 22:16:07,945 INFO L231 Difference]: Finished difference. Result has 375 places, 559 transitions, 9667 flow [2024-06-21 22:16:07,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9565, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9667, PETRI_PLACES=375, PETRI_TRANSITIONS=559} [2024-06-21 22:16:07,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 22:16:07,946 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 559 transitions, 9667 flow [2024-06-21 22:16:07,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:07,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:07,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:07,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 22:16:07,946 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:16:07,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:07,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1478313138, now seen corresponding path program 4 times [2024-06-21 22:16:07,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:07,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758958144] [2024-06-21 22:16:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:07,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:16:10,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:10,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758958144] [2024-06-21 22:16:10,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758958144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:10,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:10,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:10,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375688048] [2024-06-21 22:16:10,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:10,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:10,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:10,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:10,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:10,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:10,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 559 transitions, 9667 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:10,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:10,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:10,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:13,699 INFO L124 PetriNetUnfolderBase]: 4560/7441 cut-off events. [2024-06-21 22:16:13,699 INFO L125 PetriNetUnfolderBase]: For 954290/954290 co-relation queries the response was YES. [2024-06-21 22:16:13,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83265 conditions, 7441 events. 4560/7441 cut-off events. For 954290/954290 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 49858 event pairs, 1002 based on Foata normal form. 12/7450 useless extension candidates. Maximal degree in co-relation 83090. Up to 6947 conditions per place. [2024-06-21 22:16:13,807 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 515 selfloop transitions, 62 changer transitions 0/582 dead transitions. [2024-06-21 22:16:13,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 582 transitions, 11228 flow [2024-06-21 22:16:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:16:13,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:16:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 22:16:13,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 22:16:13,809 INFO L175 Difference]: Start difference. First operand has 375 places, 559 transitions, 9667 flow. Second operand 8 states and 134 transitions. [2024-06-21 22:16:13,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 582 transitions, 11228 flow [2024-06-21 22:16:16,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 582 transitions, 11191 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 22:16:16,194 INFO L231 Difference]: Finished difference. Result has 378 places, 560 transitions, 9788 flow [2024-06-21 22:16:16,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9630, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9788, PETRI_PLACES=378, PETRI_TRANSITIONS=560} [2024-06-21 22:16:16,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 22:16:16,199 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 560 transitions, 9788 flow [2024-06-21 22:16:16,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:16,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:16,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:16,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 22:16:16,200 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:16:16,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:16,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1891620018, now seen corresponding path program 5 times [2024-06-21 22:16:16,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:16,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040737917] [2024-06-21 22:16:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:16,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:19,769 INFO 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 22:16:19,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:19,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040737917] [2024-06-21 22:16:19,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040737917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:19,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:19,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:19,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177312688] [2024-06-21 22:16:19,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:19,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:19,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:19,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:19,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:19,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:19,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 560 transitions, 9788 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:19,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:19,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:19,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:22,841 INFO L124 PetriNetUnfolderBase]: 4532/7424 cut-off events. [2024-06-21 22:16:22,841 INFO L125 PetriNetUnfolderBase]: For 923995/923995 co-relation queries the response was YES. [2024-06-21 22:16:22,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82198 conditions, 7424 events. 4532/7424 cut-off events. For 923995/923995 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 50210 event pairs, 1683 based on Foata normal form. 12/7435 useless extension candidates. Maximal degree in co-relation 82021. Up to 7060 conditions per place. [2024-06-21 22:16:22,966 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 553 selfloop transitions, 21 changer transitions 0/579 dead transitions. [2024-06-21 22:16:22,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 579 transitions, 11208 flow [2024-06-21 22:16:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:16:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:16:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 22:16:22,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 22:16:22,967 INFO L175 Difference]: Start difference. First operand has 378 places, 560 transitions, 9788 flow. Second operand 8 states and 126 transitions. [2024-06-21 22:16:22,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 579 transitions, 11208 flow [2024-06-21 22:16:25,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 579 transitions, 11072 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 22:16:25,354 INFO L231 Difference]: Finished difference. Result has 380 places, 560 transitions, 9700 flow [2024-06-21 22:16:25,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9652, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9700, PETRI_PLACES=380, PETRI_TRANSITIONS=560} [2024-06-21 22:16:25,355 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-21 22:16:25,355 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 560 transitions, 9700 flow [2024-06-21 22:16:25,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:25,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:25,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:25,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 22:16:25,355 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:16:25,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:25,356 INFO L85 PathProgramCache]: Analyzing trace with hash 475079128, now seen corresponding path program 1 times [2024-06-21 22:16:25,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:25,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897232626] [2024-06-21 22:16:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:25,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:29,303 INFO 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 22:16:29,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:29,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897232626] [2024-06-21 22:16:29,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897232626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:29,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:29,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:29,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655346809] [2024-06-21 22:16:29,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:29,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:29,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:29,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:29,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:29,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:29,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 560 transitions, 9700 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:29,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:29,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:29,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:31,751 INFO L124 PetriNetUnfolderBase]: 4527/7415 cut-off events. [2024-06-21 22:16:31,751 INFO L125 PetriNetUnfolderBase]: For 891530/891530 co-relation queries the response was YES. [2024-06-21 22:16:31,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81755 conditions, 7415 events. 4527/7415 cut-off events. For 891530/891530 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 50140 event pairs, 1674 based on Foata normal form. 2/7416 useless extension candidates. Maximal degree in co-relation 81577. Up to 7104 conditions per place. [2024-06-21 22:16:31,882 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 558 selfloop transitions, 17 changer transitions 0/580 dead transitions. [2024-06-21 22:16:31,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 580 transitions, 11016 flow [2024-06-21 22:16:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:16:31,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:16:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-21 22:16:31,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-21 22:16:31,884 INFO L175 Difference]: Start difference. First operand has 380 places, 560 transitions, 9700 flow. Second operand 8 states and 124 transitions. [2024-06-21 22:16:31,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 580 transitions, 11016 flow [2024-06-21 22:16:34,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 580 transitions, 10969 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 22:16:34,267 INFO L231 Difference]: Finished difference. Result has 381 places, 562 transitions, 9788 flow [2024-06-21 22:16:34,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9653, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9788, PETRI_PLACES=381, PETRI_TRANSITIONS=562} [2024-06-21 22:16:34,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-21 22:16:34,267 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 562 transitions, 9788 flow [2024-06-21 22:16:34,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:34,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:34,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:34,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 22:16:34,268 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:16:34,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:34,268 INFO L85 PathProgramCache]: Analyzing trace with hash -245861898, now seen corresponding path program 2 times [2024-06-21 22:16:34,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:34,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475552065] [2024-06-21 22:16:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:34,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:37,651 INFO 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 22:16:37,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:37,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475552065] [2024-06-21 22:16:37,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475552065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:37,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:37,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:37,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026838974] [2024-06-21 22:16:37,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:37,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:37,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:37,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:37,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:37,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:37,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 562 transitions, 9788 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:37,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:37,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:37,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:40,295 INFO L124 PetriNetUnfolderBase]: 4556/7461 cut-off events. [2024-06-21 22:16:40,295 INFO L125 PetriNetUnfolderBase]: For 918136/918136 co-relation queries the response was YES. [2024-06-21 22:16:40,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82971 conditions, 7461 events. 4556/7461 cut-off events. For 918136/918136 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 50478 event pairs, 1675 based on Foata normal form. 2/7462 useless extension candidates. Maximal degree in co-relation 82792. Up to 7077 conditions per place. [2024-06-21 22:16:40,417 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 532 selfloop transitions, 55 changer transitions 0/592 dead transitions. [2024-06-21 22:16:40,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 592 transitions, 11626 flow [2024-06-21 22:16:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:16:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:16:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 22:16:40,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-21 22:16:40,419 INFO L175 Difference]: Start difference. First operand has 381 places, 562 transitions, 9788 flow. Second operand 9 states and 146 transitions. [2024-06-21 22:16:40,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 592 transitions, 11626 flow [2024-06-21 22:16:42,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 592 transitions, 11507 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 22:16:42,867 INFO L231 Difference]: Finished difference. Result has 385 places, 572 transitions, 10256 flow [2024-06-21 22:16:42,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9669, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10256, PETRI_PLACES=385, PETRI_TRANSITIONS=572} [2024-06-21 22:16:42,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-21 22:16:42,868 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 572 transitions, 10256 flow [2024-06-21 22:16:42,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:42,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:42,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:42,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 22:16:42,869 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:16:42,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:42,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1892102192, now seen corresponding path program 3 times [2024-06-21 22:16:42,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:42,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041076883] [2024-06-21 22:16:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:42,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:16:45,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:45,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041076883] [2024-06-21 22:16:45,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041076883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:45,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:45,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:45,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328472386] [2024-06-21 22:16:45,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:45,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:45,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:45,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:45,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:45,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:45,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 572 transitions, 10256 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:45,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:45,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:45,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:48,246 INFO L124 PetriNetUnfolderBase]: 4551/7456 cut-off events. [2024-06-21 22:16:48,247 INFO L125 PetriNetUnfolderBase]: For 927790/927790 co-relation queries the response was YES. [2024-06-21 22:16:48,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83167 conditions, 7456 events. 