./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe027_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe027_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:31:34,094 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:31:34,131 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:31:34,134 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:31:34,135 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:31:34,149 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:31:34,149 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:31:34,149 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:31:34,150 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:31:34,150 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:31:34,150 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:31:34,151 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:31:34,151 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:31:34,151 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:31:34,152 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:31:34,152 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:31:34,152 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:31:34,153 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:31:34,153 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:31:34,153 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:31:34,153 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:31:34,154 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:31:34,154 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:31:34,154 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:31:34,155 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:31:34,155 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:31:34,155 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:31:34,156 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:31:34,156 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:31:34,156 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:31:34,156 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:31:34,157 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:31:34,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:31:34,157 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:31:34,157 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:31:34,158 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:31:34,158 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:31:34,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:31:34,158 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:31:34,159 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:31:34,159 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:31:34,159 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:31:34,159 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:31:34,160 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:31:34,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:31:34,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:31:34,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:31:34,330 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:31:34,332 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:31:34,333 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i [2024-06-27 21:31:35,328 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:31:35,506 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:31:35,507 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i [2024-06-27 21:31:35,519 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/126e90256/59ff1ab5eade476eb011fc55fc438899/FLAGa02a0702a [2024-06-27 21:31:35,530 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/126e90256/59ff1ab5eade476eb011fc55fc438899 [2024-06-27 21:31:35,532 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:31:35,532 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:31:35,532 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe027_power.opt.yml/witness.yml [2024-06-27 21:31:35,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:31:35,694 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:31:35,695 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:31:35,696 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:31:35,699 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:31:35,700 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:31:35" (1/2) ... [2024-06-27 21:31:35,701 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b5c4012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:31:35, skipping insertion in model container [2024-06-27 21:31:35,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:31:35" (1/2) ... [2024-06-27 21:31:35,702 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c9f149f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:31:35, skipping insertion in model container [2024-06-27 21:31:35,703 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:31:35" (2/2) ... [2024-06-27 21:31:35,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b5c4012 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:31:35, skipping insertion in model container [2024-06-27 21:31:35,703 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:31:35" (2/2) ... [2024-06-27 21:31:35,704 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:31:35,884 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:31:35,885 INFO L97 edCorrectnessWitness]: Location invariant before [L889-L889] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0) [2024-06-27 21:31:35,886 INFO L97 edCorrectnessWitness]: Location invariant before [L891-L891] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0) [2024-06-27 21:31:35,886 INFO L97 edCorrectnessWitness]: Location invariant before [L892-L892] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0) [2024-06-27 21:31:35,886 INFO L97 edCorrectnessWitness]: Location invariant before [L887-L887] (((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0) [2024-06-27 21:31:35,886 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:31:35,886 INFO L106 edCorrectnessWitness]: ghost_update [L885-L885] multithreaded = 1; [2024-06-27 21:31:35,909 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:31:36,218 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:31:36,229 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:31:36,355 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:31:36,382 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:31:36,382 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:31:36 WrapperNode [2024-06-27 21:31:36,382 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:31:36,383 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:31:36,383 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:31:36,383 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:31:36,388 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 27.06 09:31:36" (1/1) ... [2024-06-27 21:31:36,403 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 27.06 09:31:36" (1/1) ... [2024-06-27 21:31:36,434 INFO L138 Inliner]: procedures = 176, calls = 89, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 242 [2024-06-27 21:31:36,438 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:31:36,439 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:31:36,439 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:31:36,439 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:31:36,448 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:31:36" (1/1) ... [2024-06-27 21:31:36,449 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:31:36" (1/1) ... [2024-06-27 21:31:36,463 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:31:36" (1/1) ... [2024-06-27 21:31:36,483 INFO L175 MemorySlicer]: Split 42 memory accesses to 2 slices as follows [2, 40]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-27 21:31:36,494 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:31:36" (1/1) ... [2024-06-27 21:31:36,495 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:31:36" (1/1) ... [2024-06-27 21:31:36,510 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:31:36" (1/1) ... [2024-06-27 21:31:36,521 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:31:36" (1/1) ... [2024-06-27 21:31:36,523 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:31:36" (1/1) ... [2024-06-27 21:31:36,525 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:31:36" (1/1) ... [2024-06-27 21:31:36,544 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:31:36,545 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:31:36,545 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:31:36,545 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:31:36,552 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:31:36" (1/1) ... [2024-06-27 21:31:36,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:31:36,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:31:36,578 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) [2024-06-27 21:31:36,600 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 [2024-06-27 21:31:36,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:31:36,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:31:36,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:31:36,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:31:36,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:31:36,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:31:36,615 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:31:36,615 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:31:36,615 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:31:36,615 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:31:36,615 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:31:36,615 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:31:36,615 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 21:31:36,616 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 21:31:36,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:31:36,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:31:36,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:31:36,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:31:36,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:31:36,619 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:31:36,768 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:31:36,770 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:31:37,261 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:31:37,261 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:31:37,566 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:31:37,567 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:31:37,567 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:31:37 BoogieIcfgContainer [2024-06-27 21:31:37,567 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:31:37,569 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:31:37,570 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:31:37,572 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:31:37,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:31:35" (1/4) ... [2024-06-27 21:31:37,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c05c371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:31:37, skipping insertion in model container [2024-06-27 21:31:37,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:31:35" (2/4) ... [2024-06-27 21:31:37,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c05c371 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:31:37, skipping insertion in model container [2024-06-27 21:31:37,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:31:36" (3/4) ... [2024-06-27 21:31:37,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c05c371 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:31:37, skipping insertion in model container [2024-06-27 21:31:37,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:31:37" (4/4) ... [2024-06-27 21:31:37,574 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_power.opt.i [2024-06-27 21:31:37,588 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:31:37,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 21:31:37,588 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:31:37,656 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:31:37,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:31:37,721 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-27 21:31:37,722 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:31:37,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:31:37,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-27 21:31:37,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-27 21:31:37,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:31:37,744 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;@1349946d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:31:37,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 21:31:37,749 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:31:37,749 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 21:31:37,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:31:37,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:37,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:31:37,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:31:37,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:37,756 INFO L85 PathProgramCache]: Analyzing trace with hash 902672637, now seen corresponding path program 1 times [2024-06-27 21:31:37,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:37,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605673691] [2024-06-27 21:31:37,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:37,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:39,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:39,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605673691] [2024-06-27 21:31:39,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605673691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:39,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:39,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:31:39,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112272434] [2024-06-27 21:31:39,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:39,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:31:39,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:39,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:31:39,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:31:39,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-27 21:31:39,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:39,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:39,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-27 21:31:39,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:40,997 INFO L124 PetriNetUnfolderBase]: 5551/7794 cut-off events. [2024-06-27 21:31:40,997 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-06-27 21:31:41,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15714 conditions, 7794 events. 5551/7794 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 41505 event pairs, 3349 based on Foata normal form. 2/7671 useless extension candidates. Maximal degree in co-relation 15701. Up to 7623 conditions per place. [2024-06-27 21:31:41,043 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 47 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2024-06-27 21:31:41,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 245 flow [2024-06-27 21:31:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:31:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:31:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2024-06-27 21:31:41,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-27 21:31:41,053 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 92 transitions. [2024-06-27 21:31:41,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 245 flow [2024-06-27 21:31:41,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 238 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 21:31:41,058 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-27 21:31:41,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-27 21:31:41,061 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-27 21:31:41,062 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-27 21:31:41,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:41,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:41,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:41,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:31:41,063 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:31:41,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:41,063 INFO L85 PathProgramCache]: Analyzing trace with hash -725432043, now seen corresponding path program 1 times [2024-06-27 21:31:41,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:41,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835061320] [2024-06-27 21:31:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:41,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:43,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:43,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835061320] [2024-06-27 21:31:43,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835061320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:43,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:43,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:31:43,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210727848] [2024-06-27 21:31:43,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:43,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:31:43,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:43,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:31:43,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:31:43,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:31:43,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:43,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:43,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:31:43,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:45,512 INFO L124 PetriNetUnfolderBase]: 7050/9850 cut-off events. [2024-06-27 21:31:45,512 INFO L125 PetriNetUnfolderBase]: For 1780/1780 co-relation queries the response was YES. [2024-06-27 21:31:45,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22572 conditions, 9850 events. 