./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe015_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe015_rmo.i ./goblint.2024-05-21_14-57-05.files/protection/safe015_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:13:03,634 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:13:03,714 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:13:03,719 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:13:03,719 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:13:03,744 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:13:03,744 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:13:03,744 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:13:03,745 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:13:03,745 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:13:03,745 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:13:03,745 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:13:03,746 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:13:03,746 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:13:03,746 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:13:03,746 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:13:03,747 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:13:03,747 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:13:03,747 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:13:03,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:13:03,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:13:03,748 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:13:03,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:13:03,748 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:13:03,748 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:13:03,748 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:13:03,749 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:13:03,749 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:13:03,749 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:13:03,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:13:03,749 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:13:03,750 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:13:03,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:13:03,750 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:13:03,750 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:13:03,750 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:13:03,751 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:13:03,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:13:03,751 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:13:03,751 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:13:03,751 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:13:03,752 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:13:03,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:13:03,752 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:13:03,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:13:03,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:13:03,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:13:03,951 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:13:03,951 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:13:03,952 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_rmo.i [2024-06-14 13:13:05,003 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:13:05,223 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:13:05,225 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_rmo.i [2024-06-14 13:13:05,245 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60833d053/fcbfc7c2562d45fda5f1c9539cadb935/FLAG8f8170f6a [2024-06-14 13:13:05,254 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60833d053/fcbfc7c2562d45fda5f1c9539cadb935 [2024-06-14 13:13:05,256 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:13:05,256 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:13:05,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe015_rmo.yml/witness.yml [2024-06-14 13:13:05,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:13:05,450 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:13:05,450 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:13:05,451 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:13:05,454 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:13:05,455 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:13:05" (1/2) ... [2024-06-14 13:13:05,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13388866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:13:05, skipping insertion in model container [2024-06-14 13:13:05,457 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:13:05" (1/2) ... [2024-06-14 13:13:05,458 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@647d6ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:13:05, skipping insertion in model container [2024-06-14 13:13:05,458 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:13:05" (2/2) ... [2024-06-14 13:13:05,458 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13388866 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:05, skipping insertion in model container [2024-06-14 13:13:05,458 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:13:05" (2/2) ... [2024-06-14 13:13:05,459 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:13:05,570 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:13:05,572 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 13:13:05,572 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 13:13:05,572 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((((((((((((((! multithreaded || x$r_buff0_thd0 == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 2) && *__unbuffered_p2_EAX$read_delayed_var <= 127) && __unbuffered_p2_EAX$read_delayed_var == & x) && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-06-14 13:13:05,572 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:13:05,572 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-14 13:13:05,619 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:13:05,913 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:13:05,922 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:13:06,084 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:13:06,113 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:13:06,113 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06 WrapperNode [2024-06-14 13:13:06,114 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:13:06,114 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:13:06,115 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:13:06,115 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:13:06,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06" (1/1) ... [2024-06-14 13:13:06,160 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06" (1/1) ... [2024-06-14 13:13:06,195 INFO L138 Inliner]: procedures = 175, calls = 109, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 278 [2024-06-14 13:13:06,195 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:13:06,196 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:13:06,196 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:13:06,196 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:13:06,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06" (1/1) ... [2024-06-14 13:13:06,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06" (1/1) ... [2024-06-14 13:13:06,218 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06" (1/1) ... [2024-06-14 13:13:06,236 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-14 13:13:06,236 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06" (1/1) ... [2024-06-14 13:13:06,236 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06" (1/1) ... [2024-06-14 13:13:06,253 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06" (1/1) ... [2024-06-14 13:13:06,255 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06" (1/1) ... [2024-06-14 13:13:06,258 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06" (1/1) ... [2024-06-14 13:13:06,260 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06" (1/1) ... [2024-06-14 13:13:06,266 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:13:06,267 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:13:06,267 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:13:06,267 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:13:06,268 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06" (1/1) ... [2024-06-14 13:13:06,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:13:06,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:13:06,292 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:13:06,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:13:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:13:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:13:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:13:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:13:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:13:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:13:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:13:06,340 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:13:06,341 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:13:06,341 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:13:06,341 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:13:06,342 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:13:06,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:13:06,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:13:06,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:13:06,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:13:06,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:13:06,345 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:13:06,498 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:13:06,499 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:13:07,004 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:13:07,004 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:13:07,480 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:13:07,480 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:13:07,481 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:13:07 BoogieIcfgContainer [2024-06-14 13:13:07,481 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:13:07,483 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:13:07,483 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:13:07,485 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:13:07,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:13:05" (1/4) ... [2024-06-14 13:13:07,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323b3b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:13:07, skipping insertion in model container [2024-06-14 13:13:07,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:13:05" (2/4) ... [2024-06-14 13:13:07,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323b3b90 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:13:07, skipping insertion in model container [2024-06-14 13:13:07,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:13:06" (3/4) ... [2024-06-14 13:13:07,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323b3b90 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:13:07, skipping insertion in model container [2024-06-14 13:13:07,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:13:07" (4/4) ... [2024-06-14 13:13:07,488 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_rmo.i [2024-06-14 13:13:07,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:13:07,504 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:13:07,504 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:13:07,561 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:13:07,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 13:13:07,624 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-14 13:13:07,624 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:13:07,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:13:07,627 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 13:13:07,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-14 13:13:07,641 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:13:07,647 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;@3bf55d74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:13:07,647 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:13:07,652 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:13:07,652 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:13:07,652 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:13:07,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:07,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:13:07,654 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)] === [2024-06-14 13:13:07,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:07,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1981672170, now seen corresponding path program 1 times [2024-06-14 13:13:07,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:07,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789045300] [2024-06-14 13:13:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:07,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:09,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:09,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789045300] [2024-06-14 13:13:09,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789045300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:09,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:09,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:13:09,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617129511] [2024-06-14 13:13:09,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:09,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:13:09,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:09,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:13:09,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:13:09,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:09,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:09,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:09,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:09,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:10,022 INFO L124 PetriNetUnfolderBase]: 1412/2150 cut-off events. [2024-06-14 13:13:10,023 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 13:13:10,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4354 conditions, 2150 events. 1412/2150 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10204 event pairs, 956 based on Foata normal form. 1/2116 useless extension candidates. Maximal degree in co-relation 4339. Up to 2115 conditions per place. [2024-06-14 13:13:10,040 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 38 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-06-14 13:13:10,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 193 flow [2024-06-14 13:13:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:13:10,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:13:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-14 13:13:10,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-14 13:13:10,052 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 69 transitions. [2024-06-14 13:13:10,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 193 flow [2024-06-14 13:13:10,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:10,056 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-14 13:13:10,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 13:13:10,060 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-14 13:13:10,060 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-14 13:13:10,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:10,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:10,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:10,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:13:10,061 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)] === [2024-06-14 13:13:10,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:10,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1716390443, now seen corresponding path program 1 times [2024-06-14 13:13:10,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:10,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728070925] [2024-06-14 13:13:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:10,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:11,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:11,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728070925] [2024-06-14 13:13:11,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728070925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:11,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:11,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:13:11,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762779888] [2024-06-14 13:13:11,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:11,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:13:11,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:11,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:13:11,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:13:11,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:11,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:11,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:11,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:11,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:12,063 INFO L124 PetriNetUnfolderBase]: 1400/2132 cut-off events. [2024-06-14 13:13:12,063 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-14 13:13:12,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4878 conditions, 2132 events. 1400/2132 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10117 event pairs, 654 based on Foata normal form. 6/2137 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-14 13:13:12,073 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 48 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-06-14 13:13:12,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 60 transitions, 272 flow [2024-06-14 13:13:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:13:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:13:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-14 13:13:12,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-06-14 13:13:12,076 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 90 transitions. [2024-06-14 13:13:12,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 60 transitions, 272 flow [2024-06-14 13:13:12,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:13:12,078 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-14 13:13:12,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-14 13:13:12,078 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-14 13:13:12,078 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-14 13:13:12,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:12,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:12,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:12,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:13:12,079 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)] === [2024-06-14 13:13:12,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:12,080 INFO L85 PathProgramCache]: Analyzing trace with hash -460508333, now seen corresponding path program 1 times [2024-06-14 13:13:12,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:12,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205648555] [2024-06-14 13:13:12,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:12,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:14,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:14,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205648555] [2024-06-14 13:13:14,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205648555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:14,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:14,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:13:14,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832465094] [2024-06-14 13:13:14,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:14,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:13:14,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:14,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:13:14,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:13:14,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:14,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:14,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:14,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:14,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:15,618 INFO L124 PetriNetUnfolderBase]: 1391/2117 cut-off events. [2024-06-14 13:13:15,618 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-14 13:13:15,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5386 conditions, 2117 events. 1391/2117 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10060 event pairs, 485 based on Foata normal form. 6/2122 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-14 13:13:15,630 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 61 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-14 13:13:15,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 78 transitions, 390 flow [2024-06-14 13:13:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-14 13:13:15,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 13:13:15,635 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 6 states and 124 transitions. [2024-06-14 13:13:15,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 78 transitions, 390 flow [2024-06-14 13:13:15,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 78 transitions, 370 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 13:13:15,638 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 185 flow [2024-06-14 13:13:15,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=185, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-14 13:13:15,639 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2024-06-14 13:13:15,640 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 185 flow [2024-06-14 13:13:15,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:15,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:15,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:15,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:13:15,640 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)] === [2024-06-14 13:13:15,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:15,641 INFO L85 PathProgramCache]: Analyzing trace with hash -494890024, now seen corresponding path program 1 times [2024-06-14 13:13:15,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:15,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545628894] [2024-06-14 13:13:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:15,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:17,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:17,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545628894] [2024-06-14 13:13:17,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545628894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:17,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:17,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:13:17,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343085152] [2024-06-14 13:13:17,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:17,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:13:17,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:17,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:13:17,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:13:17,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:17,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:17,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:17,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:17,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:17,990 INFO L124 PetriNetUnfolderBase]: 1386/2111 cut-off events. [2024-06-14 13:13:17,991 INFO L125 PetriNetUnfolderBase]: For 2156/2156 co-relation queries the response was YES. [2024-06-14 13:13:17,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5898 conditions, 2111 events. 1386/2111 cut-off events. For 2156/2156 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10004 event pairs, 572 based on Foata normal form. 2/2111 useless extension candidates. Maximal degree in co-relation 5879. Up to 2036 conditions per place. [2024-06-14 13:13:18,002 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 52 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-14 13:13:18,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 391 flow [2024-06-14 13:13:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:13:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:13:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-14 13:13:18,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:13:18,003 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 185 flow. Second operand 5 states and 95 transitions. [2024-06-14 13:13:18,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 391 flow [2024-06-14 13:13:18,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 68 transitions, 364 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:18,009 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 232 flow [2024-06-14 13:13:18,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-14 13:13:18,010 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-14 13:13:18,010 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 232 flow [2024-06-14 13:13:18,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:18,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:18,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:18,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:13:18,011 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)] === [2024-06-14 13:13:18,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:18,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1854933368, now seen corresponding path program 1 times [2024-06-14 13:13:18,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:18,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352237847] [2024-06-14 13:13:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:18,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:19,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:19,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352237847] [2024-06-14 13:13:19,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352237847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:19,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:19,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:13:19,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787189280] [2024-06-14 13:13:19,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:19,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:13:19,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:19,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:13:19,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:13:19,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:19,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 232 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:19,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:19,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:19,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:20,276 INFO L124 PetriNetUnfolderBase]: 1376/2097 cut-off events. [2024-06-14 13:13:20,277 INFO L125 PetriNetUnfolderBase]: For 3360/3362 co-relation queries the response was YES. [2024-06-14 13:13:20,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6457 conditions, 2097 events. 1376/2097 cut-off events. For 3360/3362 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9928 event pairs, 566 based on Foata normal form. 6/2102 useless extension candidates. Maximal degree in co-relation 6435. Up to 2028 conditions per place. [2024-06-14 13:13:20,290 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 51 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-14 13:13:20,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 390 flow [2024-06-14 13:13:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:13:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:13:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-14 13:13:20,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-14 13:13:20,295 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 232 flow. Second operand 5 states and 93 transitions. [2024-06-14 13:13:20,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 390 flow [2024-06-14 13:13:20,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 376 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-14 13:13:20,303 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 246 flow [2024-06-14 13:13:20,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-06-14 13:13:20,306 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-14 13:13:20,306 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 246 flow [2024-06-14 13:13:20,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:20,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:20,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:20,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:13:20,307 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)] === [2024-06-14 13:13:20,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:20,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1660388491, now seen corresponding path program 1 times [2024-06-14 13:13:20,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:20,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676518308] [2024-06-14 13:13:20,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:20,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:22,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:22,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676518308] [2024-06-14 13:13:22,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676518308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:22,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:22,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:22,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390458134] [2024-06-14 13:13:22,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:22,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:22,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:22,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:22,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:22,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:22,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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) [2024-06-14 13:13:22,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:22,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:22,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:23,146 INFO L124 PetriNetUnfolderBase]: 1389/2123 cut-off events. [2024-06-14 13:13:23,146 INFO L125 PetriNetUnfolderBase]: For 4396/4396 co-relation queries the response was YES. [2024-06-14 13:13:23,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6771 conditions, 2123 events. 1389/2123 cut-off events. For 4396/4396 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10132 event pairs, 523 based on Foata normal form. 2/2123 useless extension candidates. Maximal degree in co-relation 6746. Up to 1956 conditions per place. [2024-06-14 13:13:23,157 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 62 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2024-06-14 13:13:23,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 530 flow [2024-06-14 13:13:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 13:13:23,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2024-06-14 13:13:23,158 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 246 flow. Second operand 6 states and 119 transitions. [2024-06-14 13:13:23,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 530 flow [2024-06-14 13:13:23,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 516 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:13:23,164 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 330 flow [2024-06-14 13:13:23,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=330, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-06-14 13:13:23,166 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-14 13:13:23,166 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 330 flow [2024-06-14 13:13:23,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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) [2024-06-14 13:13:23,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:23,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:23,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:13:23,167 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)] === [2024-06-14 13:13:23,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:23,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1667775481, now seen corresponding path program 2 times [2024-06-14 13:13:23,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:23,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830966969] [2024-06-14 13:13:23,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:23,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:24,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:24,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830966969] [2024-06-14 13:13:24,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830966969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:24,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:24,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:24,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056147283] [2024-06-14 13:13:24,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:24,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:24,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:24,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:24,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 330 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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) [2024-06-14 13:13:24,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:24,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:24,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:26,029 INFO L124 PetriNetUnfolderBase]: 1384/2109 cut-off events. [2024-06-14 13:13:26,030 INFO L125 PetriNetUnfolderBase]: For 6466/6466 co-relation queries the response was YES. [2024-06-14 13:13:26,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7418 conditions, 2109 events. 1384/2109 cut-off events. For 6466/6466 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10047 event pairs, 537 based on Foata normal form. 2/2106 useless extension candidates. Maximal degree in co-relation 7390. Up to 1953 conditions per place. [2024-06-14 13:13:26,049 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 56 selfloop transitions, 21 changer transitions 0/82 dead transitions. [2024-06-14 13:13:26,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 82 transitions, 586 flow [2024-06-14 13:13:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:26,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:26,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-14 13:13:26,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2024-06-14 13:13:26,051 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 330 flow. Second operand 6 states and 113 transitions. [2024-06-14 13:13:26,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 82 transitions, 586 flow [2024-06-14 13:13:26,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 556 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 13:13:26,059 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 378 flow [2024-06-14 13:13:26,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2024-06-14 13:13:26,060 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-14 13:13:26,060 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 378 flow [2024-06-14 13:13:26,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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) [2024-06-14 13:13:26,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:26,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:26,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:13:26,061 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)] === [2024-06-14 13:13:26,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:26,061 INFO L85 PathProgramCache]: Analyzing trace with hash -919323657, now seen corresponding path program 1 times [2024-06-14 13:13:26,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:26,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70584929] [2024-06-14 13:13:26,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:26,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:27,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:27,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70584929] [2024-06-14 13:13:27,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70584929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:27,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:27,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:27,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388726445] [2024-06-14 13:13:27,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:27,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:27,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:27,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:27,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:27,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:27,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 378 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:27,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:27,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:27,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:28,369 INFO L124 PetriNetUnfolderBase]: 1471/2249 cut-off events. [2024-06-14 13:13:28,369 INFO L125 PetriNetUnfolderBase]: For 8390/8392 co-relation queries the response was YES. [2024-06-14 13:13:28,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8341 conditions, 2249 events. 1471/2249 cut-off events. For 8390/8392 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10777 event pairs, 524 based on Foata normal form. 6/2253 useless extension candidates. Maximal degree in co-relation 8311. Up to 2020 conditions per place. [2024-06-14 13:13:28,380 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 73 selfloop transitions, 34 changer transitions 0/112 dead transitions. [2024-06-14 13:13:28,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 112 transitions, 866 flow [2024-06-14 13:13:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 13:13:28,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-14 13:13:28,382 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 378 flow. Second operand 7 states and 142 transitions. [2024-06-14 13:13:28,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 112 transitions, 866 flow [2024-06-14 13:13:28,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 802 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:28,388 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 564 flow [2024-06-14 13:13:28,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=564, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-14 13:13:28,388 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 29 predicate places. [2024-06-14 13:13:28,389 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 564 flow [2024-06-14 13:13:28,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:28,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:28,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:28,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:13:28,389 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)] === [2024-06-14 13:13:28,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:28,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1148501011, now seen corresponding path program 2 times [2024-06-14 13:13:28,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:28,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032291161] [2024-06-14 13:13:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:28,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:29,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:29,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032291161] [2024-06-14 13:13:29,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032291161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:29,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:29,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:29,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606482513] [2024-06-14 13:13:29,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:29,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:29,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:29,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:29,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:29,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:29,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 564 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:29,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:29,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:29,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:31,049 INFO L124 PetriNetUnfolderBase]: 1515/2327 cut-off events. [2024-06-14 13:13:31,049 INFO L125 PetriNetUnfolderBase]: For 10873/10877 co-relation queries the response was YES. [2024-06-14 13:13:31,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9060 conditions, 2327 events. 1515/2327 cut-off events. For 10873/10877 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11254 event pairs, 531 based on Foata normal form. 10/2335 useless extension candidates. Maximal degree in co-relation 9026. Up to 2058 conditions per place. [2024-06-14 13:13:31,062 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 65 selfloop transitions, 40 changer transitions 0/110 dead transitions. [2024-06-14 13:13:31,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 110 transitions, 954 flow [2024-06-14 13:13:31,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 13:13:31,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 13:13:31,063 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 564 flow. Second operand 6 states and 120 transitions. [2024-06-14 13:13:31,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 110 transitions, 954 flow [2024-06-14 13:13:31,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 110 transitions, 904 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:31,072 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 681 flow [2024-06-14 13:13:31,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=681, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-14 13:13:31,073 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-14 13:13:31,073 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 681 flow [2024-06-14 13:13:31,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:31,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:31,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:31,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:13:31,074 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)] === [2024-06-14 13:13:31,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:31,075 INFO L85 PathProgramCache]: Analyzing trace with hash 171272247, now seen corresponding path program 3 times [2024-06-14 13:13:31,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:31,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490139109] [2024-06-14 13:13:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:31,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:32,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:32,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490139109] [2024-06-14 13:13:32,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490139109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:32,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:32,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:13:32,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10528563] [2024-06-14 13:13:32,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:32,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:13:32,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:32,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:13:32,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:13:32,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:32,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 681 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:32,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:32,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:32,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:33,856 INFO L124 PetriNetUnfolderBase]: 1499/2299 cut-off events. [2024-06-14 13:13:33,857 INFO L125 PetriNetUnfolderBase]: For 12916/12928 co-relation queries the response was YES. [2024-06-14 13:13:33,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9167 conditions, 2299 events. 1499/2299 cut-off events. For 12916/12928 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11040 event pairs, 536 based on Foata normal form. 18/2313 useless extension candidates. Maximal degree in co-relation 9132. Up to 2045 conditions per place. [2024-06-14 13:13:33,868 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 60 selfloop transitions, 39 changer transitions 0/104 dead transitions. [2024-06-14 13:13:33,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 104 transitions, 945 flow [2024-06-14 13:13:33,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-14 13:13:33,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 13:13:33,870 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 681 flow. Second operand 6 states and 112 transitions. [2024-06-14 13:13:33,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 104 transitions, 945 flow [2024-06-14 13:13:33,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 104 transitions, 870 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:33,878 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 695 flow [2024-06-14 13:13:33,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=695, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-14 13:13:33,879 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-14 13:13:33,879 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 695 flow [2024-06-14 13:13:33,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:33,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:33,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:33,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:13:33,880 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)] === [2024-06-14 13:13:33,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:33,880 INFO L85 PathProgramCache]: Analyzing trace with hash 161710607, now seen corresponding path program 1 times [2024-06-14 13:13:33,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:33,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304425518] [2024-06-14 13:13:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:33,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:36,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:36,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304425518] [2024-06-14 13:13:36,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304425518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:36,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:36,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:36,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249340485] [2024-06-14 13:13:36,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:36,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:36,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:36,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:36,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 695 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:13:36,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:36,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:36,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:37,334 INFO L124 PetriNetUnfolderBase]: 1491/2292 cut-off events. [2024-06-14 13:13:37,334 INFO L125 PetriNetUnfolderBase]: For 12881/12883 co-relation queries the response was YES. [2024-06-14 13:13:37,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9090 conditions, 2292 events. 1491/2292 cut-off events. For 12881/12883 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10994 event pairs, 525 based on Foata normal form. 6/2297 useless extension candidates. Maximal degree in co-relation 9055. Up to 2175 conditions per place. [2024-06-14 13:13:37,348 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 88 selfloop transitions, 12 changer transitions 0/105 dead transitions. [2024-06-14 13:13:37,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 105 transitions, 971 flow [2024-06-14 13:13:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:13:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:13:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-14 13:13:37,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128787878787879 [2024-06-14 13:13:37,350 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 695 flow. Second operand 6 states and 109 transitions. [2024-06-14 13:13:37,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 105 transitions, 971 flow [2024-06-14 13:13:37,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 105 transitions, 802 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:13:37,361 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 579 flow [2024-06-14 13:13:37,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=579, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-06-14 13:13:37,362 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-06-14 13:13:37,362 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 579 flow [2024-06-14 13:13:37,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:13:37,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:37,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:37,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:13:37,363 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)] === [2024-06-14 13:13:37,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:37,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1844279324, now seen corresponding path program 1 times [2024-06-14 13:13:37,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:37,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663803612] [2024-06-14 13:13:37,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:37,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:39,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:39,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663803612] [2024-06-14 13:13:39,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663803612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:39,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:39,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:39,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685531766] [2024-06-14 13:13:39,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:39,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:39,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:39,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:39,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:39,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:39,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 579 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:39,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:39,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:39,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:40,808 INFO L124 PetriNetUnfolderBase]: 1540/2361 cut-off events. [2024-06-14 13:13:40,808 INFO L125 PetriNetUnfolderBase]: For 13321/13321 co-relation queries the response was YES. [2024-06-14 13:13:40,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9437 conditions, 2361 events. 1540/2361 cut-off events. For 13321/13321 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11367 event pairs, 521 based on Foata normal form. 2/2362 useless extension candidates. Maximal degree in co-relation 9403. Up to 2209 conditions per place. [2024-06-14 13:13:40,822 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 106 selfloop transitions, 19 changer transitions 0/130 dead transitions. [2024-06-14 13:13:40,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 130 transitions, 1033 flow [2024-06-14 13:13:40,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:40,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:13:40,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 13:13:40,825 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 579 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:13:40,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 130 transitions, 1033 flow [2024-06-14 13:13:40,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 998 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:40,837 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 652 flow [2024-06-14 13:13:40,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=652, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-06-14 13:13:40,839 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2024-06-14 13:13:40,839 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 652 flow [2024-06-14 13:13:40,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:40,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:40,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:40,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:13:40,840 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)] === [2024-06-14 13:13:40,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:40,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1243787478, now seen corresponding path program 2 times [2024-06-14 13:13:40,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:40,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406211065] [2024-06-14 13:13:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:40,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:43,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:43,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406211065] [2024-06-14 13:13:43,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406211065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:43,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:43,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:43,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773594107] [2024-06-14 13:13:43,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:43,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:43,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:43,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:43,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:43,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:43,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 652 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:43,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:43,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:43,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:44,393 INFO L124 PetriNetUnfolderBase]: 1553/2394 cut-off events. [2024-06-14 13:13:44,393 INFO L125 PetriNetUnfolderBase]: For 16537/16537 co-relation queries the response was YES. [2024-06-14 13:13:44,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10167 conditions, 2394 events. 1553/2394 cut-off events. For 16537/16537 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11680 event pairs, 479 based on Foata normal form. 2/2394 useless extension candidates. Maximal degree in co-relation 10131. Up to 1935 conditions per place. [2024-06-14 13:13:44,405 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 80 selfloop transitions, 45 changer transitions 0/130 dead transitions. [2024-06-14 13:13:44,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 1112 flow [2024-06-14 13:13:44,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 13:13:44,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 13:13:44,407 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 652 flow. Second operand 7 states and 137 transitions. [2024-06-14 13:13:44,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 1112 flow [2024-06-14 13:13:44,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 130 transitions, 1053 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:44,420 INFO L231 Difference]: Finished difference. Result has 84 places, 96 transitions, 793 flow [2024-06-14 13:13:44,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=793, PETRI_PLACES=84, PETRI_TRANSITIONS=96} [2024-06-14 13:13:44,421 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-06-14 13:13:44,421 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 96 transitions, 793 flow [2024-06-14 13:13:44,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:44,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:44,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:44,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:13:44,422 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)] === [2024-06-14 13:13:44,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:44,422 INFO L85 PathProgramCache]: Analyzing trace with hash 709474296, now seen corresponding path program 3 times [2024-06-14 13:13:44,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:44,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043810225] [2024-06-14 13:13:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:44,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:46,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:46,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043810225] [2024-06-14 13:13:46,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043810225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:46,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:46,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:46,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163352038] [2024-06-14 13:13:46,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:46,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:46,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:46,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:46,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:46,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:46,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 96 transitions, 793 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:46,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:46,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:46,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:47,918 INFO L124 PetriNetUnfolderBase]: 1548/2380 cut-off events. [2024-06-14 13:13:47,918 INFO L125 PetriNetUnfolderBase]: For 20152/20152 co-relation queries the response was YES. [2024-06-14 13:13:47,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10946 conditions, 2380 events. 1548/2380 cut-off events. For 20152/20152 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11628 event pairs, 542 based on Foata normal form. 2/2371 useless extension candidates. Maximal degree in co-relation 10909. Up to 1932 conditions per place. [2024-06-14 13:13:47,932 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 72 selfloop transitions, 50 changer transitions 0/127 dead transitions. [2024-06-14 13:13:47,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 127 transitions, 1207 flow [2024-06-14 13:13:47,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:13:47,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-14 13:13:47,934 INFO L175 Difference]: Start difference. First operand has 84 places, 96 transitions, 793 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:13:47,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 127 transitions, 1207 flow [2024-06-14 13:13:47,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 1146 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:47,949 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 883 flow [2024-06-14 13:13:47,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=883, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-06-14 13:13:47,950 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-14 13:13:47,950 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 883 flow [2024-06-14 13:13:47,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:47,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:47,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:47,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:13:47,951 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:47,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash -88039256, now seen corresponding path program 1 times [2024-06-14 13:13:47,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:47,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203512470] [2024-06-14 13:13:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:47,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:49,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:49,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203512470] [2024-06-14 13:13:49,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203512470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:49,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:49,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:13:49,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116098716] [2024-06-14 13:13:49,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:49,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:13:49,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:49,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:13:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:13:49,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:49,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 883 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:49,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:49,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:49,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:50,590 INFO L124 PetriNetUnfolderBase]: 1545/2396 cut-off events. [2024-06-14 13:13:50,590 INFO L125 PetriNetUnfolderBase]: For 21591/21591 co-relation queries the response was YES. [2024-06-14 13:13:50,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11072 conditions, 2396 events. 