4551/7456 cut-off events. For 927790/927790 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 50487 event pairs, 1671 based on Foata normal form. 2/7457 useless extension candidates. Maximal degree in co-relation 82986. Up to 7142 conditions per place. [2024-06-21 22:16:48,380 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 564 selfloop transitions, 18 changer transitions 0/587 dead transitions. [2024-06-21 22:16:48,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 587 transitions, 11522 flow [2024-06-21 22:16:48,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:16:48,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:16:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 22:16:48,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 22:16:48,381 INFO L175 Difference]: Start difference. First operand has 385 places, 572 transitions, 10256 flow. Second operand 8 states and 120 transitions. [2024-06-21 22:16:48,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 587 transitions, 11522 flow [2024-06-21 22:16:51,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 587 transitions, 11366 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-21 22:16:51,187 INFO L231 Difference]: Finished difference. Result has 387 places, 573 transitions, 10203 flow [2024-06-21 22:16:51,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10100, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10203, PETRI_PLACES=387, PETRI_TRANSITIONS=573} [2024-06-21 22:16:51,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-21 22:16:51,188 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 573 transitions, 10203 flow [2024-06-21 22:16:51,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:51,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:51,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:51,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 22:16:51,188 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:16:51,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:51,189 INFO L85 PathProgramCache]: Analyzing trace with hash 793285750, now seen corresponding path program 4 times [2024-06-21 22:16:51,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:51,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637571578] [2024-06-21 22:16:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:51,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:16:53,899 INFO 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 22:16:53,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:16:53,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637571578] [2024-06-21 22:16:53,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637571578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:16:53,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:16:53,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:16:53,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405177319] [2024-06-21 22:16:53,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:16:53,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:16:53,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:16:53,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:16:53,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:16:53,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:16:53,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 573 transitions, 10203 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:53,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:16:53,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:16:53,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:16:56,645 INFO L124 PetriNetUnfolderBase]: 4546/7447 cut-off events. [2024-06-21 22:16:56,645 INFO L125 PetriNetUnfolderBase]: For 930685/930685 co-relation queries the response was YES. [2024-06-21 22:16:56,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82869 conditions, 7447 events. 4546/7447 cut-off events. For 930685/930685 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 50422 event pairs, 1679 based on Foata normal form. 2/7448 useless extension candidates. Maximal degree in co-relation 82687. Up to 7140 conditions per place. [2024-06-21 22:16:56,767 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 563 selfloop transitions, 18 changer transitions 0/586 dead transitions. [2024-06-21 22:16:56,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 586 transitions, 11405 flow [2024-06-21 22:16:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:16:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:16:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 22:16:56,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-21 22:16:56,769 INFO L175 Difference]: Start difference. First operand has 387 places, 573 transitions, 10203 flow. Second operand 8 states and 120 transitions. [2024-06-21 22:16:56,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 586 transitions, 11405 flow [2024-06-21 22:16:59,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 586 transitions, 11292 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 22:16:59,096 INFO L231 Difference]: Finished difference. Result has 389 places, 573 transitions, 10131 flow [2024-06-21 22:16:59,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10090, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10131, PETRI_PLACES=389, PETRI_TRANSITIONS=573} [2024-06-21 22:16:59,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-21 22:16:59,097 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 573 transitions, 10131 flow [2024-06-21 22:16:59,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:16:59,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:16:59,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:16:59,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 22:16:59,097 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:16:59,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:16:59,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1891835282, now seen corresponding path program 5 times [2024-06-21 22:16:59,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:16:59,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352739603] [2024-06-21 22:16:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:16:59,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:16:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:17:01,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:01,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352739603] [2024-06-21 22:17:01,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352739603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:01,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:01,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:17:01,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116714974] [2024-06-21 22:17:01,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:01,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:17:01,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:01,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:17:01,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:17:01,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:01,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 573 transitions, 10131 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:01,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:01,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:01,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:04,573 INFO L124 PetriNetUnfolderBase]: 4541/7436 cut-off events. [2024-06-21 22:17:04,573 INFO L125 PetriNetUnfolderBase]: For 934342/934342 co-relation queries the response was YES. [2024-06-21 22:17:04,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82559 conditions, 7436 events. 4541/7436 cut-off events. For 934342/934342 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 50225 event pairs, 1678 based on Foata normal form. 2/7437 useless extension candidates. Maximal degree in co-relation 82376. Up to 7121 conditions per place. [2024-06-21 22:17:04,685 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 556 selfloop transitions, 25 changer transitions 0/586 dead transitions. [2024-06-21 22:17:04,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 586 transitions, 11333 flow [2024-06-21 22:17:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:17:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:17:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 22:17:04,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-21 22:17:04,687 INFO L175 Difference]: Start difference. First operand has 389 places, 573 transitions, 10131 flow. Second operand 8 states and 121 transitions. [2024-06-21 22:17:04,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 586 transitions, 11333 flow [2024-06-21 22:17:07,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 586 transitions, 11225 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 22:17:07,078 INFO L231 Difference]: Finished difference. Result has 391 places, 573 transitions, 10081 flow [2024-06-21 22:17:07,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10023, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10081, PETRI_PLACES=391, PETRI_TRANSITIONS=573} [2024-06-21 22:17:07,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-21 22:17:07,078 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 573 transitions, 10081 flow [2024-06-21 22:17:07,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:07,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:07,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:07,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 22:17:07,079 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:17:07,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash 94228926, now seen corresponding path program 1 times [2024-06-21 22:17:07,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:07,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129709317] [2024-06-21 22:17:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:07,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:09,722 INFO 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 22:17:09,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:09,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129709317] [2024-06-21 22:17:09,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129709317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:09,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:09,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:17:09,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45607193] [2024-06-21 22:17:09,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:09,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:17:09,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:09,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:17:09,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:17:09,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:09,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 573 transitions, 10081 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:09,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:09,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:09,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:12,602 INFO L124 PetriNetUnfolderBase]: 4567/7469 cut-off events. [2024-06-21 22:17:12,603 INFO L125 PetriNetUnfolderBase]: For 952664/952664 co-relation queries the response was YES. [2024-06-21 22:17:12,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83222 conditions, 7469 events. 4567/7469 cut-off events. For 952664/952664 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 50359 event pairs, 1014 based on Foata normal form. 2/7471 useless extension candidates. Maximal degree in co-relation 83038. Up to 7001 conditions per place. [2024-06-21 22:17:12,714 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 560 selfloop transitions, 54 changer transitions 0/619 dead transitions. [2024-06-21 22:17:12,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 619 transitions, 11810 flow [2024-06-21 22:17:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:17:12,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:17:12,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:17:12,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 22:17:12,715 INFO L175 Difference]: Start difference. First operand has 391 places, 573 transitions, 10081 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:17:12,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 619 transitions, 11810 flow [2024-06-21 22:17:15,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 619 transitions, 11683 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 22:17:15,024 INFO L231 Difference]: Finished difference. Result has 393 places, 580 transitions, 10271 flow [2024-06-21 22:17:15,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9956, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10271, PETRI_PLACES=393, PETRI_TRANSITIONS=580} [2024-06-21 22:17:15,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-21 22:17:15,025 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 580 transitions, 10271 flow [2024-06-21 22:17:15,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:15,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:15,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:15,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 22:17:15,025 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:17:15,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:15,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1011338314, now seen corresponding path program 2 times [2024-06-21 22:17:15,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:15,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079394427] [2024-06-21 22:17:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:15,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:17:17,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:17,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079394427] [2024-06-21 22:17:17,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079394427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:17,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:17,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:17:17,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816161163] [2024-06-21 22:17:17,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:17,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:17:17,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:17,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:17:17,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:17:17,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:17,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 580 transitions, 10271 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:17,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:17,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:17,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:20,465 INFO L124 PetriNetUnfolderBase]: 4580/7488 cut-off events. [2024-06-21 22:17:20,465 INFO L125 PetriNetUnfolderBase]: For 952127/952127 co-relation queries the response was YES. [2024-06-21 22:17:20,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83556 conditions, 7488 events. 4580/7488 cut-off events. For 952127/952127 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 50367 event pairs, 1039 based on Foata normal form. 2/7490 useless extension candidates. Maximal degree in co-relation 83372. Up to 7092 conditions per place. [2024-06-21 22:17:20,575 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 560 selfloop transitions, 51 changer transitions 0/616 dead transitions. [2024-06-21 22:17:20,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 616 transitions, 11727 flow [2024-06-21 22:17:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:17:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:17:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 22:17:20,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 22:17:20,576 INFO L175 Difference]: Start difference. First operand has 393 places, 580 transitions, 10271 flow. Second operand 9 states and 157 transitions. [2024-06-21 22:17:20,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 616 transitions, 11727 flow [2024-06-21 22:17:23,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 616 transitions, 11582 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-21 22:17:23,201 INFO L231 Difference]: Finished difference. Result has 399 places, 585 transitions, 10373 flow [2024-06-21 22:17:23,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10154, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10373, PETRI_PLACES=399, PETRI_TRANSITIONS=585} [2024-06-21 22:17:23,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-21 22:17:23,202 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 585 transitions, 10373 flow [2024-06-21 22:17:23,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:23,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:23,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:23,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 22:17:23,202 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:17:23,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:23,203 INFO L85 PathProgramCache]: Analyzing trace with hash -206720390, now seen corresponding path program 3 times [2024-06-21 22:17:23,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:23,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331015433] [2024-06-21 22:17:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:23,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:17:25,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:25,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331015433] [2024-06-21 22:17:25,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331015433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:25,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:25,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:17:25,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495142344] [2024-06-21 22:17:25,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:25,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:17:25,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:25,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:17:25,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:17:25,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:25,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 585 transitions, 10373 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:25,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:25,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:25,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:28,420 INFO L124 PetriNetUnfolderBase]: 4575/7474 cut-off events. [2024-06-21 22:17:28,420 INFO L125 PetriNetUnfolderBase]: For 956274/956274 co-relation queries the response was YES. [2024-06-21 22:17:28,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83356 conditions, 7474 events. 