7050/9850 cut-off events. For 1780/1780 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 51331 event pairs, 3276 based on Foata normal form. 8/9850 useless extension candidates. Maximal degree in co-relation 22560. Up to 9559 conditions per place. [2024-06-27 21:31:45,573 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 58 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2024-06-27 21:31:45,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 331 flow [2024-06-27 21:31:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:31:45,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:31:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-06-27 21:31:45,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-06-27 21:31:45,575 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 114 transitions. [2024-06-27 21:31:45,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 331 flow [2024-06-27 21:31:45,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:31:45,578 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 166 flow [2024-06-27 21:31:45,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-27 21:31:45,578 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2024-06-27 21:31:45,578 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 166 flow [2024-06-27 21:31:45,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:45,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:45,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:45,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:31:45,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:31:45,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash -555170923, now seen corresponding path program 1 times [2024-06-27 21:31:45,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:45,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935490259] [2024-06-27 21:31:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:45,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:46,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:46,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935490259] [2024-06-27 21:31:46,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935490259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:46,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:46,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:31:46,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187300121] [2024-06-27 21:31:46,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:46,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:31:46,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:46,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:31:46,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:31:47,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:31:47,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:47,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:47,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:31:47,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:48,754 INFO L124 PetriNetUnfolderBase]: 5553/7819 cut-off events. [2024-06-27 21:31:48,755 INFO L125 PetriNetUnfolderBase]: For 3944/3944 co-relation queries the response was YES. [2024-06-27 21:31:48,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19744 conditions, 7819 events. 5553/7819 cut-off events. For 3944/3944 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 41721 event pairs, 3002 based on Foata normal form. 6/7821 useless extension candidates. Maximal degree in co-relation 19729. Up to 7613 conditions per place. [2024-06-27 21:31:48,784 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 62 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-27 21:31:48,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 79 transitions, 404 flow [2024-06-27 21:31:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:31:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:31:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 21:31:48,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47307692307692306 [2024-06-27 21:31:48,786 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 166 flow. Second operand 5 states and 123 transitions. [2024-06-27 21:31:48,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 79 transitions, 404 flow [2024-06-27 21:31:48,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 79 transitions, 380 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 21:31:48,789 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 232 flow [2024-06-27 21:31:48,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-27 21:31:48,790 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 5 predicate places. [2024-06-27 21:31:48,790 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 232 flow [2024-06-27 21:31:48,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:48,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:48,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:48,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:31:48,790 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:31:48,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:48,791 INFO L85 PathProgramCache]: Analyzing trace with hash -30426949, now seen corresponding path program 1 times [2024-06-27 21:31:48,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:48,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469309255] [2024-06-27 21:31:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:48,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:50,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:50,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469309255] [2024-06-27 21:31:50,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469309255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:50,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:50,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:31:50,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960839859] [2024-06-27 21:31:50,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:50,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:31:50,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:50,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:31:50,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:31:50,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:31:50,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 232 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:50,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:50,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:31:50,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:52,377 INFO L124 PetriNetUnfolderBase]: 5571/7858 cut-off events. [2024-06-27 21:31:52,377 INFO L125 PetriNetUnfolderBase]: For 7919/7919 co-relation queries the response was YES. [2024-06-27 21:31:52,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22582 conditions, 7858 events. 5571/7858 cut-off events. For 7919/7919 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 41900 event pairs, 2892 based on Foata normal form. 6/7860 useless extension candidates. Maximal degree in co-relation 22564. Up to 7600 conditions per place. [2024-06-27 21:31:52,405 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 71 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2024-06-27 21:31:52,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 512 flow [2024-06-27 21:31:52,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:31:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:31:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 21:31:52,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-27 21:31:52,407 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 232 flow. Second operand 6 states and 148 transitions. [2024-06-27 21:31:52,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 512 flow [2024-06-27 21:31:52,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 492 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 21:31:52,411 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 292 flow [2024-06-27 21:31:52,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-27 21:31:52,412 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-27 21:31:52,412 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 292 flow [2024-06-27 21:31:52,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:52,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:52,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:52,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:31:52,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:31:52,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:52,413 INFO L85 PathProgramCache]: Analyzing trace with hash -943232908, now seen corresponding path program 1 times [2024-06-27 21:31:52,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:52,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390041802] [2024-06-27 21:31:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:52,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:54,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:54,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390041802] [2024-06-27 21:31:54,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390041802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:54,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:54,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:31:54,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343237682] [2024-06-27 21:31:54,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:54,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:31:54,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:54,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:31:54,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:31:54,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:31:54,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 292 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:54,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:54,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:31:54,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:56,504 INFO L124 PetriNetUnfolderBase]: 5556/7831 cut-off events. [2024-06-27 21:31:56,504 INFO L125 PetriNetUnfolderBase]: For 13101/13101 co-relation queries the response was YES. [2024-06-27 21:31:56,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25207 conditions, 7831 events. 5556/7831 cut-off events. For 13101/13101 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 41657 event pairs, 2767 based on Foata normal form. 6/7833 useless extension candidates. Maximal degree in co-relation 25187. Up to 7579 conditions per place. [2024-06-27 21:31:56,543 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 88 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-06-27 21:31:56,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 112 transitions, 680 flow [2024-06-27 21:31:56,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:31:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:31:56,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 21:31:56,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-27 21:31:56,548 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 292 flow. Second operand 7 states and 170 transitions. [2024-06-27 21:31:56,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 112 transitions, 680 flow [2024-06-27 21:31:56,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 112 transitions, 618 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 21:31:56,553 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 380 flow [2024-06-27 21:31:56,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2024-06-27 21:31:56,554 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2024-06-27 21:31:56,554 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 380 flow [2024-06-27 21:31:56,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:56,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:56,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:56,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:31:56,555 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:31:56,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:56,555 INFO L85 PathProgramCache]: Analyzing trace with hash 647055712, now seen corresponding path program 1 times [2024-06-27 21:31:56,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:56,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955111563] [2024-06-27 21:31:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:56,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:56,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:58,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:58,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955111563] [2024-06-27 21:31:58,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955111563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:58,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:58,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:31:58,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433710153] [2024-06-27 21:31:58,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:58,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:31:58,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:58,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:31:58,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:31:58,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:31:58,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 380 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:58,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:58,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:31:58,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:00,458 INFO L124 PetriNetUnfolderBase]: 7029/9839 cut-off events. [2024-06-27 21:32:00,459 INFO L125 PetriNetUnfolderBase]: For 22015/22015 co-relation queries the response was YES. [2024-06-27 21:32:00,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32896 conditions, 9839 events. 7029/9839 cut-off events. For 22015/22015 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 51222 event pairs, 3172 based on Foata normal form. 3/9834 useless extension candidates. Maximal degree in co-relation 32873. Up to 9499 conditions per place. [2024-06-27 21:32:00,504 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 73 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-06-27 21:32:00,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 660 flow [2024-06-27 21:32:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:32:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:32:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 21:32:00,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-27 21:32:00,506 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 380 flow. Second operand 5 states and 122 transitions. [2024-06-27 21:32:00,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 660 flow [2024-06-27 21:32:00,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 99 transitions, 629 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 21:32:00,515 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 452 flow [2024-06-27 21:32:00,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-06-27 21:32:00,516 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-27 21:32:00,516 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 452 flow [2024-06-27 21:32:00,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:00,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:00,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:00,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:32:00,517 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:00,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1109843322, now seen corresponding path program 1 times [2024-06-27 21:32:00,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:00,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682940137] [2024-06-27 21:32:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:00,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:02,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:02,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682940137] [2024-06-27 21:32:02,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682940137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:02,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:02,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:02,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101476415] [2024-06-27 21:32:02,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:02,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:02,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:02,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:02,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:02,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:32:02,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 452 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:02,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:02,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:32:02,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:05,040 INFO L124 PetriNetUnfolderBase]: 7056/9885 cut-off events. [2024-06-27 21:32:05,040 INFO L125 PetriNetUnfolderBase]: For 30514/30514 co-relation queries the response was YES. [2024-06-27 21:32:05,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35586 conditions, 9885 events. 7056/9885 cut-off events. For 30514/30514 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 51524 event pairs, 3062 based on Foata normal form. 3/9880 useless extension candidates. Maximal degree in co-relation 35561. Up to 9488 conditions per place. [2024-06-27 21:32:05,084 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 82 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-27 21:32:05,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 790 flow [2024-06-27 21:32:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:32:05,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:32:05,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 21:32:05,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-27 21:32:05,086 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 452 flow. Second operand 6 states and 147 transitions. [2024-06-27 21:32:05,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 790 flow [2024-06-27 21:32:05,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 113 transitions, 723 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 21:32:05,103 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 501 flow [2024-06-27 21:32:05,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=501, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-06-27 21:32:05,103 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-06-27 21:32:05,104 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 501 flow [2024-06-27 21:32:05,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:05,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:05,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:05,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:32:05,104 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:05,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:05,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1912555172, now seen corresponding path program 2 times [2024-06-27 21:32:05,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:05,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448377356] [2024-06-27 21:32:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:05,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:08,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:08,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448377356] [2024-06-27 21:32:08,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448377356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:08,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:08,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:08,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462693665] [2024-06-27 21:32:08,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:08,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:08,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:08,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:32:08,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 501 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:08,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:08,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:32:08,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:10,437 INFO L124 PetriNetUnfolderBase]: 7047/9900 cut-off events. [2024-06-27 21:32:10,437 INFO L125 PetriNetUnfolderBase]: For 31282/31290 co-relation queries the response was YES. [2024-06-27 21:32:10,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35639 conditions, 9900 events. 