1545/2396 cut-off events. For 21591/21591 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11723 event pairs, 534 based on Foata normal form. 1/2396 useless extension candidates. Maximal degree in co-relation 11033. Up to 2306 conditions per place. [2024-06-14 13:13:50,603 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 99 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-06-14 13:13:50,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 112 transitions, 1143 flow [2024-06-14 13:13:50,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:13:50,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:13:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-14 13:13:50,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-14 13:13:50,604 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 883 flow. Second operand 5 states and 86 transitions. [2024-06-14 13:13:50,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 112 transitions, 1143 flow [2024-06-14 13:13:50,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 112 transitions, 1057 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:50,625 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 843 flow [2024-06-14 13:13:50,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=843, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2024-06-14 13:13:50,625 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-14 13:13:50,626 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 843 flow [2024-06-14 13:13:50,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:50,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:50,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:50,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:13:50,626 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)] === [2024-06-14 13:13:50,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:50,627 INFO L85 PathProgramCache]: Analyzing trace with hash -244902028, now seen corresponding path program 1 times [2024-06-14 13:13:50,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:50,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956171934] [2024-06-14 13:13:50,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:50,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:52,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:52,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956171934] [2024-06-14 13:13:52,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956171934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:52,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:52,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:52,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699474771] [2024-06-14 13:13:52,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:52,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:52,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:52,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:52,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 843 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:13:52,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:52,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:52,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:53,999 INFO L124 PetriNetUnfolderBase]: 1535/2379 cut-off events. [2024-06-14 13:13:53,999 INFO L125 PetriNetUnfolderBase]: For 23613/23613 co-relation queries the response was YES. [2024-06-14 13:13:54,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11136 conditions, 2379 events. 1535/2379 cut-off events. For 23613/23613 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11655 event pairs, 522 based on Foata normal form. 4/2382 useless extension candidates. Maximal degree in co-relation 11095. Up to 2209 conditions per place. [2024-06-14 13:13:54,012 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 116 selfloop transitions, 19 changer transitions 0/140 dead transitions. [2024-06-14 13:13:54,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 140 transitions, 1223 flow [2024-06-14 13:13:54,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:13:54,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:13:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:13:54,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 13:13:54,014 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 843 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:13:54,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 140 transitions, 1223 flow [2024-06-14 13:13:54,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 140 transitions, 1189 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:13:54,031 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 855 flow [2024-06-14 13:13:54,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=855, PETRI_PLACES=94, PETRI_TRANSITIONS=102} [2024-06-14 13:13:54,032 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-14 13:13:54,032 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 855 flow [2024-06-14 13:13:54,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:13:54,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:54,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:54,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:13:54,033 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)] === [2024-06-14 13:13:54,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:54,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1190265788, now seen corresponding path program 2 times [2024-06-14 13:13:54,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:54,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504508218] [2024-06-14 13:13:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:54,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:56,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:56,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504508218] [2024-06-14 13:13:56,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504508218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:56,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:56,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:13:56,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484836846] [2024-06-14 13:13:56,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:56,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:13:56,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:56,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:13:56,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:13:56,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:13:56,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 102 transitions, 855 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:13:56,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:56,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:13:56,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:57,583 INFO L124 PetriNetUnfolderBase]: 1597/2484 cut-off events. [2024-06-14 13:13:57,583 INFO L125 PetriNetUnfolderBase]: For 27322/27326 co-relation queries the response was YES. [2024-06-14 13:13:57,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11897 conditions, 2484 events. 1597/2484 cut-off events. For 27322/27326 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12365 event pairs, 474 based on Foata normal form. 8/2490 useless extension candidates. Maximal degree in co-relation 11855. Up to 1972 conditions per place. [2024-06-14 13:13:57,597 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 85 selfloop transitions, 55 changer transitions 0/145 dead transitions. [2024-06-14 13:13:57,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 145 transitions, 1429 flow [2024-06-14 13:13:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:13:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:13:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 13:13:57,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-14 13:13:57,600 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 855 flow. Second operand 7 states and 141 transitions. [2024-06-14 13:13:57,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 145 transitions, 1429 flow [2024-06-14 13:13:57,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 145 transitions, 1391 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:13:57,616 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 1013 flow [2024-06-14 13:13:57,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1013, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-14 13:13:57,617 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-14 13:13:57,617 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 1013 flow [2024-06-14 13:13:57,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:13:57,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:57,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:57,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:13:57,618 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)] === [2024-06-14 13:13:57,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:57,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1322057482, now seen corresponding path program 3 times [2024-06-14 13:13:57,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:57,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565333860] [2024-06-14 13:13:57,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:57,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:00,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:00,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565333860] [2024-06-14 13:14:00,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565333860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:00,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:00,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:00,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282847561] [2024-06-14 13:14:00,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:00,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:00,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:00,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:00,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:00,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:00,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 1013 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:00,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:00,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:00,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:01,754 INFO L124 PetriNetUnfolderBase]: 1623/2515 cut-off events. [2024-06-14 13:14:01,754 INFO L125 PetriNetUnfolderBase]: For 31361/31361 co-relation queries the response was YES. [2024-06-14 13:14:01,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12512 conditions, 2515 events. 1623/2515 cut-off events. For 31361/31361 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12471 event pairs, 483 based on Foata normal form. 4/2517 useless extension candidates. Maximal degree in co-relation 12469. Up to 1994 conditions per place. [2024-06-14 13:14:01,769 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 56 changer transitions 0/150 dead transitions. [2024-06-14 13:14:01,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 150 transitions, 1519 flow [2024-06-14 13:14:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:14:01,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 13:14:01,773 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 1013 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:14:01,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 150 transitions, 1519 flow [2024-06-14 13:14:01,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 150 transitions, 1443 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:14:01,795 INFO L231 Difference]: Finished difference. Result has 99 places, 111 transitions, 1101 flow [2024-06-14 13:14:01,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=940, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1101, PETRI_PLACES=99, PETRI_TRANSITIONS=111} [2024-06-14 13:14:01,796 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-14 13:14:01,796 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 111 transitions, 1101 flow [2024-06-14 13:14:01,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:01,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:01,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:01,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:14:01,796 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)] === [2024-06-14 13:14:01,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:01,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1190257852, now seen corresponding path program 1 times [2024-06-14 13:14:01,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:01,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369673364] [2024-06-14 13:14:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:01,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:04,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:04,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369673364] [2024-06-14 13:14:04,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369673364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:04,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:04,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:04,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309351564] [2024-06-14 13:14:04,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:04,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:04,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:04,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:04,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:04,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:04,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 111 transitions, 1101 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:04,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:04,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:04,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:05,605 INFO L124 PetriNetUnfolderBase]: 1643/2554 cut-off events. [2024-06-14 13:14:05,605 INFO L125 PetriNetUnfolderBase]: For 35313/35317 co-relation queries the response was YES. [2024-06-14 13:14:05,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12851 conditions, 2554 events. 1643/2554 cut-off events. For 35313/35317 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12660 event pairs, 485 based on Foata normal form. 8/2560 useless extension candidates. Maximal degree in co-relation 12807. Up to 2226 conditions per place. [2024-06-14 13:14:05,618 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 98 selfloop transitions, 42 changer transitions 0/145 dead transitions. [2024-06-14 13:14:05,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 145 transitions, 1491 flow [2024-06-14 13:14:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:05,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 13:14:05,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-14 13:14:05,620 INFO L175 Difference]: Start difference. First operand has 99 places, 111 transitions, 1101 flow. Second operand 7 states and 134 transitions. [2024-06-14 13:14:05,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 145 transitions, 1491 flow [2024-06-14 13:14:05,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 145 transitions, 1359 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:05,643 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 1086 flow [2024-06-14 13:14:05,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1086, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-06-14 13:14:05,644 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2024-06-14 13:14:05,644 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 1086 flow [2024-06-14 13:14:05,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:05,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:05,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:05,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:14:05,644 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)] === [2024-06-14 13:14:05,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:05,645 INFO L85 PathProgramCache]: Analyzing trace with hash 775576014, now seen corresponding path program 4 times [2024-06-14 13:14:05,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:05,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585585723] [2024-06-14 13:14:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:05,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:07,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:07,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585585723] [2024-06-14 13:14:07,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585585723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:07,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:07,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:07,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156385154] [2024-06-14 13:14:07,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:07,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:07,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:07,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:07,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:07,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:07,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 1086 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:14:07,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:07,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:07,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:09,152 INFO L124 PetriNetUnfolderBase]: 1633/2524 cut-off events. [2024-06-14 13:14:09,152 INFO L125 PetriNetUnfolderBase]: For 37847/37855 co-relation queries the response was YES. [2024-06-14 13:14:09,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12903 conditions, 2524 events. 1633/2524 cut-off events. For 37847/37855 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12568 event pairs, 507 based on Foata normal form. 12/2530 useless extension candidates. Maximal degree in co-relation 12858. Up to 2018 conditions per place. [2024-06-14 13:14:09,167 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 82 selfloop transitions, 56 changer transitions 0/143 dead transitions. [2024-06-14 13:14:09,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 143 transitions, 1518 flow [2024-06-14 13:14:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 13:14:09,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:14:09,169 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 1086 flow. Second operand 7 states and 133 transitions. [2024-06-14 13:14:09,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 143 transitions, 1518 flow [2024-06-14 13:14:09,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 143 transitions, 1417 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:09,194 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 1106 flow [2024-06-14 13:14:09,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1106, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2024-06-14 13:14:09,195 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2024-06-14 13:14:09,195 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 1106 flow [2024-06-14 13:14:09,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 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) [2024-06-14 13:14:09,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:09,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:09,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:14:09,195 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)] === [2024-06-14 13:14:09,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:09,196 INFO L85 PathProgramCache]: Analyzing trace with hash 518868114, now seen corresponding path program 5 times [2024-06-14 13:14:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:09,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878818387] [2024-06-14 13:14:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:09,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:11,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:11,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878818387] [2024-06-14 13:14:11,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878818387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:11,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:11,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:11,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060603098] [2024-06-14 13:14:11,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:11,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:11,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:11,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:11,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:11,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:11,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 1106 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:11,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:11,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:11,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:13,285 INFO L124 PetriNetUnfolderBase]: 1623/2494 cut-off events. [2024-06-14 13:14:13,285 INFO L125 PetriNetUnfolderBase]: For 40821/40821 co-relation queries the response was YES. [2024-06-14 13:14:13,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12979 conditions, 2494 events. 1623/2494 cut-off events. For 40821/40821 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12282 event pairs, 562 based on Foata normal form. 4/2485 useless extension candidates. Maximal degree in co-relation 12933. Up to 2010 conditions per place. [2024-06-14 13:14:13,299 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 81 selfloop transitions, 59 changer transitions 0/145 dead transitions. [2024-06-14 13:14:13,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 145 transitions, 1480 flow [2024-06-14 13:14:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:13,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:14:13,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 13:14:13,301 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 1106 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:14:13,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 145 transitions, 1480 flow [2024-06-14 13:14:13,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 145 transitions, 1276 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:13,326 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 1028 flow [2024-06-14 13:14:13,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1028, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-06-14 13:14:13,326 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-14 13:14:13,327 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 1028 flow [2024-06-14 13:14:13,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:13,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:13,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:13,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:14:13,327 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:13,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:13,328 INFO L85 PathProgramCache]: Analyzing trace with hash 773205366, now seen corresponding path program 2 times [2024-06-14 13:14:13,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:13,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422387450] [2024-06-14 13:14:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:13,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:15,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:15,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422387450] [2024-06-14 13:14:15,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422387450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:15,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:15,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:15,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994015311] [2024-06-14 13:14:15,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:15,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:15,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:15,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:15,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:15,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:15,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 1028 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:15,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:15,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:15,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:17,084 INFO L124 PetriNetUnfolderBase]: 1643/2558 cut-off events. [2024-06-14 13:14:17,084 INFO L125 PetriNetUnfolderBase]: For 42645/42653 co-relation queries the response was YES. [2024-06-14 13:14:17,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13220 conditions, 2558 events. 1643/2558 cut-off events. For 42645/42653 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12802 event pairs, 496 based on Foata normal form. 12/2566 useless extension candidates. Maximal degree in co-relation 13174. Up to 2236 conditions per place. [2024-06-14 13:14:17,099 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 97 selfloop transitions, 41 changer transitions 0/143 dead transitions. [2024-06-14 13:14:17,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 143 transitions, 1410 flow [2024-06-14 13:14:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:17,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:14:17,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 13:14:17,101 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 1028 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:14:17,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 143 transitions, 1410 flow [2024-06-14 13:14:17,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 143 transitions, 1177 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-14 13:14:17,134 INFO L231 Difference]: Finished difference. Result has 99 places, 115 transitions, 913 flow [2024-06-14 13:14:17,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=913, PETRI_PLACES=99, PETRI_TRANSITIONS=115} [2024-06-14 13:14:17,134 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-14 13:14:17,135 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 115 transitions, 913 flow [2024-06-14 13:14:17,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:17,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:17,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:17,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:14:17,135 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)] === [2024-06-14 13:14:17,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:17,135 INFO L85 PathProgramCache]: Analyzing trace with hash 785107150, now seen corresponding path program 3 times [2024-06-14 13:14:17,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:17,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771357380] [2024-06-14 13:14:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:17,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:19,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:19,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771357380] [2024-06-14 13:14:19,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771357380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:19,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:19,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:19,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145920305] [2024-06-14 13:14:19,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:19,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:19,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:19,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:19,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:19,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:19,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 115 transitions, 913 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:19,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:19,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:19,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:20,685 INFO L124 PetriNetUnfolderBase]: 1635/2546 cut-off events. [2024-06-14 13:14:20,685 INFO L125 PetriNetUnfolderBase]: For 44752/44760 co-relation queries the response was YES. [2024-06-14 13:14:20,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12993 conditions, 2546 events. 1635/2546 cut-off events. For 44752/44760 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12736 event pairs, 468 based on Foata normal form. 12/2554 useless extension candidates. Maximal degree in co-relation 12949. Up to 2142 conditions per place. [2024-06-14 13:14:20,700 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 94 selfloop transitions, 46 changer transitions 0/145 dead transitions. [2024-06-14 13:14:20,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 145 transitions, 1301 flow [2024-06-14 13:14:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 13:14:20,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 13:14:20,702 INFO L175 Difference]: Start difference. First operand has 99 places, 115 transitions, 913 flow. Second operand 7 states and 128 transitions. [2024-06-14 13:14:20,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 145 transitions, 1301 flow [2024-06-14 13:14:20,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 145 transitions, 1203 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:20,729 INFO L231 Difference]: Finished difference. Result has 101 places, 117 transitions, 946 flow [2024-06-14 13:14:20,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=946, PETRI_PLACES=101, PETRI_TRANSITIONS=117} [2024-06-14 13:14:20,730 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-14 13:14:20,730 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 117 transitions, 946 flow [2024-06-14 13:14:20,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:20,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:20,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:20,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:14:20,730 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:20,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:20,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1565752744, now seen corresponding path program 1 times [2024-06-14 13:14:20,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:20,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111539365] [2024-06-14 13:14:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:20,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:22,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:22,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111539365] [2024-06-14 13:14:22,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111539365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:22,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:22,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:14:22,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660411679] [2024-06-14 13:14:22,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:22,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:14:22,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:22,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:14:22,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:14:22,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:22,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 117 transitions, 946 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:22,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:22,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:22,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:23,942 INFO L124 PetriNetUnfolderBase]: 1657/2565 cut-off events. [2024-06-14 13:14:23,942 INFO L125 PetriNetUnfolderBase]: For 48746/48746 co-relation queries the response was YES. [2024-06-14 13:14:23,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13374 conditions, 2565 events. 1657/2565 cut-off events. For 48746/48746 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12662 event pairs, 529 based on Foata normal form. 6/2565 useless extension candidates. Maximal degree in co-relation 13329. Up to 2356 conditions per place. [2024-06-14 13:14:23,958 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 117 selfloop transitions, 20 changer transitions 0/142 dead transitions. [2024-06-14 13:14:23,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 142 transitions, 1376 flow [2024-06-14 13:14:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:14:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:14:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:14:23,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:14:23,959 INFO L175 Difference]: Start difference. First operand has 101 places, 117 transitions, 946 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:14:23,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 142 transitions, 1376 flow [2024-06-14 13:14:23,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 1263 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:23,995 INFO L231 Difference]: Finished difference. Result has 103 places, 125 transitions, 952 flow [2024-06-14 13:14:23,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=952, PETRI_PLACES=103, PETRI_TRANSITIONS=125} [2024-06-14 13:14:23,995 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-14 13:14:23,995 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 125 transitions, 952 flow [2024-06-14 13:14:23,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:23,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:23,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:23,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:14:23,996 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)] === [2024-06-14 13:14:23,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:23,996 INFO L85 PathProgramCache]: Analyzing trace with hash 650686813, now seen corresponding path program 1 times [2024-06-14 13:14:23,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:23,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767620402] [2024-06-14 13:14:23,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:23,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:25,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:25,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767620402] [2024-06-14 13:14:25,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767620402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:25,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:25,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:25,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827949658] [2024-06-14 13:14:25,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:25,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:25,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:25,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:25,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:25,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 125 transitions, 952 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:25,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:25,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:25,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:27,225 INFO L124 PetriNetUnfolderBase]: 1905/2983 cut-off events. [2024-06-14 13:14:27,225 INFO L125 PetriNetUnfolderBase]: For 59637/59637 co-relation queries the response was YES. [2024-06-14 13:14:27,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16043 conditions, 2983 events. 1905/2983 cut-off events. For 59637/59637 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15534 event pairs, 584 based on Foata normal form. 4/2986 useless extension candidates. Maximal degree in co-relation 15996. Up to 2445 conditions per place. [2024-06-14 13:14:27,240 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 167 selfloop transitions, 34 changer transitions 0/206 dead transitions. [2024-06-14 13:14:27,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 206 transitions, 1777 flow [2024-06-14 13:14:27,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:14:27,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:14:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-14 13:14:27,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43388429752066116 [2024-06-14 13:14:27,243 INFO L175 Difference]: Start difference. First operand has 103 places, 125 transitions, 952 flow. Second operand 11 states and 210 transitions. [2024-06-14 13:14:27,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 206 transitions, 1777 flow [2024-06-14 13:14:27,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 206 transitions, 1741 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:14:27,289 INFO L231 Difference]: Finished difference. Result has 115 places, 141 transitions, 1161 flow [2024-06-14 13:14:27,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1161, PETRI_PLACES=115, PETRI_TRANSITIONS=141} [2024-06-14 13:14:27,290 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-14 13:14:27,290 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 141 transitions, 1161 flow [2024-06-14 13:14:27,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:27,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:27,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:27,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:14:27,290 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)] === [2024-06-14 13:14:27,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:27,291 INFO L85 PathProgramCache]: Analyzing trace with hash 995111253, now seen corresponding path program 2 times [2024-06-14 13:14:27,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:27,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253844870] [2024-06-14 13:14:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:27,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:29,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:29,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253844870] [2024-06-14 13:14:29,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253844870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:29,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:29,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:29,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783807829] [2024-06-14 13:14:29,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:29,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:29,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:29,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:30,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:30,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 141 transitions, 1161 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:30,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:30,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:30,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:31,530 INFO L124 PetriNetUnfolderBase]: 2077/3263 cut-off events. [2024-06-14 13:14:31,530 INFO L125 PetriNetUnfolderBase]: For 75741/75741 co-relation queries the response was YES. [2024-06-14 13:14:31,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18662 conditions, 3263 events. 2077/3263 cut-off events. For 75741/75741 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17434 event pairs, 488 based on Foata normal form. 4/3266 useless extension candidates. Maximal degree in co-relation 18610. Up to 2411 conditions per place. [2024-06-14 13:14:31,552 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 154 selfloop transitions, 36 changer transitions 0/195 dead transitions. [2024-06-14 13:14:31,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 195 transitions, 1885 flow [2024-06-14 13:14:31,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 13:14:31,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-14 13:14:31,554 INFO L175 Difference]: Start difference. First operand has 115 places, 141 transitions, 1161 flow. Second operand 9 states and 172 transitions. [2024-06-14 13:14:31,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 195 transitions, 1885 flow [2024-06-14 13:14:31,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 195 transitions, 1823 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 13:14:31,607 INFO L231 Difference]: Finished difference. Result has 120 places, 144 transitions, 1249 flow [2024-06-14 13:14:31,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1249, PETRI_PLACES=120, PETRI_TRANSITIONS=144} [2024-06-14 13:14:31,608 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 75 predicate places. [2024-06-14 13:14:31,608 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 144 transitions, 1249 flow [2024-06-14 13:14:31,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:31,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:31,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:31,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:14:31,608 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)] === [2024-06-14 13:14:31,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:31,609 INFO L85 PathProgramCache]: Analyzing trace with hash 997968213, now seen corresponding path program 3 times [2024-06-14 13:14:31,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:31,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275217618] [2024-06-14 13:14:31,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:34,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:34,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275217618] [2024-06-14 13:14:34,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275217618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:34,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:34,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:34,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984792389] [2024-06-14 13:14:34,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:34,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:34,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:34,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:34,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:34,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:34,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 144 transitions, 1249 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:34,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:34,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:34,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:35,830 INFO L124 PetriNetUnfolderBase]: 2061/3237 cut-off events. [2024-06-14 13:14:35,831 INFO L125 PetriNetUnfolderBase]: For 80518/80518 co-relation queries the response was YES. [2024-06-14 13:14:35,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18787 conditions, 3237 events. 2061/3237 cut-off events. For 80518/80518 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17274 event pairs, 640 based on Foata normal form. 8/3244 useless extension candidates. Maximal degree in co-relation 18733. Up to 2963 conditions per place. [2024-06-14 13:14:35,854 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 156 selfloop transitions, 30 changer transitions 0/191 dead transitions. [2024-06-14 13:14:35,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 191 transitions, 1841 flow [2024-06-14 13:14:35,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:14:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:14:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:14:35,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 13:14:35,856 INFO L175 Difference]: Start difference. First operand has 120 places, 144 transitions, 1249 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:14:35,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 191 transitions, 1841 flow [2024-06-14 13:14:35,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 191 transitions, 1759 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:14:35,907 INFO L231 Difference]: Finished difference. Result has 124 places, 147 transitions, 1309 flow [2024-06-14 13:14:35,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1309, PETRI_PLACES=124, PETRI_TRANSITIONS=147} [2024-06-14 13:14:35,908 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-14 13:14:35,908 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 147 transitions, 1309 flow [2024-06-14 13:14:35,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:35,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:35,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:35,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:14:35,909 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)] === [2024-06-14 13:14:35,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:35,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1965887507, now seen corresponding path program 4 times [2024-06-14 13:14:35,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:35,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210825440] [2024-06-14 13:14:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:35,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:38,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:38,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210825440] [2024-06-14 13:14:38,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210825440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:38,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:38,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:38,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477099398] [2024-06-14 13:14:38,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:38,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:38,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:38,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:38,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:38,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:38,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 147 transitions, 1309 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:38,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:38,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:38,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:40,304 INFO L124 PetriNetUnfolderBase]: 2081/3281 cut-off events. [2024-06-14 13:14:40,304 INFO L125 PetriNetUnfolderBase]: For 79333/79333 co-relation queries the response was YES. [2024-06-14 13:14:40,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19017 conditions, 3281 events. 2081/3281 cut-off events. For 79333/79333 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17589 event pairs, 537 based on Foata normal form. 4/3283 useless extension candidates. Maximal degree in co-relation 18961. Up to 2686 conditions per place. [2024-06-14 13:14:40,329 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 115 selfloop transitions, 66 changer transitions 0/186 dead transitions. [2024-06-14 13:14:40,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 186 transitions, 1842 flow [2024-06-14 13:14:40,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:14:40,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 13:14:40,330 INFO L175 Difference]: Start difference. First operand has 124 places, 147 transitions, 1309 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:14:40,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 186 transitions, 1842 flow [2024-06-14 13:14:40,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 186 transitions, 1741 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 13:14:40,389 INFO L231 Difference]: Finished difference. Result has 125 places, 149 transitions, 1393 flow [2024-06-14 13:14:40,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1393, PETRI_PLACES=125, PETRI_TRANSITIONS=149} [2024-06-14 13:14:40,390 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-14 13:14:40,390 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 149 transitions, 1393 flow [2024-06-14 13:14:40,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:40,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:40,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:40,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:14:40,390 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:40,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:40,391 INFO L85 PathProgramCache]: Analyzing trace with hash -27646265, now seen corresponding path program 1 times [2024-06-14 13:14:40,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:40,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771760559] [2024-06-14 13:14:40,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:40,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:42,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:42,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771760559] [2024-06-14 13:14:42,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771760559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:42,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:42,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:14:42,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494002611] [2024-06-14 13:14:42,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:42,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:14:42,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:42,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:14:42,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:14:42,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:42,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 149 transitions, 1393 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:42,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:42,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:42,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:43,625 INFO L124 PetriNetUnfolderBase]: 2091/3288 cut-off events. [2024-06-14 13:14:43,626 INFO L125 PetriNetUnfolderBase]: For 84761/84761 co-relation queries the response was YES. [2024-06-14 13:14:43,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19401 conditions, 3288 events. 2091/3288 cut-off events. For 84761/84761 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17608 event pairs, 606 based on Foata normal form. 2/3289 useless extension candidates. Maximal degree in co-relation 19344. Up to 3039 conditions per place. [2024-06-14 13:14:43,644 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 146 selfloop transitions, 26 changer transitions 0/177 dead transitions. [2024-06-14 13:14:43,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 177 transitions, 1919 flow [2024-06-14 13:14:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:14:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:14:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 13:14:43,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 13:14:43,646 INFO L175 Difference]: Start difference. First operand has 125 places, 149 transitions, 1393 flow. Second operand 6 states and 117 transitions. [2024-06-14 13:14:43,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 177 transitions, 1919 flow [2024-06-14 13:14:43,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 1752 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:43,699 INFO L231 Difference]: Finished difference. Result has 125 places, 152 transitions, 1315 flow [2024-06-14 13:14:43,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1315, PETRI_PLACES=125, PETRI_TRANSITIONS=152} [2024-06-14 13:14:43,700 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-14 13:14:43,700 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 152 transitions, 1315 flow [2024-06-14 13:14:43,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:43,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:43,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:43,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:14:43,700 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)] === [2024-06-14 13:14:43,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:43,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1291572907, now seen corresponding path program 5 times [2024-06-14 13:14:43,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:43,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208367623] [2024-06-14 13:14:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:43,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:46,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:46,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208367623] [2024-06-14 13:14:46,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208367623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:46,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:46,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:14:46,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689381175] [2024-06-14 13:14:46,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:46,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:14:46,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:46,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:14:46,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:14:46,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:46,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 152 transitions, 1315 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:46,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:46,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:46,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:47,767 INFO L124 PetriNetUnfolderBase]: 2083/3256 cut-off events. [2024-06-14 13:14:47,767 INFO L125 PetriNetUnfolderBase]: For 87417/87417 co-relation queries the response was YES. [2024-06-14 13:14:47,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19036 conditions, 3256 events. 2083/3256 cut-off events. For 87417/87417 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17292 event pairs, 627 based on Foata normal form. 4/3245 useless extension candidates. Maximal degree in co-relation 18978. Up to 2688 conditions per place. [2024-06-14 13:14:47,786 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 113 selfloop transitions, 69 changer transitions 0/187 dead transitions. [2024-06-14 13:14:47,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 187 transitions, 1842 flow [2024-06-14 13:14:47,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:14:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:14:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:14:47,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-14 13:14:47,788 INFO L175 Difference]: Start difference. First operand has 125 places, 152 transitions, 1315 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:14:47,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 187 transitions, 1842 flow [2024-06-14 13:14:47,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 187 transitions, 1801 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:14:47,837 INFO L231 Difference]: Finished difference. Result has 130 places, 154 transitions, 1469 flow [2024-06-14 13:14:47,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1469, PETRI_PLACES=130, PETRI_TRANSITIONS=154} [2024-06-14 13:14:47,838 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-14 13:14:47,838 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 154 transitions, 1469 flow [2024-06-14 13:14:47,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:47,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:47,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:47,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:14:47,838 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:47,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:47,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1293682343, now seen corresponding path program 2 times [2024-06-14 13:14:47,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:47,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042267571] [2024-06-14 13:14:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:47,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:49,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:49,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042267571] [2024-06-14 13:14:49,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042267571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:49,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:49,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:14:49,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046088449] [2024-06-14 13:14:49,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:49,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:14:49,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:49,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:14:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:14:49,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:49,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 154 transitions, 1469 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:49,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:49,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:49,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:51,211 INFO L124 PetriNetUnfolderBase]: 2057/3225 cut-off events. [2024-06-14 13:14:51,212 INFO L125 PetriNetUnfolderBase]: For 93491/93491 co-relation queries the response was YES. [2024-06-14 13:14:51,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19260 conditions, 3225 events. 2057/3225 cut-off events. For 93491/93491 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17084 event pairs, 587 based on Foata normal form. 6/3223 useless extension candidates. Maximal degree in co-relation 19201. Up to 3008 conditions per place. [2024-06-14 13:14:51,232 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 140 selfloop transitions, 25 changer transitions 0/170 dead transitions. [2024-06-14 13:14:51,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 170 transitions, 1865 flow [2024-06-14 13:14:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:14:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:14:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:14:51,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053030303030303 [2024-06-14 13:14:51,233 INFO L175 Difference]: Start difference. First operand has 130 places, 154 transitions, 1469 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:14:51,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 170 transitions, 1865 flow [2024-06-14 13:14:51,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 170 transitions, 1676 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:51,296 INFO L231 Difference]: Finished difference. Result has 130 places, 154 transitions, 1338 flow [2024-06-14 13:14:51,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1338, PETRI_PLACES=130, PETRI_TRANSITIONS=154} [2024-06-14 13:14:51,297 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-14 13:14:51,297 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 154 transitions, 1338 flow [2024-06-14 13:14:51,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:51,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:51,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:51,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:14:51,297 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:51,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:51,298 INFO L85 PathProgramCache]: Analyzing trace with hash -689303217, now seen corresponding path program 1 times [2024-06-14 13:14:51,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:51,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103109171] [2024-06-14 13:14:51,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:51,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:53,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:53,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103109171] [2024-06-14 13:14:53,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103109171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:53,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:53,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:14:53,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136510056] [2024-06-14 13:14:53,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:53,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:14:53,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:53,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:14:53,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:14:53,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:53,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 154 transitions, 1338 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) [2024-06-14 13:14:53,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:53,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:53,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:54,922 INFO L124 PetriNetUnfolderBase]: 2062/3261 cut-off events. [2024-06-14 13:14:54,922 INFO L125 PetriNetUnfolderBase]: For 94216/94216 co-relation queries the response was YES. [2024-06-14 13:14:54,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19075 conditions, 3261 events. 