4575/7474 cut-off events. For 956274/956274 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 50212 event pairs, 968 based on Foata normal form. 2/7475 useless extension candidates. Maximal degree in co-relation 83170. Up to 7085 conditions per place. [2024-06-21 22:17:28,530 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 554 selfloop transitions, 52 changer transitions 0/611 dead transitions. [2024-06-21 22:17:28,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 611 transitions, 11669 flow [2024-06-21 22:17:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:17:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:17:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 22:17:28,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 22:17:28,544 INFO L175 Difference]: Start difference. First operand has 399 places, 585 transitions, 10373 flow. Second operand 9 states and 150 transitions. [2024-06-21 22:17:28,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 611 transitions, 11669 flow [2024-06-21 22:17:31,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 611 transitions, 11504 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 22:17:31,021 INFO L231 Difference]: Finished difference. Result has 402 places, 585 transitions, 10317 flow [2024-06-21 22:17:31,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10208, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10317, PETRI_PLACES=402, PETRI_TRANSITIONS=585} [2024-06-21 22:17:31,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-21 22:17:31,022 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 585 transitions, 10317 flow [2024-06-21 22:17:31,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:31,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:31,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:31,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 22:17:31,023 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:17:31,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:31,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1323801116, now seen corresponding path program 1 times [2024-06-21 22:17:31,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:31,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756615394] [2024-06-21 22:17:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:31,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:34,105 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 22:17:34,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:34,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756615394] [2024-06-21 22:17:34,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756615394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:34,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:34,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:17:34,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33507267] [2024-06-21 22:17:34,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:34,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:17:34,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:34,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:17:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:17:34,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:34,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 585 transitions, 10317 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:34,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:34,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:34,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:36,723 INFO L124 PetriNetUnfolderBase]: 4580/7494 cut-off events. [2024-06-21 22:17:36,724 INFO L125 PetriNetUnfolderBase]: For 965782/965782 co-relation queries the response was YES. [2024-06-21 22:17:36,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83565 conditions, 7494 events. 4580/7494 cut-off events. For 965782/965782 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 50533 event pairs, 1190 based on Foata normal form. 1/7495 useless extension candidates. Maximal degree in co-relation 83378. Up to 7130 conditions per place. [2024-06-21 22:17:36,844 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 577 selfloop transitions, 35 changer transitions 0/617 dead transitions. [2024-06-21 22:17:36,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 617 transitions, 11833 flow [2024-06-21 22:17:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:17:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:17:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 22:17:36,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 22:17:36,846 INFO L175 Difference]: Start difference. First operand has 402 places, 585 transitions, 10317 flow. Second operand 9 states and 151 transitions. [2024-06-21 22:17:36,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 617 transitions, 11833 flow [2024-06-21 22:17:39,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 617 transitions, 11700 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 22:17:39,568 INFO L231 Difference]: Finished difference. Result has 403 places, 588 transitions, 10456 flow [2024-06-21 22:17:39,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10184, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10456, PETRI_PLACES=403, PETRI_TRANSITIONS=588} [2024-06-21 22:17:39,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-21 22:17:39,569 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 588 transitions, 10456 flow [2024-06-21 22:17:39,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:39,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:39,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:39,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 22:17:39,569 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:17:39,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:39,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1500879068, now seen corresponding path program 4 times [2024-06-21 22:17:39,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:39,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710411819] [2024-06-21 22:17:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:39,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:41,717 INFO 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 22:17:41,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:41,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710411819] [2024-06-21 22:17:41,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710411819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:41,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:41,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:17:41,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959011615] [2024-06-21 22:17:41,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:41,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:17:41,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:41,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:17:41,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:17:41,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:41,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 588 transitions, 10456 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:41,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:41,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:41,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:44,508 INFO L124 PetriNetUnfolderBase]: 4622/7557 cut-off events. [2024-06-21 22:17:44,509 INFO L125 PetriNetUnfolderBase]: For 1004438/1004438 co-relation queries the response was YES. [2024-06-21 22:17:44,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84799 conditions, 7557 events. 4622/7557 cut-off events. For 1004438/1004438 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 51050 event pairs, 1139 based on Foata normal form. 2/7559 useless extension candidates. Maximal degree in co-relation 84611. Up to 7070 conditions per place. [2024-06-21 22:17:44,625 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 569 selfloop transitions, 66 changer transitions 0/640 dead transitions. [2024-06-21 22:17:44,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 640 transitions, 12294 flow [2024-06-21 22:17:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:17:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:17:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 22:17:44,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 22:17:44,626 INFO L175 Difference]: Start difference. First operand has 403 places, 588 transitions, 10456 flow. Second operand 9 states and 165 transitions. [2024-06-21 22:17:44,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 640 transitions, 12294 flow [2024-06-21 22:17:47,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 640 transitions, 12052 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-06-21 22:17:47,299 INFO L231 Difference]: Finished difference. Result has 407 places, 599 transitions, 10624 flow [2024-06-21 22:17:47,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10214, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10624, PETRI_PLACES=407, PETRI_TRANSITIONS=599} [2024-06-21 22:17:47,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 364 predicate places. [2024-06-21 22:17:47,300 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 599 transitions, 10624 flow [2024-06-21 22:17:47,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:47,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:47,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:47,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 22:17:47,300 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:17:47,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:47,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1160645446, now seen corresponding path program 5 times [2024-06-21 22:17:47,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:47,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217437183] [2024-06-21 22:17:47,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:47,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:49,795 INFO 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 22:17:49,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:49,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217437183] [2024-06-21 22:17:49,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217437183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:49,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:49,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:17:49,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359425021] [2024-06-21 22:17:49,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:49,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:17:49,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:49,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:17:49,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:17:49,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:49,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 599 transitions, 10624 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:49,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:49,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:49,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:17:52,665 INFO L124 PetriNetUnfolderBase]: 4617/7550 cut-off events. [2024-06-21 22:17:52,665 INFO L125 PetriNetUnfolderBase]: For 1006532/1006532 co-relation queries the response was YES. [2024-06-21 22:17:52,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84787 conditions, 7550 events. 4617/7550 cut-off events. For 1006532/1006532 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 50986 event pairs, 1168 based on Foata normal form. 2/7552 useless extension candidates. Maximal degree in co-relation 84597. Up to 7140 conditions per place. [2024-06-21 22:17:52,781 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 569 selfloop transitions, 58 changer transitions 0/632 dead transitions. [2024-06-21 22:17:52,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 632 transitions, 11990 flow [2024-06-21 22:17:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:17:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:17:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 22:17:52,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 22:17:52,782 INFO L175 Difference]: Start difference. First operand has 407 places, 599 transitions, 10624 flow. Second operand 9 states and 156 transitions. [2024-06-21 22:17:52,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 632 transitions, 11990 flow [2024-06-21 22:17:55,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 632 transitions, 11807 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-21 22:17:55,595 INFO L231 Difference]: Finished difference. Result has 411 places, 599 transitions, 10565 flow [2024-06-21 22:17:55,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10441, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10565, PETRI_PLACES=411, PETRI_TRANSITIONS=599} [2024-06-21 22:17:55,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-21 22:17:55,596 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 599 transitions, 10565 flow [2024-06-21 22:17:55,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:55,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:17:55,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:17:55,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 22:17:55,596 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:17:55,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:17:55,597 INFO L85 PathProgramCache]: Analyzing trace with hash -545062300, now seen corresponding path program 6 times [2024-06-21 22:17:55,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:17:55,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968913763] [2024-06-21 22:17:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:17:55,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:17:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:17:57,471 INFO 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 22:17:57,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:17:57,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968913763] [2024-06-21 22:17:57,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968913763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:17:57,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:17:57,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:17:57,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948245944] [2024-06-21 22:17:57,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:17:57,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:17:57,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:17:57,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:17:57,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:17:57,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:17:57,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 599 transitions, 10565 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:17:57,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:17:57,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:17:57,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:00,103 INFO L124 PetriNetUnfolderBase]: 4641/7588 cut-off events. [2024-06-21 22:18:00,103 INFO L125 PetriNetUnfolderBase]: For 1018401/1018401 co-relation queries the response was YES. [2024-06-21 22:18:00,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85081 conditions, 7588 events. 