7047/9900 cut-off events. For 31282/31290 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 52222 event pairs, 3049 based on Foata normal form. 9/9904 useless extension candidates. Maximal degree in co-relation 35613. Up to 9484 conditions per place. [2024-06-27 21:32:10,483 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 103 selfloop transitions, 26 changer transitions 0/135 dead transitions. [2024-06-27 21:32:10,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 135 transitions, 929 flow [2024-06-27 21:32:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 21:32:10,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-27 21:32:10,486 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 501 flow. Second operand 8 states and 191 transitions. [2024-06-27 21:32:10,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 135 transitions, 929 flow [2024-06-27 21:32:10,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 135 transitions, 866 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 21:32:10,504 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 553 flow [2024-06-27 21:32:10,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=553, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2024-06-27 21:32:10,507 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-27 21:32:10,508 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 553 flow [2024-06-27 21:32:10,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:10,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:10,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:10,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:32:10,508 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:10,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:10,509 INFO L85 PathProgramCache]: Analyzing trace with hash -441709502, now seen corresponding path program 1 times [2024-06-27 21:32:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:10,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313897820] [2024-06-27 21:32:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:10,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:12,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:12,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313897820] [2024-06-27 21:32:12,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313897820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:12,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:12,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:32:12,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131832543] [2024-06-27 21:32:12,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:12,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:32:12,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:12,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:32:12,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:32:12,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:32:12,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 553 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 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) [2024-06-27 21:32:12,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:12,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:32:12,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:13,976 INFO L124 PetriNetUnfolderBase]: 5537/7806 cut-off events. [2024-06-27 21:32:13,976 INFO L125 PetriNetUnfolderBase]: For 34551/34551 co-relation queries the response was YES. [2024-06-27 21:32:13,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31052 conditions, 7806 events. 5537/7806 cut-off events. For 34551/34551 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 41522 event pairs, 2592 based on Foata normal form. 8/7807 useless extension candidates. Maximal degree in co-relation 31025. Up to 7549 conditions per place. [2024-06-27 21:32:14,015 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 87 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2024-06-27 21:32:14,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 107 transitions, 843 flow [2024-06-27 21:32:14,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:32:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:32:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 21:32:14,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 21:32:14,017 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 553 flow. Second operand 5 states and 120 transitions. [2024-06-27 21:32:14,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 107 transitions, 843 flow [2024-06-27 21:32:14,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 107 transitions, 746 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 21:32:14,028 INFO L231 Difference]: Finished difference. Result has 77 places, 87 transitions, 536 flow [2024-06-27 21:32:14,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=77, PETRI_TRANSITIONS=87} [2024-06-27 21:32:14,029 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-27 21:32:14,029 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 87 transitions, 536 flow [2024-06-27 21:32:14,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 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) [2024-06-27 21:32:14,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:14,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:14,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:32:14,030 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:14,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:14,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1277328233, now seen corresponding path program 1 times [2024-06-27 21:32:14,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:14,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776251499] [2024-06-27 21:32:14,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:14,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:15,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:15,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776251499] [2024-06-27 21:32:15,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776251499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:15,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:15,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:15,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005956254] [2024-06-27 21:32:15,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:15,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:15,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:15,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:15,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:16,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:32:16,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 87 transitions, 536 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:16,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:16,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:32:16,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:18,092 INFO L124 PetriNetUnfolderBase]: 7049/9889 cut-off events. [2024-06-27 21:32:18,092 INFO L125 PetriNetUnfolderBase]: For 49526/49526 co-relation queries the response was YES. [2024-06-27 21:32:18,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40233 conditions, 9889 events. 7049/9889 cut-off events. For 49526/49526 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 51771 event pairs, 2279 based on Foata normal form. 6/9887 useless extension candidates. Maximal degree in co-relation 40206. Up to 9518 conditions per place. [2024-06-27 21:32:18,148 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 103 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2024-06-27 21:32:18,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 892 flow [2024-06-27 21:32:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:32:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:32:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 21:32:18,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 21:32:18,152 INFO L175 Difference]: Start difference. First operand has 77 places, 87 transitions, 536 flow. Second operand 6 states and 143 transitions. [2024-06-27 21:32:18,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 892 flow [2024-06-27 21:32:18,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 848 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 21:32:18,176 INFO L231 Difference]: Finished difference. Result has 80 places, 90 transitions, 576 flow [2024-06-27 21:32:18,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=576, PETRI_PLACES=80, PETRI_TRANSITIONS=90} [2024-06-27 21:32:18,177 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-27 21:32:18,177 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 90 transitions, 576 flow [2024-06-27 21:32:18,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:18,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:18,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:18,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:32:18,178 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:18,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:18,178 INFO L85 PathProgramCache]: Analyzing trace with hash -48203573, now seen corresponding path program 2 times [2024-06-27 21:32:18,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:18,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511456104] [2024-06-27 21:32:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:18,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:20,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:20,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511456104] [2024-06-27 21:32:20,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511456104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:20,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:20,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:20,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141714552] [2024-06-27 21:32:20,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:20,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:20,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:20,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:20,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:20,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:32:20,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 90 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:20,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:20,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:32:20,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:22,341 INFO L124 PetriNetUnfolderBase]: 7034/9864 cut-off events. [2024-06-27 21:32:22,341 INFO L125 PetriNetUnfolderBase]: For 58813/58813 co-relation queries the response was YES. [2024-06-27 21:32:22,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41826 conditions, 9864 events. 7034/9864 cut-off events. For 58813/58813 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 51520 event pairs, 2785 based on Foata normal form. 6/9862 useless extension candidates. Maximal degree in co-relation 41798. Up to 9465 conditions per place. [2024-06-27 21:32:22,392 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 98 selfloop transitions, 23 changer transitions 0/127 dead transitions. [2024-06-27 21:32:22,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 127 transitions, 944 flow [2024-06-27 21:32:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:32:22,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:32:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 21:32:22,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46474358974358976 [2024-06-27 21:32:22,393 INFO L175 Difference]: Start difference. First operand has 80 places, 90 transitions, 576 flow. Second operand 6 states and 145 transitions. [2024-06-27 21:32:22,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 127 transitions, 944 flow [2024-06-27 21:32:22,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 127 transitions, 886 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 21:32:22,422 INFO L231 Difference]: Finished difference. Result has 82 places, 93 transitions, 625 flow [2024-06-27 21:32:22,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=625, PETRI_PLACES=82, PETRI_TRANSITIONS=93} [2024-06-27 21:32:22,423 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2024-06-27 21:32:22,423 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 93 transitions, 625 flow [2024-06-27 21:32:22,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:22,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:22,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:22,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:32:22,423 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:22,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:22,424 INFO L85 PathProgramCache]: Analyzing trace with hash -45402103, now seen corresponding path program 1 times [2024-06-27 21:32:22,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:22,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669520754] [2024-06-27 21:32:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:22,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:24,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:24,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669520754] [2024-06-27 21:32:24,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669520754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:24,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:24,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:24,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782969269] [2024-06-27 21:32:24,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:24,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:24,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:24,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:24,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:25,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:32:25,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 93 transitions, 625 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:25,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:25,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:32:25,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:27,408 INFO L124 PetriNetUnfolderBase]: 7190/10130 cut-off events. [2024-06-27 21:32:27,409 INFO L125 PetriNetUnfolderBase]: For 74102/74102 co-relation queries the response was YES. [2024-06-27 21:32:27,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44951 conditions, 10130 events. 7190/10130 cut-off events. For 74102/74102 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 53507 event pairs, 2496 based on Foata normal form. 24/10146 useless extension candidates. Maximal degree in co-relation 44922. Up to 9413 conditions per place. [2024-06-27 21:32:27,456 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 107 selfloop transitions, 30 changer transitions 0/143 dead transitions. [2024-06-27 21:32:27,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 143 transitions, 1073 flow [2024-06-27 21:32:27,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:32:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:32:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 21:32:27,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-27 21:32:27,458 INFO L175 Difference]: Start difference. First operand has 82 places, 93 transitions, 625 flow. Second operand 7 states and 174 transitions. [2024-06-27 21:32:27,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 143 transitions, 1073 flow [2024-06-27 21:32:27,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 143 transitions, 994 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 21:32:27,491 INFO L231 Difference]: Finished difference. Result has 85 places, 95 transitions, 666 flow [2024-06-27 21:32:27,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=666, PETRI_PLACES=85, PETRI_TRANSITIONS=95} [2024-06-27 21:32:27,492 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-27 21:32:27,492 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 95 transitions, 666 flow [2024-06-27 21:32:27,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:27,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:27,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:27,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:32:27,493 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:27,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:27,493 INFO L85 PathProgramCache]: Analyzing trace with hash 840340833, now seen corresponding path program 2 times [2024-06-27 21:32:27,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:27,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141863547] [2024-06-27 21:32:27,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:27,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:30,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:30,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141863547] [2024-06-27 21:32:30,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141863547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:30,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:30,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:30,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935292116] [2024-06-27 21:32:30,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:30,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:30,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:30,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:30,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:30,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:32:30,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 95 transitions, 666 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:30,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:30,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:32:30,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:32,743 INFO L124 PetriNetUnfolderBase]: 7497/10602 cut-off events. [2024-06-27 21:32:32,743 INFO L125 PetriNetUnfolderBase]: For 89562/89570 co-relation queries the response was YES. [2024-06-27 21:32:32,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49023 conditions, 10602 events. 