2062/3261 cut-off events. For 94216/94216 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17534 event pairs, 645 based on Foata normal form. 1/3260 useless extension candidates. Maximal degree in co-relation 19015. Up to 3079 conditions per place. [2024-06-14 13:14:54,941 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 155 selfloop transitions, 21 changer transitions 0/181 dead transitions. [2024-06-14 13:14:54,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 181 transitions, 1968 flow [2024-06-14 13:14:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:14:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:14:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 13:14:54,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:14:54,942 INFO L175 Difference]: Start difference. First operand has 130 places, 154 transitions, 1338 flow. Second operand 6 states and 108 transitions. [2024-06-14 13:14:54,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 181 transitions, 1968 flow [2024-06-14 13:14:54,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 181 transitions, 1893 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:14:54,999 INFO L231 Difference]: Finished difference. Result has 131 places, 163 transitions, 1437 flow [2024-06-14 13:14:54,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1437, PETRI_PLACES=131, PETRI_TRANSITIONS=163} [2024-06-14 13:14:55,000 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-14 13:14:55,000 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 163 transitions, 1437 flow [2024-06-14 13:14:55,000 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) [2024-06-14 13:14:55,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:55,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:55,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:14:55,001 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:14:55,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:55,001 INFO L85 PathProgramCache]: Analyzing trace with hash 2123964457, now seen corresponding path program 2 times [2024-06-14 13:14:55,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:55,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732881348] [2024-06-14 13:14:55,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:55,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:14:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:14:57,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:14:57,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732881348] [2024-06-14 13:14:57,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732881348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:14:57,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:14:57,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:14:57,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435994425] [2024-06-14 13:14:57,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:14:57,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:14:57,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:14:57,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:14:57,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:14:57,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:14:57,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 163 transitions, 1437 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:57,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:14:57,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:14:57,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:14:58,171 INFO L124 PetriNetUnfolderBase]: 2075/3264 cut-off events. [2024-06-14 13:14:58,171 INFO L125 PetriNetUnfolderBase]: For 100496/100496 co-relation queries the response was YES. [2024-06-14 13:14:58,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19694 conditions, 3264 events. 2075/3264 cut-off events. For 100496/100496 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17453 event pairs, 669 based on Foata normal form. 1/3264 useless extension candidates. Maximal degree in co-relation 19632. Up to 3141 conditions per place. [2024-06-14 13:14:58,193 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 161 selfloop transitions, 14 changer transitions 0/180 dead transitions. [2024-06-14 13:14:58,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 180 transitions, 1922 flow [2024-06-14 13:14:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:14:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:14:58,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:14:58,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-14 13:14:58,194 INFO L175 Difference]: Start difference. First operand has 131 places, 163 transitions, 1437 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:14:58,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 180 transitions, 1922 flow [2024-06-14 13:14:58,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 180 transitions, 1850 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-14 13:14:58,280 INFO L231 Difference]: Finished difference. Result has 138 places, 166 transitions, 1442 flow [2024-06-14 13:14:58,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1442, PETRI_PLACES=138, PETRI_TRANSITIONS=166} [2024-06-14 13:14:58,280 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-14 13:14:58,281 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 166 transitions, 1442 flow [2024-06-14 13:14:58,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:14:58,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:14:58,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:14:58,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:14:58,281 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)] === [2024-06-14 13:14:58,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:14:58,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1791001337, now seen corresponding path program 1 times [2024-06-14 13:14:58,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:14:58,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881936143] [2024-06-14 13:14:58,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:14:58,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:14:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:00,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:00,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881936143] [2024-06-14 13:15:00,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881936143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:00,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:00,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:00,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825835328] [2024-06-14 13:15:00,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:00,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:00,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:00,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:00,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:00,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:00,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 166 transitions, 1442 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:00,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:00,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:00,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:02,415 INFO L124 PetriNetUnfolderBase]: 2211/3498 cut-off events. [2024-06-14 13:15:02,416 INFO L125 PetriNetUnfolderBase]: For 121874/121874 co-relation queries the response was YES. [2024-06-14 13:15:02,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20723 conditions, 3498 events. 2211/3498 cut-off events. For 121874/121874 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19075 event pairs, 474 based on Foata normal form. 32/3529 useless extension candidates. Maximal degree in co-relation 20657. Up to 2462 conditions per place. [2024-06-14 13:15:02,442 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 177 selfloop transitions, 39 changer transitions 0/221 dead transitions. [2024-06-14 13:15:02,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 221 transitions, 2217 flow [2024-06-14 13:15:02,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:02,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 13:15:02,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 13:15:02,443 INFO L175 Difference]: Start difference. First operand has 138 places, 166 transitions, 1442 flow. Second operand 9 states and 174 transitions. [2024-06-14 13:15:02,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 221 transitions, 2217 flow [2024-06-14 13:15:02,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 221 transitions, 2179 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 13:15:02,537 INFO L231 Difference]: Finished difference. Result has 142 places, 168 transitions, 1540 flow [2024-06-14 13:15:02,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1540, PETRI_PLACES=142, PETRI_TRANSITIONS=168} [2024-06-14 13:15:02,537 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 97 predicate places. [2024-06-14 13:15:02,537 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 168 transitions, 1540 flow [2024-06-14 13:15:02,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:02,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:02,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:02,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:15:02,538 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)] === [2024-06-14 13:15:02,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:02,538 INFO L85 PathProgramCache]: Analyzing trace with hash 841270447, now seen corresponding path program 2 times [2024-06-14 13:15:02,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:02,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61719898] [2024-06-14 13:15:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:02,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:05,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:05,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61719898] [2024-06-14 13:15:05,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61719898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:05,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:05,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:05,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632284222] [2024-06-14 13:15:05,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:05,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:05,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:05,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:05,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 168 transitions, 1540 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:05,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:05,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:05,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:06,721 INFO L124 PetriNetUnfolderBase]: 2139/3381 cut-off events. [2024-06-14 13:15:06,721 INFO L125 PetriNetUnfolderBase]: For 114494/114494 co-relation queries the response was YES. [2024-06-14 13:15:06,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19521 conditions, 3381 events. 2139/3381 cut-off events. For 114494/114494 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18270 event pairs, 604 based on Foata normal form. 40/3420 useless extension candidates. Maximal degree in co-relation 19454. Up to 2858 conditions per place. [2024-06-14 13:15:06,744 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 182 selfloop transitions, 29 changer transitions 0/216 dead transitions. [2024-06-14 13:15:06,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 216 transitions, 2133 flow [2024-06-14 13:15:06,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:15:06,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-14 13:15:06,745 INFO L175 Difference]: Start difference. First operand has 142 places, 168 transitions, 1540 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:15:06,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 216 transitions, 2133 flow [2024-06-14 13:15:06,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 216 transitions, 2023 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:06,867 INFO L231 Difference]: Finished difference. Result has 145 places, 168 transitions, 1498 flow [2024-06-14 13:15:06,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1498, PETRI_PLACES=145, PETRI_TRANSITIONS=168} [2024-06-14 13:15:06,867 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-14 13:15:06,868 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 168 transitions, 1498 flow [2024-06-14 13:15:06,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:06,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:06,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:06,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:15:06,868 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)] === [2024-06-14 13:15:06,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:06,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1047011239, now seen corresponding path program 3 times [2024-06-14 13:15:06,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:06,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243118957] [2024-06-14 13:15:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:06,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:09,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:09,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243118957] [2024-06-14 13:15:09,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243118957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:09,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:09,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:09,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239551143] [2024-06-14 13:15:09,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:09,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:09,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:09,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:09,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:09,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:09,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 168 transitions, 1498 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:09,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:09,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:09,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:11,669 INFO L124 PetriNetUnfolderBase]: 2227/3540 cut-off events. [2024-06-14 13:15:11,669 INFO L125 PetriNetUnfolderBase]: For 111458/111458 co-relation queries the response was YES. [2024-06-14 13:15:11,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19935 conditions, 3540 events. 2227/3540 cut-off events. For 111458/111458 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19459 event pairs, 527 based on Foata normal form. 20/3558 useless extension candidates. Maximal degree in co-relation 19867. Up to 2821 conditions per place. [2024-06-14 13:15:11,695 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 146 selfloop transitions, 65 changer transitions 0/216 dead transitions. [2024-06-14 13:15:11,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 216 transitions, 2115 flow [2024-06-14 13:15:11,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 13:15:11,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:15:11,697 INFO L175 Difference]: Start difference. First operand has 145 places, 168 transitions, 1498 flow. Second operand 9 states and 171 transitions. [2024-06-14 13:15:11,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 216 transitions, 2115 flow [2024-06-14 13:15:11,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 216 transitions, 2016 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 13:15:11,791 INFO L231 Difference]: Finished difference. Result has 145 places, 169 transitions, 1566 flow [2024-06-14 13:15:11,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1566, PETRI_PLACES=145, PETRI_TRANSITIONS=169} [2024-06-14 13:15:11,791 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-14 13:15:11,791 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 169 transitions, 1566 flow [2024-06-14 13:15:11,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:11,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:11,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:11,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:15:11,792 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)] === [2024-06-14 13:15:11,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:11,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1583530745, now seen corresponding path program 4 times [2024-06-14 13:15:11,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:11,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450612435] [2024-06-14 13:15:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:11,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:14,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:14,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450612435] [2024-06-14 13:15:14,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450612435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:14,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:14,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:14,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916887301] [2024-06-14 13:15:14,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:14,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:14,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:14,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:14,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:14,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:14,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 169 transitions, 1566 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:14,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:14,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:14,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:16,655 INFO L124 PetriNetUnfolderBase]: 2295/3656 cut-off events. [2024-06-14 13:15:16,655 INFO L125 PetriNetUnfolderBase]: For 117101/117101 co-relation queries the response was YES. [2024-06-14 13:15:16,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20642 conditions, 3656 events. 2295/3656 cut-off events. For 117101/117101 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 20308 event pairs, 511 based on Foata normal form. 16/3670 useless extension candidates. Maximal degree in co-relation 20573. Up to 2803 conditions per place. [2024-06-14 13:15:16,683 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 153 selfloop transitions, 68 changer transitions 0/226 dead transitions. [2024-06-14 13:15:16,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 226 transitions, 2235 flow [2024-06-14 13:15:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:16,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:16,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 13:15:16,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:15:16,684 INFO L175 Difference]: Start difference. First operand has 145 places, 169 transitions, 1566 flow. Second operand 10 states and 190 transitions. [2024-06-14 13:15:16,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 226 transitions, 2235 flow [2024-06-14 13:15:16,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 226 transitions, 2086 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:15:16,784 INFO L231 Difference]: Finished difference. Result has 148 places, 170 transitions, 1591 flow [2024-06-14 13:15:16,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1591, PETRI_PLACES=148, PETRI_TRANSITIONS=170} [2024-06-14 13:15:16,785 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-14 13:15:16,785 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 170 transitions, 1591 flow [2024-06-14 13:15:16,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:16,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:16,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:16,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:15:16,786 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:16,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:16,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1384081085, now seen corresponding path program 5 times [2024-06-14 13:15:16,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:16,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79247623] [2024-06-14 13:15:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:16,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:19,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:19,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79247623] [2024-06-14 13:15:19,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79247623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:19,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:19,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:19,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790485062] [2024-06-14 13:15:19,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:19,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:19,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:19,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:19,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 170 transitions, 1591 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:19,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:19,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:19,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:21,122 INFO L124 PetriNetUnfolderBase]: 2383/3816 cut-off events. [2024-06-14 13:15:21,122 INFO L125 PetriNetUnfolderBase]: For 126120/126124 co-relation queries the response was YES. [2024-06-14 13:15:21,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21399 conditions, 3816 events. 2383/3816 cut-off events. For 126120/126124 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21608 event pairs, 539 based on Foata normal form. 24/3838 useless extension candidates. Maximal degree in co-relation 21329. Up to 3085 conditions per place. [2024-06-14 13:15:21,147 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 143 selfloop transitions, 66 changer transitions 0/214 dead transitions. [2024-06-14 13:15:21,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 214 transitions, 2192 flow [2024-06-14 13:15:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:15:21,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 13:15:21,149 INFO L175 Difference]: Start difference. First operand has 148 places, 170 transitions, 1591 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:15:21,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 214 transitions, 2192 flow [2024-06-14 13:15:21,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 214 transitions, 2030 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:21,245 INFO L231 Difference]: Finished difference. Result has 148 places, 171 transitions, 1602 flow [2024-06-14 13:15:21,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1602, PETRI_PLACES=148, PETRI_TRANSITIONS=171} [2024-06-14 13:15:21,245 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-14 13:15:21,246 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 171 transitions, 1602 flow [2024-06-14 13:15:21,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:21,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:21,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:21,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:15:21,246 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)] === [2024-06-14 13:15:21,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:21,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1052588821, now seen corresponding path program 1 times [2024-06-14 13:15:21,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:21,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640363471] [2024-06-14 13:15:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:21,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:24,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:24,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640363471] [2024-06-14 13:15:24,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640363471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:24,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:24,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:24,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661044163] [2024-06-14 13:15:24,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:24,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:24,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:24,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:24,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:24,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:24,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 171 transitions, 1602 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:24,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:24,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:24,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:25,887 INFO L124 PetriNetUnfolderBase]: 2555/4098 cut-off events. [2024-06-14 13:15:25,888 INFO L125 PetriNetUnfolderBase]: For 142706/142710 co-relation queries the response was YES. [2024-06-14 13:15:25,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23478 conditions, 4098 events. 2555/4098 cut-off events. For 142706/142710 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23658 event pairs, 565 based on Foata normal form. 16/4112 useless extension candidates. Maximal degree in co-relation 23407. Up to 2627 conditions per place. [2024-06-14 13:15:25,974 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 145 selfloop transitions, 70 changer transitions 0/220 dead transitions. [2024-06-14 13:15:25,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 220 transitions, 2397 flow [2024-06-14 13:15:25,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 13:15:25,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 13:15:25,976 INFO L175 Difference]: Start difference. First operand has 148 places, 171 transitions, 1602 flow. Second operand 8 states and 159 transitions. [2024-06-14 13:15:25,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 220 transitions, 2397 flow [2024-06-14 13:15:26,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 220 transitions, 2242 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:26,077 INFO L231 Difference]: Finished difference. Result has 150 places, 173 transitions, 1663 flow [2024-06-14 13:15:26,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1663, PETRI_PLACES=150, PETRI_TRANSITIONS=173} [2024-06-14 13:15:26,078 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 105 predicate places. [2024-06-14 13:15:26,078 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 173 transitions, 1663 flow [2024-06-14 13:15:26,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:26,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:26,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:26,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:15:26,079 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)] === [2024-06-14 13:15:26,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:26,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1995719603, now seen corresponding path program 6 times [2024-06-14 13:15:26,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:26,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933231553] [2024-06-14 13:15:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:26,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:28,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:28,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933231553] [2024-06-14 13:15:28,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933231553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:28,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:28,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:15:28,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460380102] [2024-06-14 13:15:28,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:28,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:15:28,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:28,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:15:28,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:15:28,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:28,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 173 transitions, 1663 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:28,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:28,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:28,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:30,266 INFO L124 PetriNetUnfolderBase]: 2643/4248 cut-off events. [2024-06-14 13:15:30,266 INFO L125 PetriNetUnfolderBase]: For 155658/155666 co-relation queries the response was YES. [2024-06-14 13:15:30,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24295 conditions, 4248 events. 2643/4248 cut-off events. For 155658/155666 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24846 event pairs, 650 based on Foata normal form. 28/4268 useless extension candidates. Maximal degree in co-relation 24223. Up to 3521 conditions per place. [2024-06-14 13:15:30,298 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 144 selfloop transitions, 64 changer transitions 0/213 dead transitions. [2024-06-14 13:15:30,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 213 transitions, 2254 flow [2024-06-14 13:15:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:30,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:15:30,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 13:15:30,299 INFO L175 Difference]: Start difference. First operand has 150 places, 173 transitions, 1663 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:15:30,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 213 transitions, 2254 flow [2024-06-14 13:15:30,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 213 transitions, 2149 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:15:30,454 INFO L231 Difference]: Finished difference. Result has 154 places, 174 transitions, 1731 flow [2024-06-14 13:15:30,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1731, PETRI_PLACES=154, PETRI_TRANSITIONS=174} [2024-06-14 13:15:30,455 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-14 13:15:30,455 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 174 transitions, 1731 flow [2024-06-14 13:15:30,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:30,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:30,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:30,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:15:30,456 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)] === [2024-06-14 13:15:30,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:30,456 INFO L85 PathProgramCache]: Analyzing trace with hash 416091665, now seen corresponding path program 7 times [2024-06-14 13:15:30,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:30,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324172419] [2024-06-14 13:15:30,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:30,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:33,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:33,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324172419] [2024-06-14 13:15:33,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324172419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:33,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:33,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:33,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987158751] [2024-06-14 13:15:33,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:33,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:33,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:33,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:33,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:33,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:33,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 174 transitions, 1731 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:33,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:33,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:33,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:35,132 INFO L124 PetriNetUnfolderBase]: 2607/4176 cut-off events. [2024-06-14 13:15:35,133 INFO L125 PetriNetUnfolderBase]: For 149117/149117 co-relation queries the response was YES. [2024-06-14 13:15:35,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23591 conditions, 4176 events. 2607/4176 cut-off events. For 149117/149117 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24205 event pairs, 692 based on Foata normal form. 20/4182 useless extension candidates. Maximal degree in co-relation 23517. Up to 3465 conditions per place. [2024-06-14 13:15:35,161 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 144 selfloop transitions, 68 changer transitions 0/217 dead transitions. [2024-06-14 13:15:35,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 217 transitions, 2310 flow [2024-06-14 13:15:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:15:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:15:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-14 13:15:35,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 13:15:35,163 INFO L175 Difference]: Start difference. First operand has 154 places, 174 transitions, 1731 flow. Second operand 9 states and 165 transitions. [2024-06-14 13:15:35,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 217 transitions, 2310 flow [2024-06-14 13:15:35,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 217 transitions, 2139 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:35,311 INFO L231 Difference]: Finished difference. Result has 157 places, 174 transitions, 1703 flow [2024-06-14 13:15:35,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1703, PETRI_PLACES=157, PETRI_TRANSITIONS=174} [2024-06-14 13:15:35,311 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 112 predicate places. [2024-06-14 13:15:35,311 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 174 transitions, 1703 flow [2024-06-14 13:15:35,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:35,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:35,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:35,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:15:35,312 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)] === [2024-06-14 13:15:35,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:35,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1384053035, now seen corresponding path program 8 times [2024-06-14 13:15:35,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:35,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420626944] [2024-06-14 13:15:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:35,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:38,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:38,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420626944] [2024-06-14 13:15:38,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420626944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:38,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:38,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:38,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054008304] [2024-06-14 13:15:38,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:38,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:38,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:38,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:38,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:38,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:38,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 174 transitions, 1703 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:38,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:38,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:38,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:40,115 INFO L124 PetriNetUnfolderBase]: 2619/4204 cut-off events. [2024-06-14 13:15:40,115 INFO L125 PetriNetUnfolderBase]: For 144482/144482 co-relation queries the response was YES. [2024-06-14 13:15:40,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23198 conditions, 4204 events. 2619/4204 cut-off events. For 144482/144482 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24485 event pairs, 672 based on Foata normal form. 16/4206 useless extension candidates. Maximal degree in co-relation 23123. Up to 3359 conditions per place. [2024-06-14 13:15:40,144 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 151 selfloop transitions, 71 changer transitions 0/227 dead transitions. [2024-06-14 13:15:40,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 227 transitions, 2370 flow [2024-06-14 13:15:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:15:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:15:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 13:15:40,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-14 13:15:40,146 INFO L175 Difference]: Start difference. First operand has 157 places, 174 transitions, 1703 flow. Second operand 10 states and 184 transitions. [2024-06-14 13:15:40,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 227 transitions, 2370 flow [2024-06-14 13:15:40,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 227 transitions, 2209 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:40,287 INFO L231 Difference]: Finished difference. Result has 159 places, 175 transitions, 1730 flow [2024-06-14 13:15:40,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1730, PETRI_PLACES=159, PETRI_TRANSITIONS=175} [2024-06-14 13:15:40,287 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-14 13:15:40,287 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 175 transitions, 1730 flow [2024-06-14 13:15:40,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:40,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:40,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:40,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:15:40,288 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)] === [2024-06-14 13:15:40,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash 21052981, now seen corresponding path program 2 times [2024-06-14 13:15:40,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:40,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235185973] [2024-06-14 13:15:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:40,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:43,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:43,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235185973] [2024-06-14 13:15:43,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235185973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:43,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:43,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:43,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480974199] [2024-06-14 13:15:43,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:43,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:43,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:43,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:43,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:43,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:43,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 175 transitions, 1730 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:43,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:43,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:43,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:45,086 INFO L124 PetriNetUnfolderBase]: 2667/4310 cut-off events. [2024-06-14 13:15:45,087 INFO L125 PetriNetUnfolderBase]: For 150515/150523 co-relation queries the response was YES. [2024-06-14 13:15:45,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23735 conditions, 4310 events. 2667/4310 cut-off events. For 150515/150523 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25518 event pairs, 636 based on Foata normal form. 20/4322 useless extension candidates. Maximal degree in co-relation 23659. Up to 3467 conditions per place. [2024-06-14 13:15:45,114 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 148 selfloop transitions, 65 changer transitions 0/218 dead transitions. [2024-06-14 13:15:45,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 218 transitions, 2353 flow [2024-06-14 13:15:45,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 13:15:45,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:15:45,116 INFO L175 Difference]: Start difference. First operand has 159 places, 175 transitions, 1730 flow. Second operand 8 states and 152 transitions. [2024-06-14 13:15:45,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 218 transitions, 2353 flow [2024-06-14 13:15:45,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 218 transitions, 2177 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:45,246 INFO L231 Difference]: Finished difference. Result has 159 places, 176 transitions, 1732 flow [2024-06-14 13:15:45,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1732, PETRI_PLACES=159, PETRI_TRANSITIONS=176} [2024-06-14 13:15:45,247 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-14 13:15:45,247 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 176 transitions, 1732 flow [2024-06-14 13:15:45,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:45,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:45,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:45,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:15:45,247 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)] === [2024-06-14 13:15:45,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1426234483, now seen corresponding path program 3 times [2024-06-14 13:15:45,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:45,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350739315] [2024-06-14 13:15:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:45,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:48,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:48,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350739315] [2024-06-14 13:15:48,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350739315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:48,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:48,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:15:48,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861030819] [2024-06-14 13:15:48,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:48,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:15:48,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:48,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:15:48,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:15:48,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:48,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 176 transitions, 1732 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:48,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:48,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:48,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:49,762 INFO L124 PetriNetUnfolderBase]: 2647/4278 cut-off events. [2024-06-14 13:15:49,762 INFO L125 PetriNetUnfolderBase]: For 145662/145670 co-relation queries the response was YES. [2024-06-14 13:15:49,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22954 conditions, 4278 events. 2647/4278 cut-off events. For 145662/145670 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 25233 event pairs, 587 based on Foata normal form. 20/4290 useless extension candidates. Maximal degree in co-relation 22877. Up to 2455 conditions per place. [2024-06-14 13:15:49,796 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 136 selfloop transitions, 75 changer transitions 0/216 dead transitions. [2024-06-14 13:15:49,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 216 transitions, 2233 flow [2024-06-14 13:15:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:15:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:15:49,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:15:49,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 13:15:49,799 INFO L175 Difference]: Start difference. First operand has 159 places, 176 transitions, 1732 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:15:49,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 216 transitions, 2233 flow [2024-06-14 13:15:49,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 216 transitions, 2071 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:15:49,975 INFO L231 Difference]: Finished difference. Result has 160 places, 175 transitions, 1652 flow [2024-06-14 13:15:49,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1652, PETRI_PLACES=160, PETRI_TRANSITIONS=175} [2024-06-14 13:15:49,975 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 115 predicate places. [2024-06-14 13:15:49,975 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 175 transitions, 1652 flow [2024-06-14 13:15:49,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:49,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:49,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:49,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:15:49,976 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:49,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:49,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2042363139, now seen corresponding path program 1 times [2024-06-14 13:15:49,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:49,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899098715] [2024-06-14 13:15:49,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:49,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:51,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:51,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899098715] [2024-06-14 13:15:51,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899098715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:51,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:51,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:15:51,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618257104] [2024-06-14 13:15:51,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:51,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:15:51,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:51,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:15:51,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:15:51,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:51,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 175 transitions, 1652 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:51,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:51,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:51,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:53,254 INFO L124 PetriNetUnfolderBase]: 2657/4323 cut-off events. [2024-06-14 13:15:53,254 INFO L125 PetriNetUnfolderBase]: For 143209/143211 co-relation queries the response was YES. [2024-06-14 13:15:53,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23172 conditions, 4323 events. 2657/4323 cut-off events. For 143209/143211 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25747 event pairs, 811 based on Foata normal form. 4/4326 useless extension candidates. Maximal degree in co-relation 23094. Up to 4094 conditions per place. [2024-06-14 13:15:53,284 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 166 selfloop transitions, 25 changer transitions 0/196 dead transitions. [2024-06-14 13:15:53,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 196 transitions, 2213 flow [2024-06-14 13:15:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:15:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:15:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-14 13:15:53,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053030303030303 [2024-06-14 13:15:53,286 INFO L175 Difference]: Start difference. First operand has 160 places, 175 transitions, 1652 flow. Second operand 6 states and 107 transitions. [2024-06-14 13:15:53,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 196 transitions, 2213 flow [2024-06-14 13:15:53,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 196 transitions, 1962 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 13:15:53,415 INFO L231 Difference]: Finished difference. Result has 158 places, 178 transitions, 1494 flow [2024-06-14 13:15:53,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1494, PETRI_PLACES=158, PETRI_TRANSITIONS=178} [2024-06-14 13:15:53,417 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-14 13:15:53,418 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 178 transitions, 1494 flow [2024-06-14 13:15:53,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:53,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:53,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:53,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:15:53,418 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:53,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:53,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2041493403, now seen corresponding path program 1 times [2024-06-14 13:15:53,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:53,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619397602] [2024-06-14 13:15:53,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:53,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:55,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:55,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619397602] [2024-06-14 13:15:55,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619397602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:55,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:55,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:55,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975274027] [2024-06-14 13:15:55,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:55,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:55,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:55,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:55,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 178 transitions, 1494 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:55,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:55,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:55,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:15:57,273 INFO L124 PetriNetUnfolderBase]: 2705/4374 cut-off events. [2024-06-14 13:15:57,273 INFO L125 PetriNetUnfolderBase]: For 151601/151601 co-relation queries the response was YES. [2024-06-14 13:15:57,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22866 conditions, 4374 events. 2705/4374 cut-off events. For 151601/151601 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25869 event pairs, 835 based on Foata normal form. 4/4369 useless extension candidates. Maximal degree in co-relation 22789. Up to 3734 conditions per place. [2024-06-14 13:15:57,309 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 166 selfloop transitions, 57 changer transitions 0/228 dead transitions. [2024-06-14 13:15:57,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 228 transitions, 2516 flow [2024-06-14 13:15:57,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:15:57,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:15:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:15:57,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-14 13:15:57,311 INFO L175 Difference]: Start difference. First operand has 158 places, 178 transitions, 1494 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:15:57,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 228 transitions, 2516 flow [2024-06-14 13:15:57,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 228 transitions, 2430 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:15:57,405 INFO L231 Difference]: Finished difference. Result has 163 places, 197 transitions, 1790 flow [2024-06-14 13:15:57,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1790, PETRI_PLACES=163, PETRI_TRANSITIONS=197} [2024-06-14 13:15:57,405 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-14 13:15:57,405 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 197 transitions, 1790 flow [2024-06-14 13:15:57,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:57,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:15:57,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:15:57,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:15:57,406 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:15:57,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:15:57,406 INFO L85 PathProgramCache]: Analyzing trace with hash 243552061, now seen corresponding path program 2 times [2024-06-14 13:15:57,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:15:57,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601365114] [2024-06-14 13:15:57,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:15:57,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:15:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:15:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:15:59,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:15:59,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601365114] [2024-06-14 13:15:59,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601365114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:15:59,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:15:59,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:15:59,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556569951] [2024-06-14 13:15:59,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:15:59,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:15:59,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:15:59,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:15:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:15:59,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:15:59,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 197 transitions, 1790 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:15:59,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:15:59,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:15:59,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:01,291 INFO L124 PetriNetUnfolderBase]: 2699/4374 cut-off events. [2024-06-14 13:16:01,292 INFO L125 PetriNetUnfolderBase]: For 155523/155523 co-relation queries the response was YES. [2024-06-14 13:16:01,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23796 conditions, 4374 events. 2699/4374 cut-off events. For 155523/155523 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25955 event pairs, 822 based on Foata normal form. 2/4374 useless extension candidates. Maximal degree in co-relation 23717. Up to 4156 conditions per place. [2024-06-14 13:16:01,327 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 184 selfloop transitions, 27 changer transitions 0/216 dead transitions. [2024-06-14 13:16:01,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 216 transitions, 2360 flow [2024-06-14 13:16:01,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:01,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:16:01,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-06-14 13:16:01,328 INFO L175 Difference]: Start difference. First operand has 163 places, 197 transitions, 1790 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:16:01,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 216 transitions, 2360 flow [2024-06-14 13:16:01,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 216 transitions, 2304 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-14 13:16:01,467 INFO L231 Difference]: Finished difference. Result has 169 places, 197 transitions, 1794 flow [2024-06-14 13:16:01,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1734, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1794, PETRI_PLACES=169, PETRI_TRANSITIONS=197} [2024-06-14 13:16:01,467 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-14 13:16:01,467 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 197 transitions, 1794 flow [2024-06-14 13:16:01,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:01,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:01,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:01,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:16:01,468 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:01,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1418390925, now seen corresponding path program 3 times [2024-06-14 13:16:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:01,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539732510] [2024-06-14 13:16:01,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:01,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:03,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:03,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539732510] [2024-06-14 13:16:03,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539732510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:03,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:03,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:16:03,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770263786] [2024-06-14 13:16:03,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:03,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:16:03,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:16:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:16:03,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:03,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 197 transitions, 1794 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:03,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:03,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:03,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:04,657 INFO L124 PetriNetUnfolderBase]: 2693/4367 cut-off events. [2024-06-14 13:16:04,657 INFO L125 PetriNetUnfolderBase]: For 158693/158693 co-relation queries the response was YES. [2024-06-14 13:16:04,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23505 conditions, 4367 events. 2693/4367 cut-off events. For 158693/158693 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25949 event pairs, 848 based on Foata normal form. 2/4368 useless extension candidates. Maximal degree in co-relation 23423. Up to 4201 conditions per place. [2024-06-14 13:16:04,696 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 191 selfloop transitions, 14 changer transitions 0/210 dead transitions. [2024-06-14 13:16:04,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 210 transitions, 2244 flow [2024-06-14 13:16:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:16:04,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-14 13:16:04,697 INFO L175 Difference]: Start difference. First operand has 169 places, 197 transitions, 1794 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:16:04,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 210 transitions, 2244 flow [2024-06-14 13:16:04,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 210 transitions, 2132 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-14 13:16:04,865 INFO L231 Difference]: Finished difference. Result has 167 places, 197 transitions, 1716 flow [2024-06-14 13:16:04,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1716, PETRI_PLACES=167, PETRI_TRANSITIONS=197} [2024-06-14 13:16:04,866 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-06-14 13:16:04,866 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 197 transitions, 1716 flow [2024-06-14 13:16:04,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:04,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:04,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:04,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:16:04,866 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)] === [2024-06-14 13:16:04,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:04,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1449901767, now seen corresponding path program 2 times [2024-06-14 13:16:04,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:04,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173949996] [2024-06-14 13:16:04,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:04,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:07,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:07,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173949996] [2024-06-14 13:16:07,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173949996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:07,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:07,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:07,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050892004] [2024-06-14 13:16:07,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:07,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:07,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:07,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:07,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:07,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:07,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 197 transitions, 1716 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:07,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:07,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:07,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:08,900 INFO L124 PetriNetUnfolderBase]: 2971/4736 cut-off events. [2024-06-14 13:16:08,900 INFO L125 PetriNetUnfolderBase]: For 201802/201802 co-relation queries the response was YES. [2024-06-14 13:16:08,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26764 conditions, 4736 events. 