4641/7588 cut-off events. For 1018401/1018401 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 50934 event pairs, 877 based on Foata normal form. 2/7590 useless extension candidates. Maximal degree in co-relation 84891. Up to 6947 conditions per place. [2024-06-21 22:18:00,228 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 559 selfloop transitions, 83 changer transitions 0/647 dead transitions. [2024-06-21 22:18:00,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 647 transitions, 12381 flow [2024-06-21 22:18:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:18:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:18:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 22:18:00,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:18:00,229 INFO L175 Difference]: Start difference. First operand has 411 places, 599 transitions, 10565 flow. Second operand 9 states and 162 transitions. [2024-06-21 22:18:00,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 647 transitions, 12381 flow [2024-06-21 22:18:03,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 647 transitions, 12250 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 22:18:03,161 INFO L231 Difference]: Finished difference. Result has 412 places, 607 transitions, 10815 flow [2024-06-21 22:18:03,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10434, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10815, PETRI_PLACES=412, PETRI_TRANSITIONS=607} [2024-06-21 22:18:03,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-21 22:18:03,161 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 607 transitions, 10815 flow [2024-06-21 22:18:03,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:03,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:18:03,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:18:03,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 22:18:03,162 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:18:03,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:18:03,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1007846082, now seen corresponding path program 1 times [2024-06-21 22:18:03,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:18:03,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298988499] [2024-06-21 22:18:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:18:03,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:18:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:18:05,232 INFO 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 22:18:05,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:18:05,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298988499] [2024-06-21 22:18:05,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298988499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:18:05,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:18:05,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:18:05,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491215779] [2024-06-21 22:18:05,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:18:05,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:18:05,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:18:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:18:05,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:18:05,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:18:05,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 607 transitions, 10815 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:05,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:18:05,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:18:05,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:08,090 INFO L124 PetriNetUnfolderBase]: 4662/7610 cut-off events. [2024-06-21 22:18:08,091 INFO L125 PetriNetUnfolderBase]: For 1048240/1048240 co-relation queries the response was YES. [2024-06-21 22:18:08,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86202 conditions, 7610 events. 4662/7610 cut-off events. For 1048240/1048240 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 51348 event pairs, 1200 based on Foata normal form. 2/7612 useless extension candidates. Maximal degree in co-relation 86011. Up to 7192 conditions per place. [2024-06-21 22:18:08,224 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 595 selfloop transitions, 52 changer transitions 0/652 dead transitions. [2024-06-21 22:18:08,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 652 transitions, 12677 flow [2024-06-21 22:18:08,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:18:08,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:18:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 22:18:08,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 22:18:08,238 INFO L175 Difference]: Start difference. First operand has 412 places, 607 transitions, 10815 flow. Second operand 10 states and 176 transitions. [2024-06-21 22:18:08,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 652 transitions, 12677 flow [2024-06-21 22:18:11,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 652 transitions, 12508 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 22:18:11,429 INFO L231 Difference]: Finished difference. Result has 418 places, 612 transitions, 11004 flow [2024-06-21 22:18:11,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10654, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11004, PETRI_PLACES=418, PETRI_TRANSITIONS=612} [2024-06-21 22:18:11,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-21 22:18:11,430 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 612 transitions, 11004 flow [2024-06-21 22:18:11,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:11,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:18:11,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:18:11,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 22:18:11,430 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:18:11,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:18:11,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1007906532, now seen corresponding path program 2 times [2024-06-21 22:18:11,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:18:11,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956650290] [2024-06-21 22:18:11,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:18:11,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:18:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:18:14,937 INFO 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 22:18:14,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:18:14,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956650290] [2024-06-21 22:18:14,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956650290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:18:14,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:18:14,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:18:14,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610725142] [2024-06-21 22:18:14,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:18:14,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:18:14,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:18:14,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:18:14,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:18:14,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:18:14,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 612 transitions, 11004 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:14,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:18:14,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:18:14,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:17,693 INFO L124 PetriNetUnfolderBase]: 4721/7692 cut-off events. [2024-06-21 22:18:17,693 INFO L125 PetriNetUnfolderBase]: For 1114855/1114855 co-relation queries the response was YES. [2024-06-21 22:18:17,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87741 conditions, 7692 events. 4721/7692 cut-off events. For 1114855/1114855 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 51790 event pairs, 986 based on Foata normal form. 13/7704 useless extension candidates. Maximal degree in co-relation 87547. Up to 7063 conditions per place. [2024-06-21 22:18:17,822 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 527 selfloop transitions, 131 changer transitions 0/663 dead transitions. [2024-06-21 22:18:17,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 663 transitions, 13029 flow [2024-06-21 22:18:17,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:18:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:18:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 22:18:17,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 22:18:17,824 INFO L175 Difference]: Start difference. First operand has 418 places, 612 transitions, 11004 flow. Second operand 10 states and 181 transitions. [2024-06-21 22:18:17,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 663 transitions, 13029 flow [2024-06-21 22:18:20,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 663 transitions, 12817 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-21 22:18:20,816 INFO L231 Difference]: Finished difference. Result has 426 places, 625 transitions, 11625 flow [2024-06-21 22:18:20,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10832, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11625, PETRI_PLACES=426, PETRI_TRANSITIONS=625} [2024-06-21 22:18:20,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-21 22:18:20,817 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 625 transitions, 11625 flow [2024-06-21 22:18:20,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:20,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:18:20,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:18:20,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 22:18:20,817 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:18:20,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:18:20,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2140898294, now seen corresponding path program 1 times [2024-06-21 22:18:20,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:18:20,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344850816] [2024-06-21 22:18:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:18:20,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:18:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:18:23,910 INFO 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 22:18:23,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:18:23,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344850816] [2024-06-21 22:18:23,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344850816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:18:23,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:18:23,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:18:23,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262659284] [2024-06-21 22:18:23,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:18:23,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:18:23,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:18:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:18:23,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:18:23,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:18:23,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 625 transitions, 11625 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:23,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:18:23,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:18:23,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:26,559 INFO L124 PetriNetUnfolderBase]: 4803/7800 cut-off events. [2024-06-21 22:18:26,560 INFO L125 PetriNetUnfolderBase]: For 1170232/1170232 co-relation queries the response was YES. [2024-06-21 22:18:26,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91389 conditions, 7800 events. 4803/7800 cut-off events. For 1170232/1170232 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 52450 event pairs, 986 based on Foata normal form. 6/7805 useless extension candidates. Maximal degree in co-relation 91191. Up to 7085 conditions per place. [2024-06-21 22:18:26,692 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 532 selfloop transitions, 144 changer transitions 0/681 dead transitions. [2024-06-21 22:18:26,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 681 transitions, 14095 flow [2024-06-21 22:18:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:18:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:18:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 22:18:26,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-21 22:18:26,693 INFO L175 Difference]: Start difference. First operand has 426 places, 625 transitions, 11625 flow. Second operand 10 states and 187 transitions. [2024-06-21 22:18:26,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 681 transitions, 14095 flow [2024-06-21 22:18:29,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 681 transitions, 13823 flow, removed 90 selfloop flow, removed 5 redundant places. [2024-06-21 22:18:29,969 INFO L231 Difference]: Finished difference. Result has 432 places, 638 transitions, 12260 flow [2024-06-21 22:18:29,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11353, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12260, PETRI_PLACES=432, PETRI_TRANSITIONS=638} [2024-06-21 22:18:29,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-21 22:18:29,969 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 638 transitions, 12260 flow [2024-06-21 22:18:29,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:29,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:18:29,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:18:29,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 22:18:29,970 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:18:29,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:18:29,970 INFO L85 PathProgramCache]: Analyzing trace with hash 2143694804, now seen corresponding path program 2 times [2024-06-21 22:18:29,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:18:29,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472597633] [2024-06-21 22:18:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:18:29,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:18:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:18:33,004 INFO 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 22:18:33,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:18:33,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472597633] [2024-06-21 22:18:33,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472597633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:18:33,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:18:33,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:18:33,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611395935] [2024-06-21 22:18:33,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:18:33,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:18:33,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:18:33,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:18:33,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:18:33,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:18:33,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 638 transitions, 12260 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:33,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:18:33,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:18:33,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:36,122 INFO L124 PetriNetUnfolderBase]: 4823/7847 cut-off events. [2024-06-21 22:18:36,123 INFO L125 PetriNetUnfolderBase]: For 1201792/1201792 co-relation queries the response was YES. [2024-06-21 22:18:36,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93511 conditions, 7847 events. 4823/7847 cut-off events. For 1201792/1201792 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 52908 event pairs, 1211 based on Foata normal form. 4/7851 useless extension candidates. Maximal degree in co-relation 93310. Up to 7448 conditions per place. [2024-06-21 22:18:36,263 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 626 selfloop transitions, 44 changer transitions 0/675 dead transitions. [2024-06-21 22:18:36,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 675 transitions, 13968 flow [2024-06-21 22:18:36,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:18:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:18:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-21 22:18:36,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-21 22:18:36,264 INFO L175 Difference]: Start difference. First operand has 432 places, 638 transitions, 12260 flow. Second operand 11 states and 180 transitions. [2024-06-21 22:18:36,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 675 transitions, 13968 flow [2024-06-21 22:18:40,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 675 transitions, 13536 flow, removed 146 selfloop flow, removed 6 redundant places. [2024-06-21 22:18:40,213 INFO L231 Difference]: Finished difference. Result has 437 places, 642 transitions, 12166 flow [2024-06-21 22:18:40,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11828, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12166, PETRI_PLACES=437, PETRI_TRANSITIONS=642} [2024-06-21 22:18:40,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-21 22:18:40,213 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 642 transitions, 12166 flow [2024-06-21 22:18:40,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:40,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:18:40,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:18:40,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 22:18:40,214 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:18:40,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:18:40,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1323808060, now seen corresponding path program 3 times [2024-06-21 22:18:40,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:18:40,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241182594] [2024-06-21 22:18:40,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:18:40,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:18:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:18:43,822 INFO 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 22:18:43,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:18:43,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241182594] [2024-06-21 22:18:43,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241182594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:18:43,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:18:43,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:18:43,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968245734] [2024-06-21 22:18:43,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:18:43,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:18:43,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:18:43,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:18:43,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:18:43,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:18:43,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 642 transitions, 12166 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:43,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:18:43,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:18:43,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:46,592 INFO L124 PetriNetUnfolderBase]: 4867/7919 cut-off events. [2024-06-21 22:18:46,592 INFO L125 PetriNetUnfolderBase]: For 1268397/1268397 co-relation queries the response was YES. [2024-06-21 22:18:46,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94840 conditions, 7919 events. 