7497/10602 cut-off events. For 89562/89570 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 56601 event pairs, 2619 based on Foata normal form. 24/10621 useless extension candidates. Maximal degree in co-relation 48993. Up to 9610 conditions per place. [2024-06-27 21:32:32,801 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 126 selfloop transitions, 33 changer transitions 0/165 dead transitions. [2024-06-27 21:32:32,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 165 transitions, 1330 flow [2024-06-27 21:32:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 21:32:32,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831730769230769 [2024-06-27 21:32:32,803 INFO L175 Difference]: Start difference. First operand has 85 places, 95 transitions, 666 flow. Second operand 8 states and 201 transitions. [2024-06-27 21:32:32,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 165 transitions, 1330 flow [2024-06-27 21:32:32,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 165 transitions, 1242 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:32,858 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 780 flow [2024-06-27 21:32:32,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=780, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-06-27 21:32:32,858 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-06-27 21:32:32,859 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 780 flow [2024-06-27 21:32:32,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:32,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:32,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:32,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:32:32,859 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:32,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:32,860 INFO L85 PathProgramCache]: Analyzing trace with hash 840334323, now seen corresponding path program 3 times [2024-06-27 21:32:32,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:32,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037828287] [2024-06-27 21:32:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:32,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:35,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:35,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037828287] [2024-06-27 21:32:35,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037828287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:35,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:35,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:35,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805160027] [2024-06-27 21:32:35,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:35,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:35,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:35,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:35,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:35,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:32:35,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 780 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:35,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:35,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:32:35,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:38,037 INFO L124 PetriNetUnfolderBase]: 7653/10831 cut-off events. [2024-06-27 21:32:38,037 INFO L125 PetriNetUnfolderBase]: For 92523/92523 co-relation queries the response was YES. [2024-06-27 21:32:38,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50432 conditions, 10831 events. 7653/10831 cut-off events. For 92523/92523 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 58088 event pairs, 2866 based on Foata normal form. 24/10847 useless extension candidates. Maximal degree in co-relation 50400. Up to 10153 conditions per place. [2024-06-27 21:32:38,095 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 115 selfloop transitions, 38 changer transitions 0/159 dead transitions. [2024-06-27 21:32:38,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 159 transitions, 1286 flow [2024-06-27 21:32:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:38,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 21:32:38,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 21:32:38,097 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 780 flow. Second operand 8 states and 195 transitions. [2024-06-27 21:32:38,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 159 transitions, 1286 flow [2024-06-27 21:32:38,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 159 transitions, 1242 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 21:32:38,176 INFO L231 Difference]: Finished difference. Result has 93 places, 103 transitions, 874 flow [2024-06-27 21:32:38,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=874, PETRI_PLACES=93, PETRI_TRANSITIONS=103} [2024-06-27 21:32:38,177 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-27 21:32:38,177 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 103 transitions, 874 flow [2024-06-27 21:32:38,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:38,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:38,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:38,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:32:38,178 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:38,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:38,178 INFO L85 PathProgramCache]: Analyzing trace with hash 840161343, now seen corresponding path program 4 times [2024-06-27 21:32:38,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:38,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356762433] [2024-06-27 21:32:38,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:38,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:40,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356762433] [2024-06-27 21:32:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356762433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:40,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:40,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:40,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253764155] [2024-06-27 21:32:40,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:40,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:40,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:40,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:40,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:32:40,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 103 transitions, 874 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:40,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:40,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:32:40,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:43,303 INFO L124 PetriNetUnfolderBase]: 7599/10760 cut-off events. [2024-06-27 21:32:43,303 INFO L125 PetriNetUnfolderBase]: For 99052/99060 co-relation queries the response was YES. [2024-06-27 21:32:43,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50649 conditions, 10760 events. 7599/10760 cut-off events. For 99052/99060 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 57819 event pairs, 2829 based on Foata normal form. 30/10785 useless extension candidates. Maximal degree in co-relation 50615. Up to 10149 conditions per place. [2024-06-27 21:32:43,360 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 131 selfloop transitions, 22 changer transitions 0/159 dead transitions. [2024-06-27 21:32:43,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 159 transitions, 1334 flow [2024-06-27 21:32:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:43,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 21:32:43,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 21:32:43,362 INFO L175 Difference]: Start difference. First operand has 93 places, 103 transitions, 874 flow. Second operand 8 states and 192 transitions. [2024-06-27 21:32:43,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 159 transitions, 1334 flow [2024-06-27 21:32:43,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 159 transitions, 1238 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 21:32:43,472 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 835 flow [2024-06-27 21:32:43,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=835, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2024-06-27 21:32:43,473 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 40 predicate places. [2024-06-27 21:32:43,473 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 835 flow [2024-06-27 21:32:43,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:43,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:43,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:43,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:32:43,473 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:43,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:43,474 INFO L85 PathProgramCache]: Analyzing trace with hash 907421843, now seen corresponding path program 1 times [2024-06-27 21:32:43,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:43,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307548943] [2024-06-27 21:32:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:43,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:46,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:46,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307548943] [2024-06-27 21:32:46,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307548943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:46,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:46,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:46,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106032059] [2024-06-27 21:32:46,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:46,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:46,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:46,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:46,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:46,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:32:46,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 835 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:46,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:46,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:32:46,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:48,519 INFO L124 PetriNetUnfolderBase]: 7711/10931 cut-off events. [2024-06-27 21:32:48,519 INFO L125 PetriNetUnfolderBase]: For 107281/107281 co-relation queries the response was YES. [2024-06-27 21:32:48,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51869 conditions, 10931 events. 7711/10931 cut-off events. For 107281/107281 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 58994 event pairs, 2082 based on Foata normal form. 18/10929 useless extension candidates. Maximal degree in co-relation 51834. Up to 10384 conditions per place. [2024-06-27 21:32:48,577 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 128 selfloop transitions, 17 changer transitions 0/151 dead transitions. [2024-06-27 21:32:48,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 151 transitions, 1287 flow [2024-06-27 21:32:48,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:32:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:32:48,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 21:32:48,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879120879120877 [2024-06-27 21:32:48,578 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 835 flow. Second operand 7 states and 167 transitions. [2024-06-27 21:32:48,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 151 transitions, 1287 flow [2024-06-27 21:32:48,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 151 transitions, 1211 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 21:32:48,675 INFO L231 Difference]: Finished difference. Result has 94 places, 105 transitions, 852 flow [2024-06-27 21:32:48,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=852, PETRI_PLACES=94, PETRI_TRANSITIONS=105} [2024-06-27 21:32:48,676 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-27 21:32:48,676 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 105 transitions, 852 flow [2024-06-27 21:32:48,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:48,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:48,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:48,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:32:48,676 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:48,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:48,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1407616473, now seen corresponding path program 2 times [2024-06-27 21:32:48,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:48,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789070108] [2024-06-27 21:32:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:48,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:51,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:51,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789070108] [2024-06-27 21:32:51,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789070108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:51,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:51,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:51,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586006889] [2024-06-27 21:32:51,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:51,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:51,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:51,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:51,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:51,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:32:51,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 105 transitions, 852 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:51,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:51,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:32:51,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:53,664 INFO L124 PetriNetUnfolderBase]: 7784/11058 cut-off events. [2024-06-27 21:32:53,665 INFO L125 PetriNetUnfolderBase]: For 118130/118130 co-relation queries the response was YES. [2024-06-27 21:32:53,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53277 conditions, 11058 events. 7784/11058 cut-off events. For 118130/118130 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 60055 event pairs, 2731 based on Foata normal form. 18/11068 useless extension candidates. Maximal degree in co-relation 53242. Up to 10295 conditions per place. [2024-06-27 21:32:53,724 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 119 selfloop transitions, 29 changer transitions 0/154 dead transitions. [2024-06-27 21:32:53,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 154 transitions, 1324 flow [2024-06-27 21:32:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:32:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:32:53,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 21:32:53,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 21:32:53,726 INFO L175 Difference]: Start difference. First operand has 94 places, 105 transitions, 852 flow. Second operand 7 states and 168 transitions. [2024-06-27 21:32:53,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 154 transitions, 1324 flow [2024-06-27 21:32:53,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 154 transitions, 1263 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:53,839 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 926 flow [2024-06-27 21:32:53,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=926, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2024-06-27 21:32:53,840 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 40 predicate places. [2024-06-27 21:32:53,840 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 926 flow [2024-06-27 21:32:53,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:53,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:53,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:53,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:32:53,840 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:53,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash 714250529, now seen corresponding path program 1 times [2024-06-27 21:32:53,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:53,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16723114] [2024-06-27 21:32:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:53,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:56,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:56,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16723114] [2024-06-27 21:32:56,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16723114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:56,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:56,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:32:56,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969174054] [2024-06-27 21:32:56,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:56,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:32:56,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:56,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:32:56,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:32:56,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:32:56,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 926 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:56,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:56,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:32:56,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:57,859 INFO L124 PetriNetUnfolderBase]: 6468/9261 cut-off events. [2024-06-27 21:32:57,859 INFO L125 PetriNetUnfolderBase]: For 112937/112937 co-relation queries the response was YES. [2024-06-27 21:32:57,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46793 conditions, 9261 events. 