2971/4736 cut-off events. For 201802/201802 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27838 event pairs, 751 based on Foata normal form. 6/4734 useless extension candidates. Maximal degree in co-relation 26684. Up to 4171 conditions per place. [2024-06-14 13:16:08,942 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 185 selfloop transitions, 59 changer transitions 0/249 dead transitions. [2024-06-14 13:16:08,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 249 transitions, 2794 flow [2024-06-14 13:16:08,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:08,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:16:08,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-14 13:16:08,944 INFO L175 Difference]: Start difference. First operand has 167 places, 197 transitions, 1716 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:16:08,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 249 transitions, 2794 flow [2024-06-14 13:16:09,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 249 transitions, 2766 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:09,123 INFO L231 Difference]: Finished difference. Result has 172 places, 220 transitions, 2107 flow [2024-06-14 13:16:09,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2107, PETRI_PLACES=172, PETRI_TRANSITIONS=220} [2024-06-14 13:16:09,123 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 127 predicate places. [2024-06-14 13:16:09,123 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 220 transitions, 2107 flow [2024-06-14 13:16:09,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:09,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:09,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:09,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:16:09,124 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)] === [2024-06-14 13:16:09,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash 587222211, now seen corresponding path program 3 times [2024-06-14 13:16:09,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:09,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419246215] [2024-06-14 13:16:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:09,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:11,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:11,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419246215] [2024-06-14 13:16:11,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419246215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:11,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:11,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:11,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514577820] [2024-06-14 13:16:11,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:11,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:11,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:11,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:11,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:11,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:11,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 220 transitions, 2107 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:11,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:11,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:11,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:12,924 INFO L124 PetriNetUnfolderBase]: 2961/4712 cut-off events. [2024-06-14 13:16:12,924 INFO L125 PetriNetUnfolderBase]: For 206552/206552 co-relation queries the response was YES. [2024-06-14 13:16:12,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27894 conditions, 4712 events. 2961/4712 cut-off events. For 206552/206552 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 27647 event pairs, 738 based on Foata normal form. 6/4710 useless extension candidates. Maximal degree in co-relation 27811. Up to 4170 conditions per place. [2024-06-14 13:16:12,966 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 184 selfloop transitions, 62 changer transitions 0/251 dead transitions. [2024-06-14 13:16:12,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 251 transitions, 3021 flow [2024-06-14 13:16:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:16:12,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-14 13:16:12,967 INFO L175 Difference]: Start difference. First operand has 172 places, 220 transitions, 2107 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:16:12,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 251 transitions, 3021 flow [2024-06-14 13:16:13,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 251 transitions, 2854 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:13,235 INFO L231 Difference]: Finished difference. Result has 177 places, 229 transitions, 2261 flow [2024-06-14 13:16:13,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1956, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2261, PETRI_PLACES=177, PETRI_TRANSITIONS=229} [2024-06-14 13:16:13,235 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-06-14 13:16:13,235 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 229 transitions, 2261 flow [2024-06-14 13:16:13,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:13,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:13,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:13,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:16:13,236 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)] === [2024-06-14 13:16:13,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:13,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1449910695, now seen corresponding path program 1 times [2024-06-14 13:16:13,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:13,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081042734] [2024-06-14 13:16:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:13,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:16,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:16,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081042734] [2024-06-14 13:16:16,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081042734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:16,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:16,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:16:16,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397708834] [2024-06-14 13:16:16,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:16,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:16:16,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:16,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:16:16,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:16:16,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:16,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 229 transitions, 2261 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:16,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:16,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:16,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:17,925 INFO L124 PetriNetUnfolderBase]: 3000/4785 cut-off events. [2024-06-14 13:16:17,925 INFO L125 PetriNetUnfolderBase]: For 222381/222381 co-relation queries the response was YES. [2024-06-14 13:16:17,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28331 conditions, 4785 events. 3000/4785 cut-off events. For 222381/222381 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28148 event pairs, 770 based on Foata normal form. 14/4791 useless extension candidates. Maximal degree in co-relation 28245. Up to 4464 conditions per place. [2024-06-14 13:16:17,969 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 216 selfloop transitions, 33 changer transitions 0/254 dead transitions. [2024-06-14 13:16:17,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 254 transitions, 2903 flow [2024-06-14 13:16:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:16:17,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-14 13:16:17,971 INFO L175 Difference]: Start difference. First operand has 177 places, 229 transitions, 2261 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:16:17,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 254 transitions, 2903 flow [2024-06-14 13:16:18,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 254 transitions, 2802 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-14 13:16:18,240 INFO L231 Difference]: Finished difference. Result has 181 places, 231 transitions, 2265 flow [2024-06-14 13:16:18,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2265, PETRI_PLACES=181, PETRI_TRANSITIONS=231} [2024-06-14 13:16:18,240 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-14 13:16:18,240 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 231 transitions, 2265 flow [2024-06-14 13:16:18,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:18,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:18,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:18,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:16:18,240 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)] === [2024-06-14 13:16:18,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:18,241 INFO L85 PathProgramCache]: Analyzing trace with hash 446713728, now seen corresponding path program 1 times [2024-06-14 13:16:18,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:18,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248743859] [2024-06-14 13:16:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:18,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:20,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:20,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248743859] [2024-06-14 13:16:20,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248743859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:20,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:20,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:20,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795872157] [2024-06-14 13:16:20,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:20,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:20,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:20,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:20,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:20,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:20,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 231 transitions, 2265 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:20,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:20,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:20,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:22,430 INFO L124 PetriNetUnfolderBase]: 3061/4907 cut-off events. [2024-06-14 13:16:22,430 INFO L125 PetriNetUnfolderBase]: For 223839/223839 co-relation queries the response was YES. [2024-06-14 13:16:22,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29520 conditions, 4907 events. 3061/4907 cut-off events. For 223839/223839 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 29225 event pairs, 841 based on Foata normal form. 1/4906 useless extension candidates. Maximal degree in co-relation 29432. Up to 4093 conditions per place. [2024-06-14 13:16:22,469 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 193 selfloop transitions, 81 changer transitions 0/279 dead transitions. [2024-06-14 13:16:22,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 279 transitions, 3439 flow [2024-06-14 13:16:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 13:16:22,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 13:16:22,470 INFO L175 Difference]: Start difference. First operand has 181 places, 231 transitions, 2265 flow. Second operand 7 states and 140 transitions. [2024-06-14 13:16:22,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 279 transitions, 3439 flow [2024-06-14 13:16:22,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 279 transitions, 3354 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:16:22,740 INFO L231 Difference]: Finished difference. Result has 186 places, 247 transitions, 2704 flow [2024-06-14 13:16:22,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2184, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2704, PETRI_PLACES=186, PETRI_TRANSITIONS=247} [2024-06-14 13:16:22,741 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-14 13:16:22,741 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 247 transitions, 2704 flow [2024-06-14 13:16:22,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:22,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:22,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:22,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:16:22,741 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)] === [2024-06-14 13:16:22,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:22,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1324147706, now seen corresponding path program 2 times [2024-06-14 13:16:22,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:22,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161047929] [2024-06-14 13:16:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:22,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:25,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:25,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:25,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161047929] [2024-06-14 13:16:25,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161047929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:25,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:25,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:25,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551250309] [2024-06-14 13:16:25,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:25,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:25,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:25,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:25,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:25,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:25,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 247 transitions, 2704 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:25,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:25,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:25,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:26,835 INFO L124 PetriNetUnfolderBase]: 3103/4950 cut-off events. [2024-06-14 13:16:26,835 INFO L125 PetriNetUnfolderBase]: For 241494/241494 co-relation queries the response was YES. [2024-06-14 13:16:26,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31222 conditions, 4950 events. 3103/4950 cut-off events. For 241494/241494 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 29365 event pairs, 809 based on Foata normal form. 2/4951 useless extension candidates. Maximal degree in co-relation 31130. Up to 4640 conditions per place. [2024-06-14 13:16:26,881 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 237 selfloop transitions, 45 changer transitions 0/287 dead transitions. [2024-06-14 13:16:26,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 287 transitions, 3718 flow [2024-06-14 13:16:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:16:26,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-14 13:16:26,883 INFO L175 Difference]: Start difference. First operand has 186 places, 247 transitions, 2704 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:16:26,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 287 transitions, 3718 flow [2024-06-14 13:16:27,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 287 transitions, 3662 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-14 13:16:27,129 INFO L231 Difference]: Finished difference. Result has 194 places, 259 transitions, 2996 flow [2024-06-14 13:16:27,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2658, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2996, PETRI_PLACES=194, PETRI_TRANSITIONS=259} [2024-06-14 13:16:27,130 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-14 13:16:27,130 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 259 transitions, 2996 flow [2024-06-14 13:16:27,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:27,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:27,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:27,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:16:27,130 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:27,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:27,130 INFO L85 PathProgramCache]: Analyzing trace with hash 781427718, now seen corresponding path program 3 times [2024-06-14 13:16:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:27,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135659921] [2024-06-14 13:16:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:27,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:29,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:29,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135659921] [2024-06-14 13:16:29,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135659921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:29,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:29,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:29,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804058824] [2024-06-14 13:16:29,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:29,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:29,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:29,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:29,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 259 transitions, 2996 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:29,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:29,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:29,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:31,160 INFO L124 PetriNetUnfolderBase]: 3108/4969 cut-off events. [2024-06-14 13:16:31,160 INFO L125 PetriNetUnfolderBase]: For 249639/249639 co-relation queries the response was YES. [2024-06-14 13:16:31,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31698 conditions, 4969 events. 3108/4969 cut-off events. For 249639/249639 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29540 event pairs, 929 based on Foata normal form. 1/4961 useless extension candidates. Maximal degree in co-relation 31602. Up to 4135 conditions per place. [2024-06-14 13:16:31,212 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 199 selfloop transitions, 86 changer transitions 0/290 dead transitions. [2024-06-14 13:16:31,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 290 transitions, 4018 flow [2024-06-14 13:16:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:31,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 13:16:31,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 13:16:31,213 INFO L175 Difference]: Start difference. First operand has 194 places, 259 transitions, 2996 flow. Second operand 7 states and 133 transitions. [2024-06-14 13:16:31,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 290 transitions, 4018 flow [2024-06-14 13:16:31,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 290 transitions, 3876 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 13:16:31,675 INFO L231 Difference]: Finished difference. Result has 196 places, 262 transitions, 3091 flow [2024-06-14 13:16:31,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2854, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3091, PETRI_PLACES=196, PETRI_TRANSITIONS=262} [2024-06-14 13:16:31,675 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 151 predicate places. [2024-06-14 13:16:31,675 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 262 transitions, 3091 flow [2024-06-14 13:16:31,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:31,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:31,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:31,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:16:31,676 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:31,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:31,677 INFO L85 PathProgramCache]: Analyzing trace with hash -995366514, now seen corresponding path program 4 times [2024-06-14 13:16:31,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:31,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945520062] [2024-06-14 13:16:31,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:31,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:34,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:34,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945520062] [2024-06-14 13:16:34,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945520062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:34,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:34,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:34,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84028116] [2024-06-14 13:16:34,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:34,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:34,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:34,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:34,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:34,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 262 transitions, 3091 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:34,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:34,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:34,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:36,367 INFO L124 PetriNetUnfolderBase]: 3095/4939 cut-off events. [2024-06-14 13:16:36,367 INFO L125 PetriNetUnfolderBase]: For 259022/259022 co-relation queries the response was YES. [2024-06-14 13:16:36,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31854 conditions, 4939 events. 3095/4939 cut-off events. For 259022/259022 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29295 event pairs, 918 based on Foata normal form. 3/4933 useless extension candidates. Maximal degree in co-relation 31757. Up to 4128 conditions per place. [2024-06-14 13:16:36,412 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 197 selfloop transitions, 86 changer transitions 0/288 dead transitions. [2024-06-14 13:16:36,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 288 transitions, 3970 flow [2024-06-14 13:16:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:16:36,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-14 13:16:36,414 INFO L175 Difference]: Start difference. First operand has 196 places, 262 transitions, 3091 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:16:36,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 288 transitions, 3970 flow [2024-06-14 13:16:36,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 288 transitions, 3771 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 13:16:36,703 INFO L231 Difference]: Finished difference. Result has 201 places, 264 transitions, 3100 flow [2024-06-14 13:16:36,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2894, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3100, PETRI_PLACES=201, PETRI_TRANSITIONS=264} [2024-06-14 13:16:36,704 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-14 13:16:36,704 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 264 transitions, 3100 flow [2024-06-14 13:16:36,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:36,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:36,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:36,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:16:36,704 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:36,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:36,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1013772776, now seen corresponding path program 5 times [2024-06-14 13:16:36,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:36,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126775680] [2024-06-14 13:16:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:36,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:39,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:39,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126775680] [2024-06-14 13:16:39,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126775680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:39,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:39,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:39,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572694820] [2024-06-14 13:16:39,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:39,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:39,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:39,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:39,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:39,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:39,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 264 transitions, 3100 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:39,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:39,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:39,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:40,655 INFO L124 PetriNetUnfolderBase]: 3073/4898 cut-off events. [2024-06-14 13:16:40,655 INFO L125 PetriNetUnfolderBase]: For 262784/262784 co-relation queries the response was YES. [2024-06-14 13:16:40,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31319 conditions, 4898 events. 3073/4898 cut-off events. For 262784/262784 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 28925 event pairs, 757 based on Foata normal form. 6/4896 useless extension candidates. Maximal degree in co-relation 31221. Up to 4294 conditions per place. [2024-06-14 13:16:40,704 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 209 selfloop transitions, 76 changer transitions 0/290 dead transitions. [2024-06-14 13:16:40,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 290 transitions, 4004 flow [2024-06-14 13:16:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:16:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:16:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:16:40,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-14 13:16:40,706 INFO L175 Difference]: Start difference. First operand has 201 places, 264 transitions, 3100 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:16:40,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 290 transitions, 4004 flow [2024-06-14 13:16:40,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 290 transitions, 3782 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:16:40,988 INFO L231 Difference]: Finished difference. Result has 204 places, 264 transitions, 3048 flow [2024-06-14 13:16:40,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2884, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3048, PETRI_PLACES=204, PETRI_TRANSITIONS=264} [2024-06-14 13:16:40,990 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-14 13:16:40,990 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 264 transitions, 3048 flow [2024-06-14 13:16:40,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:40,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:40,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:40,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:16:40,990 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:40,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:40,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1989917702, now seen corresponding path program 6 times [2024-06-14 13:16:40,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:40,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094491076] [2024-06-14 13:16:40,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:40,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:43,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:43,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094491076] [2024-06-14 13:16:43,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094491076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:43,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:43,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:43,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809958550] [2024-06-14 13:16:43,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:43,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:43,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:43,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:43,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:43,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:43,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 264 transitions, 3048 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:43,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:43,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:43,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:44,895 INFO L124 PetriNetUnfolderBase]: 3060/4882 cut-off events. [2024-06-14 13:16:44,896 INFO L125 PetriNetUnfolderBase]: For 262370/262370 co-relation queries the response was YES. [2024-06-14 13:16:44,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30984 conditions, 4882 events. 3060/4882 cut-off events. For 262370/262370 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28846 event pairs, 785 based on Foata normal form. 3/4877 useless extension candidates. Maximal degree in co-relation 30885. Up to 4287 conditions per place. [2024-06-14 13:16:44,945 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 206 selfloop transitions, 74 changer transitions 0/285 dead transitions. [2024-06-14 13:16:44,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 285 transitions, 3806 flow [2024-06-14 13:16:44,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:16:44,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-14 13:16:44,946 INFO L175 Difference]: Start difference. First operand has 204 places, 264 transitions, 3048 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:16:44,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 285 transitions, 3806 flow [2024-06-14 13:16:45,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 285 transitions, 3548 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-14 13:16:45,289 INFO L231 Difference]: Finished difference. Result has 204 places, 264 transitions, 2947 flow [2024-06-14 13:16:45,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2947, PETRI_PLACES=204, PETRI_TRANSITIONS=264} [2024-06-14 13:16:45,290 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-14 13:16:45,290 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 264 transitions, 2947 flow [2024-06-14 13:16:45,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:45,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:45,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:45,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:16:45,290 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:45,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1790480845, now seen corresponding path program 1 times [2024-06-14 13:16:45,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:45,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174104461] [2024-06-14 13:16:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:45,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:47,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:47,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174104461] [2024-06-14 13:16:47,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174104461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:47,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:47,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:16:47,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893231751] [2024-06-14 13:16:47,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:47,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:16:47,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:16:47,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:16:47,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:47,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 264 transitions, 2947 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:47,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:47,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:47,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:49,488 INFO L124 PetriNetUnfolderBase]: 3156/5043 cut-off events. [2024-06-14 13:16:49,488 INFO L125 PetriNetUnfolderBase]: For 288868/288876 co-relation queries the response was YES. [2024-06-14 13:16:49,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32098 conditions, 5043 events. 3156/5043 cut-off events. For 288868/288876 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30138 event pairs, 870 based on Foata normal form. 16/5055 useless extension candidates. Maximal degree in co-relation 31999. Up to 4164 conditions per place. [2024-06-14 13:16:49,536 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 207 selfloop transitions, 87 changer transitions 0/299 dead transitions. [2024-06-14 13:16:49,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 299 transitions, 3987 flow [2024-06-14 13:16:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:16:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:16:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 13:16:49,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:16:49,537 INFO L175 Difference]: Start difference. First operand has 204 places, 264 transitions, 2947 flow. Second operand 7 states and 132 transitions. [2024-06-14 13:16:49,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 299 transitions, 3987 flow [2024-06-14 13:16:49,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 299 transitions, 3792 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:16:49,827 INFO L231 Difference]: Finished difference. Result has 204 places, 274 transitions, 3111 flow [2024-06-14 13:16:49,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3111, PETRI_PLACES=204, PETRI_TRANSITIONS=274} [2024-06-14 13:16:49,827 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-14 13:16:49,827 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 274 transitions, 3111 flow [2024-06-14 13:16:49,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:49,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:49,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:49,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:16:49,827 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:16:49,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:49,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1138210565, now seen corresponding path program 2 times [2024-06-14 13:16:49,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:49,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682396628] [2024-06-14 13:16:49,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:49,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:52,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:52,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:52,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682396628] [2024-06-14 13:16:52,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682396628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:52,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:52,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:16:52,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148306778] [2024-06-14 13:16:52,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:52,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:16:52,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:52,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:16:52,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:16:52,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:52,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 274 transitions, 3111 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:52,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:52,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:52,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:16:54,687 INFO L124 PetriNetUnfolderBase]: 3204/5109 cut-off events. [2024-06-14 13:16:54,687 INFO L125 PetriNetUnfolderBase]: For 299826/299826 co-relation queries the response was YES. [2024-06-14 13:16:54,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32984 conditions, 5109 events. 3204/5109 cut-off events. For 299826/299826 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30458 event pairs, 929 based on Foata normal form. 8/5108 useless extension candidates. Maximal degree in co-relation 32883. Up to 4196 conditions per place. [2024-06-14 13:16:54,754 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 205 selfloop transitions, 95 changer transitions 0/305 dead transitions. [2024-06-14 13:16:54,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 305 transitions, 4085 flow [2024-06-14 13:16:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:16:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:16:54,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:16:54,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 13:16:54,755 INFO L175 Difference]: Start difference. First operand has 204 places, 274 transitions, 3111 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:16:54,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 305 transitions, 4085 flow [2024-06-14 13:16:55,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 305 transitions, 3947 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-14 13:16:55,152 INFO L231 Difference]: Finished difference. Result has 210 places, 278 transitions, 3247 flow [2024-06-14 13:16:55,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3247, PETRI_PLACES=210, PETRI_TRANSITIONS=278} [2024-06-14 13:16:55,153 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-14 13:16:55,153 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 278 transitions, 3247 flow [2024-06-14 13:16:55,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:55,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:16:55,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:16:55,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:16:55,153 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)] === [2024-06-14 13:16:55,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:16:55,153 INFO L85 PathProgramCache]: Analyzing trace with hash -995351851, now seen corresponding path program 3 times [2024-06-14 13:16:55,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:16:55,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069654267] [2024-06-14 13:16:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:16:55,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:16:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:16:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:16:57,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:16:57,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069654267] [2024-06-14 13:16:57,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069654267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:16:57,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:16:57,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:16:57,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009476923] [2024-06-14 13:16:57,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:16:57,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:16:57,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:16:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:16:57,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:16:57,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:16:57,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 278 transitions, 3247 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:16:57,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:16:57,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:16:57,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:00,100 INFO L124 PetriNetUnfolderBase]: 3180/5061 cut-off events. [2024-06-14 13:17:00,100 INFO L125 PetriNetUnfolderBase]: For 301246/301246 co-relation queries the response was YES. [2024-06-14 13:17:00,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32347 conditions, 5061 events. 3180/5061 cut-off events. For 301246/301246 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30022 event pairs, 907 based on Foata normal form. 8/5060 useless extension candidates. Maximal degree in co-relation 32244. Up to 4184 conditions per place. [2024-06-14 13:17:00,145 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 204 selfloop transitions, 101 changer transitions 0/310 dead transitions. [2024-06-14 13:17:00,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 310 transitions, 4171 flow [2024-06-14 13:17:00,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:17:00,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:17:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:17:00,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:17:00,147 INFO L175 Difference]: Start difference. First operand has 210 places, 278 transitions, 3247 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:17:00,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 310 transitions, 4171 flow [2024-06-14 13:17:00,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 310 transitions, 3985 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:17:00,496 INFO L231 Difference]: Finished difference. Result has 215 places, 278 transitions, 3270 flow [2024-06-14 13:17:00,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3061, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3270, PETRI_PLACES=215, PETRI_TRANSITIONS=278} [2024-06-14 13:17:00,496 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-14 13:17:00,496 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 278 transitions, 3270 flow [2024-06-14 13:17:00,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:00,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:00,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:00,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:17:00,497 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)] === [2024-06-14 13:17:00,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:00,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1027805329, now seen corresponding path program 4 times [2024-06-14 13:17:00,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:00,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374211442] [2024-06-14 13:17:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:00,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:00,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:02,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:02,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374211442] [2024-06-14 13:17:02,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374211442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:02,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:02,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:02,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288767087] [2024-06-14 13:17:02,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:02,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:02,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:02,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:02,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:02,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:02,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 278 transitions, 3270 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:02,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:02,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:02,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:04,538 INFO L124 PetriNetUnfolderBase]: 3240/5146 cut-off events. [2024-06-14 13:17:04,538 INFO L125 PetriNetUnfolderBase]: For 316183/316183 co-relation queries the response was YES. [2024-06-14 13:17:04,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32876 conditions, 5146 events. 3240/5146 cut-off events. For 316183/316183 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30486 event pairs, 780 based on Foata normal form. 12/5150 useless extension candidates. Maximal degree in co-relation 32772. Up to 4497 conditions per place. [2024-06-14 13:17:04,591 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 213 selfloop transitions, 91 changer transitions 0/309 dead transitions. [2024-06-14 13:17:04,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 309 transitions, 4278 flow [2024-06-14 13:17:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:17:04,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-14 13:17:04,593 INFO L175 Difference]: Start difference. First operand has 215 places, 278 transitions, 3270 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:17:04,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 309 transitions, 4278 flow [2024-06-14 13:17:04,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 309 transitions, 4016 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-14 13:17:04,891 INFO L231 Difference]: Finished difference. Result has 215 places, 285 transitions, 3309 flow [2024-06-14 13:17:04,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3014, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3309, PETRI_PLACES=215, PETRI_TRANSITIONS=285} [2024-06-14 13:17:04,891 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-14 13:17:04,892 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 285 transitions, 3309 flow [2024-06-14 13:17:04,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:04,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:04,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:04,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:17:04,892 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)] === [2024-06-14 13:17:04,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1989926785, now seen corresponding path program 5 times [2024-06-14 13:17:04,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:04,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818226606] [2024-06-14 13:17:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:04,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:07,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:07,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818226606] [2024-06-14 13:17:07,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818226606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:07,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:07,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:07,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928349954] [2024-06-14 13:17:07,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:07,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:07,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:07,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:07,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:07,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:07,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 285 transitions, 3309 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:07,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:07,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:07,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:08,947 INFO L124 PetriNetUnfolderBase]: 3220/5102 cut-off events. [2024-06-14 13:17:08,947 INFO L125 PetriNetUnfolderBase]: For 305947/305947 co-relation queries the response was YES. [2024-06-14 13:17:08,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31864 conditions, 5102 events. 3220/5102 cut-off events. For 305947/305947 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30091 event pairs, 770 based on Foata normal form. 12/5106 useless extension candidates. Maximal degree in co-relation 31760. Up to 4493 conditions per place. [2024-06-14 13:17:08,993 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 218 selfloop transitions, 82 changer transitions 0/305 dead transitions. [2024-06-14 13:17:08,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 305 transitions, 4081 flow [2024-06-14 13:17:08,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:08,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:17:08,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-14 13:17:08,994 INFO L175 Difference]: Start difference. First operand has 215 places, 285 transitions, 3309 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:17:08,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 305 transitions, 4081 flow [2024-06-14 13:17:09,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 305 transitions, 3906 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:17:09,285 INFO L231 Difference]: Finished difference. Result has 217 places, 285 transitions, 3312 flow [2024-06-14 13:17:09,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3134, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3312, PETRI_PLACES=217, PETRI_TRANSITIONS=285} [2024-06-14 13:17:09,285 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-14 13:17:09,285 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 285 transitions, 3312 flow [2024-06-14 13:17:09,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:09,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:09,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:09,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:17:09,286 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)] === [2024-06-14 13:17:09,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:09,286 INFO L85 PathProgramCache]: Analyzing trace with hash 963105908, now seen corresponding path program 1 times [2024-06-14 13:17:09,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:09,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470626763] [2024-06-14 13:17:09,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:09,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:11,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:11,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470626763] [2024-06-14 13:17:11,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470626763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:11,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:11,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:11,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819154739] [2024-06-14 13:17:11,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:11,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:11,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:11,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:11,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:11,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:11,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 285 transitions, 3312 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:11,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:11,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:11,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:13,391 INFO L124 PetriNetUnfolderBase]: 3326/5305 cut-off events. [2024-06-14 13:17:13,391 INFO L125 PetriNetUnfolderBase]: For 321071/321075 co-relation queries the response was YES. [2024-06-14 13:17:13,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33665 conditions, 5305 events. 3326/5305 cut-off events. For 321071/321075 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 31785 event pairs, 887 based on Foata normal form. 6/5309 useless extension candidates. Maximal degree in co-relation 33560. Up to 4300 conditions per place. [2024-06-14 13:17:13,442 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 201 selfloop transitions, 122 changer transitions 0/328 dead transitions. [2024-06-14 13:17:13,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 328 transitions, 4453 flow [2024-06-14 13:17:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:17:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:17:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 13:17:13,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-14 13:17:13,444 INFO L175 Difference]: Start difference. First operand has 217 places, 285 transitions, 3312 flow. Second operand 7 states and 141 transitions. [2024-06-14 13:17:13,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 328 transitions, 4453 flow [2024-06-14 13:17:13,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 328 transitions, 4185 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 13:17:13,786 INFO L231 Difference]: Finished difference. Result has 215 places, 296 transitions, 3455 flow [2024-06-14 13:17:13,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3054, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3455, PETRI_PLACES=215, PETRI_TRANSITIONS=296} [2024-06-14 13:17:13,786 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-14 13:17:13,786 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 296 transitions, 3455 flow [2024-06-14 13:17:13,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:13,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:13,787 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] [2024-06-14 13:17:13,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:17:13,787 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)] === [2024-06-14 13:17:13,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:13,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1723964752, now seen corresponding path program 2 times [2024-06-14 13:17:13,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:13,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677413459] [2024-06-14 13:17:13,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:13,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:16,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:16,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677413459] [2024-06-14 13:17:16,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677413459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:16,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:16,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:16,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626089950] [2024-06-14 13:17:16,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:16,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:16,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:16,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:16,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:16,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:16,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 296 transitions, 3455 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:16,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:16,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:16,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:18,406 INFO L124 PetriNetUnfolderBase]: 3336/5318 cut-off events. [2024-06-14 13:17:18,406 INFO L125 PetriNetUnfolderBase]: For 331537/331537 co-relation queries the response was YES. [2024-06-14 13:17:18,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34006 conditions, 5318 events. 3336/5318 cut-off events. For 331537/331537 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31824 event pairs, 892 based on Foata normal form. 2/5318 useless extension candidates. Maximal degree in co-relation 33901. Up to 4306 conditions per place. [2024-06-14 13:17:18,454 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 203 selfloop transitions, 122 changer transitions 0/330 dead transitions. [2024-06-14 13:17:18,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 330 transitions, 4364 flow [2024-06-14 13:17:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:18,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:18,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:17:18,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 13:17:18,455 INFO L175 Difference]: Start difference. First operand has 215 places, 296 transitions, 3455 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:17:18,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 330 transitions, 4364 flow [2024-06-14 13:17:18,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 330 transitions, 4215 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 13:17:18,875 INFO L231 Difference]: Finished difference. Result has 220 places, 299 transitions, 3599 flow [2024-06-14 13:17:18,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3599, PETRI_PLACES=220, PETRI_TRANSITIONS=299} [2024-06-14 13:17:18,875 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-14 13:17:18,875 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 299 transitions, 3599 flow [2024-06-14 13:17:18,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:18,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:18,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:18,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:17:18,876 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)] === [2024-06-14 13:17:18,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:18,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1901096272, now seen corresponding path program 3 times [2024-06-14 13:17:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:18,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395580589] [2024-06-14 13:17:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:18,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:21,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:21,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395580589] [2024-06-14 13:17:21,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395580589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:21,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:21,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:21,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861655078] [2024-06-14 13:17:21,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:21,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:21,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:21,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:21,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:21,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:21,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 299 transitions, 3599 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:21,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:21,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:21,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:22,822 INFO L124 PetriNetUnfolderBase]: 3324/5281 cut-off events. [2024-06-14 13:17:22,822 INFO L125 PetriNetUnfolderBase]: For 339094/339094 co-relation queries the response was YES. [2024-06-14 13:17:22,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33947 conditions, 5281 events. 3324/5281 cut-off events. For 339094/339094 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 31451 event pairs, 839 based on Foata normal form. 4/5284 useless extension candidates. Maximal degree in co-relation 33841. Up to 4961 conditions per place. [2024-06-14 13:17:22,870 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 273 selfloop transitions, 45 changer transitions 0/323 dead transitions. [2024-06-14 13:17:22,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 323 transitions, 4322 flow [2024-06-14 13:17:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:17:22,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034090909090909 [2024-06-14 13:17:22,872 INFO L175 Difference]: Start difference. First operand has 220 places, 299 transitions, 3599 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:17:22,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 323 transitions, 4322 flow [2024-06-14 13:17:23,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 323 transitions, 4056 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:17:23,256 INFO L231 Difference]: Finished difference. Result has 222 places, 299 transitions, 3435 flow [2024-06-14 13:17:23,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3435, PETRI_PLACES=222, PETRI_TRANSITIONS=299} [2024-06-14 13:17:23,257 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 177 predicate places. [2024-06-14 13:17:23,257 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 299 transitions, 3435 flow [2024-06-14 13:17:23,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:23,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:23,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:23,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:17:23,257 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)] === [2024-06-14 13:17:23,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:23,258 INFO L85 PathProgramCache]: Analyzing trace with hash -907028634, now seen corresponding path program 4 times [2024-06-14 13:17:23,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:23,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627765927] [2024-06-14 13:17:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:23,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:25,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:25,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627765927] [2024-06-14 13:17:25,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627765927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:25,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:25,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:25,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724567326] [2024-06-14 13:17:25,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:25,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:25,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:25,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:25,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:25,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 299 transitions, 3435 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:25,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:25,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:25,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:27,478 INFO L124 PetriNetUnfolderBase]: 3334/5315 cut-off events. [2024-06-14 13:17:27,478 INFO L125 PetriNetUnfolderBase]: For 343243/343251 co-relation queries the response was YES. [2024-06-14 13:17:27,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33614 conditions, 5315 events. 