4867/7919 cut-off events. For 1268397/1268397 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 53450 event pairs, 1221 based on Foata normal form. 10/7929 useless extension candidates. Maximal degree in co-relation 94637. Up to 7500 conditions per place. [2024-06-21 22:18:46,729 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 636 selfloop transitions, 39 changer transitions 0/680 dead transitions. [2024-06-21 22:18:46,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 680 transitions, 13962 flow [2024-06-21 22:18:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:18:46,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:18:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 22:18:46,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 22:18:46,731 INFO L175 Difference]: Start difference. First operand has 437 places, 642 transitions, 12166 flow. Second operand 10 states and 168 transitions. [2024-06-21 22:18:46,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 680 transitions, 13962 flow [2024-06-21 22:18:50,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 680 transitions, 13673 flow, removed 106 selfloop flow, removed 8 redundant places. [2024-06-21 22:18:50,473 INFO L231 Difference]: Finished difference. Result has 439 places, 645 transitions, 12122 flow [2024-06-21 22:18:50,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11877, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12122, PETRI_PLACES=439, PETRI_TRANSITIONS=645} [2024-06-21 22:18:50,473 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-21 22:18:50,474 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 645 transitions, 12122 flow [2024-06-21 22:18:50,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:50,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:18:50,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:18:50,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 22:18:50,474 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:18:50,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:18:50,475 INFO L85 PathProgramCache]: Analyzing trace with hash 665143462, now seen corresponding path program 3 times [2024-06-21 22:18:50,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:18:50,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923825817] [2024-06-21 22:18:50,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:18:50,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:18:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:18:53,537 INFO 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 22:18:53,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:18:53,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923825817] [2024-06-21 22:18:53,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923825817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:18:53,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:18:53,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:18:53,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614911738] [2024-06-21 22:18:53,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:18:53,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:18:53,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:18:53,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:18:53,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:18:53,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:18:53,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 645 transitions, 12122 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:18:53,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:18:53,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:18:53,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:18:56,760 INFO L124 PetriNetUnfolderBase]: 4897/7942 cut-off events. [2024-06-21 22:18:56,760 INFO L125 PetriNetUnfolderBase]: For 1270099/1270099 co-relation queries the response was YES. [2024-06-21 22:18:56,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95565 conditions, 7942 events. 4897/7942 cut-off events. For 1270099/1270099 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 53426 event pairs, 991 based on Foata normal form. 6/7947 useless extension candidates. Maximal degree in co-relation 95361. Up to 7430 conditions per place. [2024-06-21 22:18:56,886 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 589 selfloop transitions, 92 changer transitions 0/686 dead transitions. [2024-06-21 22:18:56,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 686 transitions, 14270 flow [2024-06-21 22:18:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:18:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:18:56,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 22:18:56,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-21 22:18:56,887 INFO L175 Difference]: Start difference. First operand has 439 places, 645 transitions, 12122 flow. Second operand 10 states and 172 transitions. [2024-06-21 22:18:56,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 686 transitions, 14270 flow [2024-06-21 22:19:00,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 686 transitions, 14172 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 22:19:00,352 INFO L231 Difference]: Finished difference. Result has 442 places, 653 transitions, 12680 flow [2024-06-21 22:19:00,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12024, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12680, PETRI_PLACES=442, PETRI_TRANSITIONS=653} [2024-06-21 22:19:00,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-21 22:19:00,353 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 653 transitions, 12680 flow [2024-06-21 22:19:00,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:00,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:00,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:00,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 22:19:00,353 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:19:00,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:00,354 INFO L85 PathProgramCache]: Analyzing trace with hash 658714372, now seen corresponding path program 4 times [2024-06-21 22:19:00,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:00,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946414483] [2024-06-21 22:19:00,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:00,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:19:03,153 INFO 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 22:19:03,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:19:03,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946414483] [2024-06-21 22:19:03,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946414483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:19:03,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:19:03,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:19:03,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074764176] [2024-06-21 22:19:03,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:19:03,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:19:03,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:19:03,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:19:03,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:19:03,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:19:03,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 653 transitions, 12680 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:03,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:19:03,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:19:03,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:19:06,259 INFO L124 PetriNetUnfolderBase]: 4917/7964 cut-off events. [2024-06-21 22:19:06,259 INFO L125 PetriNetUnfolderBase]: For 1299288/1299288 co-relation queries the response was YES. [2024-06-21 22:19:06,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97157 conditions, 7964 events. 4917/7964 cut-off events. For 1299288/1299288 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 53466 event pairs, 989 based on Foata normal form. 4/7967 useless extension candidates. Maximal degree in co-relation 96952. Up to 7430 conditions per place. [2024-06-21 22:19:06,386 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 593 selfloop transitions, 96 changer transitions 0/694 dead transitions. [2024-06-21 22:19:06,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 694 transitions, 14738 flow [2024-06-21 22:19:06,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:19:06,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:19:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 22:19:06,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 22:19:06,413 INFO L175 Difference]: Start difference. First operand has 442 places, 653 transitions, 12680 flow. Second operand 10 states and 175 transitions. [2024-06-21 22:19:06,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 694 transitions, 14738 flow [2024-06-21 22:19:10,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 694 transitions, 14188 flow, removed 189 selfloop flow, removed 8 redundant places. [2024-06-21 22:19:10,144 INFO L231 Difference]: Finished difference. Result has 444 places, 657 transitions, 12544 flow [2024-06-21 22:19:10,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12130, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12544, PETRI_PLACES=444, PETRI_TRANSITIONS=657} [2024-06-21 22:19:10,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-21 22:19:10,145 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 657 transitions, 12544 flow [2024-06-21 22:19:10,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:10,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:10,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:10,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 22:19:10,145 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:19:10,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:10,145 INFO L85 PathProgramCache]: Analyzing trace with hash 658709598, now seen corresponding path program 4 times [2024-06-21 22:19:10,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:10,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222119613] [2024-06-21 22:19:10,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:10,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:19:12,703 INFO 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 22:19:12,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:19:12,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222119613] [2024-06-21 22:19:12,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222119613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:19:12,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:19:12,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:19:12,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884151431] [2024-06-21 22:19:12,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:19:12,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:19:12,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:19:12,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:19:12,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:19:12,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:19:12,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 657 transitions, 12544 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:12,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:19:12,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:19:12,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:19:15,617 INFO L124 PetriNetUnfolderBase]: 4940/8011 cut-off events. [2024-06-21 22:19:15,618 INFO L125 PetriNetUnfolderBase]: For 1334860/1334860 co-relation queries the response was YES. [2024-06-21 22:19:15,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97145 conditions, 8011 events. 4940/8011 cut-off events. For 1334860/1334860 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 53904 event pairs, 994 based on Foata normal form. 10/8020 useless extension candidates. Maximal degree in co-relation 96939. Up to 7569 conditions per place. [2024-06-21 22:19:15,760 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 616 selfloop transitions, 67 changer transitions 0/688 dead transitions. [2024-06-21 22:19:15,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 688 transitions, 14194 flow [2024-06-21 22:19:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 22:19:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 22:19:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-21 22:19:15,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-21 22:19:15,761 INFO L175 Difference]: Start difference. First operand has 444 places, 657 transitions, 12544 flow. Second operand 10 states and 167 transitions. [2024-06-21 22:19:15,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 688 transitions, 14194 flow [2024-06-21 22:19:19,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 688 transitions, 13718 flow, removed 145 selfloop flow, removed 8 redundant places. [2024-06-21 22:19:19,775 INFO L231 Difference]: Finished difference. Result has 446 places, 658 transitions, 12264 flow [2024-06-21 22:19:19,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12068, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12264, PETRI_PLACES=446, PETRI_TRANSITIONS=658} [2024-06-21 22:19:19,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-21 22:19:19,787 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 658 transitions, 12264 flow [2024-06-21 22:19:19,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:19,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:19,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:19,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 22:19:19,787 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:19:19,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:19,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1291633470, now seen corresponding path program 5 times [2024-06-21 22:19:19,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:19,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696566825] [2024-06-21 22:19:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:19,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:19:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:19:22,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:19:22,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696566825] [2024-06-21 22:19:22,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696566825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:19:22,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:19:22,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:19:22,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235944353] [2024-06-21 22:19:22,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:19:22,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:19:22,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:19:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:19:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:19:22,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:19:22,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 658 transitions, 12264 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:22,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:19:22,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:19:22,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:19:25,442 INFO L124 PetriNetUnfolderBase]: 4928/7987 cut-off events. [2024-06-21 22:19:25,442 INFO L125 PetriNetUnfolderBase]: For 1288388/1288388 co-relation queries the response was YES. [2024-06-21 22:19:25,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95851 conditions, 7987 events. 