6468/9261 cut-off events. For 112937/112937 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 51319 event pairs, 2392 based on Foata normal form. 16/9273 useless extension candidates. Maximal degree in co-relation 46757. Up to 8883 conditions per place. [2024-06-27 21:32:57,912 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 117 selfloop transitions, 18 changer transitions 0/142 dead transitions. [2024-06-27 21:32:57,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 142 transitions, 1334 flow [2024-06-27 21:32:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:32:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:32:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 21:32:57,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-27 21:32:57,913 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 926 flow. Second operand 6 states and 144 transitions. [2024-06-27 21:32:57,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 142 transitions, 1334 flow [2024-06-27 21:32:57,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 142 transitions, 1237 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:57,996 INFO L231 Difference]: Finished difference. Result has 96 places, 113 transitions, 948 flow [2024-06-27 21:32:57,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=948, PETRI_PLACES=96, PETRI_TRANSITIONS=113} [2024-06-27 21:32:57,997 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-27 21:32:57,997 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 113 transitions, 948 flow [2024-06-27 21:32:57,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:57,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:57,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:57,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:32:57,997 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:32:57,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:57,998 INFO L85 PathProgramCache]: Analyzing trace with hash 719012129, now seen corresponding path program 2 times [2024-06-27 21:32:57,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:57,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589758751] [2024-06-27 21:32:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:57,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:00,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:00,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589758751] [2024-06-27 21:33:00,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589758751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:00,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:00,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:33:00,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850484777] [2024-06-27 21:33:00,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:00,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:33:00,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:00,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:33:00,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:33:00,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:33:00,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 113 transitions, 948 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:00,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:00,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:33:00,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:02,119 INFO L124 PetriNetUnfolderBase]: 6518/9317 cut-off events. [2024-06-27 21:33:02,119 INFO L125 PetriNetUnfolderBase]: For 123960/123960 co-relation queries the response was YES. [2024-06-27 21:33:02,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49310 conditions, 9317 events. 6518/9317 cut-off events. For 123960/123960 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 51564 event pairs, 2369 based on Foata normal form. 8/9318 useless extension candidates. Maximal degree in co-relation 49273. Up to 8976 conditions per place. [2024-06-27 21:33:02,175 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 123 selfloop transitions, 17 changer transitions 0/147 dead transitions. [2024-06-27 21:33:02,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 147 transitions, 1384 flow [2024-06-27 21:33:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:33:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:33:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 21:33:02,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-27 21:33:02,176 INFO L175 Difference]: Start difference. First operand has 96 places, 113 transitions, 948 flow. Second operand 6 states and 140 transitions. [2024-06-27 21:33:02,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 147 transitions, 1384 flow [2024-06-27 21:33:02,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 147 transitions, 1311 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:33:02,269 INFO L231 Difference]: Finished difference. Result has 99 places, 121 transitions, 1018 flow [2024-06-27 21:33:02,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1018, PETRI_PLACES=99, PETRI_TRANSITIONS=121} [2024-06-27 21:33:02,270 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-27 21:33:02,270 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 121 transitions, 1018 flow [2024-06-27 21:33:02,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:02,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:02,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:02,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:33:02,271 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:02,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:02,271 INFO L85 PathProgramCache]: Analyzing trace with hash 666842309, now seen corresponding path program 1 times [2024-06-27 21:33:02,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:02,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132943344] [2024-06-27 21:33:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:02,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:04,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:04,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132943344] [2024-06-27 21:33:04,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132943344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:04,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:04,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:33:04,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136362323] [2024-06-27 21:33:04,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:04,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:33:04,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:04,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:33:04,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:33:04,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:33:04,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 121 transitions, 1018 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:04,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:04,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:33:04,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:06,960 INFO L124 PetriNetUnfolderBase]: 6556/9374 cut-off events. [2024-06-27 21:33:06,960 INFO L125 PetriNetUnfolderBase]: For 140286/140286 co-relation queries the response was YES. [2024-06-27 21:33:06,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51708 conditions, 9374 events. 6556/9374 cut-off events. For 140286/140286 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 52167 event pairs, 2368 based on Foata normal form. 4/9374 useless extension candidates. Maximal degree in co-relation 51669. Up to 8978 conditions per place. [2024-06-27 21:33:07,017 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 144 selfloop transitions, 36 changer transitions 0/187 dead transitions. [2024-06-27 21:33:07,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 187 transitions, 1911 flow [2024-06-27 21:33:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 21:33:07,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495192307692308 [2024-06-27 21:33:07,019 INFO L175 Difference]: Start difference. First operand has 99 places, 121 transitions, 1018 flow. Second operand 8 states and 187 transitions. [2024-06-27 21:33:07,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 187 transitions, 1911 flow [2024-06-27 21:33:07,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 187 transitions, 1809 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-27 21:33:07,132 INFO L231 Difference]: Finished difference. Result has 107 places, 144 transitions, 1339 flow [2024-06-27 21:33:07,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1339, PETRI_PLACES=107, PETRI_TRANSITIONS=144} [2024-06-27 21:33:07,133 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-27 21:33:07,133 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 144 transitions, 1339 flow [2024-06-27 21:33:07,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:07,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:07,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:07,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:33:07,133 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:07,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:07,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1416975755, now seen corresponding path program 2 times [2024-06-27 21:33:07,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:07,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860416480] [2024-06-27 21:33:07,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:07,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:09,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:09,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860416480] [2024-06-27 21:33:09,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860416480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:09,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:09,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:33:09,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28838897] [2024-06-27 21:33:09,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:09,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:33:09,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:09,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:33:09,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:33:09,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:33:09,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 144 transitions, 1339 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:09,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:09,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:33:09,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:12,273 INFO L124 PetriNetUnfolderBase]: 6982/9960 cut-off events. [2024-06-27 21:33:12,273 INFO L125 PetriNetUnfolderBase]: For 165255/165258 co-relation queries the response was YES. [2024-06-27 21:33:12,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58025 conditions, 9960 events. 6982/9960 cut-off events. For 165255/165258 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 55226 event pairs, 2360 based on Foata normal form. 8/9961 useless extension candidates. Maximal degree in co-relation 57982. Up to 9269 conditions per place. [2024-06-27 21:33:12,343 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 150 selfloop transitions, 57 changer transitions 0/214 dead transitions. [2024-06-27 21:33:12,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 214 transitions, 2350 flow [2024-06-27 21:33:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 21:33:12,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-27 21:33:12,345 INFO L175 Difference]: Start difference. First operand has 107 places, 144 transitions, 1339 flow. Second operand 8 states and 193 transitions. [2024-06-27 21:33:12,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 214 transitions, 2350 flow [2024-06-27 21:33:12,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 214 transitions, 2244 flow, removed 52 selfloop flow, removed 1 redundant places. [2024-06-27 21:33:12,512 INFO L231 Difference]: Finished difference. Result has 115 places, 172 transitions, 1777 flow [2024-06-27 21:33:12,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1777, PETRI_PLACES=115, PETRI_TRANSITIONS=172} [2024-06-27 21:33:12,513 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-27 21:33:12,513 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 172 transitions, 1777 flow [2024-06-27 21:33:12,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:12,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:12,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:12,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:33:12,513 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:12,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:12,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1765433866, now seen corresponding path program 1 times [2024-06-27 21:33:12,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:12,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260790786] [2024-06-27 21:33:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:12,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:15,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:15,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260790786] [2024-06-27 21:33:15,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260790786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:15,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:15,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:15,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687160868] [2024-06-27 21:33:15,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:15,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:15,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:15,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:15,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:33:15,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 172 transitions, 1777 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:15,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:15,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:33:15,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:18,598 INFO L124 PetriNetUnfolderBase]: 8446/11771 cut-off events. [2024-06-27 21:33:18,599 INFO L125 PetriNetUnfolderBase]: For 229315/229318 co-relation queries the response was YES. [2024-06-27 21:33:18,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73122 conditions, 11771 events. 8446/11771 cut-off events. For 229315/229318 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 63229 event pairs, 2903 based on Foata normal form. 26/11790 useless extension candidates. Maximal degree in co-relation 73075. Up to 11367 conditions per place. [2024-06-27 21:33:18,671 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 174 selfloop transitions, 36 changer transitions 0/216 dead transitions. [2024-06-27 21:33:18,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 216 transitions, 2447 flow [2024-06-27 21:33:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-27 21:33:18,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40865384615384615 [2024-06-27 21:33:18,673 INFO L175 Difference]: Start difference. First operand has 115 places, 172 transitions, 1777 flow. Second operand 8 states and 170 transitions. [2024-06-27 21:33:18,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 216 transitions, 2447 flow [2024-06-27 21:33:18,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 216 transitions, 2297 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-27 21:33:18,906 INFO L231 Difference]: Finished difference. Result has 122 places, 182 transitions, 1848 flow [2024-06-27 21:33:18,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1848, PETRI_PLACES=122, PETRI_TRANSITIONS=182} [2024-06-27 21:33:18,907 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 67 predicate places. [2024-06-27 21:33:18,907 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 182 transitions, 1848 flow [2024-06-27 21:33:18,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:18,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:18,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:18,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:33:18,907 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:18,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:18,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1632103524, now seen corresponding path program 1 times [2024-06-27 21:33:18,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:18,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618542374] [2024-06-27 21:33:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:18,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:21,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:21,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618542374] [2024-06-27 21:33:21,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618542374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:21,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:21,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:21,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20307515] [2024-06-27 21:33:21,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:21,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:21,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:21,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:21,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:21,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:33:21,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 182 transitions, 1848 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:21,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:21,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:33:21,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:24,389 INFO L124 PetriNetUnfolderBase]: 8185/11635 cut-off events. [2024-06-27 21:33:24,389 INFO L125 PetriNetUnfolderBase]: For 239359/239362 co-relation queries the response was YES. [2024-06-27 21:33:24,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73802 conditions, 11635 events. 