3334/5315 cut-off events. For 343243/343251 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31875 event pairs, 870 based on Foata normal form. 10/5321 useless extension candidates. Maximal degree in co-relation 33507. Up to 4301 conditions per place. [2024-06-14 13:17:27,524 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 214 selfloop transitions, 111 changer transitions 0/330 dead transitions. [2024-06-14 13:17:27,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 330 transitions, 4461 flow [2024-06-14 13:17:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:17:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:17:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 13:17:27,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-14 13:17:27,526 INFO L175 Difference]: Start difference. First operand has 222 places, 299 transitions, 3435 flow. Second operand 7 states and 134 transitions. [2024-06-14 13:17:27,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 330 transitions, 4461 flow [2024-06-14 13:17:27,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 330 transitions, 4371 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:17:27,906 INFO L231 Difference]: Finished difference. Result has 222 places, 302 transitions, 3614 flow [2024-06-14 13:17:27,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3345, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3614, PETRI_PLACES=222, PETRI_TRANSITIONS=302} [2024-06-14 13:17:27,906 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 177 predicate places. [2024-06-14 13:17:27,906 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 302 transitions, 3614 flow [2024-06-14 13:17:27,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:27,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:27,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:27,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:17:27,907 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)] === [2024-06-14 13:17:27,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:27,907 INFO L85 PathProgramCache]: Analyzing trace with hash 840759018, now seen corresponding path program 5 times [2024-06-14 13:17:27,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:27,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9166655] [2024-06-14 13:17:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:27,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:30,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:30,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9166655] [2024-06-14 13:17:30,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9166655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:30,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:30,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:30,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518586381] [2024-06-14 13:17:30,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:30,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:30,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:30,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:30,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:30,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:30,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 302 transitions, 3614 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:30,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:30,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:30,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:32,218 INFO L124 PetriNetUnfolderBase]: 3308/5273 cut-off events. [2024-06-14 13:17:32,218 INFO L125 PetriNetUnfolderBase]: For 352220/352228 co-relation queries the response was YES. [2024-06-14 13:17:32,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33734 conditions, 5273 events. 3308/5273 cut-off events. For 352220/352228 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 31640 event pairs, 884 based on Foata normal form. 14/5283 useless extension candidates. Maximal degree in co-relation 33626. Up to 4282 conditions per place. [2024-06-14 13:17:32,265 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 216 selfloop transitions, 105 changer transitions 0/326 dead transitions. [2024-06-14 13:17:32,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 326 transitions, 4454 flow [2024-06-14 13:17:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:17:32,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:17:32,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 13:17:32,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-14 13:17:32,267 INFO L175 Difference]: Start difference. First operand has 222 places, 302 transitions, 3614 flow. Second operand 7 states and 131 transitions. [2024-06-14 13:17:32,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 326 transitions, 4454 flow [2024-06-14 13:17:32,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 326 transitions, 4314 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 13:17:32,725 INFO L231 Difference]: Finished difference. Result has 226 places, 302 transitions, 3692 flow [2024-06-14 13:17:32,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3692, PETRI_PLACES=226, PETRI_TRANSITIONS=302} [2024-06-14 13:17:32,726 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-14 13:17:32,726 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 302 transitions, 3692 flow [2024-06-14 13:17:32,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:32,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:32,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:32,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:17:32,726 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)] === [2024-06-14 13:17:32,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:32,726 INFO L85 PathProgramCache]: Analyzing trace with hash -566505460, now seen corresponding path program 6 times [2024-06-14 13:17:32,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:32,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739763963] [2024-06-14 13:17:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:32,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:35,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:35,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739763963] [2024-06-14 13:17:35,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739763963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:35,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:35,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:35,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036285676] [2024-06-14 13:17:35,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:35,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:35,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:35,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:35,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:35,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:35,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 302 transitions, 3692 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:35,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:35,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:35,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:37,465 INFO L124 PetriNetUnfolderBase]: 3318/5285 cut-off events. [2024-06-14 13:17:37,466 INFO L125 PetriNetUnfolderBase]: For 356547/356547 co-relation queries the response was YES. [2024-06-14 13:17:37,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34060 conditions, 5285 events. 3318/5285 cut-off events. For 356547/356547 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31636 event pairs, 1006 based on Foata normal form. 2/5278 useless extension candidates. Maximal degree in co-relation 33951. Up to 4288 conditions per place. [2024-06-14 13:17:37,520 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 211 selfloop transitions, 116 changer transitions 0/332 dead transitions. [2024-06-14 13:17:37,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 332 transitions, 4604 flow [2024-06-14 13:17:37,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:37,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:17:37,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:17:37,525 INFO L175 Difference]: Start difference. First operand has 226 places, 302 transitions, 3692 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:17:37,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 332 transitions, 4604 flow [2024-06-14 13:17:37,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 332 transitions, 4442 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:17:37,954 INFO L231 Difference]: Finished difference. Result has 229 places, 305 transitions, 3816 flow [2024-06-14 13:17:37,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3816, PETRI_PLACES=229, PETRI_TRANSITIONS=305} [2024-06-14 13:17:37,954 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-14 13:17:37,954 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 305 transitions, 3816 flow [2024-06-14 13:17:37,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:37,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:37,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:37,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:17:37,955 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)] === [2024-06-14 13:17:37,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:37,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1755525914, now seen corresponding path program 7 times [2024-06-14 13:17:37,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:37,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437977693] [2024-06-14 13:17:37,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:37,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:40,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:40,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437977693] [2024-06-14 13:17:40,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437977693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:40,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:40,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:40,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056242930] [2024-06-14 13:17:40,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:40,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:40,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:40,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:40,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:40,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:40,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 305 transitions, 3816 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:40,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:40,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:40,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:42,944 INFO L124 PetriNetUnfolderBase]: 3300/5261 cut-off events. [2024-06-14 13:17:42,944 INFO L125 PetriNetUnfolderBase]: For 363971/363971 co-relation queries the response was YES. [2024-06-14 13:17:42,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33793 conditions, 5261 events. 3300/5261 cut-off events. For 363971/363971 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 31497 event pairs, 948 based on Foata normal form. 6/5258 useless extension candidates. Maximal degree in co-relation 33683. Up to 4277 conditions per place. [2024-06-14 13:17:42,996 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 215 selfloop transitions, 117 changer transitions 0/337 dead transitions. [2024-06-14 13:17:42,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 337 transitions, 4830 flow [2024-06-14 13:17:42,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:17:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:17:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:17:42,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:17:42,998 INFO L175 Difference]: Start difference. First operand has 229 places, 305 transitions, 3816 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:17:42,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 337 transitions, 4830 flow [2024-06-14 13:17:43,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 337 transitions, 4676 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:17:43,436 INFO L231 Difference]: Finished difference. Result has 234 places, 305 transitions, 3903 flow [2024-06-14 13:17:43,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3903, PETRI_PLACES=234, PETRI_TRANSITIONS=305} [2024-06-14 13:17:43,436 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-14 13:17:43,437 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 305 transitions, 3903 flow [2024-06-14 13:17:43,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:43,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:43,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:43,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:17:43,437 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)] === [2024-06-14 13:17:43,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash -791321754, now seen corresponding path program 8 times [2024-06-14 13:17:43,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:43,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307853758] [2024-06-14 13:17:43,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:43,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:46,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:46,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307853758] [2024-06-14 13:17:46,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307853758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:46,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:46,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:17:46,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089127314] [2024-06-14 13:17:46,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:46,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:17:46,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:46,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:17:46,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:17:46,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:46,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 305 transitions, 3903 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:46,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:46,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:46,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:48,306 INFO L124 PetriNetUnfolderBase]: 3274/5225 cut-off events. [2024-06-14 13:17:48,306 INFO L125 PetriNetUnfolderBase]: For 363519/363519 co-relation queries the response was YES. [2024-06-14 13:17:48,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33439 conditions, 5225 events. 3274/5225 cut-off events. For 363519/363519 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31269 event pairs, 948 based on Foata normal form. 6/5222 useless extension candidates. Maximal degree in co-relation 33327. Up to 4258 conditions per place. [2024-06-14 13:17:48,361 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 213 selfloop transitions, 113 changer transitions 0/331 dead transitions. [2024-06-14 13:17:48,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 331 transitions, 4763 flow [2024-06-14 13:17:48,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:17:48,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 13:17:48,362 INFO L175 Difference]: Start difference. First operand has 234 places, 305 transitions, 3903 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:17:48,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 331 transitions, 4763 flow [2024-06-14 13:17:48,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 331 transitions, 4481 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:17:48,856 INFO L231 Difference]: Finished difference. Result has 234 places, 305 transitions, 3856 flow [2024-06-14 13:17:48,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3621, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3856, PETRI_PLACES=234, PETRI_TRANSITIONS=305} [2024-06-14 13:17:48,856 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-14 13:17:48,856 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 305 transitions, 3856 flow [2024-06-14 13:17:48,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:48,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:48,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:48,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:17:48,857 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)] === [2024-06-14 13:17:48,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:48,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1489297640, now seen corresponding path program 9 times [2024-06-14 13:17:48,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:48,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560901615] [2024-06-14 13:17:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:48,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:51,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:51,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560901615] [2024-06-14 13:17:51,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560901615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:51,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:51,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:51,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742193021] [2024-06-14 13:17:51,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:51,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:51,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:51,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:51,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:51,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:51,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 305 transitions, 3856 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:51,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:51,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:51,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:53,070 INFO L124 PetriNetUnfolderBase]: 3230/5146 cut-off events. [2024-06-14 13:17:53,070 INFO L125 PetriNetUnfolderBase]: For 356729/356729 co-relation queries the response was YES. [2024-06-14 13:17:53,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32326 conditions, 5146 events. 3230/5146 cut-off events. For 356729/356729 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 30746 event pairs, 770 based on Foata normal form. 12/5150 useless extension candidates. Maximal degree in co-relation 32213. Up to 4516 conditions per place. [2024-06-14 13:17:53,127 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 236 selfloop transitions, 88 changer transitions 0/329 dead transitions. [2024-06-14 13:17:53,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 329 transitions, 4718 flow [2024-06-14 13:17:53,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:17:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:17:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:17:53,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-14 13:17:53,128 INFO L175 Difference]: Start difference. First operand has 234 places, 305 transitions, 3856 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:17:53,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 329 transitions, 4718 flow [2024-06-14 13:17:53,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 329 transitions, 4419 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:17:53,638 INFO L231 Difference]: Finished difference. Result has 235 places, 305 transitions, 3749 flow [2024-06-14 13:17:53,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3560, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3749, PETRI_PLACES=235, PETRI_TRANSITIONS=305} [2024-06-14 13:17:53,639 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 190 predicate places. [2024-06-14 13:17:53,639 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 305 transitions, 3749 flow [2024-06-14 13:17:53,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:53,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:53,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:53,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:17:53,640 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)] === [2024-06-14 13:17:53,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:53,640 INFO L85 PathProgramCache]: Analyzing trace with hash 939326286, now seen corresponding path program 10 times [2024-06-14 13:17:53,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:53,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709643062] [2024-06-14 13:17:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:53,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:17:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:17:56,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:17:56,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709643062] [2024-06-14 13:17:56,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709643062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:17:56,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:17:56,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:17:56,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993992083] [2024-06-14 13:17:56,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:17:56,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:17:56,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:17:56,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:17:56,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:17:56,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:17:56,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 305 transitions, 3749 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:56,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:17:56,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:17:56,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:17:57,479 INFO L124 PetriNetUnfolderBase]: 3204/5110 cut-off events. [2024-06-14 13:17:57,479 INFO L125 PetriNetUnfolderBase]: For 331757/331757 co-relation queries the response was YES. [2024-06-14 13:17:57,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31519 conditions, 5110 events. 3204/5110 cut-off events. For 331757/331757 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 30455 event pairs, 772 based on Foata normal form. 6/5108 useless extension candidates. Maximal degree in co-relation 31406. Up to 4497 conditions per place. [2024-06-14 13:17:57,532 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 236 selfloop transitions, 83 changer transitions 0/324 dead transitions. [2024-06-14 13:17:57,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 324 transitions, 4439 flow [2024-06-14 13:17:57,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:17:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:17:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:17:57,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-14 13:17:57,533 INFO L175 Difference]: Start difference. First operand has 235 places, 305 transitions, 3749 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:17:57,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 324 transitions, 4439 flow [2024-06-14 13:17:57,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 324 transitions, 4286 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:17:57,895 INFO L231 Difference]: Finished difference. Result has 237 places, 305 transitions, 3771 flow [2024-06-14 13:17:57,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3596, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3771, PETRI_PLACES=237, PETRI_TRANSITIONS=305} [2024-06-14 13:17:57,896 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-14 13:17:57,896 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 305 transitions, 3771 flow [2024-06-14 13:17:57,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:17:57,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:17:57,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:17:57,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:17:57,896 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)] === [2024-06-14 13:17:57,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:17:57,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1915866402, now seen corresponding path program 1 times [2024-06-14 13:17:57,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:17:57,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789674007] [2024-06-14 13:17:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:17:57,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:17:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:01,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:01,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789674007] [2024-06-14 13:18:01,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789674007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:01,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:01,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:01,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062020447] [2024-06-14 13:18:01,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:01,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:01,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:01,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:01,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:01,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:01,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 305 transitions, 3771 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:01,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:01,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:01,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:02,913 INFO L124 PetriNetUnfolderBase]: 3256/5198 cut-off events. [2024-06-14 13:18:02,913 INFO L125 PetriNetUnfolderBase]: For 360829/360829 co-relation queries the response was YES. [2024-06-14 13:18:02,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32071 conditions, 5198 events. 3256/5198 cut-off events. For 360829/360829 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 31217 event pairs, 784 based on Foata normal form. 14/5204 useless extension candidates. Maximal degree in co-relation 31957. Up to 4837 conditions per place. [2024-06-14 13:18:02,963 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 290 selfloop transitions, 33 changer transitions 0/328 dead transitions. [2024-06-14 13:18:02,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 328 transitions, 4536 flow [2024-06-14 13:18:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:18:02,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-14 13:18:02,964 INFO L175 Difference]: Start difference. First operand has 237 places, 305 transitions, 3771 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:18:02,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 328 transitions, 4536 flow [2024-06-14 13:18:03,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 328 transitions, 4201 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 13:18:03,297 INFO L231 Difference]: Finished difference. Result has 233 places, 307 transitions, 3541 flow [2024-06-14 13:18:03,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3541, PETRI_PLACES=233, PETRI_TRANSITIONS=307} [2024-06-14 13:18:03,297 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 188 predicate places. [2024-06-14 13:18:03,298 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 307 transitions, 3541 flow [2024-06-14 13:18:03,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:03,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:03,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:03,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:18:03,298 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)] === [2024-06-14 13:18:03,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:03,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1794835430, now seen corresponding path program 2 times [2024-06-14 13:18:03,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:03,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114104838] [2024-06-14 13:18:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:03,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:06,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:06,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114104838] [2024-06-14 13:18:06,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114104838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:06,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:06,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:06,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720386762] [2024-06-14 13:18:06,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:06,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:06,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:06,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:06,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:06,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:06,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 307 transitions, 3541 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:06,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:06,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:06,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:08,258 INFO L124 PetriNetUnfolderBase]: 3317/5293 cut-off events. [2024-06-14 13:18:08,258 INFO L125 PetriNetUnfolderBase]: For 366067/366067 co-relation queries the response was YES. [2024-06-14 13:18:08,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32718 conditions, 5293 events. 3317/5293 cut-off events. For 366067/366067 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31825 event pairs, 801 based on Foata normal form. 8/5293 useless extension candidates. Maximal degree in co-relation 32603. Up to 4777 conditions per place. [2024-06-14 13:18:08,317 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 297 selfloop transitions, 32 changer transitions 0/334 dead transitions. [2024-06-14 13:18:08,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 334 transitions, 4489 flow [2024-06-14 13:18:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:18:08,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-14 13:18:08,318 INFO L175 Difference]: Start difference. First operand has 233 places, 307 transitions, 3541 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:18:08,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 334 transitions, 4489 flow [2024-06-14 13:18:08,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 334 transitions, 4408 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:08,835 INFO L231 Difference]: Finished difference. Result has 235 places, 309 transitions, 3562 flow [2024-06-14 13:18:08,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3562, PETRI_PLACES=235, PETRI_TRANSITIONS=309} [2024-06-14 13:18:08,835 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 190 predicate places. [2024-06-14 13:18:08,835 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 309 transitions, 3562 flow [2024-06-14 13:18:08,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:08,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:08,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:08,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:18:08,836 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)] === [2024-06-14 13:18:08,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:08,836 INFO L85 PathProgramCache]: Analyzing trace with hash -909459964, now seen corresponding path program 1 times [2024-06-14 13:18:08,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:08,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533508785] [2024-06-14 13:18:08,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:08,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:11,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:11,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533508785] [2024-06-14 13:18:11,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533508785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:11,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:11,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:11,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896861768] [2024-06-14 13:18:11,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:11,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:11,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:11,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:11,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:11,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 309 transitions, 3562 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:11,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:11,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:11,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:13,703 INFO L124 PetriNetUnfolderBase]: 3325/5343 cut-off events. [2024-06-14 13:18:13,704 INFO L125 PetriNetUnfolderBase]: For 361484/361486 co-relation queries the response was YES. [2024-06-14 13:18:13,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32956 conditions, 5343 events. 3325/5343 cut-off events. For 361484/361486 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 32430 event pairs, 1072 based on Foata normal form. 4/5346 useless extension candidates. Maximal degree in co-relation 32840. Up to 5020 conditions per place. [2024-06-14 13:18:13,751 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 301 selfloop transitions, 30 changer transitions 0/336 dead transitions. [2024-06-14 13:18:13,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 336 transitions, 4512 flow [2024-06-14 13:18:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:18:13,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-14 13:18:13,752 INFO L175 Difference]: Start difference. First operand has 235 places, 309 transitions, 3562 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:18:13,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 336 transitions, 4512 flow [2024-06-14 13:18:14,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 336 transitions, 4469 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:18:14,213 INFO L231 Difference]: Finished difference. Result has 239 places, 313 transitions, 3660 flow [2024-06-14 13:18:14,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3519, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3660, PETRI_PLACES=239, PETRI_TRANSITIONS=313} [2024-06-14 13:18:14,213 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 194 predicate places. [2024-06-14 13:18:14,213 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 313 transitions, 3660 flow [2024-06-14 13:18:14,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:14,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:14,214 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] [2024-06-14 13:18:14,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:18:14,214 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)] === [2024-06-14 13:18:14,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:14,214 INFO L85 PathProgramCache]: Analyzing trace with hash 837972428, now seen corresponding path program 2 times [2024-06-14 13:18:14,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:14,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522954529] [2024-06-14 13:18:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:14,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:17,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:17,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522954529] [2024-06-14 13:18:17,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522954529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:17,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:17,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:17,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118928542] [2024-06-14 13:18:17,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:17,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:17,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:17,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:17,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:17,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:17,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 313 transitions, 3660 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:17,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:17,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:17,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:19,030 INFO L124 PetriNetUnfolderBase]: 3333/5343 cut-off events. [2024-06-14 13:18:19,030 INFO L125 PetriNetUnfolderBase]: For 371416/371418 co-relation queries the response was YES. [2024-06-14 13:18:19,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33314 conditions, 5343 events. 3333/5343 cut-off events. For 371416/371418 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32395 event pairs, 1108 based on Foata normal form. 4/5346 useless extension candidates. Maximal degree in co-relation 33196. Up to 5069 conditions per place. [2024-06-14 13:18:19,086 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 301 selfloop transitions, 27 changer transitions 0/333 dead transitions. [2024-06-14 13:18:19,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 333 transitions, 4410 flow [2024-06-14 13:18:19,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:18:19,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:18:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:18:19,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-14 13:18:19,088 INFO L175 Difference]: Start difference. First operand has 239 places, 313 transitions, 3660 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:18:19,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 333 transitions, 4410 flow [2024-06-14 13:18:19,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 333 transitions, 4318 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 13:18:19,595 INFO L231 Difference]: Finished difference. Result has 243 places, 315 transitions, 3671 flow [2024-06-14 13:18:19,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3584, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3671, PETRI_PLACES=243, PETRI_TRANSITIONS=315} [2024-06-14 13:18:19,596 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-14 13:18:19,596 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 315 transitions, 3671 flow [2024-06-14 13:18:19,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:19,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:19,596 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] [2024-06-14 13:18:19,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:18:19,596 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)] === [2024-06-14 13:18:19,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:19,596 INFO L85 PathProgramCache]: Analyzing trace with hash 924786602, now seen corresponding path program 3 times [2024-06-14 13:18:19,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:19,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329767636] [2024-06-14 13:18:19,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:19,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:23,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:23,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329767636] [2024-06-14 13:18:23,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329767636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:23,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:23,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:23,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037868097] [2024-06-14 13:18:23,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:23,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:23,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:23,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:23,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:23,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:23,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 315 transitions, 3671 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:23,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:23,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:23,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:24,887 INFO L124 PetriNetUnfolderBase]: 3341/5353 cut-off events. [2024-06-14 13:18:24,887 INFO L125 PetriNetUnfolderBase]: For 380846/380846 co-relation queries the response was YES. [2024-06-14 13:18:24,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33477 conditions, 5353 events. 3341/5353 cut-off events. For 380846/380846 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 32417 event pairs, 1123 based on Foata normal form. 2/5353 useless extension candidates. Maximal degree in co-relation 33357. Up to 5081 conditions per place. [2024-06-14 13:18:24,947 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 302 selfloop transitions, 29 changer transitions 0/336 dead transitions. [2024-06-14 13:18:24,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 336 transitions, 4417 flow [2024-06-14 13:18:24,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:18:24,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3693181818181818 [2024-06-14 13:18:24,948 INFO L175 Difference]: Start difference. First operand has 243 places, 315 transitions, 3671 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:18:24,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 336 transitions, 4417 flow [2024-06-14 13:18:25,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 336 transitions, 4350 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:18:25,660 INFO L231 Difference]: Finished difference. Result has 246 places, 317 transitions, 3699 flow [2024-06-14 13:18:25,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3604, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3699, PETRI_PLACES=246, PETRI_TRANSITIONS=317} [2024-06-14 13:18:25,661 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-14 13:18:25,661 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 317 transitions, 3699 flow [2024-06-14 13:18:25,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:25,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:25,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:25,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:18:25,661 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)] === [2024-06-14 13:18:25,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:25,661 INFO L85 PathProgramCache]: Analyzing trace with hash -791127136, now seen corresponding path program 1 times [2024-06-14 13:18:25,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:25,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282892852] [2024-06-14 13:18:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:25,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:29,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:29,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282892852] [2024-06-14 13:18:29,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282892852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:29,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:29,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:29,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928395569] [2024-06-14 13:18:29,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:29,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:29,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:29,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:29,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:29,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 317 transitions, 3699 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:29,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:29,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:29,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:31,485 INFO L124 PetriNetUnfolderBase]: 3357/5368 cut-off events. [2024-06-14 13:18:31,485 INFO L125 PetriNetUnfolderBase]: For 397105/397105 co-relation queries the response was YES. [2024-06-14 13:18:31,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33808 conditions, 5368 events. 3357/5368 cut-off events. For 397105/397105 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32474 event pairs, 1008 based on Foata normal form. 4/5363 useless extension candidates. Maximal degree in co-relation 33687. Up to 4415 conditions per place. [2024-06-14 13:18:31,542 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 221 selfloop transitions, 117 changer transitions 0/343 dead transitions. [2024-06-14 13:18:31,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 343 transitions, 4505 flow [2024-06-14 13:18:31,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:31,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:18:31,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-14 13:18:31,544 INFO L175 Difference]: Start difference. First operand has 246 places, 317 transitions, 3699 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:18:31,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 343 transitions, 4505 flow [2024-06-14 13:18:32,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 343 transitions, 4430 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:18:32,227 INFO L231 Difference]: Finished difference. Result has 248 places, 320 transitions, 3932 flow [2024-06-14 13:18:32,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3932, PETRI_PLACES=248, PETRI_TRANSITIONS=320} [2024-06-14 13:18:32,227 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-14 13:18:32,227 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 320 transitions, 3932 flow [2024-06-14 13:18:32,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:32,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:32,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:32,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:18:32,228 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)] === [2024-06-14 13:18:32,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:32,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1569117452, now seen corresponding path program 4 times [2024-06-14 13:18:32,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:32,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67578327] [2024-06-14 13:18:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:32,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:35,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:35,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67578327] [2024-06-14 13:18:35,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67578327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:35,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:35,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:35,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838856839] [2024-06-14 13:18:35,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:35,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:35,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:35,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:35,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:35,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:35,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 320 transitions, 3932 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:35,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:35,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:35,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:36,863 INFO L124 PetriNetUnfolderBase]: 3352/5359 cut-off events. [2024-06-14 13:18:36,863 INFO L125 PetriNetUnfolderBase]: For 399042/399042 co-relation queries the response was YES. [2024-06-14 13:18:36,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34389 conditions, 5359 events. 3352/5359 cut-off events. For 399042/399042 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32450 event pairs, 1163 based on Foata normal form. 2/5360 useless extension candidates. Maximal degree in co-relation 34267. Up to 5148 conditions per place. [2024-06-14 13:18:36,927 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 313 selfloop transitions, 16 changer transitions 0/334 dead transitions. [2024-06-14 13:18:36,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 334 transitions, 4628 flow [2024-06-14 13:18:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:18:36,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:18:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 13:18:36,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3465909090909091 [2024-06-14 13:18:36,928 INFO L175 Difference]: Start difference. First operand has 248 places, 320 transitions, 3932 flow. Second operand 8 states and 122 transitions. [2024-06-14 13:18:36,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 334 transitions, 4628 flow [2024-06-14 13:18:37,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 334 transitions, 4328 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 13:18:37,705 INFO L231 Difference]: Finished difference. Result has 250 places, 320 transitions, 3669 flow [2024-06-14 13:18:37,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3632, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3669, PETRI_PLACES=250, PETRI_TRANSITIONS=320} [2024-06-14 13:18:37,705 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-14 13:18:37,705 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 320 transitions, 3669 flow [2024-06-14 13:18:37,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:37,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:37,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:37,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:18:37,706 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)] === [2024-06-14 13:18:37,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:37,706 INFO L85 PathProgramCache]: Analyzing trace with hash -625488002, now seen corresponding path program 2 times [2024-06-14 13:18:37,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:37,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442618840] [2024-06-14 13:18:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:37,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:41,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:41,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442618840] [2024-06-14 13:18:41,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442618840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:41,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:41,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:41,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006275934] [2024-06-14 13:18:41,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:41,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:41,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:41,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:41,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:41,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:41,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 320 transitions, 3669 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:41,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:41,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:41,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:42,836 INFO L124 PetriNetUnfolderBase]: 3404/5420 cut-off events. [2024-06-14 13:18:42,836 INFO L125 PetriNetUnfolderBase]: For 442983/442983 co-relation queries the response was YES. [2024-06-14 13:18:42,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34416 conditions, 5420 events. 3404/5420 cut-off events. For 442983/442983 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32566 event pairs, 810 based on Foata normal form. 14/5426 useless extension candidates. Maximal degree in co-relation 34293. Up to 4751 conditions per place. [2024-06-14 13:18:42,890 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 253 selfloop transitions, 89 changer transitions 0/347 dead transitions. [2024-06-14 13:18:42,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 347 transitions, 4497 flow [2024-06-14 13:18:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:18:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:18:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:18:42,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-14 13:18:42,892 INFO L175 Difference]: Start difference. First operand has 250 places, 320 transitions, 3669 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:18:42,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 347 transitions, 4497 flow [2024-06-14 13:18:43,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 347 transitions, 4446 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:18:43,488 INFO L231 Difference]: Finished difference. Result has 252 places, 323 transitions, 3878 flow [2024-06-14 13:18:43,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3618, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3878, PETRI_PLACES=252, PETRI_TRANSITIONS=323} [2024-06-14 13:18:43,489 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 207 predicate places. [2024-06-14 13:18:43,489 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 323 transitions, 3878 flow [2024-06-14 13:18:43,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:43,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:43,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:43,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:18:43,489 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)] === [2024-06-14 13:18:43,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:43,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1916081666, now seen corresponding path program 3 times [2024-06-14 13:18:43,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:43,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515637897] [2024-06-14 13:18:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:43,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:46,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:46,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515637897] [2024-06-14 13:18:46,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515637897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:46,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:46,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:46,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110677451] [2024-06-14 13:18:46,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:46,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:46,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:46,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:46,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:46,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:46,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 323 transitions, 3878 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:46,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:46,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:46,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:48,952 INFO L124 PetriNetUnfolderBase]: 3456/5498 cut-off events. [2024-06-14 13:18:48,952 INFO L125 PetriNetUnfolderBase]: For 460229/460229 co-relation queries the response was YES. [2024-06-14 13:18:48,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35791 conditions, 5498 events. 3456/5498 cut-off events. For 460229/460229 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 33141 event pairs, 800 based on Foata normal form. 14/5504 useless extension candidates. Maximal degree in co-relation 35667. Up to 4831 conditions per place. [2024-06-14 13:18:49,014 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 252 selfloop transitions, 96 changer transitions 0/353 dead transitions. [2024-06-14 13:18:49,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 353 transitions, 4730 flow [2024-06-14 13:18:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:18:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:18:49,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-14 13:18:49,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931818181818182 [2024-06-14 13:18:49,016 INFO L175 Difference]: Start difference. First operand has 252 places, 323 transitions, 3878 flow. Second operand 10 states and 173 transitions. [2024-06-14 13:18:49,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 353 transitions, 4730 flow [2024-06-14 13:18:49,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 353 transitions, 4502 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 13:18:49,749 INFO L231 Difference]: Finished difference. Result has 255 places, 326 transitions, 3930 flow [2024-06-14 13:18:49,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3650, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3930, PETRI_PLACES=255, PETRI_TRANSITIONS=326} [2024-06-14 13:18:49,749 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 210 predicate places. [2024-06-14 13:18:49,749 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 326 transitions, 3930 flow [2024-06-14 13:18:49,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:49,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:49,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:49,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:18:49,750 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)] === [2024-06-14 13:18:49,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:49,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1794842374, now seen corresponding path program 4 times [2024-06-14 13:18:49,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:49,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477919516] [2024-06-14 13:18:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:49,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:53,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:53,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477919516] [2024-06-14 13:18:53,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477919516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:53,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:53,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:18:53,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653905254] [2024-06-14 13:18:53,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:53,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:18:53,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:53,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:18:53,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:18:53,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:53,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 326 transitions, 3930 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:53,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:53,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:53,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:18:55,277 INFO L124 PetriNetUnfolderBase]: 3891/6179 cut-off events. [2024-06-14 13:18:55,277 INFO L125 PetriNetUnfolderBase]: For 679324/679324 co-relation queries the response was YES. [2024-06-14 13:18:55,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43848 conditions, 6179 events. 