4928/7987 cut-off events. For 1288388/1288388 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 53671 event pairs, 993 based on Foata normal form. 4/7990 useless extension candidates. Maximal degree in co-relation 95644. Up to 7456 conditions per place. [2024-06-21 22:19:25,581 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 594 selfloop transitions, 98 changer transitions 0/697 dead transitions. [2024-06-21 22:19:25,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 697 transitions, 14138 flow [2024-06-21 22:19:25,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 22:19:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 22:19:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 22:19:25,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:19:25,582 INFO L175 Difference]: Start difference. First operand has 446 places, 658 transitions, 12264 flow. Second operand 11 states and 187 transitions. [2024-06-21 22:19:25,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 697 transitions, 14138 flow [2024-06-21 22:19:29,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 697 transitions, 13885 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-21 22:19:29,603 INFO L231 Difference]: Finished difference. Result has 451 places, 658 transitions, 12222 flow [2024-06-21 22:19:29,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12011, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12222, PETRI_PLACES=451, PETRI_TRANSITIONS=658} [2024-06-21 22:19:29,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-21 22:19:29,604 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 658 transitions, 12222 flow [2024-06-21 22:19:29,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:29,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:29,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:29,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 22:19:29,604 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:19:29,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:29,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1714131522, now seen corresponding path program 7 times [2024-06-21 22:19:29,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:29,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590099775] [2024-06-21 22:19:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:29,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:19:32,044 INFO 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 22:19:32,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:19:32,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590099775] [2024-06-21 22:19:32,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590099775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:19:32,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:19:32,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:19:32,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934231855] [2024-06-21 22:19:32,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:19:32,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:19:32,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:19:32,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:19:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:19:32,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:19:32,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 658 transitions, 12222 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:32,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:19:32,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:19:32,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:19:35,249 INFO L124 PetriNetUnfolderBase]: 4936/8021 cut-off events. [2024-06-21 22:19:35,250 INFO L125 PetriNetUnfolderBase]: For 1286931/1286931 co-relation queries the response was YES. [2024-06-21 22:19:35,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95891 conditions, 8021 events. 4936/8021 cut-off events. For 1286931/1286931 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 53688 event pairs, 897 based on Foata normal form. 2/8023 useless extension candidates. Maximal degree in co-relation 95683. Up to 7376 conditions per place. [2024-06-21 22:19:35,391 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 601 selfloop transitions, 87 changer transitions 0/693 dead transitions. [2024-06-21 22:19:35,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 693 transitions, 13994 flow [2024-06-21 22:19:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:19:35,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:19:35,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 22:19:35,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:19:35,392 INFO L175 Difference]: Start difference. First operand has 451 places, 658 transitions, 12222 flow. Second operand 8 states and 144 transitions. [2024-06-21 22:19:35,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 693 transitions, 13994 flow [2024-06-21 22:19:39,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 693 transitions, 13729 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-21 22:19:39,138 INFO L231 Difference]: Finished difference. Result has 450 places, 660 transitions, 12216 flow [2024-06-21 22:19:39,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11959, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12216, PETRI_PLACES=450, PETRI_TRANSITIONS=660} [2024-06-21 22:19:39,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-21 22:19:39,138 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 660 transitions, 12216 flow [2024-06-21 22:19:39,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:39,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:39,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:39,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 22:19:39,139 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:19:39,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1028204910, now seen corresponding path program 8 times [2024-06-21 22:19:39,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:39,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780101136] [2024-06-21 22:19:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:39,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:19:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:19:41,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:19:41,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780101136] [2024-06-21 22:19:41,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780101136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:19:41,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:19:41,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:19:41,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550659963] [2024-06-21 22:19:41,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:19:41,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:19:41,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:19:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:19:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:19:41,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:19:41,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 660 transitions, 12216 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:41,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:19:41,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:19:41,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:19:44,898 INFO L124 PetriNetUnfolderBase]: 4949/8040 cut-off events. [2024-06-21 22:19:44,898 INFO L125 PetriNetUnfolderBase]: For 1286842/1286842 co-relation queries the response was YES. [2024-06-21 22:19:44,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96088 conditions, 8040 events. 4949/8040 cut-off events. For 1286842/1286842 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 54341 event pairs, 1190 based on Foata normal form. 2/8042 useless extension candidates. Maximal degree in co-relation 95879. Up to 7615 conditions per place. [2024-06-21 22:19:45,032 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 623 selfloop transitions, 64 changer transitions 0/692 dead transitions. [2024-06-21 22:19:45,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 692 transitions, 13824 flow [2024-06-21 22:19:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:19:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:19:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 22:19:45,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 22:19:45,034 INFO L175 Difference]: Start difference. First operand has 450 places, 660 transitions, 12216 flow. Second operand 8 states and 138 transitions. [2024-06-21 22:19:45,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 692 transitions, 13824 flow [2024-06-21 22:19:48,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 692 transitions, 13636 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 22:19:48,509 INFO L231 Difference]: Finished difference. Result has 451 places, 665 transitions, 12312 flow [2024-06-21 22:19:48,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12035, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12312, PETRI_PLACES=451, PETRI_TRANSITIONS=665} [2024-06-21 22:19:48,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-21 22:19:48,510 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 665 transitions, 12312 flow [2024-06-21 22:19:48,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:48,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:48,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:48,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 22:19:48,510 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:19:48,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:48,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2011356606, now seen corresponding path program 9 times [2024-06-21 22:19:48,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:48,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486487793] [2024-06-21 22:19:48,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:48,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:19:51,579 INFO 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 22:19:51,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:19:51,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486487793] [2024-06-21 22:19:51,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486487793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:19:51,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:19:51,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:19:51,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293666204] [2024-06-21 22:19:51,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:19:51,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:19:51,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:19:51,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:19:51,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:19:51,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:19:51,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 665 transitions, 12312 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:51,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:19:51,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:19:51,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:19:54,759 INFO L124 PetriNetUnfolderBase]: 5003/8115 cut-off events. [2024-06-21 22:19:54,759 INFO L125 PetriNetUnfolderBase]: For 1261415/1261415 co-relation queries the response was YES. [2024-06-21 22:19:54,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96634 conditions, 8115 events. 5003/8115 cut-off events. For 1261415/1261415 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 54631 event pairs, 1010 based on Foata normal form. 2/8115 useless extension candidates. Maximal degree in co-relation 96426. Up to 7689 conditions per place. [2024-06-21 22:19:54,893 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 627 selfloop transitions, 75 changer transitions 0/707 dead transitions. [2024-06-21 22:19:54,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 707 transitions, 14357 flow [2024-06-21 22:19:54,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:19:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:19:54,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 22:19:54,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 22:19:54,895 INFO L175 Difference]: Start difference. First operand has 451 places, 665 transitions, 12312 flow. Second operand 9 states and 142 transitions. [2024-06-21 22:19:54,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 707 transitions, 14357 flow [2024-06-21 22:19:58,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 707 transitions, 14210 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 22:19:58,466 INFO L231 Difference]: Finished difference. Result has 456 places, 689 transitions, 12966 flow [2024-06-21 22:19:58,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12185, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12966, PETRI_PLACES=456, PETRI_TRANSITIONS=689} [2024-06-21 22:19:58,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-21 22:19:58,466 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 689 transitions, 12966 flow [2024-06-21 22:19:58,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:19:58,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:19:58,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:19:58,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 22:19:58,467 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:19:58,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:19:58,467 INFO L85 PathProgramCache]: Analyzing trace with hash -742510030, now seen corresponding path program 2 times [2024-06-21 22:19:58,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:19:58,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404918471] [2024-06-21 22:19:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:19:58,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:19:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:20:01,501 INFO 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 22:20:01,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:20:01,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404918471] [2024-06-21 22:20:01,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404918471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:20:01,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:20:01,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:20:01,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658757081] [2024-06-21 22:20:01,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:20:01,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:20:01,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:20:01,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:20:01,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:20:01,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:20:01,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 689 transitions, 12966 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:20:01,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:20:01,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:20:01,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:20:04,785 INFO L124 PetriNetUnfolderBase]: 5008/8137 cut-off events. [2024-06-21 22:20:04,786 INFO L125 PetriNetUnfolderBase]: For 1247403/1247403 co-relation queries the response was YES. [2024-06-21 22:20:04,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96782 conditions, 8137 events. 5008/8137 cut-off events. For 1247403/1247403 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 55076 event pairs, 1226 based on Foata normal form. 1/8138 useless extension candidates. Maximal degree in co-relation 96573. Up to 7727 conditions per place. [2024-06-21 22:20:04,918 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 665 selfloop transitions, 45 changer transitions 0/715 dead transitions. [2024-06-21 22:20:04,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 715 transitions, 14688 flow [2024-06-21 22:20:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:20:04,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:20:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 22:20:04,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 22:20:04,920 INFO L175 Difference]: Start difference. First operand has 456 places, 689 transitions, 12966 flow. Second operand 8 states and 133 transitions. [2024-06-21 22:20:04,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 715 transitions, 14688 flow [2024-06-21 22:20:08,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 715 transitions, 14536 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 22:20:08,109 INFO L231 Difference]: Finished difference. Result has 461 places, 692 transitions, 13136 flow [2024-06-21 22:20:08,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12814, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13136, PETRI_PLACES=461, PETRI_TRANSITIONS=692} [2024-06-21 22:20:08,110 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-21 22:20:08,110 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 692 transitions, 13136 flow [2024-06-21 22:20:08,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:20:08,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:08,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:20:08,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 22:20:08,110 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:20:08,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:08,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1135115346, now seen corresponding path program 10 times [2024-06-21 22:20:08,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:08,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524822209] [2024-06-21 22:20:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:08,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:20:10,868 INFO 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 22:20:10,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:20:10,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524822209] [2024-06-21 22:20:10,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524822209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:20:10,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:20:10,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:20:10,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014611537] [2024-06-21 22:20:10,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:20:10,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:20:10,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:20:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:20:10,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:20:10,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:20:10,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 692 transitions, 13136 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:20:10,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:20:10,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:20:10,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:20:13,956 INFO L124 PetriNetUnfolderBase]: 5003/8113 cut-off events. [2024-06-21 22:20:13,956 INFO L125 PetriNetUnfolderBase]: For 1267010/1267010 co-relation queries the response was YES. [2024-06-21 22:20:14,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96885 conditions, 8113 events. 