8185/11635 cut-off events. For 239359/239362 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 65715 event pairs, 2537 based on Foata normal form. 16/11634 useless extension candidates. Maximal degree in co-relation 73751. Up to 10765 conditions per place. [2024-06-27 21:33:24,469 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 194 selfloop transitions, 44 changer transitions 0/246 dead transitions. [2024-06-27 21:33:24,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 246 transitions, 2780 flow [2024-06-27 21:33:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 21:33:24,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-27 21:33:24,471 INFO L175 Difference]: Start difference. First operand has 122 places, 182 transitions, 1848 flow. Second operand 8 states and 204 transitions. [2024-06-27 21:33:24,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 246 transitions, 2780 flow [2024-06-27 21:33:24,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 246 transitions, 2704 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 21:33:24,695 INFO L231 Difference]: Finished difference. Result has 126 places, 186 transitions, 1975 flow [2024-06-27 21:33:24,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1975, PETRI_PLACES=126, PETRI_TRANSITIONS=186} [2024-06-27 21:33:24,695 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 71 predicate places. [2024-06-27 21:33:24,695 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 186 transitions, 1975 flow [2024-06-27 21:33:24,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:24,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:24,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:24,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:33:24,696 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:24,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:24,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1632043074, now seen corresponding path program 2 times [2024-06-27 21:33:24,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:24,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871769312] [2024-06-27 21:33:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:24,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:27,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:27,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871769312] [2024-06-27 21:33:27,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871769312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:27,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:27,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:27,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316303529] [2024-06-27 21:33:27,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:27,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:27,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:27,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:33:27,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 186 transitions, 1975 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:27,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:27,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:33:27,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:30,502 INFO L124 PetriNetUnfolderBase]: 8220/11682 cut-off events. [2024-06-27 21:33:30,502 INFO L125 PetriNetUnfolderBase]: For 259090/259093 co-relation queries the response was YES. [2024-06-27 21:33:30,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75607 conditions, 11682 events. 8220/11682 cut-off events. For 259090/259093 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 65979 event pairs, 2708 based on Foata normal form. 20/11685 useless extension candidates. Maximal degree in co-relation 75555. Up to 11100 conditions per place. [2024-06-27 21:33:30,580 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 191 selfloop transitions, 40 changer transitions 0/239 dead transitions. [2024-06-27 21:33:30,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 239 transitions, 2739 flow [2024-06-27 21:33:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:30,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 21:33:30,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-27 21:33:30,581 INFO L175 Difference]: Start difference. First operand has 126 places, 186 transitions, 1975 flow. Second operand 8 states and 196 transitions. [2024-06-27 21:33:30,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 239 transitions, 2739 flow [2024-06-27 21:33:30,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 239 transitions, 2656 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 21:33:30,803 INFO L231 Difference]: Finished difference. Result has 130 places, 188 transitions, 2040 flow [2024-06-27 21:33:30,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2040, PETRI_PLACES=130, PETRI_TRANSITIONS=188} [2024-06-27 21:33:30,804 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-27 21:33:30,804 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 188 transitions, 2040 flow [2024-06-27 21:33:30,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:30,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:30,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:30,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:33:30,805 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:30,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:30,805 INFO L85 PathProgramCache]: Analyzing trace with hash -799925760, now seen corresponding path program 3 times [2024-06-27 21:33:30,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:30,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572497207] [2024-06-27 21:33:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:30,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:35,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:35,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572497207] [2024-06-27 21:33:35,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572497207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:35,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:35,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:35,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297569161] [2024-06-27 21:33:35,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:35,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:35,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:35,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:35,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:35,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:33:35,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 188 transitions, 2040 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:35,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:35,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:33:35,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:38,393 INFO L124 PetriNetUnfolderBase]: 8825/12570 cut-off events. [2024-06-27 21:33:38,394 INFO L125 PetriNetUnfolderBase]: For 298061/298064 co-relation queries the response was YES. [2024-06-27 21:33:38,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81086 conditions, 12570 events. 8825/12570 cut-off events. For 298061/298064 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 71650 event pairs, 2756 based on Foata normal form. 88/12655 useless extension candidates. Maximal degree in co-relation 81032. Up to 11382 conditions per place. [2024-06-27 21:33:38,500 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 206 selfloop transitions, 26 changer transitions 0/240 dead transitions. [2024-06-27 21:33:38,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 240 transitions, 2754 flow [2024-06-27 21:33:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 21:33:38,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567307692307692 [2024-06-27 21:33:38,502 INFO L175 Difference]: Start difference. First operand has 130 places, 188 transitions, 2040 flow. Second operand 8 states and 190 transitions. [2024-06-27 21:33:38,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 240 transitions, 2754 flow [2024-06-27 21:33:38,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 240 transitions, 2656 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:38,918 INFO L231 Difference]: Finished difference. Result has 133 places, 195 transitions, 2108 flow [2024-06-27 21:33:38,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2108, PETRI_PLACES=133, PETRI_TRANSITIONS=195} [2024-06-27 21:33:38,919 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-06-27 21:33:38,919 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 195 transitions, 2108 flow [2024-06-27 21:33:38,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:38,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:38,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:38,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:33:38,919 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:38,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:38,920 INFO L85 PathProgramCache]: Analyzing trace with hash -512324256, now seen corresponding path program 1 times [2024-06-27 21:33:38,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:38,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118996214] [2024-06-27 21:33:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:38,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:41,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:41,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118996214] [2024-06-27 21:33:41,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118996214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:41,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:41,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:41,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896334910] [2024-06-27 21:33:41,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:41,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:41,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:41,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:41,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:41,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:33:41,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 195 transitions, 2108 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:41,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:41,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:33:41,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:44,767 INFO L124 PetriNetUnfolderBase]: 9755/13634 cut-off events. [2024-06-27 21:33:44,767 INFO L125 PetriNetUnfolderBase]: For 329588/329591 co-relation queries the response was YES. [2024-06-27 21:33:44,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89286 conditions, 13634 events. 9755/13634 cut-off events. For 329588/329591 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 75198 event pairs, 3280 based on Foata normal form. 8/13635 useless extension candidates. Maximal degree in co-relation 89230. Up to 13289 conditions per place. [2024-06-27 21:33:44,868 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 181 selfloop transitions, 62 changer transitions 0/249 dead transitions. [2024-06-27 21:33:44,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 249 transitions, 3028 flow [2024-06-27 21:33:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:33:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:33:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-27 21:33:44,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 21:33:44,870 INFO L175 Difference]: Start difference. First operand has 133 places, 195 transitions, 2108 flow. Second operand 7 states and 156 transitions. [2024-06-27 21:33:44,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 249 transitions, 3028 flow [2024-06-27 21:33:45,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 249 transitions, 2807 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:45,315 INFO L231 Difference]: Finished difference. Result has 135 places, 218 transitions, 2432 flow [2024-06-27 21:33:45,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2432, PETRI_PLACES=135, PETRI_TRANSITIONS=218} [2024-06-27 21:33:45,316 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-27 21:33:45,316 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 218 transitions, 2432 flow [2024-06-27 21:33:45,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:45,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:45,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:45,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:33:45,316 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:45,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:45,316 INFO L85 PathProgramCache]: Analyzing trace with hash -518995456, now seen corresponding path program 4 times [2024-06-27 21:33:45,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:45,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298917715] [2024-06-27 21:33:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:45,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:48,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:48,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298917715] [2024-06-27 21:33:48,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298917715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:48,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:48,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:48,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957944252] [2024-06-27 21:33:48,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:48,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:48,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:48,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:48,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:48,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-27 21:33:48,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 218 transitions, 2432 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:48,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:48,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-27 21:33:48,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:51,889 INFO L124 PetriNetUnfolderBase]: 9458/13459 cut-off events. [2024-06-27 21:33:51,889 INFO L125 PetriNetUnfolderBase]: For 360039/360042 co-relation queries the response was YES. [2024-06-27 21:33:51,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88791 conditions, 13459 events. 9458/13459 cut-off events. For 360039/360042 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 77776 event pairs, 2937 based on Foata normal form. 112/13564 useless extension candidates. Maximal degree in co-relation 88734. Up to 11869 conditions per place. [2024-06-27 21:33:51,982 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 182 selfloop transitions, 74 changer transitions 0/264 dead transitions. [2024-06-27 21:33:51,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 264 transitions, 3234 flow [2024-06-27 21:33:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 21:33:51,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4337606837606838 [2024-06-27 21:33:51,984 INFO L175 Difference]: Start difference. First operand has 135 places, 218 transitions, 2432 flow. Second operand 9 states and 203 transitions. [2024-06-27 21:33:51,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 264 transitions, 3234 flow [2024-06-27 21:33:52,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 264 transitions, 2981 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:52,364 INFO L231 Difference]: Finished difference. Result has 140 places, 223 transitions, 2511 flow [2024-06-27 21:33:52,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2511, PETRI_PLACES=140, PETRI_TRANSITIONS=223} [2024-06-27 21:33:52,365 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 85 predicate places. [2024-06-27 21:33:52,365 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 223 transitions, 2511 flow [2024-06-27 21:33:52,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:52,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:52,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:52,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:33:52,366 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:52,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash -725779912, now seen corresponding path program 1 times [2024-06-27 21:33:52,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:52,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774913213] [2024-06-27 21:33:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:52,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:53,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:53,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774913213] [2024-06-27 21:33:53,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774913213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:53,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:53,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:33:53,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343193885] [2024-06-27 21:33:53,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:53,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:33:53,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:53,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:33:53,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:33:53,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2024-06-27 21:33:53,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 223 transitions, 2511 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 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) [2024-06-27 21:33:53,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:53,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2024-06-27 21:33:53,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:57,174 INFO L124 PetriNetUnfolderBase]: 12878/17922 cut-off events. [2024-06-27 21:33:57,175 INFO L125 PetriNetUnfolderBase]: For 456882/456882 co-relation queries the response was YES. [2024-06-27 21:33:57,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116646 conditions, 17922 events. 