3891/6179 cut-off events. For 679324/679324 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 37474 event pairs, 949 based on Foata normal form. 14/6185 useless extension candidates. Maximal degree in co-relation 43723. Up to 4668 conditions per place. [2024-06-14 13:18:55,345 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 260 selfloop transitions, 102 changer transitions 0/367 dead transitions. [2024-06-14 13:18:55,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 367 transitions, 5064 flow [2024-06-14 13:18:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:18:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:18:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 13:18:55,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:18:55,347 INFO L175 Difference]: Start difference. First operand has 255 places, 326 transitions, 3930 flow. Second operand 10 states and 180 transitions. [2024-06-14 13:18:55,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 367 transitions, 5064 flow [2024-06-14 13:18:56,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 367 transitions, 4816 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-14 13:18:56,210 INFO L231 Difference]: Finished difference. Result has 258 places, 332 transitions, 4062 flow [2024-06-14 13:18:56,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3682, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4062, PETRI_PLACES=258, PETRI_TRANSITIONS=332} [2024-06-14 13:18:56,210 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 213 predicate places. [2024-06-14 13:18:56,210 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 332 transitions, 4062 flow [2024-06-14 13:18:56,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:56,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:18:56,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:18:56,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:18:56,211 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)] === [2024-06-14 13:18:56,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:18:56,211 INFO L85 PathProgramCache]: Analyzing trace with hash 234121129, now seen corresponding path program 1 times [2024-06-14 13:18:56,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:18:56,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145750454] [2024-06-14 13:18:56,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:18:56,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:18:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:18:59,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:18:59,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:18:59,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145750454] [2024-06-14 13:18:59,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145750454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:18:59,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:18:59,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:18:59,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651946965] [2024-06-14 13:18:59,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:18:59,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:18:59,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:18:59,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:18:59,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:18:59,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:18:59,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 332 transitions, 4062 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:18:59,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:18:59,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:18:59,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:01,473 INFO L124 PetriNetUnfolderBase]: 3906/6227 cut-off events. [2024-06-14 13:19:01,473 INFO L125 PetriNetUnfolderBase]: For 642981/642981 co-relation queries the response was YES. [2024-06-14 13:19:01,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43939 conditions, 6227 events. 3906/6227 cut-off events. For 642981/642981 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38001 event pairs, 937 based on Foata normal form. 2/6228 useless extension candidates. Maximal degree in co-relation 43812. Up to 5764 conditions per place. [2024-06-14 13:19:01,535 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 330 selfloop transitions, 43 changer transitions 0/378 dead transitions. [2024-06-14 13:19:01,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 378 transitions, 5188 flow [2024-06-14 13:19:01,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:01,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 13:19:01,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 13:19:01,537 INFO L175 Difference]: Start difference. First operand has 258 places, 332 transitions, 4062 flow. Second operand 8 states and 158 transitions. [2024-06-14 13:19:01,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 378 transitions, 5188 flow [2024-06-14 13:19:02,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 378 transitions, 4988 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:02,621 INFO L231 Difference]: Finished difference. Result has 261 places, 337 transitions, 4057 flow [2024-06-14 13:19:02,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3862, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4057, PETRI_PLACES=261, PETRI_TRANSITIONS=337} [2024-06-14 13:19:02,621 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-14 13:19:02,621 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 337 transitions, 4057 flow [2024-06-14 13:19:02,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:02,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:02,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:02,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:19:02,622 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)] === [2024-06-14 13:19:02,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:02,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1799255643, now seen corresponding path program 2 times [2024-06-14 13:19:02,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:02,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470406225] [2024-06-14 13:19:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:02,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:06,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:06,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470406225] [2024-06-14 13:19:06,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470406225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:06,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:06,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:06,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153746850] [2024-06-14 13:19:06,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:06,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:06,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:06,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:06,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:06,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:06,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 337 transitions, 4057 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:06,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:06,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:06,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:09,110 INFO L124 PetriNetUnfolderBase]: 3919/6248 cut-off events. [2024-06-14 13:19:09,110 INFO L125 PetriNetUnfolderBase]: For 664060/664060 co-relation queries the response was YES. [2024-06-14 13:19:09,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43974 conditions, 6248 events. 3919/6248 cut-off events. For 664060/664060 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38243 event pairs, 1114 based on Foata normal form. 2/6249 useless extension candidates. Maximal degree in co-relation 43844. Up to 5911 conditions per place. [2024-06-14 13:19:09,210 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 328 selfloop transitions, 40 changer transitions 0/373 dead transitions. [2024-06-14 13:19:09,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 373 transitions, 4969 flow [2024-06-14 13:19:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:09,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:19:09,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 13:19:09,211 INFO L175 Difference]: Start difference. First operand has 261 places, 337 transitions, 4057 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:19:09,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 373 transitions, 4969 flow [2024-06-14 13:19:10,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 373 transitions, 4781 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 13:19:10,318 INFO L231 Difference]: Finished difference. Result has 265 places, 342 transitions, 4038 flow [2024-06-14 13:19:10,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4038, PETRI_PLACES=265, PETRI_TRANSITIONS=342} [2024-06-14 13:19:10,319 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-14 13:19:10,319 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 342 transitions, 4038 flow [2024-06-14 13:19:10,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:10,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:10,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:10,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:19:10,319 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)] === [2024-06-14 13:19:10,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:10,320 INFO L85 PathProgramCache]: Analyzing trace with hash 634839431, now seen corresponding path program 1 times [2024-06-14 13:19:10,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:10,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759253810] [2024-06-14 13:19:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:10,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:13,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:13,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:13,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759253810] [2024-06-14 13:19:13,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759253810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:13,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:13,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:13,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584376609] [2024-06-14 13:19:13,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:13,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:13,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:13,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:13,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:13,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:13,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 342 transitions, 4038 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:13,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:13,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:13,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:15,565 INFO L124 PetriNetUnfolderBase]: 3940/6282 cut-off events. [2024-06-14 13:19:15,565 INFO L125 PetriNetUnfolderBase]: For 682473/682473 co-relation queries the response was YES. [2024-06-14 13:19:15,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44361 conditions, 6282 events. 3940/6282 cut-off events. For 682473/682473 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38521 event pairs, 1084 based on Foata normal form. 1/6282 useless extension candidates. Maximal degree in co-relation 44230. Up to 5814 conditions per place. [2024-06-14 13:19:15,638 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 322 selfloop transitions, 65 changer transitions 0/392 dead transitions. [2024-06-14 13:19:15,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 392 transitions, 5219 flow [2024-06-14 13:19:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:15,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 13:19:15,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 13:19:15,639 INFO L175 Difference]: Start difference. First operand has 265 places, 342 transitions, 4038 flow. Second operand 9 states and 176 transitions. [2024-06-14 13:19:15,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 392 transitions, 5219 flow [2024-06-14 13:19:16,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 392 transitions, 5128 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:16,434 INFO L231 Difference]: Finished difference. Result has 270 places, 348 transitions, 4212 flow [2024-06-14 13:19:16,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3947, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4212, PETRI_PLACES=270, PETRI_TRANSITIONS=348} [2024-06-14 13:19:16,435 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 225 predicate places. [2024-06-14 13:19:16,435 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 348 transitions, 4212 flow [2024-06-14 13:19:16,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:16,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:16,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:16,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:19:16,435 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)] === [2024-06-14 13:19:16,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:16,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1200327003, now seen corresponding path program 3 times [2024-06-14 13:19:16,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:16,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550305781] [2024-06-14 13:19:16,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:16,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:19,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:19,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550305781] [2024-06-14 13:19:19,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550305781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:19,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:19,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:19,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072044552] [2024-06-14 13:19:19,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:19,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:19,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:19,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:19,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:19,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:19,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 348 transitions, 4212 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:19,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:19,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:19,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:21,808 INFO L124 PetriNetUnfolderBase]: 3935/6266 cut-off events. [2024-06-14 13:19:21,808 INFO L125 PetriNetUnfolderBase]: For 697658/697658 co-relation queries the response was YES. [2024-06-14 13:19:21,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45099 conditions, 6266 events. 3935/6266 cut-off events. For 697658/697658 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 38235 event pairs, 1082 based on Foata normal form. 2/6267 useless extension candidates. Maximal degree in co-relation 44966. Up to 5933 conditions per place. [2024-06-14 13:19:21,879 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 328 selfloop transitions, 39 changer transitions 0/372 dead transitions. [2024-06-14 13:19:21,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 372 transitions, 5032 flow [2024-06-14 13:19:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:19:21,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39488636363636365 [2024-06-14 13:19:21,881 INFO L175 Difference]: Start difference. First operand has 270 places, 348 transitions, 4212 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:19:21,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 372 transitions, 5032 flow [2024-06-14 13:19:23,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 372 transitions, 4797 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:23,057 INFO L231 Difference]: Finished difference. Result has 274 places, 349 transitions, 4088 flow [2024-06-14 13:19:23,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3980, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4088, PETRI_PLACES=274, PETRI_TRANSITIONS=349} [2024-06-14 13:19:23,057 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 229 predicate places. [2024-06-14 13:19:23,057 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 349 transitions, 4088 flow [2024-06-14 13:19:23,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:23,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:23,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:23,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:19:23,058 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)] === [2024-06-14 13:19:23,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:23,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1395220407, now seen corresponding path program 2 times [2024-06-14 13:19:23,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:23,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920915243] [2024-06-14 13:19:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:23,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:26,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:26,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920915243] [2024-06-14 13:19:26,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920915243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:26,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:26,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:26,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723117713] [2024-06-14 13:19:26,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:26,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:26,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:26,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:26,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:26,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:26,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 349 transitions, 4088 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:26,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:26,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:26,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:28,694 INFO L124 PetriNetUnfolderBase]: 4012/6404 cut-off events. [2024-06-14 13:19:28,694 INFO L125 PetriNetUnfolderBase]: For 744003/744003 co-relation queries the response was YES. [2024-06-14 13:19:28,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46374 conditions, 6404 events. 4012/6404 cut-off events. For 744003/744003 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39430 event pairs, 938 based on Foata normal form. 1/6403 useless extension candidates. Maximal degree in co-relation 46239. Up to 4713 conditions per place. [2024-06-14 13:19:28,761 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 226 selfloop transitions, 172 changer transitions 0/403 dead transitions. [2024-06-14 13:19:28,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 403 transitions, 5819 flow [2024-06-14 13:19:28,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 13:19:28,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-14 13:19:28,762 INFO L175 Difference]: Start difference. First operand has 274 places, 349 transitions, 4088 flow. Second operand 8 states and 162 transitions. [2024-06-14 13:19:28,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 403 transitions, 5819 flow [2024-06-14 13:19:29,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 403 transitions, 5730 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:29,626 INFO L231 Difference]: Finished difference. Result has 278 places, 363 transitions, 4605 flow [2024-06-14 13:19:29,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3999, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4605, PETRI_PLACES=278, PETRI_TRANSITIONS=363} [2024-06-14 13:19:29,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-14 13:19:29,626 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 363 transitions, 4605 flow [2024-06-14 13:19:29,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:29,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:29,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:29,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:19:29,626 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)] === [2024-06-14 13:19:29,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:29,627 INFO L85 PathProgramCache]: Analyzing trace with hash -153488837, now seen corresponding path program 3 times [2024-06-14 13:19:29,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:29,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772506802] [2024-06-14 13:19:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:29,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:32,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:32,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772506802] [2024-06-14 13:19:32,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772506802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:32,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:32,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:32,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562306219] [2024-06-14 13:19:32,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:32,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:32,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:32,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:32,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:32,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:32,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 363 transitions, 4605 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:32,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:32,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:32,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:35,207 INFO L124 PetriNetUnfolderBase]: 4017/6413 cut-off events. [2024-06-14 13:19:35,208 INFO L125 PetriNetUnfolderBase]: For 767942/767942 co-relation queries the response was YES. [2024-06-14 13:19:35,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48130 conditions, 6413 events. 4017/6413 cut-off events. For 767942/767942 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39498 event pairs, 938 based on Foata normal form. 1/6412 useless extension candidates. Maximal degree in co-relation 47993. Up to 4715 conditions per place. [2024-06-14 13:19:35,295 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 221 selfloop transitions, 175 changer transitions 0/401 dead transitions. [2024-06-14 13:19:35,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 401 transitions, 6177 flow [2024-06-14 13:19:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:19:35,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 13:19:35,296 INFO L175 Difference]: Start difference. First operand has 278 places, 363 transitions, 4605 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:19:35,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 401 transitions, 6177 flow [2024-06-14 13:19:36,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 401 transitions, 5994 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-06-14 13:19:36,738 INFO L231 Difference]: Finished difference. Result has 284 places, 366 transitions, 4859 flow [2024-06-14 13:19:36,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4859, PETRI_PLACES=284, PETRI_TRANSITIONS=366} [2024-06-14 13:19:36,739 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-14 13:19:36,739 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 366 transitions, 4859 flow [2024-06-14 13:19:36,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:36,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:36,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:36,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:19:36,739 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)] === [2024-06-14 13:19:36,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:36,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2047185575, now seen corresponding path program 4 times [2024-06-14 13:19:36,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:36,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670822390] [2024-06-14 13:19:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:36,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:40,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:40,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670822390] [2024-06-14 13:19:40,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670822390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:40,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:40,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:40,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333167778] [2024-06-14 13:19:40,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:40,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:40,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:40,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:40,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:40,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:40,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 366 transitions, 4859 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:40,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:40,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:40,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:42,783 INFO L124 PetriNetUnfolderBase]: 4038/6430 cut-off events. [2024-06-14 13:19:42,783 INFO L125 PetriNetUnfolderBase]: For 789957/789957 co-relation queries the response was YES. [2024-06-14 13:19:42,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48346 conditions, 6430 events. 4038/6430 cut-off events. For 789957/789957 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39527 event pairs, 1074 based on Foata normal form. 1/6430 useless extension candidates. Maximal degree in co-relation 48206. Up to 6045 conditions per place. [2024-06-14 13:19:42,854 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 339 selfloop transitions, 53 changer transitions 0/397 dead transitions. [2024-06-14 13:19:42,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 397 transitions, 6002 flow [2024-06-14 13:19:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:19:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:19:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:19:42,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39141414141414144 [2024-06-14 13:19:42,856 INFO L175 Difference]: Start difference. First operand has 284 places, 366 transitions, 4859 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:19:42,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 397 transitions, 6002 flow [2024-06-14 13:19:44,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 397 transitions, 5643 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:19:44,083 INFO L231 Difference]: Finished difference. Result has 289 places, 372 transitions, 4748 flow [2024-06-14 13:19:44,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4509, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4748, PETRI_PLACES=289, PETRI_TRANSITIONS=372} [2024-06-14 13:19:44,083 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 244 predicate places. [2024-06-14 13:19:44,083 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 372 transitions, 4748 flow [2024-06-14 13:19:44,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:44,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:44,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:44,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:19:44,083 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)] === [2024-06-14 13:19:44,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:44,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1816118751, now seen corresponding path program 5 times [2024-06-14 13:19:44,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:44,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557718734] [2024-06-14 13:19:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:44,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:47,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:47,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557718734] [2024-06-14 13:19:47,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557718734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:47,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:47,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:47,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899854312] [2024-06-14 13:19:47,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:47,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:47,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:47,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:47,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:47,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:47,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 372 transitions, 4748 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:47,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:47,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:47,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:49,946 INFO L124 PetriNetUnfolderBase]: 4043/6427 cut-off events. [2024-06-14 13:19:49,947 INFO L125 PetriNetUnfolderBase]: For 807028/807028 co-relation queries the response was YES. [2024-06-14 13:19:50,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48027 conditions, 6427 events. 4043/6427 cut-off events. For 807028/807028 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39452 event pairs, 1136 based on Foata normal form. 1/6413 useless extension candidates. Maximal degree in co-relation 47885. Up to 4728 conditions per place. [2024-06-14 13:19:50,026 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 244 selfloop transitions, 167 changer transitions 0/416 dead transitions. [2024-06-14 13:19:50,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 416 transitions, 6441 flow [2024-06-14 13:19:50,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:50,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:19:50,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 13:19:50,027 INFO L175 Difference]: Start difference. First operand has 289 places, 372 transitions, 4748 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:19:50,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 416 transitions, 6441 flow [2024-06-14 13:19:51,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 416 transitions, 6298 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:19:51,201 INFO L231 Difference]: Finished difference. Result has 291 places, 382 transitions, 5191 flow [2024-06-14 13:19:51,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4605, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5191, PETRI_PLACES=291, PETRI_TRANSITIONS=382} [2024-06-14 13:19:51,201 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 246 predicate places. [2024-06-14 13:19:51,201 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 382 transitions, 5191 flow [2024-06-14 13:19:51,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:51,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:51,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:51,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:19:51,202 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)] === [2024-06-14 13:19:51,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:51,202 INFO L85 PathProgramCache]: Analyzing trace with hash -667176379, now seen corresponding path program 6 times [2024-06-14 13:19:51,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:51,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229737660] [2024-06-14 13:19:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:51,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:19:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:19:54,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:19:54,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229737660] [2024-06-14 13:19:54,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229737660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:19:54,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:19:54,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:19:54,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599055734] [2024-06-14 13:19:54,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:19:54,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:19:54,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:19:54,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:19:54,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:19:54,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:19:54,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 382 transitions, 5191 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:54,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:19:54,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:19:54,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:19:57,311 INFO L124 PetriNetUnfolderBase]: 4048/6436 cut-off events. [2024-06-14 13:19:57,311 INFO L125 PetriNetUnfolderBase]: For 828449/828449 co-relation queries the response was YES. [2024-06-14 13:19:57,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48973 conditions, 6436 events. 4048/6436 cut-off events. For 828449/828449 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 39553 event pairs, 1136 based on Foata normal form. 1/6422 useless extension candidates. Maximal degree in co-relation 48830. Up to 4730 conditions per place. [2024-06-14 13:19:57,391 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 242 selfloop transitions, 168 changer transitions 0/415 dead transitions. [2024-06-14 13:19:57,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 415 transitions, 6724 flow [2024-06-14 13:19:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:19:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:19:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:19:57,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 13:19:57,392 INFO L175 Difference]: Start difference. First operand has 291 places, 382 transitions, 5191 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:19:57,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 415 transitions, 6724 flow [2024-06-14 13:19:58,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 415 transitions, 6535 flow, removed 74 selfloop flow, removed 3 redundant places. [2024-06-14 13:19:58,493 INFO L231 Difference]: Finished difference. Result has 296 places, 385 transitions, 5432 flow [2024-06-14 13:19:58,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5032, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5432, PETRI_PLACES=296, PETRI_TRANSITIONS=385} [2024-06-14 13:19:58,494 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-14 13:19:58,494 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 385 transitions, 5432 flow [2024-06-14 13:19:58,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:19:58,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:19:58,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:19:58,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:19:58,494 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)] === [2024-06-14 13:19:58,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:19:58,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1654744507, now seen corresponding path program 7 times [2024-06-14 13:19:58,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:19:58,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803433582] [2024-06-14 13:19:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:19:58,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:19:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:02,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:02,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803433582] [2024-06-14 13:20:02,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803433582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:02,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:02,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:02,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315218783] [2024-06-14 13:20:02,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:02,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:02,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:02,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:02,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:02,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 385 transitions, 5432 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:02,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:02,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:02,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:04,712 INFO L124 PetriNetUnfolderBase]: 4079/6489 cut-off events. [2024-06-14 13:20:04,712 INFO L125 PetriNetUnfolderBase]: For 864811/864811 co-relation queries the response was YES. [2024-06-14 13:20:04,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50286 conditions, 6489 events. 4079/6489 cut-off events. For 864811/864811 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 39919 event pairs, 1142 based on Foata normal form. 3/6477 useless extension candidates. Maximal degree in co-relation 50141. Up to 4747 conditions per place. [2024-06-14 13:20:04,812 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 242 selfloop transitions, 172 changer transitions 0/419 dead transitions. [2024-06-14 13:20:04,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 419 transitions, 7021 flow [2024-06-14 13:20:04,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:20:04,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 13:20:04,814 INFO L175 Difference]: Start difference. First operand has 296 places, 385 transitions, 5432 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:20:04,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 419 transitions, 7021 flow [2024-06-14 13:20:06,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 419 transitions, 6658 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:20:06,134 INFO L231 Difference]: Finished difference. Result has 299 places, 392 transitions, 5570 flow [2024-06-14 13:20:06,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5079, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5570, PETRI_PLACES=299, PETRI_TRANSITIONS=392} [2024-06-14 13:20:06,134 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-14 13:20:06,134 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 392 transitions, 5570 flow [2024-06-14 13:20:06,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:06,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:06,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:06,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:20:06,135 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)] === [2024-06-14 13:20:06,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:06,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1915370247, now seen corresponding path program 8 times [2024-06-14 13:20:06,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:06,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392586812] [2024-06-14 13:20:06,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:06,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:09,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:09,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392586812] [2024-06-14 13:20:09,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392586812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:09,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:09,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:09,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581586203] [2024-06-14 13:20:09,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:09,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:09,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:09,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:09,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:09,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 392 transitions, 5570 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:09,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:09,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:09,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:11,466 INFO L124 PetriNetUnfolderBase]: 4150/6612 cut-off events. [2024-06-14 13:20:11,467 INFO L125 PetriNetUnfolderBase]: For 912808/912808 co-relation queries the response was YES. [2024-06-14 13:20:11,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51730 conditions, 6612 events. 4150/6612 cut-off events. For 912808/912808 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40856 event pairs, 1067 based on Foata normal form. 3/6607 useless extension candidates. Maximal degree in co-relation 51584. Up to 5732 conditions per place. [2024-06-14 13:20:11,545 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 320 selfloop transitions, 96 changer transitions 0/421 dead transitions. [2024-06-14 13:20:11,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 421 transitions, 6936 flow [2024-06-14 13:20:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:20:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:20:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:20:11,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:20:11,546 INFO L175 Difference]: Start difference. First operand has 299 places, 392 transitions, 5570 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:20:11,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 421 transitions, 6936 flow [2024-06-14 13:20:12,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 421 transitions, 6593 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:12,933 INFO L231 Difference]: Finished difference. Result has 305 places, 398 transitions, 5577 flow [2024-06-14 13:20:12,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5239, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5577, PETRI_PLACES=305, PETRI_TRANSITIONS=398} [2024-06-14 13:20:12,934 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 260 predicate places. [2024-06-14 13:20:12,934 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 398 transitions, 5577 flow [2024-06-14 13:20:12,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:12,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:12,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:12,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:20:12,935 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)] === [2024-06-14 13:20:12,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:12,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1065476895, now seen corresponding path program 9 times [2024-06-14 13:20:12,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:12,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131923446] [2024-06-14 13:20:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:12,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:15,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:15,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131923446] [2024-06-14 13:20:15,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131923446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:15,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:15,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:20:15,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239992864] [2024-06-14 13:20:15,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:15,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:20:15,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:15,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:20:15,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:20:15,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:15,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 398 transitions, 5577 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:15,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:15,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:15,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:18,272 INFO L124 PetriNetUnfolderBase]: 4141/6600 cut-off events. [2024-06-14 13:20:18,272 INFO L125 PetriNetUnfolderBase]: For 916798/916798 co-relation queries the response was YES. [2024-06-14 13:20:18,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51200 conditions, 6600 events. 4141/6600 cut-off events. For 916798/916798 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40794 event pairs, 1040 based on Foata normal form. 3/6595 useless extension candidates. Maximal degree in co-relation 51052. Up to 5728 conditions per place. [2024-06-14 13:20:18,353 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 320 selfloop transitions, 99 changer transitions 0/424 dead transitions. [2024-06-14 13:20:18,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 424 transitions, 6863 flow [2024-06-14 13:20:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:20:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:20:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-14 13:20:18,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-14 13:20:18,354 INFO L175 Difference]: Start difference. First operand has 305 places, 398 transitions, 5577 flow. Second operand 10 states and 172 transitions. [2024-06-14 13:20:18,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 424 transitions, 6863 flow [2024-06-14 13:20:19,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 424 transitions, 6588 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 13:20:19,945 INFO L231 Difference]: Finished difference. Result has 308 places, 399 transitions, 5557 flow [2024-06-14 13:20:19,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5302, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5557, PETRI_PLACES=308, PETRI_TRANSITIONS=399} [2024-06-14 13:20:19,945 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-14 13:20:19,945 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 399 transitions, 5557 flow [2024-06-14 13:20:19,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:19,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:19,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:19,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:20:19,945 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)] === [2024-06-14 13:20:19,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:19,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1013780412, now seen corresponding path program 1 times [2024-06-14 13:20:19,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:19,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302280394] [2024-06-14 13:20:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:19,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:23,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:23,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302280394] [2024-06-14 13:20:23,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302280394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:23,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:23,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:23,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521057966] [2024-06-14 13:20:23,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:23,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:23,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:23,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:23,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:23,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:23,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 399 transitions, 5557 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:23,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:23,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:23,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:26,260 INFO L124 PetriNetUnfolderBase]: 4450/7118 cut-off events. [2024-06-14 13:20:26,260 INFO L125 PetriNetUnfolderBase]: For 1172204/1172212 co-relation queries the response was YES. [2024-06-14 13:20:26,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58029 conditions, 7118 events. 4450/7118 cut-off events. For 1172204/1172212 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 44859 event pairs, 1159 based on Foata normal form. 24/7138 useless extension candidates. Maximal degree in co-relation 57879. Up to 5247 conditions per place. [2024-06-14 13:20:26,377 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 330 selfloop transitions, 113 changer transitions 0/448 dead transitions. [2024-06-14 13:20:26,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 448 transitions, 7135 flow [2024-06-14 13:20:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 13:20:26,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 13:20:26,379 INFO L175 Difference]: Start difference. First operand has 308 places, 399 transitions, 5557 flow. Second operand 8 states and 155 transitions. [2024-06-14 13:20:26,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 448 transitions, 7135 flow [2024-06-14 13:20:28,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 448 transitions, 6957 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:20:28,559 INFO L231 Difference]: Finished difference. Result has 311 places, 405 transitions, 5787 flow [2024-06-14 13:20:28,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5379, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5787, PETRI_PLACES=311, PETRI_TRANSITIONS=405} [2024-06-14 13:20:28,560 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-14 13:20:28,560 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 405 transitions, 5787 flow [2024-06-14 13:20:28,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:28,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:28,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:28,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:20:28,561 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)] === [2024-06-14 13:20:28,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:28,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1534915500, now seen corresponding path program 2 times [2024-06-14 13:20:28,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:28,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062865139] [2024-06-14 13:20:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:28,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:32,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:32,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062865139] [2024-06-14 13:20:32,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062865139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:32,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:32,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:32,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479247916] [2024-06-14 13:20:32,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:32,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:32,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:32,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:32,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:32,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:32,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 405 transitions, 5787 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:32,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:32,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:32,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:34,872 INFO L124 PetriNetUnfolderBase]: 4538/7240 cut-off events. [2024-06-14 13:20:34,873 INFO L125 PetriNetUnfolderBase]: For 1242809/1242817 co-relation queries the response was YES. [2024-06-14 13:20:34,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59858 conditions, 7240 events. 4538/7240 cut-off events. For 1242809/1242817 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45631 event pairs, 1266 based on Foata normal form. 32/7268 useless extension candidates. Maximal degree in co-relation 59705. Up to 6111 conditions per place. [2024-06-14 13:20:34,956 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 320 selfloop transitions, 112 changer transitions 0/437 dead transitions. [2024-06-14 13:20:34,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 437 transitions, 6798 flow [2024-06-14 13:20:34,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:20:34,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 13:20:34,958 INFO L175 Difference]: Start difference. First operand has 311 places, 405 transitions, 5787 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:20:34,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 437 transitions, 6798 flow [2024-06-14 13:20:36,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 437 transitions, 6636 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 13:20:36,911 INFO L231 Difference]: Finished difference. Result has 316 places, 407 transitions, 5912 flow [2024-06-14 13:20:36,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5625, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5912, PETRI_PLACES=316, PETRI_TRANSITIONS=407} [2024-06-14 13:20:36,911 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-14 13:20:36,911 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 407 transitions, 5912 flow [2024-06-14 13:20:36,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:36,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:36,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:36,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:20:36,911 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)] === [2024-06-14 13:20:36,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:36,912 INFO L85 PathProgramCache]: Analyzing trace with hash 290460766, now seen corresponding path program 3 times [2024-06-14 13:20:36,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:36,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604097148] [2024-06-14 13:20:36,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:36,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:40,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:40,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604097148] [2024-06-14 13:20:40,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604097148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:40,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:40,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:20:40,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038146507] [2024-06-14 13:20:40,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:40,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:20:40,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:40,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:20:40,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:20:40,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:40,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 407 transitions, 5912 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:40,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:40,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:40,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:43,190 INFO L124 PetriNetUnfolderBase]: 4689/7471 cut-off events. [2024-06-14 13:20:43,190 INFO L125 PetriNetUnfolderBase]: For 1299621/1299629 co-relation queries the response was YES. [2024-06-14 13:20:43,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63278 conditions, 7471 events. 4689/7471 cut-off events. For 1299621/1299629 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 47263 event pairs, 1271 based on Foata normal form. 24/7491 useless extension candidates. Maximal degree in co-relation 63123. Up to 6125 conditions per place. [2024-06-14 13:20:43,283 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 328 selfloop transitions, 111 changer transitions 0/444 dead transitions. [2024-06-14 13:20:43,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 444 transitions, 7182 flow [2024-06-14 13:20:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:20:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:20:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 13:20:43,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 13:20:43,284 INFO L175 Difference]: Start difference. First operand has 316 places, 407 transitions, 5912 flow. Second operand 8 states and 149 transitions. [2024-06-14 13:20:43,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 444 transitions, 7182 flow [2024-06-14 13:20:46,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 444 transitions, 6920 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:20:46,094 INFO L231 Difference]: Finished difference. Result has 319 places, 411 transitions, 5992 flow [2024-06-14 13:20:46,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5992, PETRI_PLACES=319, PETRI_TRANSITIONS=411} [2024-06-14 13:20:46,095 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-14 13:20:46,095 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 411 transitions, 5992 flow [2024-06-14 13:20:46,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:46,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:46,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:46,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:20:46,095 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)] === [2024-06-14 13:20:46,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:46,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1390873776, now seen corresponding path program 4 times [2024-06-14 13:20:46,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:46,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550364347] [2024-06-14 13:20:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:46,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:20:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:20:49,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:20:49,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550364347] [2024-06-14 13:20:49,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550364347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:20:49,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:20:49,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:20:49,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082244935] [2024-06-14 13:20:49,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:20:49,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:20:49,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:20:49,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:20:49,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:20:49,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:20:49,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 411 transitions, 5992 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:49,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:20:49,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:20:49,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:20:53,187 INFO L124 PetriNetUnfolderBase]: 4777/7601 cut-off events. [2024-06-14 13:20:53,187 INFO L125 PetriNetUnfolderBase]: For 1365581/1365581 co-relation queries the response was YES. [2024-06-14 13:20:53,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64368 conditions, 7601 events. 4777/7601 cut-off events. For 1365581/1365581 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 48148 event pairs, 1363 based on Foata normal form. 24/7616 useless extension candidates. Maximal degree in co-relation 64211. Up to 6480 conditions per place. [2024-06-14 13:20:53,287 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 321 selfloop transitions, 124 changer transitions 0/450 dead transitions. [2024-06-14 13:20:53,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 450 transitions, 7051 flow [2024-06-14 13:20:53,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:20:53,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:20:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-14 13:20:53,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39462809917355374 [2024-06-14 13:20:53,289 INFO L175 Difference]: Start difference. First operand has 319 places, 411 transitions, 5992 flow. Second operand 11 states and 191 transitions. [2024-06-14 13:20:53,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 450 transitions, 7051 flow [2024-06-14 13:20:56,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 450 transitions, 6869 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 13:20:56,411 INFO L231 Difference]: Finished difference. Result has 326 places, 413 transitions, 6129 flow [2024-06-14 13:20:56,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5810, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6129, PETRI_PLACES=326, PETRI_TRANSITIONS=413} [2024-06-14 13:20:56,412 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 281 predicate places. [2024-06-14 13:20:56,412 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 413 transitions, 6129 flow [2024-06-14 13:20:56,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:20:56,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:20:56,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:20:56,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:20:56,412 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)] === [2024-06-14 13:20:56,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:20:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1640430226, now seen corresponding path program 1 times [2024-06-14 13:20:56,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:20:56,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860399588] [2024-06-14 13:20:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:20:56,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:20:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:00,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:00,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:00,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860399588] [2024-06-14 13:21:00,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860399588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:00,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:00,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:21:00,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869409160] [2024-06-14 13:21:00,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:00,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:21:00,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:00,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:21:00,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:21:00,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:00,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 413 transitions, 6129 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:00,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:00,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:00,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:03,453 INFO L124 PetriNetUnfolderBase]: 4905/7797 cut-off events. [2024-06-14 13:21:03,453 INFO L125 PetriNetUnfolderBase]: For 1411620/1411620 co-relation queries the response was YES. [2024-06-14 13:21:03,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67378 conditions, 7797 events. 