5003/8113 cut-off events. For 1267010/1267010 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 54632 event pairs, 1017 based on Foata normal form. 2/8112 useless extension candidates. Maximal degree in co-relation 96674. Up to 7695 conditions per place. [2024-06-21 22:20:14,103 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 627 selfloop transitions, 73 changer transitions 0/705 dead transitions. [2024-06-21 22:20:14,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 705 transitions, 14576 flow [2024-06-21 22:20:14,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:20:14,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:20:14,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 22:20:14,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 22:20:14,104 INFO L175 Difference]: Start difference. First operand has 461 places, 692 transitions, 13136 flow. Second operand 8 states and 123 transitions. [2024-06-21 22:20:14,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 705 transitions, 14576 flow [2024-06-21 22:20:18,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 705 transitions, 14254 flow, removed 120 selfloop flow, removed 6 redundant places. [2024-06-21 22:20:18,155 INFO L231 Difference]: Finished difference. Result has 463 places, 692 transitions, 12965 flow [2024-06-21 22:20:18,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12814, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12965, PETRI_PLACES=463, PETRI_TRANSITIONS=692} [2024-06-21 22:20:18,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-21 22:20:18,156 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 692 transitions, 12965 flow [2024-06-21 22:20:18,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:20:18,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:18,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:20:18,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 22:20:18,157 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:20:18,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:18,157 INFO L85 PathProgramCache]: Analyzing trace with hash -563026462, now seen corresponding path program 3 times [2024-06-21 22:20:18,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:18,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090122876] [2024-06-21 22:20:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:18,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:20:21,361 INFO 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 22:20:21,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:20:21,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090122876] [2024-06-21 22:20:21,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090122876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:20:21,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:20:21,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:20:21,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312621483] [2024-06-21 22:20:21,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:20:21,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:20:21,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:20:21,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:20:21,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:20:21,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:20:21,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 692 transitions, 12965 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:20:21,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:20:21,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:20:21,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:20:24,343 INFO L124 PetriNetUnfolderBase]: 5008/8140 cut-off events. [2024-06-21 22:20:24,343 INFO L125 PetriNetUnfolderBase]: For 1275738/1275738 co-relation queries the response was YES. [2024-06-21 22:20:24,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97043 conditions, 8140 events. 5008/8140 cut-off events. For 1275738/1275738 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 55105 event pairs, 1232 based on Foata normal form. 1/8140 useless extension candidates. Maximal degree in co-relation 96831. Up to 7707 conditions per place. [2024-06-21 22:20:24,484 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 666 selfloop transitions, 44 changer transitions 0/715 dead transitions. [2024-06-21 22:20:24,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 715 transitions, 14685 flow [2024-06-21 22:20:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:20:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:20:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 22:20:24,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 22:20:24,486 INFO L175 Difference]: Start difference. First operand has 463 places, 692 transitions, 12965 flow. Second operand 8 states and 132 transitions. [2024-06-21 22:20:24,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 715 transitions, 14685 flow [2024-06-21 22:20:28,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 715 transitions, 14436 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 22:20:28,456 INFO L231 Difference]: Finished difference. Result has 464 places, 695 transitions, 13038 flow [2024-06-21 22:20:28,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12716, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13038, PETRI_PLACES=464, PETRI_TRANSITIONS=695} [2024-06-21 22:20:28,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-21 22:20:28,456 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 695 transitions, 13038 flow [2024-06-21 22:20:28,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:20:28,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:28,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:20:28,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 22:20:28,457 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:20:28,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:28,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1814645038, now seen corresponding path program 4 times [2024-06-21 22:20:28,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:28,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439836515] [2024-06-21 22:20:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:28,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:20:32,272 INFO 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 22:20:32,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:20:32,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439836515] [2024-06-21 22:20:32,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439836515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:20:32,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:20:32,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 22:20:32,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988869395] [2024-06-21 22:20:32,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:20:32,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 22:20:32,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:20:32,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 22:20:32,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 22:20:32,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:20:32,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 695 transitions, 13038 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:20:32,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:20:32,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:20:32,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:20:35,183 INFO L124 PetriNetUnfolderBase]: 5005/8136 cut-off events. [2024-06-21 22:20:35,183 INFO L125 PetriNetUnfolderBase]: For 1293716/1293716 co-relation queries the response was YES. [2024-06-21 22:20:35,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97191 conditions, 8136 events. 5005/8136 cut-off events. For 1293716/1293716 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 55128 event pairs, 1232 based on Foata normal form. 1/8136 useless extension candidates. Maximal degree in co-relation 96978. Up to 7672 conditions per place. [2024-06-21 22:20:35,331 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 646 selfloop transitions, 63 changer transitions 0/714 dead transitions. [2024-06-21 22:20:35,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 714 transitions, 14742 flow [2024-06-21 22:20:35,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 22:20:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 22:20:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 22:20:35,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 22:20:35,333 INFO L175 Difference]: Start difference. First operand has 464 places, 695 transitions, 13038 flow. Second operand 8 states and 128 transitions. [2024-06-21 22:20:35,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 714 transitions, 14742 flow [2024-06-21 22:20:39,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 714 transitions, 14442 flow, removed 108 selfloop flow, removed 6 redundant places. [2024-06-21 22:20:39,087 INFO L231 Difference]: Finished difference. Result has 466 places, 698 transitions, 13104 flow [2024-06-21 22:20:39,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12738, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13104, PETRI_PLACES=466, PETRI_TRANSITIONS=698} [2024-06-21 22:20:39,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-21 22:20:39,088 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 698 transitions, 13104 flow [2024-06-21 22:20:39,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:20:39,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:39,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:20:39,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 22:20:39,088 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:20:39,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:39,089 INFO L85 PathProgramCache]: Analyzing trace with hash -223287130, now seen corresponding path program 5 times [2024-06-21 22:20:39,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:39,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995726083] [2024-06-21 22:20:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:39,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:20:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 22:20:41,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:20:41,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995726083] [2024-06-21 22:20:41,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995726083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:20:41,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:20:41,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:20:41,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5068316] [2024-06-21 22:20:41,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:20:41,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:20:41,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:20:41,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:20:41,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:20:41,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:20:41,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 698 transitions, 13104 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:20:41,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:20:41,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:20:41,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:20:44,787 INFO L124 PetriNetUnfolderBase]: 5026/8154 cut-off events. [2024-06-21 22:20:44,788 INFO L125 PetriNetUnfolderBase]: For 1340865/1340865 co-relation queries the response was YES. [2024-06-21 22:20:44,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98411 conditions, 8154 events. 5026/8154 cut-off events. For 1340865/1340865 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 55160 event pairs, 1211 based on Foata normal form. 2/8156 useless extension candidates. Maximal degree in co-relation 98197. Up to 7641 conditions per place. [2024-06-21 22:20:44,927 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 651 selfloop transitions, 82 changer transitions 0/738 dead transitions. [2024-06-21 22:20:44,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 738 transitions, 15201 flow [2024-06-21 22:20:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:20:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:20:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 22:20:44,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 22:20:44,928 INFO L175 Difference]: Start difference. First operand has 466 places, 698 transitions, 13104 flow. Second operand 9 states and 157 transitions. [2024-06-21 22:20:44,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 738 transitions, 15201 flow [2024-06-21 22:20:49,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 738 transitions, 14857 flow, removed 111 selfloop flow, removed 6 redundant places. [2024-06-21 22:20:49,042 INFO L231 Difference]: Finished difference. Result has 470 places, 703 transitions, 13236 flow [2024-06-21 22:20:49,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12760, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13236, PETRI_PLACES=470, PETRI_TRANSITIONS=703} [2024-06-21 22:20:49,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-21 22:20:49,042 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 703 transitions, 13236 flow [2024-06-21 22:20:49,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:20:49,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:49,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:20:49,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 22:20:49,043 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:20:49,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:49,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1562087304, now seen corresponding path program 6 times [2024-06-21 22:20:49,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:49,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697402814] [2024-06-21 22:20:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:49,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:20:51,639 INFO 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 22:20:51,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:20:51,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697402814] [2024-06-21 22:20:51,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697402814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:20:51,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:20:51,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:20:51,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891094873] [2024-06-21 22:20:51,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:20:51,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:20:51,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:20:51,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:20:51,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:20:51,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:20:51,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 703 transitions, 13236 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:20:51,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:20:51,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:20:51,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:20:54,940 INFO L124 PetriNetUnfolderBase]: 5034/8178 cut-off events. [2024-06-21 22:20:54,940 INFO L125 PetriNetUnfolderBase]: For 1359347/1359347 co-relation queries the response was YES. [2024-06-21 22:20:55,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98938 conditions, 8178 events. 5034/8178 cut-off events. For 1359347/1359347 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 55441 event pairs, 1228 based on Foata normal form. 2/8180 useless extension candidates. Maximal degree in co-relation 98722. Up to 7730 conditions per place. [2024-06-21 22:20:55,075 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 654 selfloop transitions, 75 changer transitions 0/734 dead transitions. [2024-06-21 22:20:55,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 734 transitions, 14934 flow [2024-06-21 22:20:55,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:20:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:20:55,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 22:20:55,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 22:20:55,077 INFO L175 Difference]: Start difference. First operand has 470 places, 703 transitions, 13236 flow. Second operand 9 states and 151 transitions. [2024-06-21 22:20:55,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 734 transitions, 14934 flow [2024-06-21 22:20:59,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 734 transitions, 14694 flow, removed 103 selfloop flow, removed 4 redundant places. [2024-06-21 22:20:59,093 INFO L231 Difference]: Finished difference. Result has 475 places, 705 transitions, 13289 flow [2024-06-21 22:20:59,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13038, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13289, PETRI_PLACES=475, PETRI_TRANSITIONS=705} [2024-06-21 22:20:59,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-21 22:20:59,094 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 705 transitions, 13289 flow [2024-06-21 22:20:59,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:20:59,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:20:59,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:20:59,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 22:20:59,094 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:20:59,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:20:59,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1926669182, now seen corresponding path program 6 times [2024-06-21 22:20:59,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:20:59,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50650541] [2024-06-21 22:20:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:20:59,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:20:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:21:01,771 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 22:21:01,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:21:01,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50650541] [2024-06-21 22:21:01,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50650541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:21:01,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:21:01,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:21:01,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200196962] [2024-06-21 22:21:01,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:21:01,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:21:01,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:21:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:21:01,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:21:01,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:21:01,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 705 transitions, 13289 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:21:01,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:21:01,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:21:01,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:21:05,606 INFO L124 PetriNetUnfolderBase]: 5060/8208 cut-off events. [2024-06-21 22:21:05,606 INFO L125 PetriNetUnfolderBase]: For 1371380/1371380 co-relation queries the response was YES. [2024-06-21 22:21:05,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99730 conditions, 8208 events. 