12878/17922 cut-off events. For 456882/456882 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 100014 event pairs, 3907 based on Foata normal form. 2/17921 useless extension candidates. Maximal degree in co-relation 116587. Up to 17801 conditions per place. [2024-06-27 21:33:57,302 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 231 selfloop transitions, 10 changer transitions 0/246 dead transitions. [2024-06-27 21:33:57,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 246 transitions, 3129 flow [2024-06-27 21:33:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:33:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:33:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-27 21:33:57,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:33:57,303 INFO L175 Difference]: Start difference. First operand has 140 places, 223 transitions, 2511 flow. Second operand 5 states and 104 transitions. [2024-06-27 21:33:57,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 246 transitions, 3129 flow [2024-06-27 21:33:58,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 246 transitions, 2981 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-27 21:33:58,336 INFO L231 Difference]: Finished difference. Result has 142 places, 231 transitions, 2502 flow [2024-06-27 21:33:58,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2369, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2502, PETRI_PLACES=142, PETRI_TRANSITIONS=231} [2024-06-27 21:33:58,336 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 87 predicate places. [2024-06-27 21:33:58,337 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 231 transitions, 2502 flow [2024-06-27 21:33:58,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 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) [2024-06-27 21:33:58,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:58,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:58,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:33:58,337 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:33:58,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:58,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1810084334, now seen corresponding path program 1 times [2024-06-27 21:33:58,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:58,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047743651] [2024-06-27 21:33:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:58,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:01,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047743651] [2024-06-27 21:34:01,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047743651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:01,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:01,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:01,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596365174] [2024-06-27 21:34:01,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:01,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:01,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:01,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:01,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:01,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:34:01,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 231 transitions, 2502 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:01,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:01,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:34:01,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:05,916 INFO L124 PetriNetUnfolderBase]: 12121/17064 cut-off events. [2024-06-27 21:34:05,916 INFO L125 PetriNetUnfolderBase]: For 426408/426411 co-relation queries the response was YES. [2024-06-27 21:34:05,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112028 conditions, 17064 events. 12121/17064 cut-off events. For 426408/426411 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 98242 event pairs, 2956 based on Foata normal form. 16/17061 useless extension candidates. Maximal degree in co-relation 111966. Up to 16099 conditions per place. [2024-06-27 21:34:06,048 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 228 selfloop transitions, 40 changer transitions 0/275 dead transitions. [2024-06-27 21:34:06,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 275 transitions, 3424 flow [2024-06-27 21:34:06,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:06,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 21:34:06,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775641025641026 [2024-06-27 21:34:06,050 INFO L175 Difference]: Start difference. First operand has 142 places, 231 transitions, 2502 flow. Second operand 6 states and 149 transitions. [2024-06-27 21:34:06,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 275 transitions, 3424 flow [2024-06-27 21:34:06,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 275 transitions, 3388 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 21:34:06,607 INFO L231 Difference]: Finished difference. Result has 147 places, 235 transitions, 2673 flow [2024-06-27 21:34:06,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2466, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2673, PETRI_PLACES=147, PETRI_TRANSITIONS=235} [2024-06-27 21:34:06,608 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 92 predicate places. [2024-06-27 21:34:06,608 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 235 transitions, 2673 flow [2024-06-27 21:34:06,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:06,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:06,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:06,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:34:06,609 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:34:06,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:06,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1205134874, now seen corresponding path program 2 times [2024-06-27 21:34:06,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:06,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315715470] [2024-06-27 21:34:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:06,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:10,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:10,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315715470] [2024-06-27 21:34:10,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315715470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:10,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:10,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:10,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791809711] [2024-06-27 21:34:10,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:10,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:10,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:10,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:10,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:10,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:34:10,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 235 transitions, 2673 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:10,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:10,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:34:10,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:13,702 INFO L124 PetriNetUnfolderBase]: 12077/17013 cut-off events. [2024-06-27 21:34:13,702 INFO L125 PetriNetUnfolderBase]: For 445227/445230 co-relation queries the response was YES. [2024-06-27 21:34:13,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113022 conditions, 17013 events. 12077/17013 cut-off events. For 445227/445230 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 98173 event pairs, 3441 based on Foata normal form. 16/17023 useless extension candidates. Maximal degree in co-relation 112957. Up to 16241 conditions per place. [2024-06-27 21:34:13,857 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 220 selfloop transitions, 38 changer transitions 0/265 dead transitions. [2024-06-27 21:34:13,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 265 transitions, 3317 flow [2024-06-27 21:34:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:34:13,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:34:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 21:34:13,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-27 21:34:13,858 INFO L175 Difference]: Start difference. First operand has 147 places, 235 transitions, 2673 flow. Second operand 6 states and 141 transitions. [2024-06-27 21:34:13,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 265 transitions, 3317 flow [2024-06-27 21:34:14,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 265 transitions, 3229 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-27 21:34:14,688 INFO L231 Difference]: Finished difference. Result has 151 places, 235 transitions, 2676 flow [2024-06-27 21:34:14,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2585, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2676, PETRI_PLACES=151, PETRI_TRANSITIONS=235} [2024-06-27 21:34:14,689 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-27 21:34:14,689 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 235 transitions, 2676 flow [2024-06-27 21:34:14,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:14,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:14,690 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] [2024-06-27 21:34:14,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:34:14,690 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:34:14,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:14,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1230333968, now seen corresponding path program 1 times [2024-06-27 21:34:14,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:14,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966560022] [2024-06-27 21:34:14,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:14,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:17,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:17,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966560022] [2024-06-27 21:34:17,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966560022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:17,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:17,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:17,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252097897] [2024-06-27 21:34:17,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:17,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:17,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:17,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:17,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:18,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:34:18,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 235 transitions, 2676 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:18,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:18,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:34:18,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:21,978 INFO L124 PetriNetUnfolderBase]: 12115/17063 cut-off events. [2024-06-27 21:34:21,978 INFO L125 PetriNetUnfolderBase]: For 458510/458513 co-relation queries the response was YES. [2024-06-27 21:34:22,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114180 conditions, 17063 events. 12115/17063 cut-off events. For 458510/458513 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 98446 event pairs, 3330 based on Foata normal form. 4/17048 useless extension candidates. Maximal degree in co-relation 114113. Up to 16265 conditions per place. [2024-06-27 21:34:22,115 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 193 selfloop transitions, 73 changer transitions 0/273 dead transitions. [2024-06-27 21:34:22,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 273 transitions, 3423 flow [2024-06-27 21:34:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-27 21:34:22,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340659340659341 [2024-06-27 21:34:22,117 INFO L175 Difference]: Start difference. First operand has 151 places, 235 transitions, 2676 flow. Second operand 7 states and 158 transitions. [2024-06-27 21:34:22,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 273 transitions, 3423 flow [2024-06-27 21:34:22,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 273 transitions, 3338 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:22,739 INFO L231 Difference]: Finished difference. Result has 153 places, 239 transitions, 2867 flow [2024-06-27 21:34:22,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2591, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2867, PETRI_PLACES=153, PETRI_TRANSITIONS=239} [2024-06-27 21:34:22,740 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-27 21:34:22,740 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 239 transitions, 2867 flow [2024-06-27 21:34:22,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:22,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:22,740 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] [2024-06-27 21:34:22,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:34:22,741 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:34:22,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:22,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1913357588, now seen corresponding path program 2 times [2024-06-27 21:34:22,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:22,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737512334] [2024-06-27 21:34:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:22,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:22,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:26,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:26,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737512334] [2024-06-27 21:34:26,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737512334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:26,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:26,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:26,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235390627] [2024-06-27 21:34:26,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:26,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:26,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:26,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:26,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:26,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:34:26,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 239 transitions, 2867 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:26,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:26,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:34:26,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:30,607 INFO L124 PetriNetUnfolderBase]: 12101/17064 cut-off events. [2024-06-27 21:34:30,608 INFO L125 PetriNetUnfolderBase]: For 489347/489355 co-relation queries the response was YES. [2024-06-27 21:34:30,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117003 conditions, 17064 events. 12101/17064 cut-off events. For 489347/489355 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 98643 event pairs, 3339 based on Foata normal form. 10/17063 useless extension candidates. Maximal degree in co-relation 116935. Up to 16554 conditions per place. [2024-06-27 21:34:30,737 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 245 selfloop transitions, 26 changer transitions 0/278 dead transitions. [2024-06-27 21:34:30,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 278 transitions, 3619 flow [2024-06-27 21:34:30,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:34:30,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:34:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 21:34:30,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-27 21:34:30,738 INFO L175 Difference]: Start difference. First operand has 153 places, 239 transitions, 2867 flow. Second operand 7 states and 161 transitions. [2024-06-27 21:34:30,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 278 transitions, 3619 flow [2024-06-27 21:34:31,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 278 transitions, 3391 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:31,438 INFO L231 Difference]: Finished difference. Result has 155 places, 243 transitions, 2822 flow [2024-06-27 21:34:31,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2641, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2822, PETRI_PLACES=155, PETRI_TRANSITIONS=243} [2024-06-27 21:34:31,439 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 100 predicate places. [2024-06-27 21:34:31,439 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 243 transitions, 2822 flow [2024-06-27 21:34:31,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:31,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:31,439 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] [2024-06-27 21:34:31,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:34:31,440 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:34:31,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:31,440 INFO L85 PathProgramCache]: Analyzing trace with hash 972261793, now seen corresponding path program 1 times [2024-06-27 21:34:31,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:31,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132486127] [2024-06-27 21:34:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:31,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:35,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:35,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132486127] [2024-06-27 21:34:35,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132486127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:35,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:35,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:35,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066046445] [2024-06-27 21:34:35,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:35,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:35,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:35,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:35,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:35,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:34:35,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 243 transitions, 2822 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:35,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:35,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:34:35,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:39,353 INFO L124 PetriNetUnfolderBase]: 12303/17488 cut-off events. [2024-06-27 21:34:39,353 INFO L125 PetriNetUnfolderBase]: For 569138/569141 co-relation queries the response was YES. [2024-06-27 21:34:39,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124195 conditions, 17488 events. 