4905/7797 cut-off events. For 1411620/1411620 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 49454 event pairs, 1383 based on Foata normal form. 16/7804 useless extension candidates. Maximal degree in co-relation 67219. Up to 6440 conditions per place. [2024-06-14 13:21:03,563 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 321 selfloop transitions, 131 changer transitions 0/457 dead transitions. [2024-06-14 13:21:03,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 457 transitions, 7466 flow [2024-06-14 13:21:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:21:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:21:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-14 13:21:03,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3987603305785124 [2024-06-14 13:21:03,564 INFO L175 Difference]: Start difference. First operand has 326 places, 413 transitions, 6129 flow. Second operand 11 states and 193 transitions. [2024-06-14 13:21:03,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 457 transitions, 7466 flow [2024-06-14 13:21:06,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 457 transitions, 7172 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-14 13:21:06,368 INFO L231 Difference]: Finished difference. Result has 329 places, 417 transitions, 6243 flow [2024-06-14 13:21:06,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5835, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6243, PETRI_PLACES=329, PETRI_TRANSITIONS=417} [2024-06-14 13:21:06,369 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-14 13:21:06,369 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 417 transitions, 6243 flow [2024-06-14 13:21:06,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:06,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:06,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:06,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:21:06,369 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)] === [2024-06-14 13:21:06,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:06,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2018690766, now seen corresponding path program 5 times [2024-06-14 13:21:06,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:06,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649652842] [2024-06-14 13:21:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:06,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:06,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:10,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:10,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649652842] [2024-06-14 13:21:10,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649652842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:10,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:10,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:21:10,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50416144] [2024-06-14 13:21:10,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:10,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:21:10,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:10,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:21:10,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:21:10,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:10,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 417 transitions, 6243 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:10,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:10,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:10,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:13,067 INFO L124 PetriNetUnfolderBase]: 4849/7721 cut-off events. [2024-06-14 13:21:13,067 INFO L125 PetriNetUnfolderBase]: For 1359847/1359847 co-relation queries the response was YES. [2024-06-14 13:21:13,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64534 conditions, 7721 events. 4849/7721 cut-off events. For 1359847/1359847 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 49073 event pairs, 1389 based on Foata normal form. 24/7736 useless extension candidates. Maximal degree in co-relation 64373. Up to 6596 conditions per place. [2024-06-14 13:21:13,181 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 326 selfloop transitions, 118 changer transitions 0/449 dead transitions. [2024-06-14 13:21:13,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 449 transitions, 7229 flow [2024-06-14 13:21:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:21:13,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:21:13,184 INFO L175 Difference]: Start difference. First operand has 329 places, 417 transitions, 6243 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:21:13,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 449 transitions, 7229 flow [2024-06-14 13:21:15,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 449 transitions, 6966 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-14 13:21:15,842 INFO L231 Difference]: Finished difference. Result has 331 places, 417 transitions, 6222 flow [2024-06-14 13:21:15,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5980, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6222, PETRI_PLACES=331, PETRI_TRANSITIONS=417} [2024-06-14 13:21:15,843 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-14 13:21:15,843 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 417 transitions, 6222 flow [2024-06-14 13:21:15,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:15,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:15,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:15,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:21:15,843 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)] === [2024-06-14 13:21:15,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1646155678, now seen corresponding path program 6 times [2024-06-14 13:21:15,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:15,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457617807] [2024-06-14 13:21:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:19,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:19,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457617807] [2024-06-14 13:21:19,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457617807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:19,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:19,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:21:19,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35451235] [2024-06-14 13:21:19,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:19,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:21:19,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:19,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:21:19,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:21:19,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:19,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 417 transitions, 6222 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:19,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:19,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:19,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:22,448 INFO L124 PetriNetUnfolderBase]: 5000/7954 cut-off events. [2024-06-14 13:21:22,448 INFO L125 PetriNetUnfolderBase]: For 1415967/1415967 co-relation queries the response was YES. [2024-06-14 13:21:22,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67300 conditions, 7954 events. 5000/7954 cut-off events. For 1415967/1415967 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 50805 event pairs, 1408 based on Foata normal form. 16/7961 useless extension candidates. Maximal degree in co-relation 67137. Up to 6472 conditions per place. [2024-06-14 13:21:22,567 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 334 selfloop transitions, 117 changer transitions 0/456 dead transitions. [2024-06-14 13:21:22,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 456 transitions, 7546 flow [2024-06-14 13:21:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:22,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:21:22,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 13:21:22,568 INFO L175 Difference]: Start difference. First operand has 331 places, 417 transitions, 6222 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:21:22,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 456 transitions, 7546 flow [2024-06-14 13:21:25,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 456 transitions, 7294 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:21:25,501 INFO L231 Difference]: Finished difference. Result has 333 places, 421 transitions, 6347 flow [2024-06-14 13:21:25,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6347, PETRI_PLACES=333, PETRI_TRANSITIONS=421} [2024-06-14 13:21:25,502 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-14 13:21:25,502 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 421 transitions, 6347 flow [2024-06-14 13:21:25,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:25,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:25,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:25,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:21:25,502 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)] === [2024-06-14 13:21:25,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:25,503 INFO L85 PathProgramCache]: Analyzing trace with hash -121485552, now seen corresponding path program 7 times [2024-06-14 13:21:25,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:25,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015013447] [2024-06-14 13:21:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:25,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:29,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:29,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015013447] [2024-06-14 13:21:29,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015013447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:29,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:29,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:29,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983783902] [2024-06-14 13:21:29,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:29,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:29,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:29,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:29,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:29,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 421 transitions, 6347 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:29,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:29,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:29,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:31,711 INFO L124 PetriNetUnfolderBase]: 5228/8277 cut-off events. [2024-06-14 13:21:31,712 INFO L125 PetriNetUnfolderBase]: For 1706065/1706065 co-relation queries the response was YES. [2024-06-14 13:21:31,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69289 conditions, 8277 events. 5228/8277 cut-off events. For 1706065/1706065 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 52886 event pairs, 1364 based on Foata normal form. 68/8337 useless extension candidates. Maximal degree in co-relation 69124. Up to 7249 conditions per place. [2024-06-14 13:21:31,840 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 347 selfloop transitions, 95 changer transitions 7/454 dead transitions. [2024-06-14 13:21:31,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 454 transitions, 7390 flow [2024-06-14 13:21:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:21:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:21:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-14 13:21:31,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:21:31,841 INFO L175 Difference]: Start difference. First operand has 333 places, 421 transitions, 6347 flow. Second operand 10 states and 176 transitions. [2024-06-14 13:21:31,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 454 transitions, 7390 flow [2024-06-14 13:21:35,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 454 transitions, 7184 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 13:21:35,103 INFO L231 Difference]: Finished difference. Result has 338 places, 418 transitions, 6309 flow [2024-06-14 13:21:35,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6141, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6309, PETRI_PLACES=338, PETRI_TRANSITIONS=418} [2024-06-14 13:21:35,104 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-14 13:21:35,104 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 418 transitions, 6309 flow [2024-06-14 13:21:35,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:35,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:35,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:35,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:21:35,104 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)] === [2024-06-14 13:21:35,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:35,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2009167430, now seen corresponding path program 2 times [2024-06-14 13:21:35,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:35,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140854032] [2024-06-14 13:21:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:35,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:38,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:38,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140854032] [2024-06-14 13:21:38,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140854032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:38,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:38,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:38,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019357337] [2024-06-14 13:21:38,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:38,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:38,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:38,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:38,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:38,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 418 transitions, 6309 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:38,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:38,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:38,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:41,685 INFO L124 PetriNetUnfolderBase]: 5148/8169 cut-off events. [2024-06-14 13:21:41,685 INFO L125 PetriNetUnfolderBase]: For 1590424/1590424 co-relation queries the response was YES. [2024-06-14 13:21:41,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67139 conditions, 8169 events. 5148/8169 cut-off events. For 1590424/1590424 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 52068 event pairs, 1210 based on Foata normal form. 56/8217 useless extension candidates. Maximal degree in co-relation 66972. Up to 6283 conditions per place. [2024-06-14 13:21:41,783 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 340 selfloop transitions, 96 changer transitions 17/458 dead transitions. [2024-06-14 13:21:41,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 458 transitions, 7597 flow [2024-06-14 13:21:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:21:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:21:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 13:21:41,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41363636363636364 [2024-06-14 13:21:41,785 INFO L175 Difference]: Start difference. First operand has 338 places, 418 transitions, 6309 flow. Second operand 10 states and 182 transitions. [2024-06-14 13:21:41,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 458 transitions, 7597 flow [2024-06-14 13:21:44,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 458 transitions, 7387 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:21:44,628 INFO L231 Difference]: Finished difference. Result has 341 places, 407 transitions, 6151 flow [2024-06-14 13:21:44,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6099, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6151, PETRI_PLACES=341, PETRI_TRANSITIONS=407} [2024-06-14 13:21:44,629 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-14 13:21:44,629 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 407 transitions, 6151 flow [2024-06-14 13:21:44,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:44,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:44,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:44,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:21:44,629 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)] === [2024-06-14 13:21:44,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash 531918502, now seen corresponding path program 3 times [2024-06-14 13:21:44,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:44,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516805776] [2024-06-14 13:21:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:44,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:48,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:48,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516805776] [2024-06-14 13:21:48,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516805776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:48,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:48,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:48,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521580747] [2024-06-14 13:21:48,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:48,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:48,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:48,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:48,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:48,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 407 transitions, 6151 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:48,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:48,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:48,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:50,619 INFO L124 PetriNetUnfolderBase]: 4696/7479 cut-off events. [2024-06-14 13:21:50,619 INFO L125 PetriNetUnfolderBase]: For 1331179/1331179 co-relation queries the response was YES. [2024-06-14 13:21:50,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57618 conditions, 7479 events. 4696/7479 cut-off events. For 1331179/1331179 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 47472 event pairs, 1152 based on Foata normal form. 68/7539 useless extension candidates. Maximal degree in co-relation 57450. Up to 6495 conditions per place. [2024-06-14 13:21:50,709 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 350 selfloop transitions, 73 changer transitions 7/435 dead transitions. [2024-06-14 13:21:50,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 435 transitions, 7103 flow [2024-06-14 13:21:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:50,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:21:50,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-14 13:21:50,710 INFO L175 Difference]: Start difference. First operand has 341 places, 407 transitions, 6151 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:21:50,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 435 transitions, 7103 flow [2024-06-14 13:21:52,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 435 transitions, 6718 flow, removed 41 selfloop flow, removed 11 redundant places. [2024-06-14 13:21:52,979 INFO L231 Difference]: Finished difference. Result has 339 places, 402 transitions, 5837 flow [2024-06-14 13:21:52,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5766, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5837, PETRI_PLACES=339, PETRI_TRANSITIONS=402} [2024-06-14 13:21:52,979 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-14 13:21:52,980 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 402 transitions, 5837 flow [2024-06-14 13:21:52,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:52,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:21:52,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:21:52,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:21:52,980 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)] === [2024-06-14 13:21:52,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:21:52,980 INFO L85 PathProgramCache]: Analyzing trace with hash 531764680, now seen corresponding path program 8 times [2024-06-14 13:21:52,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:21:52,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236870255] [2024-06-14 13:21:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:21:52,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:21:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:21:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:21:56,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:21:56,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236870255] [2024-06-14 13:21:56,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236870255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:21:56,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:21:56,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:21:56,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749616383] [2024-06-14 13:21:56,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:21:56,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:21:56,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:21:56,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:21:56,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:21:56,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:21:56,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 402 transitions, 5837 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:21:56,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:21:56,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:21:56,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:21:59,083 INFO L124 PetriNetUnfolderBase]: 5005/7994 cut-off events. [2024-06-14 13:21:59,083 INFO L125 PetriNetUnfolderBase]: For 1531017/1531017 co-relation queries the response was YES. [2024-06-14 13:21:59,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63479 conditions, 7994 events. 5005/7994 cut-off events. For 1531017/1531017 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 51083 event pairs, 1189 based on Foata normal form. 56/8042 useless extension candidates. Maximal degree in co-relation 63312. Up to 6148 conditions per place. [2024-06-14 13:21:59,180 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 361 selfloop transitions, 73 changer transitions 0/439 dead transitions. [2024-06-14 13:21:59,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 439 transitions, 7088 flow [2024-06-14 13:21:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:21:59,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:21:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 13:21:59,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 13:21:59,182 INFO L175 Difference]: Start difference. First operand has 339 places, 402 transitions, 5837 flow. Second operand 9 states and 164 transitions. [2024-06-14 13:21:59,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 439 transitions, 7088 flow [2024-06-14 13:22:02,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 439 transitions, 6733 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 13:22:02,023 INFO L231 Difference]: Finished difference. Result has 339 places, 404 transitions, 5708 flow [2024-06-14 13:22:02,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5482, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5708, PETRI_PLACES=339, PETRI_TRANSITIONS=404} [2024-06-14 13:22:02,024 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-14 13:22:02,024 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 404 transitions, 5708 flow [2024-06-14 13:22:02,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:02,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:02,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:02,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:22:02,024 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)] === [2024-06-14 13:22:02,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:02,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1390754667, now seen corresponding path program 1 times [2024-06-14 13:22:02,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:02,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70586940] [2024-06-14 13:22:02,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:02,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:05,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:05,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70586940] [2024-06-14 13:22:05,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70586940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:05,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:05,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:05,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654823256] [2024-06-14 13:22:05,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:05,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:05,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:05,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:05,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:05,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:22:05,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 404 transitions, 5708 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:05,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:05,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:22:05,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:07,905 INFO L124 PetriNetUnfolderBase]: 4987/7982 cut-off events. [2024-06-14 13:22:07,905 INFO L125 PetriNetUnfolderBase]: For 1257212/1257212 co-relation queries the response was YES. [2024-06-14 13:22:07,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62680 conditions, 7982 events. 4987/7982 cut-off events. For 1257212/1257212 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 50991 event pairs, 1306 based on Foata normal form. 8/7982 useless extension candidates. Maximal degree in co-relation 62512. Up to 7284 conditions per place. [2024-06-14 13:22:08,021 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 392 selfloop transitions, 36 changer transitions 0/433 dead transitions. [2024-06-14 13:22:08,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 433 transitions, 6896 flow [2024-06-14 13:22:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 13:22:08,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-06-14 13:22:08,022 INFO L175 Difference]: Start difference. First operand has 339 places, 404 transitions, 5708 flow. Second operand 7 states and 127 transitions. [2024-06-14 13:22:08,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 433 transitions, 6896 flow [2024-06-14 13:22:10,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 433 transitions, 6464 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-14 13:22:10,495 INFO L231 Difference]: Finished difference. Result has 337 places, 404 transitions, 5352 flow [2024-06-14 13:22:10,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5276, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5352, PETRI_PLACES=337, PETRI_TRANSITIONS=404} [2024-06-14 13:22:10,495 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 292 predicate places. [2024-06-14 13:22:10,495 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 404 transitions, 5352 flow [2024-06-14 13:22:10,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:10,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:10,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:10,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:22:10,495 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)] === [2024-06-14 13:22:10,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:10,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1097753435, now seen corresponding path program 2 times [2024-06-14 13:22:10,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:10,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536031626] [2024-06-14 13:22:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:10,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:13,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:13,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536031626] [2024-06-14 13:22:13,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536031626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:13,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:13,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:13,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045922020] [2024-06-14 13:22:13,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:13,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:13,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:13,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:22:13,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 404 transitions, 5352 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:13,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:13,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:22:13,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:16,126 INFO L124 PetriNetUnfolderBase]: 4969/7952 cut-off events. [2024-06-14 13:22:16,127 INFO L125 PetriNetUnfolderBase]: For 1228164/1228164 co-relation queries the response was YES. [2024-06-14 13:22:16,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59378 conditions, 7952 events. 4969/7952 cut-off events. For 1228164/1228164 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 50770 event pairs, 1417 based on Foata normal form. 8/7952 useless extension candidates. Maximal degree in co-relation 59212. Up to 7388 conditions per place. [2024-06-14 13:22:16,241 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 385 selfloop transitions, 37 changer transitions 0/427 dead transitions. [2024-06-14 13:22:16,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 427 transitions, 6302 flow [2024-06-14 13:22:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:22:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:22:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-14 13:22:16,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39935064935064934 [2024-06-14 13:22:16,242 INFO L175 Difference]: Start difference. First operand has 337 places, 404 transitions, 5352 flow. Second operand 7 states and 123 transitions. [2024-06-14 13:22:16,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 427 transitions, 6302 flow [2024-06-14 13:22:18,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 427 transitions, 6188 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:22:18,917 INFO L231 Difference]: Finished difference. Result has 338 places, 404 transitions, 5318 flow [2024-06-14 13:22:18,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5238, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5318, PETRI_PLACES=338, PETRI_TRANSITIONS=404} [2024-06-14 13:22:18,917 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-14 13:22:18,917 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 404 transitions, 5318 flow [2024-06-14 13:22:18,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:18,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:18,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:18,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:22:18,918 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)] === [2024-06-14 13:22:18,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:18,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1243524029, now seen corresponding path program 1 times [2024-06-14 13:22:18,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:18,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823135166] [2024-06-14 13:22:18,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:18,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:21,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:21,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823135166] [2024-06-14 13:22:21,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823135166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:21,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:21,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:21,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981377518] [2024-06-14 13:22:21,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:21,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:21,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:21,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:21,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:21,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:22:21,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 404 transitions, 5318 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:21,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:21,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:22:21,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:24,503 INFO L124 PetriNetUnfolderBase]: 4979/7978 cut-off events. [2024-06-14 13:22:24,503 INFO L125 PetriNetUnfolderBase]: For 1218482/1218482 co-relation queries the response was YES. [2024-06-14 13:22:24,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59326 conditions, 7978 events. 4979/7978 cut-off events. For 1218482/1218482 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 51236 event pairs, 1434 based on Foata normal form. 2/7979 useless extension candidates. Maximal degree in co-relation 59160. Up to 7464 conditions per place. [2024-06-14 13:22:24,611 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 388 selfloop transitions, 59 changer transitions 0/452 dead transitions. [2024-06-14 13:22:24,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 452 transitions, 6606 flow [2024-06-14 13:22:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 13:22:24,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 13:22:24,613 INFO L175 Difference]: Start difference. First operand has 338 places, 404 transitions, 5318 flow. Second operand 9 states and 174 transitions. [2024-06-14 13:22:24,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 452 transitions, 6606 flow [2024-06-14 13:22:27,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 452 transitions, 6514 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:22:27,534 INFO L231 Difference]: Finished difference. Result has 341 places, 407 transitions, 5392 flow [2024-06-14 13:22:27,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5226, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5392, PETRI_PLACES=341, PETRI_TRANSITIONS=407} [2024-06-14 13:22:27,534 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-14 13:22:27,534 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 407 transitions, 5392 flow [2024-06-14 13:22:27,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:27,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:27,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:27,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:22:27,534 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)] === [2024-06-14 13:22:27,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:27,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2036993085, now seen corresponding path program 2 times [2024-06-14 13:22:27,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:27,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454897146] [2024-06-14 13:22:27,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:27,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:30,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:30,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454897146] [2024-06-14 13:22:30,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454897146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:30,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:30,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:30,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546502714] [2024-06-14 13:22:30,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:30,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:30,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:30,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:30,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:30,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:22:30,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 407 transitions, 5392 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:30,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:30,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:22:30,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:33,638 INFO L124 PetriNetUnfolderBase]: 4973/7974 cut-off events. [2024-06-14 13:22:33,638 INFO L125 PetriNetUnfolderBase]: For 1229211/1229211 co-relation queries the response was YES. [2024-06-14 13:22:33,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59285 conditions, 7974 events. 4973/7974 cut-off events. For 1229211/1229211 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 51241 event pairs, 1437 based on Foata normal form. 2/7975 useless extension candidates. Maximal degree in co-relation 59118. Up to 7459 conditions per place. [2024-06-14 13:22:33,747 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 388 selfloop transitions, 59 changer transitions 0/452 dead transitions. [2024-06-14 13:22:33,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 452 transitions, 6429 flow [2024-06-14 13:22:33,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:22:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:22:33,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-14 13:22:33,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-14 13:22:33,748 INFO L175 Difference]: Start difference. First operand has 341 places, 407 transitions, 5392 flow. Second operand 10 states and 184 transitions. [2024-06-14 13:22:33,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 452 transitions, 6429 flow [2024-06-14 13:22:36,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 452 transitions, 6293 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:22:36,905 INFO L231 Difference]: Finished difference. Result has 344 places, 407 transitions, 5380 flow [2024-06-14 13:22:36,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5256, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5380, PETRI_PLACES=344, PETRI_TRANSITIONS=407} [2024-06-14 13:22:36,905 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 299 predicate places. [2024-06-14 13:22:36,905 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 407 transitions, 5380 flow [2024-06-14 13:22:36,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:36,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:36,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:36,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:22:36,906 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)] === [2024-06-14 13:22:36,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:36,906 INFO L85 PathProgramCache]: Analyzing trace with hash -119386965, now seen corresponding path program 1 times [2024-06-14 13:22:36,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:36,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264551409] [2024-06-14 13:22:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:36,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:40,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:40,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264551409] [2024-06-14 13:22:40,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264551409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:40,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:40,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:40,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152002622] [2024-06-14 13:22:40,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:40,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:40,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:40,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:40,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:40,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:22:40,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 407 transitions, 5380 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:40,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:40,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:22:40,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:42,896 INFO L124 PetriNetUnfolderBase]: 5015/8018 cut-off events. [2024-06-14 13:22:42,896 INFO L125 PetriNetUnfolderBase]: For 1273313/1273313 co-relation queries the response was YES. [2024-06-14 13:22:42,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60266 conditions, 8018 events. 5015/8018 cut-off events. For 1273313/1273313 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 51259 event pairs, 1130 based on Foata normal form. 2/8012 useless extension candidates. Maximal degree in co-relation 60098. Up to 6792 conditions per place. [2024-06-14 13:22:42,996 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 286 selfloop transitions, 152 changer transitions 0/443 dead transitions. [2024-06-14 13:22:42,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 443 transitions, 6676 flow [2024-06-14 13:22:42,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:22:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:22:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 13:22:42,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 13:22:42,998 INFO L175 Difference]: Start difference. First operand has 344 places, 407 transitions, 5380 flow. Second operand 8 states and 153 transitions. [2024-06-14 13:22:42,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 443 transitions, 6676 flow [2024-06-14 13:22:46,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 443 transitions, 6567 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:22:46,110 INFO L231 Difference]: Finished difference. Result has 346 places, 413 transitions, 5801 flow [2024-06-14 13:22:46,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5271, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5801, PETRI_PLACES=346, PETRI_TRANSITIONS=413} [2024-06-14 13:22:46,110 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 301 predicate places. [2024-06-14 13:22:46,110 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 413 transitions, 5801 flow [2024-06-14 13:22:46,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:46,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:46,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:46,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:22:46,111 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)] === [2024-06-14 13:22:46,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:46,111 INFO L85 PathProgramCache]: Analyzing trace with hash 919217603, now seen corresponding path program 3 times [2024-06-14 13:22:46,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:46,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702028686] [2024-06-14 13:22:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:46,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:49,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:49,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702028686] [2024-06-14 13:22:49,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702028686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:49,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:49,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:22:49,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6888937] [2024-06-14 13:22:49,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:49,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:22:49,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:22:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:22:49,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:22:49,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 413 transitions, 5801 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:49,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:49,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:22:49,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:22:52,372 INFO L124 PetriNetUnfolderBase]: 5105/8163 cut-off events. [2024-06-14 13:22:52,372 INFO L125 PetriNetUnfolderBase]: For 1362311/1362311 co-relation queries the response was YES. [2024-06-14 13:22:52,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63476 conditions, 8163 events. 5105/8163 cut-off events. For 1362311/1362311 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 52324 event pairs, 1192 based on Foata normal form. 2/8163 useless extension candidates. Maximal degree in co-relation 63306. Up to 6304 conditions per place. [2024-06-14 13:22:52,496 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 263 selfloop transitions, 204 changer transitions 0/472 dead transitions. [2024-06-14 13:22:52,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 472 transitions, 7761 flow [2024-06-14 13:22:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:22:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:22:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 13:22:52,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-14 13:22:52,497 INFO L175 Difference]: Start difference. First operand has 346 places, 413 transitions, 5801 flow. Second operand 9 states and 183 transitions. [2024-06-14 13:22:52,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 472 transitions, 7761 flow [2024-06-14 13:22:55,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 472 transitions, 7498 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:22:55,641 INFO L231 Difference]: Finished difference. Result has 349 places, 426 transitions, 6193 flow [2024-06-14 13:22:55,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6193, PETRI_PLACES=349, PETRI_TRANSITIONS=426} [2024-06-14 13:22:55,642 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-14 13:22:55,642 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 426 transitions, 6193 flow [2024-06-14 13:22:55,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:55,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:22:55,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:22:55,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:22:55,642 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)] === [2024-06-14 13:22:55,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:22:55,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2045630285, now seen corresponding path program 4 times [2024-06-14 13:22:55,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:22:55,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494563150] [2024-06-14 13:22:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:22:55,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:22:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:22:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:22:58,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:22:58,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494563150] [2024-06-14 13:22:58,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494563150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:22:58,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:22:58,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:22:58,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242778952] [2024-06-14 13:22:58,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:22:58,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:22:58,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:22:58,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:22:58,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:22:58,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:22:58,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 426 transitions, 6193 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:22:58,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:22:58,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:22:58,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:01,607 INFO L124 PetriNetUnfolderBase]: 5307/8471 cut-off events. [2024-06-14 13:23:01,607 INFO L125 PetriNetUnfolderBase]: For 1511257/1511261 co-relation queries the response was YES. [2024-06-14 13:23:01,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68382 conditions, 8471 events. 5307/8471 cut-off events. For 1511257/1511261 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 54481 event pairs, 1179 based on Foata normal form. 6/8475 useless extension candidates. Maximal degree in co-relation 68212. Up to 6442 conditions per place. [2024-06-14 13:23:01,740 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 253 selfloop transitions, 229 changer transitions 0/487 dead transitions. [2024-06-14 13:23:01,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 487 transitions, 8524 flow [2024-06-14 13:23:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 13:23:01,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-14 13:23:01,742 INFO L175 Difference]: Start difference. First operand has 349 places, 426 transitions, 6193 flow. Second operand 8 states and 166 transitions. [2024-06-14 13:23:01,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 487 transitions, 8524 flow [2024-06-14 13:23:05,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 487 transitions, 7976 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:05,539 INFO L231 Difference]: Finished difference. Result has 351 places, 445 transitions, 6485 flow [2024-06-14 13:23:05,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5683, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6485, PETRI_PLACES=351, PETRI_TRANSITIONS=445} [2024-06-14 13:23:05,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 306 predicate places. [2024-06-14 13:23:05,540 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 445 transitions, 6485 flow [2024-06-14 13:23:05,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:05,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:05,540 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, 1, 1] [2024-06-14 13:23:05,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:23:05,540 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)] === [2024-06-14 13:23:05,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1839241151, now seen corresponding path program 2 times [2024-06-14 13:23:05,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:05,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046759979] [2024-06-14 13:23:05,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:05,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:08,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:08,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046759979] [2024-06-14 13:23:08,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046759979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:08,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:08,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:08,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314084228] [2024-06-14 13:23:08,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:08,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:08,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:08,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:08,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:08,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:23:08,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 445 transitions, 6485 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:08,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:08,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:23:08,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:11,424 INFO L124 PetriNetUnfolderBase]: 5317/8459 cut-off events. [2024-06-14 13:23:11,424 INFO L125 PetriNetUnfolderBase]: For 1537986/1537986 co-relation queries the response was YES. [2024-06-14 13:23:11,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68550 conditions, 8459 events. 5317/8459 cut-off events. For 1537986/1537986 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 54206 event pairs, 1498 based on Foata normal form. 2/8446 useless extension candidates. Maximal degree in co-relation 68379. Up to 6448 conditions per place. [2024-06-14 13:23:11,546 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 272 selfloop transitions, 200 changer transitions 0/477 dead transitions. [2024-06-14 13:23:11,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 477 transitions, 8031 flow [2024-06-14 13:23:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:11,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:23:11,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 13:23:11,547 INFO L175 Difference]: Start difference. First operand has 351 places, 445 transitions, 6485 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:23:11,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 477 transitions, 8031 flow [2024-06-14 13:23:15,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 477 transitions, 7667 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-14 13:23:15,627 INFO L231 Difference]: Finished difference. Result has 356 places, 448 transitions, 6603 flow [2024-06-14 13:23:15,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6125, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6603, PETRI_PLACES=356, PETRI_TRANSITIONS=448} [2024-06-14 13:23:15,627 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 311 predicate places. [2024-06-14 13:23:15,627 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 448 transitions, 6603 flow [2024-06-14 13:23:15,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:15,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:15,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:15,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:23:15,627 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)] === [2024-06-14 13:23:15,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:15,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2063169029, now seen corresponding path program 5 times [2024-06-14 13:23:15,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:15,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573189619] [2024-06-14 13:23:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:15,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:18,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:18,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573189619] [2024-06-14 13:23:18,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573189619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:18,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:18,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:18,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188426546] [2024-06-14 13:23:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:18,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:18,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:18,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:23:18,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 448 transitions, 6603 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:18,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:18,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:23:18,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:21,981 INFO L124 PetriNetUnfolderBase]: 5327/8493 cut-off events. [2024-06-14 13:23:21,981 INFO L125 PetriNetUnfolderBase]: For 1566745/1566745 co-relation queries the response was YES. [2024-06-14 13:23:22,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68615 conditions, 8493 events. 5327/8493 cut-off events. For 1566745/1566745 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 54506 event pairs, 1224 based on Foata normal form. 2/8493 useless extension candidates. Maximal degree in co-relation 68443. Up to 6454 conditions per place. [2024-06-14 13:23:22,102 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 257 selfloop transitions, 228 changer transitions 0/490 dead transitions. [2024-06-14 13:23:22,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 490 transitions, 8179 flow [2024-06-14 13:23:22,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:22,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 13:23:22,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 13:23:22,104 INFO L175 Difference]: Start difference. First operand has 356 places, 448 transitions, 6603 flow. Second operand 9 states and 174 transitions. [2024-06-14 13:23:22,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 490 transitions, 8179 flow [2024-06-14 13:23:25,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 490 transitions, 7701 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:25,569 INFO L231 Difference]: Finished difference. Result has 359 places, 451 transitions, 6632 flow [2024-06-14 13:23:25,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6632, PETRI_PLACES=359, PETRI_TRANSITIONS=451} [2024-06-14 13:23:25,569 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-14 13:23:25,569 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 451 transitions, 6632 flow [2024-06-14 13:23:25,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:25,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:25,569 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, 1, 1] [2024-06-14 13:23:25,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:23:25,569 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)] === [2024-06-14 13:23:25,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:25,570 INFO L85 PathProgramCache]: Analyzing trace with hash -432645939, now seen corresponding path program 6 times [2024-06-14 13:23:25,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:25,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660609050] [2024-06-14 13:23:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:25,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:28,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:28,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660609050] [2024-06-14 13:23:28,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660609050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:28,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:28,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:23:28,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991769040] [2024-06-14 13:23:28,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:28,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:23:28,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:28,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:23:28,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:23:28,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:23:28,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 451 transitions, 6632 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:28,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:28,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:23:28,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:31,510 INFO L124 PetriNetUnfolderBase]: 5353/8533 cut-off events. [2024-06-14 13:23:31,510 INFO L125 PetriNetUnfolderBase]: For 1606596/1606600 co-relation queries the response was YES. [2024-06-14 13:23:31,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69133 conditions, 8533 events. 5353/8533 cut-off events. For 1606596/1606600 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 54815 event pairs, 1200 based on Foata normal form. 6/8537 useless extension candidates. Maximal degree in co-relation 68961. Up to 6469 conditions per place. [2024-06-14 13:23:31,627 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 250 selfloop transitions, 239 changer transitions 0/494 dead transitions. [2024-06-14 13:23:31,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 494 transitions, 8717 flow [2024-06-14 13:23:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:23:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:23:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 13:23:31,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 13:23:31,628 INFO L175 Difference]: Start difference. First operand has 359 places, 451 transitions, 6632 flow. Second operand 8 states and 160 transitions. [2024-06-14 13:23:31,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 494 transitions, 8717 flow [2024-06-14 13:23:35,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 494 transitions, 8397 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:23:35,303 INFO L231 Difference]: Finished difference. Result has 361 places, 457 transitions, 6906 flow [2024-06-14 13:23:35,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6318, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6906, PETRI_PLACES=361, PETRI_TRANSITIONS=457} [2024-06-14 13:23:35,304 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-14 13:23:35,304 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 457 transitions, 6906 flow [2024-06-14 13:23:35,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:35,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:35,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:35,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:23:35,305 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)] === [2024-06-14 13:23:35,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:35,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1127393551, now seen corresponding path program 7 times [2024-06-14 13:23:35,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:35,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592085164] [2024-06-14 13:23:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:35,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:38,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:38,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592085164] [2024-06-14 13:23:38,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592085164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:38,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:38,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:38,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528406822] [2024-06-14 13:23:38,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:38,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:38,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:38,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:38,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:38,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:23:38,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 457 transitions, 6906 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:38,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:38,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:23:38,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:42,074 INFO L124 PetriNetUnfolderBase]: 5347/8529 cut-off events. [2024-06-14 13:23:42,075 INFO L125 PetriNetUnfolderBase]: For 1626768/1626768 co-relation queries the response was YES. [2024-06-14 13:23:42,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69266 conditions, 8529 events. 5347/8529 cut-off events. For 1626768/1626768 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 54810 event pairs, 1228 based on Foata normal form. 2/8529 useless extension candidates. Maximal degree in co-relation 69093. Up to 6466 conditions per place. [2024-06-14 13:23:42,200 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 252 selfloop transitions, 234 changer transitions 0/491 dead transitions. [2024-06-14 13:23:42,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 491 transitions, 8429 flow [2024-06-14 13:23:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:23:42,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-14 13:23:42,201 INFO L175 Difference]: Start difference. First operand has 361 places, 457 transitions, 6906 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:23:42,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 491 transitions, 8429 flow [2024-06-14 13:23:45,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 491 transitions, 8031 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 13:23:45,900 INFO L231 Difference]: Finished difference. Result has 366 places, 457 transitions, 6982 flow [2024-06-14 13:23:45,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6508, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6982, PETRI_PLACES=366, PETRI_TRANSITIONS=457} [2024-06-14 13:23:45,900 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 321 predicate places. [2024-06-14 13:23:45,901 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 457 transitions, 6982 flow [2024-06-14 13:23:45,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:45,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:45,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:45,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:23:45,901 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)] === [2024-06-14 13:23:45,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:45,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1127186161, now seen corresponding path program 8 times [2024-06-14 13:23:45,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:45,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431520797] [2024-06-14 13:23:45,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:45,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:23:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:23:49,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:23:49,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431520797] [2024-06-14 13:23:49,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431520797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:23:49,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:23:49,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:23:49,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689752687] [2024-06-14 13:23:49,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:23:49,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:23:49,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:23:49,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:23:49,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:23:49,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:23:49,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 457 transitions, 6982 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:49,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:23:49,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:23:49,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:23:52,451 INFO L124 PetriNetUnfolderBase]: 5357/8547 cut-off events. [2024-06-14 13:23:52,451 INFO L125 PetriNetUnfolderBase]: For 1658073/1658073 co-relation queries the response was YES. [2024-06-14 13:23:52,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69643 conditions, 8547 events. 5357/8547 cut-off events. For 1658073/1658073 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 55044 event pairs, 1226 based on Foata normal form. 2/8547 useless extension candidates. Maximal degree in co-relation 69469. Up to 6472 conditions per place. [2024-06-14 13:23:52,565 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 253 selfloop transitions, 237 changer transitions 0/495 dead transitions. [2024-06-14 13:23:52,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 495 transitions, 8572 flow [2024-06-14 13:23:52,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:23:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:23:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 13:23:52,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-14 13:23:52,566 INFO L175 Difference]: Start difference. First operand has 366 places, 457 transitions, 6982 flow. Second operand 9 states and 170 transitions. [2024-06-14 13:23:52,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 495 transitions, 8572 flow [2024-06-14 13:23:56,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 495 transitions, 7911 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 13:23:56,725 INFO L231 Difference]: Finished difference. Result has 367 places, 460 transitions, 6854 flow [2024-06-14 13:23:56,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6854, PETRI_PLACES=367, PETRI_TRANSITIONS=460} [2024-06-14 13:23:56,726 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 322 predicate places. [2024-06-14 13:23:56,726 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 460 transitions, 6854 flow [2024-06-14 13:23:56,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:23:56,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:23:56,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:23:56,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:23:56,727 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)] === [2024-06-14 13:23:56,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:23:56,727 INFO L85 PathProgramCache]: Analyzing trace with hash -187509911, now seen corresponding path program 3 times [2024-06-14 13:23:56,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:23:56,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472481048] [2024-06-14 13:23:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:23:56,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:23:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:00,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:00,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472481048] [2024-06-14 13:24:00,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472481048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:00,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:00,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:00,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023788462] [2024-06-14 13:24:00,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:00,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:00,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:00,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:00,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:00,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:24:00,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 460 transitions, 6854 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:00,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:00,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:24:00,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:03,150 INFO L124 PetriNetUnfolderBase]: 5367/8529 cut-off events. [2024-06-14 13:24:03,150 INFO L125 PetriNetUnfolderBase]: For 1682611/1682611 co-relation queries the response was YES. [2024-06-14 13:24:03,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69808 conditions, 8529 events. 5367/8529 cut-off events. For 1682611/1682611 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 54692 event pairs, 1511 based on Foata normal form. 2/8516 useless extension candidates. Maximal degree in co-relation 69633. Up to 6478 conditions per place. [2024-06-14 13:24:03,273 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 270 selfloop transitions, 215 changer transitions 0/490 dead transitions. [2024-06-14 13:24:03,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 490 transitions, 8657 flow [2024-06-14 13:24:03,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:24:03,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-14 13:24:03,274 INFO L175 Difference]: Start difference. First operand has 367 places, 460 transitions, 6854 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:24:03,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 490 transitions, 8657 flow [2024-06-14 13:24:07,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 490 transitions, 8316 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:24:07,703 INFO L231 Difference]: Finished difference. Result has 369 places, 463 transitions, 7019 flow [2024-06-14 13:24:07,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6517, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7019, PETRI_PLACES=369, PETRI_TRANSITIONS=463} [2024-06-14 13:24:07,703 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 324 predicate places. [2024-06-14 13:24:07,703 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 463 transitions, 7019 flow [2024-06-14 13:24:07,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:07,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:07,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:07,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:24:07,704 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)] === [2024-06-14 13:24:07,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash -496940381, now seen corresponding path program 4 times [2024-06-14 13:24:07,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:07,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686841998] [2024-06-14 13:24:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:07,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:10,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:10,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686841998] [2024-06-14 13:24:10,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686841998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:10,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:10,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:10,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834071298] [2024-06-14 13:24:10,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:10,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:10,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:10,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:10,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:24:10,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 463 transitions, 7019 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:10,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:10,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:24:10,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:14,021 INFO L124 PetriNetUnfolderBase]: 5361/8529 cut-off events. [2024-06-14 13:24:14,022 INFO L125 PetriNetUnfolderBase]: For 1701481/1701481 co-relation queries the response was YES. [2024-06-14 13:24:14,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69777 conditions, 8529 events. 5361/8529 cut-off events. For 1701481/1701481 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 54766 event pairs, 1514 based on Foata normal form. 2/8516 useless extension candidates. Maximal degree in co-relation 69601. Up to 6475 conditions per place. [2024-06-14 13:24:14,152 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 274 selfloop transitions, 210 changer transitions 0/489 dead transitions. [2024-06-14 13:24:14,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 489 transitions, 8524 flow [2024-06-14 13:24:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:24:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:24:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:24:14,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-06-14 13:24:14,153 INFO L175 Difference]: Start difference. First operand has 369 places, 463 transitions, 7019 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:24:14,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 489 transitions, 8524 flow [2024-06-14 13:24:18,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 489 transitions, 7924 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 13:24:19,000 INFO L231 Difference]: Finished difference. Result has 370 places, 463 transitions, 6847 flow [2024-06-14 13:24:19,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6419, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6847, PETRI_PLACES=370, PETRI_TRANSITIONS=463} [2024-06-14 13:24:19,000 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 325 predicate places. [2024-06-14 13:24:19,000 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 463 transitions, 6847 flow [2024-06-14 13:24:19,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:19,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:19,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:19,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:24:19,000 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)] === [2024-06-14 13:24:19,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:19,001 INFO L85 PathProgramCache]: Analyzing trace with hash 905874123, now seen corresponding path program 5 times [2024-06-14 13:24:19,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:19,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602449916] [2024-06-14 13:24:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:19,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:22,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:22,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602449916] [2024-06-14 13:24:22,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602449916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:22,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:22,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:22,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295394336] [2024-06-14 13:24:22,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:22,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:22,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:22,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:22,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:22,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:24:22,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 463 transitions, 6847 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:22,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:22,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:24:22,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:25,332 INFO L124 PetriNetUnfolderBase]: 5371/8540 cut-off events. [2024-06-14 13:24:25,332 INFO L125 PetriNetUnfolderBase]: For 1728862/1728862 co-relation queries the response was YES. [2024-06-14 13:24:25,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69923 conditions, 8540 events. 5371/8540 cut-off events. For 1728862/1728862 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 54719 event pairs, 1430 based on Foata normal form. 2/8534 useless extension candidates. Maximal degree in co-relation 69746. Up to 7582 conditions per place. [2024-06-14 13:24:25,453 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 382 selfloop transitions, 104 changer transitions 0/491 dead transitions. [2024-06-14 13:24:25,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 491 transitions, 8414 flow [2024-06-14 13:24:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:24:25,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:24:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 13:24:25,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-14 13:24:25,454 INFO L175 Difference]: Start difference. First operand has 370 places, 463 transitions, 6847 flow. Second operand 10 states and 168 transitions. [2024-06-14 13:24:25,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 491 transitions, 8414 flow [2024-06-14 13:24:29,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 491 transitions, 7965 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:24:29,094 INFO L231 Difference]: Finished difference. Result has 373 places, 466 transitions, 6681 flow [2024-06-14 13:24:29,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6404, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6681, PETRI_PLACES=373, PETRI_TRANSITIONS=466} [2024-06-14 13:24:29,095 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 328 predicate places. [2024-06-14 13:24:29,095 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 466 transitions, 6681 flow [2024-06-14 13:24:29,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:29,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:29,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:29,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:24:29,095 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)] === [2024-06-14 13:24:29,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:29,095 INFO L85 PathProgramCache]: Analyzing trace with hash 667041167, now seen corresponding path program 6 times [2024-06-14 13:24:29,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:29,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594942293] [2024-06-14 13:24:29,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:29,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:32,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:32,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594942293] [2024-06-14 13:24:32,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594942293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:32,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:32,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:32,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968726390] [2024-06-14 13:24:32,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:32,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:32,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:32,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:32,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:32,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:24:32,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 466 transitions, 6681 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:32,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:32,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:24:32,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:34,967 INFO L124 PetriNetUnfolderBase]: 5381/8554 cut-off events. [2024-06-14 13:24:34,967 INFO L125 PetriNetUnfolderBase]: For 1754793/1754793 co-relation queries the response was YES. [2024-06-14 13:24:35,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69708 conditions, 8554 events. 5381/8554 cut-off events. For 1754793/1754793 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 54865 event pairs, 1450 based on Foata normal form. 2/8548 useless extension candidates. Maximal degree in co-relation 69530. Up to 7588 conditions per place. [2024-06-14 13:24:35,085 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 385 selfloop transitions, 101 changer transitions 0/491 dead transitions. [2024-06-14 13:24:35,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 491 transitions, 8246 flow [2024-06-14 13:24:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:24:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:24:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:24:35,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:24:35,086 INFO L175 Difference]: Start difference. First operand has 373 places, 466 transitions, 6681 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:24:35,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 491 transitions, 8246 flow [2024-06-14 13:24:39,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 491 transitions, 7986 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 13:24:39,725 INFO L231 Difference]: Finished difference. Result has 374 places, 469 transitions, 6696 flow [2024-06-14 13:24:39,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6425, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6696, PETRI_PLACES=374, PETRI_TRANSITIONS=469} [2024-06-14 13:24:39,726 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-14 13:24:39,726 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 469 transitions, 6696 flow [2024-06-14 13:24:39,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:39,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:39,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:39,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:24:39,726 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)] === [2024-06-14 13:24:39,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:39,726 INFO L85 PathProgramCache]: Analyzing trace with hash 666862421, now seen corresponding path program 9 times [2024-06-14 13:24:39,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:39,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611850040] [2024-06-14 13:24:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:39,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:42,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:42,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611850040] [2024-06-14 13:24:42,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611850040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:42,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:42,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:42,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962674363] [2024-06-14 13:24:42,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:42,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:42,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:42,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:42,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:42,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:24:42,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 469 transitions, 6696 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:42,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:42,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:24:42,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:45,653 INFO L124 PetriNetUnfolderBase]: 5375/8569 cut-off events. [2024-06-14 13:24:45,653 INFO L125 PetriNetUnfolderBase]: For 1765884/1765884 co-relation queries the response was YES. [2024-06-14 13:24:45,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69619 conditions, 8569 events. 5375/8569 cut-off events. For 1765884/1765884 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 55225 event pairs, 1529 based on Foata normal form. 2/8570 useless extension candidates. Maximal degree in co-relation 69440. Up to 8108 conditions per place. [2024-06-14 13:24:45,768 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 442 selfloop transitions, 48 changer transitions 0/495 dead transitions. [2024-06-14 13:24:45,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 495 transitions, 7988 flow [2024-06-14 13:24:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:24:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:24:45,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:24:45,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 13:24:45,769 INFO L175 Difference]: Start difference. First operand has 374 places, 469 transitions, 6696 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:24:45,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 495 transitions, 7988 flow [2024-06-14 13:24:50,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 495 transitions, 7705 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 13:24:50,416 INFO L231 Difference]: Finished difference. Result has 375 places, 469 transitions, 6515 flow [2024-06-14 13:24:50,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6413, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6515, PETRI_PLACES=375, PETRI_TRANSITIONS=469} [2024-06-14 13:24:50,416 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 330 predicate places. [2024-06-14 13:24:50,416 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 469 transitions, 6515 flow [2024-06-14 13:24:50,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:50,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:50,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:50,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:24:50,417 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)] === [2024-06-14 13:24:50,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:50,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1892863093, now seen corresponding path program 7 times [2024-06-14 13:24:50,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:50,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348610392] [2024-06-14 13:24:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:50,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:24:53,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:53,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348610392] [2024-06-14 13:24:53,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348610392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:53,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:53,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:24:53,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429789703] [2024-06-14 13:24:53,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:53,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:24:53,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:53,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:24:53,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:24:53,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:24:53,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 469 transitions, 6515 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:53,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:53,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:24:53,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:56,639 INFO L124 PetriNetUnfolderBase]: 5369/8550 cut-off events. [2024-06-14 13:24:56,640 INFO L125 PetriNetUnfolderBase]: For 1778148/1778148 co-relation queries the response was YES. [2024-06-14 13:24:56,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69083 conditions, 8550 events. 5369/8550 cut-off events. For 1778148/1778148 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 54913 event pairs, 1432 based on Foata normal form. 2/8544 useless extension candidates. Maximal degree in co-relation 68904. Up to 7582 conditions per place. [2024-06-14 13:24:56,752 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 385 selfloop transitions, 100 changer transitions 0/490 dead transitions. [2024-06-14 13:24:56,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 490 transitions, 7779 flow [2024-06-14 13:24:56,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:24:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:24:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:24:56,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3838383838383838 [2024-06-14 13:24:56,753 INFO L175 Difference]: Start difference. First operand has 375 places, 469 transitions, 6515 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:24:56,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 490 transitions, 7779 flow [2024-06-14 13:25:01,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 490 transitions, 7641 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 13:25:01,073 INFO L231 Difference]: Finished difference. Result has 377 places, 469 transitions, 6585 flow [2024-06-14 13:25:01,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6377, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6585, PETRI_PLACES=377, PETRI_TRANSITIONS=469} [2024-06-14 13:25:01,073 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 332 predicate places. [2024-06-14 13:25:01,073 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 469 transitions, 6585 flow [2024-06-14 13:25:01,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:01,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:01,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:01,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:25:01,074 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)] === [2024-06-14 13:25:01,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:01,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1315675825, now seen corresponding path program 10 times [2024-06-14 13:25:01,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:01,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906981504] [2024-06-14 13:25:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:01,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:04,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:04,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906981504] [2024-06-14 13:25:04,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906981504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:04,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:04,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:04,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339762737] [2024-06-14 13:25:04,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:04,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:04,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:04,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:04,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:04,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:25:04,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 469 transitions, 6585 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:04,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:04,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:25:04,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:07,565 INFO L124 PetriNetUnfolderBase]: 5363/8551 cut-off events. [2024-06-14 13:25:07,566 INFO L125 PetriNetUnfolderBase]: For 1792727/1792727 co-relation queries the response was YES. [2024-06-14 13:25:07,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69310 conditions, 8551 events. 5363/8551 cut-off events. For 1792727/1792727 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 55088 event pairs, 1485 based on Foata normal form. 2/8552 useless extension candidates. Maximal degree in co-relation 69130. Up to 8095 conditions per place. [2024-06-14 13:25:07,678 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 442 selfloop transitions, 48 changer transitions 0/495 dead transitions. [2024-06-14 13:25:07,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 495 transitions, 7641 flow [2024-06-14 13:25:07,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:25:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:25:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 13:25:07,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:25:07,679 INFO L175 Difference]: Start difference. First operand has 377 places, 469 transitions, 6585 flow. Second operand 10 states and 165 transitions. [2024-06-14 13:25:07,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 495 transitions, 7641 flow [2024-06-14 13:25:12,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 495 transitions, 7378 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 13:25:12,312 INFO L231 Difference]: Finished difference. Result has 378 places, 469 transitions, 6424 flow [2024-06-14 13:25:12,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6322, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6424, PETRI_PLACES=378, PETRI_TRANSITIONS=469} [2024-06-14 13:25:12,312 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-14 13:25:12,312 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 469 transitions, 6424 flow [2024-06-14 13:25:12,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:12,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:12,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:12,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:25:12,313 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)] === [2024-06-14 13:25:12,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash -494944989, now seen corresponding path program 1 times [2024-06-14 13:25:12,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:12,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995173895] [2024-06-14 13:25:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:12,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:15,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:15,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995173895] [2024-06-14 13:25:15,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995173895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:15,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:15,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:15,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517466704] [2024-06-14 13:25:15,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:15,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:15,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:15,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:15,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:15,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:25:15,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 469 transitions, 6424 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:15,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:15,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:25:15,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:18,802 INFO L124 PetriNetUnfolderBase]: 5554/8858 cut-off events. [2024-06-14 13:25:18,802 INFO L125 PetriNetUnfolderBase]: For 2044022/2044026 co-relation queries the response was YES. [2024-06-14 13:25:18,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74763 conditions, 8858 events. 5554/8858 cut-off events. For 2044022/2044026 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 57243 event pairs, 1390 based on Foata normal form. 6/8862 useless extension candidates. Maximal degree in co-relation 74582. Up to 7550 conditions per place. [2024-06-14 13:25:18,921 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 376 selfloop transitions, 138 changer transitions 0/519 dead transitions. [2024-06-14 13:25:18,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 519 transitions, 7982 flow [2024-06-14 13:25:18,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:18,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 13:25:18,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-14 13:25:18,922 INFO L175 Difference]: Start difference. First operand has 378 places, 469 transitions, 6424 flow. Second operand 8 states and 161 transitions. [2024-06-14 13:25:18,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 519 transitions, 7982 flow [2024-06-14 13:25:24,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 519 transitions, 7879 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:25:24,704 INFO L231 Difference]: Finished difference. Result has 378 places, 477 transitions, 6789 flow [2024-06-14 13:25:24,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6321, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6789, PETRI_PLACES=378, PETRI_TRANSITIONS=477} [2024-06-14 13:25:24,704 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-14 13:25:24,704 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 477 transitions, 6789 flow [2024-06-14 13:25:24,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:24,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:24,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:24,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:25:24,705 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)] === [2024-06-14 13:25:24,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:24,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1546896343, now seen corresponding path program 2 times [2024-06-14 13:25:24,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:24,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521304899] [2024-06-14 13:25:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:24,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:28,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:28,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521304899] [2024-06-14 13:25:28,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521304899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:28,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:28,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:28,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928879602] [2024-06-14 13:25:28,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:28,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:28,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:28,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:28,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:28,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:25:28,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 477 transitions, 6789 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:28,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:28,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:25:28,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:32,000 INFO L124 PetriNetUnfolderBase]: 5549/8857 cut-off events. [2024-06-14 13:25:32,000 INFO L125 PetriNetUnfolderBase]: For 2067402/2067406 co-relation queries the response was YES. [2024-06-14 13:25:32,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75701 conditions, 8857 events. 5549/8857 cut-off events. For 2067402/2067406 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 57257 event pairs, 1404 based on Foata normal form. 6/8861 useless extension candidates. Maximal degree in co-relation 75518. Up to 7770 conditions per place. [2024-06-14 13:25:32,124 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 371 selfloop transitions, 133 changer transitions 0/509 dead transitions. [2024-06-14 13:25:32,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 509 transitions, 7893 flow [2024-06-14 13:25:32,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:32,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:25:32,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 13:25:32,125 INFO L175 Difference]: Start difference. First operand has 378 places, 477 transitions, 6789 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:25:32,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 509 transitions, 7893 flow [2024-06-14 13:25:37,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 509 transitions, 7607 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:25:37,244 INFO L231 Difference]: Finished difference. Result has 381 places, 477 transitions, 6774 flow [2024-06-14 13:25:37,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6503, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6774, PETRI_PLACES=381, PETRI_TRANSITIONS=477} [2024-06-14 13:25:37,244 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-14 13:25:37,244 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 477 transitions, 6774 flow [2024-06-14 13:25:37,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:37,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:37,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:37,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:25:37,244 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)] === [2024-06-14 13:25:37,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:37,245 INFO L85 PathProgramCache]: Analyzing trace with hash 518931149, now seen corresponding path program 3 times [2024-06-14 13:25:37,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:37,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030226768] [2024-06-14 13:25:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:37,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:40,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:40,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030226768] [2024-06-14 13:25:40,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030226768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:40,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:40,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:25:40,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588453224] [2024-06-14 13:25:40,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:40,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:25:40,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:40,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:25:40,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:25:40,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:25:40,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 477 transitions, 6774 flow. Second operand has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:40,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:40,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:25:40,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:44,219 INFO L124 PetriNetUnfolderBase]: 5557/8866 cut-off events. [2024-06-14 13:25:44,219 INFO L125 PetriNetUnfolderBase]: For 2099601/2099601 co-relation queries the response was YES. [2024-06-14 13:25:44,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75869 conditions, 8866 events. 5557/8866 cut-off events. For 2099601/2099601 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 57314 event pairs, 1409 based on Foata normal form. 2/8866 useless extension candidates. Maximal degree in co-relation 75685. Up to 7782 conditions per place. [2024-06-14 13:25:44,353 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 376 selfloop transitions, 130 changer transitions 0/511 dead transitions. [2024-06-14 13:25:44,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 511 transitions, 7923 flow [2024-06-14 13:25:44,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:25:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:25:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:25:44,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 13:25:44,354 INFO L175 Difference]: Start difference. First operand has 381 places, 477 transitions, 6774 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:25:44,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 511 transitions, 7923 flow [2024-06-14 13:25:50,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 511 transitions, 7674 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:25:50,295 INFO L231 Difference]: Finished difference. Result has 385 places, 479 transitions, 6835 flow [2024-06-14 13:25:50,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6525, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6835, PETRI_PLACES=385, PETRI_TRANSITIONS=479} [2024-06-14 13:25:50,296 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-14 13:25:50,296 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 479 transitions, 6835 flow [2024-06-14 13:25:50,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:50,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:50,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:50,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:25:50,296 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)] === [2024-06-14 13:25:50,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:50,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1892647953, now seen corresponding path program 4 times [2024-06-14 13:25:50,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:50,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582435998] [2024-06-14 13:25:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:50,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:53,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:53,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582435998] [2024-06-14 13:25:53,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582435998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:53,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:53,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:53,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754272978] [2024-06-14 13:25:53,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:53,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:53,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:53,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:25:53,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 479 transitions, 6835 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:25:53,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:53,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:25:53,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:56,906 INFO L124 PetriNetUnfolderBase]: 5601/8909 cut-off events. [2024-06-14 13:25:56,906 INFO L125 PetriNetUnfolderBase]: For 2211678/2211678 co-relation queries the response was YES. [2024-06-14 13:25:57,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76539 conditions, 8909 events. 5601/8909 cut-off events. For 2211678/2211678 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57461 event pairs, 1571 based on Foata normal form. 12/8920 useless extension candidates. Maximal degree in co-relation 76354. Up to 8422 conditions per place. [2024-06-14 13:25:57,052 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 459 selfloop transitions, 39 changer transitions 8/511 dead transitions. [2024-06-14 13:25:57,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 511 transitions, 8000 flow [2024-06-14 13:25:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:25:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:25:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:25:57,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-14 13:25:57,056 INFO L175 Difference]: Start difference. First operand has 385 places, 479 transitions, 6835 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:25:57,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 511 transitions, 8000 flow [2024-06-14 13:26:02,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 511 transitions, 7804 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:02,107 INFO L231 Difference]: Finished difference. Result has 388 places, 478 transitions, 6698 flow [2024-06-14 13:26:02,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6639, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6698, PETRI_PLACES=388, PETRI_TRANSITIONS=478} [2024-06-14 13:26:02,108 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-14 13:26:02,108 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 478 transitions, 6698 flow [2024-06-14 13:26:02,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:02,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:02,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:02,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:26:02,110 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)] === [2024-06-14 13:26:02,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:02,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1944301429, now seen corresponding path program 11 times [2024-06-14 13:26:02,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:02,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949782952] [2024-06-14 13:26:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:02,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:05,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:05,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949782952] [2024-06-14 13:26:05,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949782952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:05,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:05,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:05,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304234351] [2024-06-14 13:26:05,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:05,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:05,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:05,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:05,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:26:05,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 478 transitions, 6698 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:05,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:05,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:26:05,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:08,222 INFO L124 PetriNetUnfolderBase]: 5567/8860 cut-off events. [2024-06-14 13:26:08,222 INFO L125 PetriNetUnfolderBase]: For 2166758/2166766 co-relation queries the response was YES. [2024-06-14 13:26:08,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76167 conditions, 8860 events. 5567/8860 cut-off events. For 2166758/2166766 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57030 event pairs, 1276 based on Foata normal form. 10/8862 useless extension candidates. Maximal degree in co-relation 75981. Up to 6780 conditions per place. [2024-06-14 13:26:08,356 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 301 selfloop transitions, 211 changer transitions 0/517 dead transitions. [2024-06-14 13:26:08,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 517 transitions, 8391 flow [2024-06-14 13:26:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:26:08,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 13:26:08,358 INFO L175 Difference]: Start difference. First operand has 388 places, 478 transitions, 6698 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:26:08,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 517 transitions, 8391 flow [2024-06-14 13:26:14,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 517 transitions, 8296 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:14,741 INFO L231 Difference]: Finished difference. Result has 390 places, 481 transitions, 7089 flow [2024-06-14 13:26:14,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6603, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7089, PETRI_PLACES=390, PETRI_TRANSITIONS=481} [2024-06-14 13:26:14,741 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-14 13:26:14,741 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 481 transitions, 7089 flow [2024-06-14 13:26:14,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:14,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:14,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:14,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:26:14,742 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)] === [2024-06-14 13:26:14,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:14,742 INFO L85 PathProgramCache]: Analyzing trace with hash 116130763, now seen corresponding path program 12 times [2024-06-14 13:26:14,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:14,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295946509] [2024-06-14 13:26:14,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:14,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:17,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:17,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295946509] [2024-06-14 13:26:17,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295946509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:17,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:17,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:17,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425782955] [2024-06-14 13:26:17,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:17,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:17,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:17,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:17,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:17,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:26:17,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 481 transitions, 7089 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:17,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:17,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:26:17,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:20,899 INFO L124 PetriNetUnfolderBase]: 5577/8878 cut-off events. [2024-06-14 13:26:20,899 INFO L125 PetriNetUnfolderBase]: For 2207455/2207463 co-relation queries the response was YES. [2024-06-14 13:26:21,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77554 conditions, 8878 events. 5577/8878 cut-off events. For 2207455/2207463 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 57276 event pairs, 1276 based on Foata normal form. 10/8880 useless extension candidates. Maximal degree in co-relation 77367. Up to 6786 conditions per place. [2024-06-14 13:26:21,034 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 300 selfloop transitions, 211 changer transitions 0/516 dead transitions. [2024-06-14 13:26:21,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 516 transitions, 8780 flow [2024-06-14 13:26:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 13:26:21,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-14 13:26:21,036 INFO L175 Difference]: Start difference. First operand has 390 places, 481 transitions, 7089 flow. Second operand 8 states and 151 transitions. [2024-06-14 13:26:21,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 516 transitions, 8780 flow [2024-06-14 13:26:26,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 516 transitions, 8126 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-14 13:26:26,794 INFO L231 Difference]: Finished difference. Result has 391 places, 484 transitions, 6927 flow [2024-06-14 13:26:26,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6462, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6927, PETRI_PLACES=391, PETRI_TRANSITIONS=484} [2024-06-14 13:26:26,795 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-14 13:26:26,795 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 484 transitions, 6927 flow [2024-06-14 13:26:26,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:26,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:26,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:26,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:26:26,795 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)] === [2024-06-14 13:26:26,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:26,795 INFO L85 PathProgramCache]: Analyzing trace with hash 515628073, now seen corresponding path program 13 times [2024-06-14 13:26:26,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:26,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821656493] [2024-06-14 13:26:26,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:26,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:30,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:30,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821656493] [2024-06-14 13:26:30,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821656493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:30,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:30,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:30,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674529953] [2024-06-14 13:26:30,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:30,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:30,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:30,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:30,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:30,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-06-14 13:26:30,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 484 transitions, 6927 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:30,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:30,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-06-14 13:26:30,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:33,526 INFO L124 PetriNetUnfolderBase]: 5671/9008 cut-off events. [2024-06-14 13:26:33,526 INFO L125 PetriNetUnfolderBase]: For 2334570/2334578 co-relation queries the response was YES. [2024-06-14 13:26:33,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79252 conditions, 9008 events. 5671/9008 cut-off events. For 2334570/2334578 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 58074 event pairs, 1291 based on Foata normal form. 14/9014 useless extension candidates. Maximal degree in co-relation 79065. Up to 6856 conditions per place. [2024-06-14 13:26:33,673 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 302 selfloop transitions, 216 changer transitions 0/523 dead transitions. [2024-06-14 13:26:33,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 523 transitions, 8712 flow [2024-06-14 13:26:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 13:26:33,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 13:26:33,674 INFO L175 Difference]: Start difference. First operand has 391 places, 484 transitions, 6927 flow. Second operand 8 states and 150 transitions. [2024-06-14 13:26:33,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 523 transitions, 8712 flow [2024-06-14 13:26:39,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 523 transitions, 8295 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:39,867 INFO L231 Difference]: Finished difference. Result has 394 places, 494 transitions, 7109 flow [2024-06-14 13:26:39,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6526, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7109, PETRI_PLACES=394, PETRI_TRANSITIONS=494} [2024-06-14 13:26:39,867 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-14 13:26:39,867 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 494 transitions, 7109 flow [2024-06-14 13:26:39,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:39,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:39,868 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, 1, 1, 1] [2024-06-14 13:26:39,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:26:39,868 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)] === [2024-06-14 13:26:39,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:39,868 INFO L85 PathProgramCache]: Analyzing trace with hash 496636525, now seen corresponding path program 14 times [2024-06-14 13:26:39,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:39,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626070015] [2024-06-14 13:26:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:39,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Killed by 15