5060/8208 cut-off events. For 1371380/1371380 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 55629 event pairs, 1229 based on Foata normal form. 2/8210 useless extension candidates. Maximal degree in co-relation 99513. Up to 7617 conditions per place. [2024-06-21 22:21:05,845 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 663 selfloop transitions, 129 changer transitions 0/797 dead transitions. [2024-06-21 22:21:05,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 797 transitions, 16790 flow [2024-06-21 22:21:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:21:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:21:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 22:21:05,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 22:21:05,847 INFO L175 Difference]: Start difference. First operand has 475 places, 705 transitions, 13289 flow. Second operand 9 states and 162 transitions. [2024-06-21 22:21:05,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 797 transitions, 16790 flow [2024-06-21 22:21:09,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 797 transitions, 16605 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 22:21:09,744 INFO L231 Difference]: Finished difference. Result has 482 places, 761 transitions, 14918 flow [2024-06-21 22:21:09,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13104, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14918, PETRI_PLACES=482, PETRI_TRANSITIONS=761} [2024-06-21 22:21:09,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-21 22:21:09,745 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 761 transitions, 14918 flow [2024-06-21 22:21:09,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:21:09,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:21:09,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:21:09,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 22:21:09,745 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:21:09,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:21:09,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1830248072, now seen corresponding path program 7 times [2024-06-21 22:21:09,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:21:09,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247033985] [2024-06-21 22:21:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:21:09,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:21:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:21:13,945 INFO 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 22:21:13,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:21:13,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247033985] [2024-06-21 22:21:13,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247033985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:21:13,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:21:13,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:21:13,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686251781] [2024-06-21 22:21:13,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:21:13,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:21:13,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:21:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:21:13,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:21:13,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:21:13,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 761 transitions, 14918 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:21:13,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:21:13,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:21:13,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:21:17,191 INFO L124 PetriNetUnfolderBase]: 5124/8304 cut-off events. [2024-06-21 22:21:17,191 INFO L125 PetriNetUnfolderBase]: For 1478470/1478470 co-relation queries the response was YES. [2024-06-21 22:21:17,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102836 conditions, 8304 events. 5124/8304 cut-off events. For 1478470/1478470 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 56220 event pairs, 1231 based on Foata normal form. 12/8316 useless extension candidates. Maximal degree in co-relation 102615. Up to 7808 conditions per place. [2024-06-21 22:21:17,335 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 735 selfloop transitions, 54 changer transitions 0/794 dead transitions. [2024-06-21 22:21:17,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 794 transitions, 17037 flow [2024-06-21 22:21:17,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:21:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:21:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 22:21:17,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 22:21:17,336 INFO L175 Difference]: Start difference. First operand has 482 places, 761 transitions, 14918 flow. Second operand 9 states and 150 transitions. [2024-06-21 22:21:17,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 794 transitions, 17037 flow [2024-06-21 22:21:22,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 794 transitions, 16780 flow, removed 116 selfloop flow, removed 3 redundant places. [2024-06-21 22:21:22,302 INFO L231 Difference]: Finished difference. Result has 488 places, 766 transitions, 15091 flow [2024-06-21 22:21:22,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14661, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15091, PETRI_PLACES=488, PETRI_TRANSITIONS=766} [2024-06-21 22:21:22,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-21 22:21:22,303 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 766 transitions, 15091 flow [2024-06-21 22:21:22,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:21:22,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:21:22,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:21:22,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 22:21:22,303 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:21:22,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:21:22,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2007452030, now seen corresponding path program 7 times [2024-06-21 22:21:22,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:21:22,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929872599] [2024-06-21 22:21:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:21:22,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:21:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:21:26,482 INFO 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 22:21:26,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:21:26,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929872599] [2024-06-21 22:21:26,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929872599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:21:26,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:21:26,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:21:26,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712434025] [2024-06-21 22:21:26,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:21:26,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:21:26,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:21:26,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:21:26,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:21:26,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:21:26,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 766 transitions, 15091 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:21:26,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:21:26,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:21:26,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:21:30,183 INFO L124 PetriNetUnfolderBase]: 5196/8406 cut-off events. [2024-06-21 22:21:30,183 INFO L125 PetriNetUnfolderBase]: For 1489052/1489052 co-relation queries the response was YES. [2024-06-21 22:21:30,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105139 conditions, 8406 events. 5196/8406 cut-off events. For 1489052/1489052 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 56801 event pairs, 1229 based on Foata normal form. 4/8410 useless extension candidates. Maximal degree in co-relation 104916. Up to 7910 conditions per place. [2024-06-21 22:21:30,328 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 732 selfloop transitions, 69 changer transitions 0/806 dead transitions. [2024-06-21 22:21:30,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 806 transitions, 17615 flow [2024-06-21 22:21:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:21:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:21:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 22:21:30,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 22:21:30,329 INFO L175 Difference]: Start difference. First operand has 488 places, 766 transitions, 15091 flow. Second operand 9 states and 153 transitions. [2024-06-21 22:21:30,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 806 transitions, 17615 flow [2024-06-21 22:21:34,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 806 transitions, 17436 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 22:21:34,773 INFO L231 Difference]: Finished difference. Result has 490 places, 778 transitions, 15636 flow [2024-06-21 22:21:34,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14912, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15636, PETRI_PLACES=490, PETRI_TRANSITIONS=778} [2024-06-21 22:21:34,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 447 predicate places. [2024-06-21 22:21:34,774 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 778 transitions, 15636 flow [2024-06-21 22:21:34,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:21:34,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:21:34,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:21:34,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 22:21:34,776 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:21:34,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:21:34,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2007456680, now seen corresponding path program 8 times [2024-06-21 22:21:34,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:21:34,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951219748] [2024-06-21 22:21:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:21:34,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:21:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:21:38,266 INFO 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 22:21:38,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:21:38,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951219748] [2024-06-21 22:21:38,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951219748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:21:38,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:21:38,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:21:38,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696184258] [2024-06-21 22:21:38,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:21:38,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:21:38,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:21:38,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:21:38,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:21:38,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:21:38,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 778 transitions, 15636 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:21:38,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:21:38,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:21:38,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:21:42,083 INFO L124 PetriNetUnfolderBase]: 5184/8388 cut-off events. [2024-06-21 22:21:42,084 INFO L125 PetriNetUnfolderBase]: For 1496832/1496832 co-relation queries the response was YES. [2024-06-21 22:21:42,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105081 conditions, 8388 events. 5184/8388 cut-off events. For 1496832/1496832 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 56750 event pairs, 1229 based on Foata normal form. 4/8392 useless extension candidates. Maximal degree in co-relation 104857. Up to 7936 conditions per place. [2024-06-21 22:21:42,229 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 744 selfloop transitions, 55 changer transitions 0/804 dead transitions. [2024-06-21 22:21:42,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 804 transitions, 17350 flow [2024-06-21 22:21:42,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 22:21:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 22:21:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 22:21:42,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 22:21:42,231 INFO L175 Difference]: Start difference. First operand has 490 places, 778 transitions, 15636 flow. Second operand 9 states and 149 transitions. [2024-06-21 22:21:42,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 804 transitions, 17350 flow [2024-06-21 22:21:46,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 804 transitions, 16829 flow, removed 232 selfloop flow, removed 5 redundant places. [2024-06-21 22:21:46,539 INFO L231 Difference]: Finished difference. Result has 494 places, 778 transitions, 15237 flow [2024-06-21 22:21:46,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15115, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15237, PETRI_PLACES=494, PETRI_TRANSITIONS=778} [2024-06-21 22:21:46,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-21 22:21:46,540 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 778 transitions, 15237 flow [2024-06-21 22:21:46,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:21:46,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 22:21:46,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 22:21:46,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 22:21:46,541 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 22:21:46,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 22:21:46,541 INFO L85 PathProgramCache]: Analyzing trace with hash -461572658, now seen corresponding path program 9 times [2024-06-21 22:21:46,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 22:21:46,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708128169] [2024-06-21 22:21:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 22:21:46,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 22:21:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 22:21:49,080 INFO 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 22:21:49,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 22:21:49,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708128169] [2024-06-21 22:21:49,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708128169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 22:21:49,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 22:21:49,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 22:21:49,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014397324] [2024-06-21 22:21:49,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 22:21:49,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 22:21:49,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 22:21:49,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 22:21:49,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 22:21:49,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 22:21:49,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 778 transitions, 15237 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 22:21:49,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 22:21:49,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 22:21:49,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 22:21:53,165 INFO L124 PetriNetUnfolderBase]: 5291/8529 cut-off events. [2024-06-21 22:21:53,166 INFO L125 PetriNetUnfolderBase]: For 1529959/1529959 co-relation queries the response was YES.