12303/17488 cut-off events. For 569138/569141 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 99564 event pairs, 3840 based on Foata normal form. 28/17511 useless extension candidates. Maximal degree in co-relation 124126. Up to 16988 conditions per place. [2024-06-27 21:34:39,510 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 255 selfloop transitions, 30 changer transitions 0/293 dead transitions. [2024-06-27 21:34:39,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 293 transitions, 3673 flow [2024-06-27 21:34:39,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 21:34:39,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43509615384615385 [2024-06-27 21:34:39,512 INFO L175 Difference]: Start difference. First operand has 155 places, 243 transitions, 2822 flow. Second operand 8 states and 181 transitions. [2024-06-27 21:34:39,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 293 transitions, 3673 flow [2024-06-27 21:34:40,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 293 transitions, 3515 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:40,321 INFO L231 Difference]: Finished difference. Result has 159 places, 251 transitions, 2877 flow [2024-06-27 21:34:40,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2877, PETRI_PLACES=159, PETRI_TRANSITIONS=251} [2024-06-27 21:34:40,321 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 104 predicate places. [2024-06-27 21:34:40,321 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 251 transitions, 2877 flow [2024-06-27 21:34:40,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:40,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:40,322 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] [2024-06-27 21:34:40,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:34:40,322 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:34:40,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:40,322 INFO L85 PathProgramCache]: Analyzing trace with hash -276702409, now seen corresponding path program 2 times [2024-06-27 21:34:40,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:40,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272778259] [2024-06-27 21:34:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:40,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:43,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:43,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272778259] [2024-06-27 21:34:43,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272778259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:43,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:43,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:43,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68775376] [2024-06-27 21:34:43,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:43,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:43,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:43,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:43,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:43,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:34:43,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 251 transitions, 2877 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:43,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:43,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:34:43,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:48,093 INFO L124 PetriNetUnfolderBase]: 12599/17902 cut-off events. [2024-06-27 21:34:48,093 INFO L125 PetriNetUnfolderBase]: For 615668/615671 co-relation queries the response was YES. [2024-06-27 21:34:48,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129944 conditions, 17902 events. 12599/17902 cut-off events. For 615668/615671 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 102500 event pairs, 3838 based on Foata normal form. 40/17933 useless extension candidates. Maximal degree in co-relation 129873. Up to 16982 conditions per place. [2024-06-27 21:34:48,517 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 210 selfloop transitions, 92 changer transitions 0/310 dead transitions. [2024-06-27 21:34:48,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 310 transitions, 3933 flow [2024-06-27 21:34:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 21:34:48,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 21:34:48,518 INFO L175 Difference]: Start difference. First operand has 159 places, 251 transitions, 2877 flow. Second operand 8 states and 182 transitions. [2024-06-27 21:34:48,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 310 transitions, 3933 flow [2024-06-27 21:34:49,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 310 transitions, 3842 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:49,344 INFO L231 Difference]: Finished difference. Result has 163 places, 264 transitions, 3270 flow [2024-06-27 21:34:49,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3270, PETRI_PLACES=163, PETRI_TRANSITIONS=264} [2024-06-27 21:34:49,345 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 108 predicate places. [2024-06-27 21:34:49,345 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 264 transitions, 3270 flow [2024-06-27 21:34:49,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:49,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:49,346 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] [2024-06-27 21:34:49,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:34:49,346 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:34:49,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:49,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1290468415, now seen corresponding path program 3 times [2024-06-27 21:34:49,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:49,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390342179] [2024-06-27 21:34:49,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:49,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:52,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:52,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390342179] [2024-06-27 21:34:52,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390342179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:52,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:52,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:52,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383976918] [2024-06-27 21:34:52,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:52,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:52,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:52,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:52,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:52,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:34:52,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 264 transitions, 3270 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:52,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:52,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:34:52,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:57,395 INFO L124 PetriNetUnfolderBase]: 12735/18100 cut-off events. [2024-06-27 21:34:57,395 INFO L125 PetriNetUnfolderBase]: For 649465/649468 co-relation queries the response was YES. [2024-06-27 21:34:57,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133793 conditions, 18100 events. 12735/18100 cut-off events. For 649465/649468 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 103918 event pairs, 3918 based on Foata normal form. 40/18131 useless extension candidates. Maximal degree in co-relation 133720. Up to 17275 conditions per place. [2024-06-27 21:34:57,550 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 236 selfloop transitions, 69 changer transitions 0/313 dead transitions. [2024-06-27 21:34:57,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 313 transitions, 4240 flow [2024-06-27 21:34:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-27 21:34:57,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43028846153846156 [2024-06-27 21:34:57,552 INFO L175 Difference]: Start difference. First operand has 163 places, 264 transitions, 3270 flow. Second operand 8 states and 179 transitions. [2024-06-27 21:34:57,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 313 transitions, 4240 flow [2024-06-27 21:34:58,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 313 transitions, 4045 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:58,434 INFO L231 Difference]: Finished difference. Result has 167 places, 268 transitions, 3379 flow [2024-06-27 21:34:58,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3075, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3379, PETRI_PLACES=167, PETRI_TRANSITIONS=268} [2024-06-27 21:34:58,435 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2024-06-27 21:34:58,435 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 268 transitions, 3379 flow [2024-06-27 21:34:58,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:58,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:58,435 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] [2024-06-27 21:34:58,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:34:58,436 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:34:58,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1298086975, now seen corresponding path program 4 times [2024-06-27 21:34:58,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:58,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630513555] [2024-06-27 21:34:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:58,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:01,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:01,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630513555] [2024-06-27 21:35:01,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630513555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:01,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:01,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:01,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89349617] [2024-06-27 21:35:01,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:01,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:01,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:01,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:01,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:01,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:35:01,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 268 transitions, 3379 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:01,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:01,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:35:01,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:06,061 INFO L124 PetriNetUnfolderBase]: 12979/18444 cut-off events. [2024-06-27 21:35:06,061 INFO L125 PetriNetUnfolderBase]: For 678131/678134 co-relation queries the response was YES. [2024-06-27 21:35:06,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137075 conditions, 18444 events. 12979/18444 cut-off events. For 678131/678134 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 106266 event pairs, 3872 based on Foata normal form. 28/18463 useless extension candidates. Maximal degree in co-relation 137001. Up to 17691 conditions per place. [2024-06-27 21:35:06,253 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 268 selfloop transitions, 41 changer transitions 0/317 dead transitions. [2024-06-27 21:35:06,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 317 transitions, 4361 flow [2024-06-27 21:35:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-27 21:35:06,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43509615384615385 [2024-06-27 21:35:06,255 INFO L175 Difference]: Start difference. First operand has 167 places, 268 transitions, 3379 flow. Second operand 8 states and 181 transitions. [2024-06-27 21:35:06,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 317 transitions, 4361 flow [2024-06-27 21:35:07,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 317 transitions, 4183 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:07,242 INFO L231 Difference]: Finished difference. Result has 170 places, 274 transitions, 3458 flow [2024-06-27 21:35:07,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3201, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3458, PETRI_PLACES=170, PETRI_TRANSITIONS=274} [2024-06-27 21:35:07,243 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2024-06-27 21:35:07,243 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 274 transitions, 3458 flow [2024-06-27 21:35:07,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:07,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:07,243 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] [2024-06-27 21:35:07,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:35:07,243 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:35:07,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:07,244 INFO L85 PathProgramCache]: Analyzing trace with hash -801368594, now seen corresponding path program 1 times [2024-06-27 21:35:07,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:07,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422135873] [2024-06-27 21:35:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:07,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:10,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:10,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422135873] [2024-06-27 21:35:10,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422135873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:10,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:10,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:35:10,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777104136] [2024-06-27 21:35:10,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:10,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:35:10,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:10,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:35:10,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:35:10,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:35:10,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 274 transitions, 3458 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:10,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:10,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:35:10,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:15,451 INFO L124 PetriNetUnfolderBase]: 13016/18376 cut-off events. [2024-06-27 21:35:15,451 INFO L125 PetriNetUnfolderBase]: For 673384/673387 co-relation queries the response was YES. [2024-06-27 21:35:15,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135750 conditions, 18376 events. 13016/18376 cut-off events. For 673384/673387 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 107578 event pairs, 3581 based on Foata normal form. 4/18355 useless extension candidates. Maximal degree in co-relation 135674. Up to 17275 conditions per place. [2024-06-27 21:35:15,609 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 229 selfloop transitions, 88 changer transitions 0/326 dead transitions. [2024-06-27 21:35:15,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 326 transitions, 4356 flow [2024-06-27 21:35:15,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 21:35:15,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639423076923077 [2024-06-27 21:35:15,610 INFO L175 Difference]: Start difference. First operand has 170 places, 274 transitions, 3458 flow. Second operand 8 states and 193 transitions. [2024-06-27 21:35:15,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 326 transitions, 4356 flow [2024-06-27 21:35:16,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 326 transitions, 4239 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 21:35:16,588 INFO L231 Difference]: Finished difference. Result has 173 places, 278 transitions, 3661 flow [2024-06-27 21:35:16,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3341, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3661, PETRI_PLACES=173, PETRI_TRANSITIONS=278} [2024-06-27 21:35:16,589 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 118 predicate places. [2024-06-27 21:35:16,589 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 278 transitions, 3661 flow [2024-06-27 21:35:16,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:16,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:16,589 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] [2024-06-27 21:35:16,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:35:16,590 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:35:16,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:16,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1342523644, now seen corresponding path program 2 times [2024-06-27 21:35:16,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:16,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234439281] [2024-06-27 21:35:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:16,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:20,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:20,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234439281] [2024-06-27 21:35:20,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234439281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:20,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:20,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:35:20,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298768961] [2024-06-27 21:35:20,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:20,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:35:20,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:20,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:35:20,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:35:20,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 52 [2024-06-27 21:35:20,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 278 transitions, 3661 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:20,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:20,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 52 [2024-06-27 21:35:20,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:25,312 INFO L124 PetriNetUnfolderBase]: 13094/18502 cut-off events. [2024-06-27 21:35:25,312 INFO L125 PetriNetUnfolderBase]: For 704595/704598 co-relation queries the response was YES. [2024-06-27 21:35:25,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139063 conditions, 18502 events. 13094/18502 cut-off events. For 704595/704598 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 108014 event pairs, 3506 based on Foata normal form. 4/18487 useless extension candidates. Maximal degree in co-relation 138986. Up to 17731 conditions per place. [2024-06-27 21:35:25,511 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 275 selfloop transitions, 47 changer transitions 0/331 dead transitions. [2024-06-27 21:35:25,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 331 transitions, 4651 flow [2024-06-27 21:35:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-27 21:35:25,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-06-27 21:35:25,513 INFO L175 Difference]: Start difference. First operand has 173 places, 278 transitions, 3661 flow. Second operand 8 states and 176 transitions. [2024-06-27 21:35:25,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 331 transitions, 4651 flow [2024-06-27 21:35:26,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 331 transitions, 4361 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 21:35:26,839 INFO L231 Difference]: Finished difference. Result has 178 places, 294 transitions, 3791 flow [2024-06-27 21:35:26,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3791, PETRI_PLACES=178, PETRI_TRANSITIONS=294} [2024-06-27 21:35:26,840 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 123 predicate places. [2024-06-27 21:35:26,840 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 294 transitions, 3791 flow [2024-06-27 21:35:26,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:26,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:26,841 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] [2024-06-27 21:35:26,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:35:26,841 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 21:35:26,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:26,841 INFO L85 PathProgramCache]: Analyzing trace with hash -796909052, now seen corresponding path program 3 times [2024-06-27 21:35:26,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:26,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948676723] [2024-06-27 21:35:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:26,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat